/*
* Copyright (C) 2007-2010 Openismus GmbH
* Copyright (C) 2013 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, see .
*
* Authors:
* Tristan Van Berkom
* Matthias Clasen
* William Jon McCann
*/
/* Preamble {{{1 */
/**
* SECTION:gtkflowbox
* @Short_Description: A container that allows reflowing its children
* @Title: GtkFlowBox
*
* A GtkFlowBox positions child widgets in sequence according to its
* orientation.
*
* For instance, with the horizontal orientation, the widgets will be
* arranged from left to right, starting a new row under the previous
* row when necessary. Reducing the width in this case will require more
* rows, so a larger height will be requested.
*
* Likewise, with the vertical orientation, the widgets will be arranged
* from top to bottom, starting a new column to the right when necessary.
* Reducing the height will require more columns, so a larger width will
* be requested.
*
* The children of a GtkFlowBox can be dynamically sorted and filtered.
*
* Although a GtkFlowBox must have only #GtkFlowBoxChild children,
* you can add any kind of widget to it via gtk_container_add(), and
* a GtkFlowBoxChild widget will automatically be inserted between
* the box and the widget.
*
* Also see #GtkListBox.
*
* GtkFlowBox was added in GTK+ 3.12.
*/
#include
#include "gtkflowbox.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkorientableprivate.h"
#include "gtkintl.h"
#include "gtkcssnodeprivate.h"
#include "gtkwidgetprivate.h"
#include "a11y/gtkflowboxaccessibleprivate.h"
#include "a11y/gtkflowboxchildaccessible.h"
/* Forward declarations and utilities {{{1 */
static void gtk_flow_box_update_cursor (GtkFlowBox *box,
GtkFlowBoxChild *child);
static void gtk_flow_box_select_and_activate (GtkFlowBox *box,
GtkFlowBoxChild *child);
static void gtk_flow_box_update_selection (GtkFlowBox *box,
GtkFlowBoxChild *child,
gboolean modify,
gboolean extend);
static void gtk_flow_box_apply_filter (GtkFlowBox *box,
GtkFlowBoxChild *child);
static void gtk_flow_box_apply_sort (GtkFlowBox *box,
GtkFlowBoxChild *child);
static gint gtk_flow_box_sort (GtkFlowBoxChild *a,
GtkFlowBoxChild *b,
GtkFlowBox *box);
static void
get_current_selection_modifiers (GtkWidget *widget,
gboolean *modify,
gboolean *extend)
{
GdkModifierType state = 0;
GdkModifierType mask;
*modify = FALSE;
*extend = FALSE;
if (gtk_get_current_event_state (&state))
{
mask = gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_MODIFY_SELECTION);
if ((state & mask) == mask)
*modify = TRUE;
mask = gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_EXTEND_SELECTION);
if ((state & mask) == mask)
*extend = TRUE;
}
}
static void
path_from_horizontal_line_rects (cairo_t *cr,
GdkRectangle *lines,
gint n_lines)
{
gint start_line, end_line;
GdkRectangle *r;
gint i;
/* Join rows vertically by extending to the middle */
for (i = 0; i < n_lines - 1; i++)
{
GdkRectangle *r1 = &lines[i];
GdkRectangle *r2 = &lines[i+1];
gint gap, old;
gap = r2->y - (r1->y + r1->height);
r1->height += gap / 2;
old = r2->y;
r2->y = r1->y + r1->height;
r2->height += old - r2->y;
}
cairo_new_path (cr);
start_line = 0;
do
{
for (i = start_line; i < n_lines; i++)
{
r = &lines[i];
if (i == start_line)
cairo_move_to (cr, r->x + r->width, r->y);
else
cairo_line_to (cr, r->x + r->width, r->y);
cairo_line_to (cr, r->x + r->width, r->y + r->height);
if (i < n_lines - 1 &&
(r->x + r->width < lines[i+1].x ||
r->x > lines[i+1].x + lines[i+1].width))
{
i++;
break;
}
}
end_line = i;
for (i = end_line - 1; i >= start_line; i--)
{
r = &lines[i];
cairo_line_to (cr, r->x, r->y + r->height);
cairo_line_to (cr, r->x, r->y);
}
cairo_close_path (cr);
start_line = end_line;
}
while (end_line < n_lines);
}
static void
path_from_vertical_line_rects (cairo_t *cr,
GdkRectangle *lines,
gint n_lines)
{
gint start_line, end_line;
GdkRectangle *r;
gint i;
/* Join rows horizontally by extending to the middle */
for (i = 0; i < n_lines - 1; i++)
{
GdkRectangle *r1 = &lines[i];
GdkRectangle *r2 = &lines[i+1];
gint gap, old;
gap = r2->x - (r1->x + r1->width);
r1->width += gap / 2;
old = r2->x;
r2->x = r1->x + r1->width;
r2->width += old - r2->x;
}
cairo_new_path (cr);
start_line = 0;
do
{
for (i = start_line; i < n_lines; i++)
{
r = &lines[i];
if (i == start_line)
cairo_move_to (cr, r->x, r->y + r->height);
else
cairo_line_to (cr, r->x, r->y + r->height);
cairo_line_to (cr, r->x + r->width, r->y + r->height);
if (i < n_lines - 1 &&
(r->y + r->height < lines[i+1].y ||
r->y > lines[i+1].y + lines[i+1].height))
{
i++;
break;
}
}
end_line = i;
for (i = end_line - 1; i >= start_line; i--)
{
r = &lines[i];
cairo_line_to (cr, r->x + r->width, r->y);
cairo_line_to (cr, r->x, r->y);
}
cairo_close_path (cr);
start_line = end_line;
}
while (end_line < n_lines);
}
/* GtkFlowBoxChild {{{1 */
/* GObject boilerplate {{{2 */
enum {
CHILD_ACTIVATE,
CHILD_LAST_SIGNAL
};
static guint child_signals[CHILD_LAST_SIGNAL] = { 0 };
typedef struct _GtkFlowBoxChildPrivate GtkFlowBoxChildPrivate;
struct _GtkFlowBoxChildPrivate
{
GSequenceIter *iter;
gboolean selected;
};
#define CHILD_PRIV(child) ((GtkFlowBoxChildPrivate*)gtk_flow_box_child_get_instance_private ((GtkFlowBoxChild*)(child)))
G_DEFINE_TYPE_WITH_PRIVATE (GtkFlowBoxChild, gtk_flow_box_child, GTK_TYPE_BIN)
/* Internal API {{{2 */
static GtkFlowBox *
gtk_flow_box_child_get_box (GtkFlowBoxChild *child)
{
GtkWidget *parent;
parent = gtk_widget_get_parent (GTK_WIDGET (child));
if (parent && GTK_IS_FLOW_BOX (parent))
return GTK_FLOW_BOX (parent);
return NULL;
}
static void
gtk_flow_box_child_set_focus (GtkFlowBoxChild *child)
{
GtkFlowBox *box = gtk_flow_box_child_get_box (child);
gboolean modify;
gboolean extend;
get_current_selection_modifiers (GTK_WIDGET (box), &modify, &extend);
if (modify)
gtk_flow_box_update_cursor (box, child);
else
gtk_flow_box_update_selection (box, child, FALSE, FALSE);
}
/* GtkWidget implementation {{{2 */
static gboolean
gtk_flow_box_child_focus (GtkWidget *widget,
GtkDirectionType direction)
{
gboolean had_focus = FALSE;
GtkWidget *child;
child = gtk_bin_get_child (GTK_BIN (widget));
g_object_get (widget, "has-focus", &had_focus, NULL);
if (had_focus)
{
/* If on row, going right, enter into possible container */
if (child &&
(direction == GTK_DIR_RIGHT || direction == GTK_DIR_TAB_FORWARD))
{
if (gtk_widget_child_focus (GTK_WIDGET (child), direction))
return TRUE;
}
return FALSE;
}
else if (gtk_container_get_focus_child (GTK_CONTAINER (widget)) != NULL)
{
/* Child has focus, always navigate inside it first */
if (gtk_widget_child_focus (child, direction))
return TRUE;
/* If exiting child container to the left, select child */
if (direction == GTK_DIR_LEFT || direction == GTK_DIR_TAB_BACKWARD)
{
gtk_flow_box_child_set_focus (GTK_FLOW_BOX_CHILD (widget));
return TRUE;
}
return FALSE;
}
else
{
/* If coming from the left, enter into possible container */
if (child &&
(direction == GTK_DIR_LEFT || direction == GTK_DIR_TAB_BACKWARD))
{
if (gtk_widget_child_focus (child, direction))
return TRUE;
}
gtk_flow_box_child_set_focus (GTK_FLOW_BOX_CHILD (widget));
return TRUE;
}
}
static void
gtk_flow_box_child_activate (GtkFlowBoxChild *child)
{
GtkFlowBox *box;
box = gtk_flow_box_child_get_box (child);
if (box)
gtk_flow_box_select_and_activate (box, child);
}
static gboolean
gtk_flow_box_child_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkAllocation allocation = {0};
GtkStyleContext* context;
GtkStateFlags state;
GtkBorder border;
gtk_widget_get_allocation (widget, &allocation);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_render_background (context, cr, 0, 0, allocation.width, allocation.height);
gtk_render_frame (context, cr, 0, 0, allocation.width, allocation.height);
if (gtk_widget_has_visible_focus (widget))
{
gtk_style_context_get_border (context, state, &border);
gtk_render_focus (context, cr, border.left, border.top,
allocation.width - border.left - border.right,
allocation.height - border.top - border.bottom);
}
GTK_WIDGET_CLASS (gtk_flow_box_child_parent_class)->draw (widget, cr);
return TRUE;
}
/* Size allocation {{{3 */
static void
gtk_flow_box_child_get_full_border (GtkFlowBoxChild *child,
GtkBorder *full_border)
{
GtkWidget *widget = GTK_WIDGET (child);
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding, border;
context = gtk_widget_get_style_context (widget);
state = gtk_style_context_get_state (context);
gtk_style_context_get_padding (context, state, &padding);
gtk_style_context_get_border (context, state, &border);
full_border->left = padding.left + border.left;
full_border->right = padding.right + border.right;
full_border->top = padding.top + border.top;
full_border->bottom = padding.bottom + border.bottom;
}
static GtkSizeRequestMode
gtk_flow_box_child_get_request_mode (GtkWidget *widget)
{
GtkFlowBox *box;
box = gtk_flow_box_child_get_box (GTK_FLOW_BOX_CHILD (widget));
if (box)
return gtk_widget_get_request_mode (GTK_WIDGET (box));
else
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
static void gtk_flow_box_child_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static void gtk_flow_box_child_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
static void
gtk_flow_box_child_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
if (gtk_flow_box_child_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
GtkWidget *child;
gint child_min = 0, child_natural = 0;
GtkBorder full_border = { 0, };
gtk_flow_box_child_get_full_border (GTK_FLOW_BOX_CHILD (widget), &full_border);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
gtk_widget_get_preferred_height_for_width (child, width - full_border.left - full_border.right,
&child_min, &child_natural);
*minimum_height = full_border.top + child_min + full_border.bottom;
*natural_height = full_border.top + child_natural + full_border.bottom;
}
else
{
gtk_flow_box_child_get_preferred_height (widget, minimum_height, natural_height);
}
}
static void
gtk_flow_box_child_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
if (gtk_flow_box_child_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
GtkWidget *child;
gint child_min = 0, child_natural = 0;
GtkBorder full_border = { 0, };
gtk_flow_box_child_get_full_border (GTK_FLOW_BOX_CHILD (widget), &full_border);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
gtk_widget_get_preferred_width (child, &child_min, &child_natural);
*minimum_width = full_border.left + child_min + full_border.right;
*natural_width = full_border.left + child_natural + full_border.right;
}
else
{
gint natural_height;
gtk_flow_box_child_get_preferred_height (widget, NULL, &natural_height);
gtk_flow_box_child_get_preferred_width_for_height (widget, natural_height,
minimum_width, natural_width);
}
}
static void
gtk_flow_box_child_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
if (gtk_flow_box_child_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
gtk_flow_box_child_get_preferred_width (widget, minimum_width, natural_width);
}
else
{
GtkWidget *child;
gint child_min = 0, child_natural = 0;
GtkBorder full_border = { 0, };
gtk_flow_box_child_get_full_border (GTK_FLOW_BOX_CHILD (widget), &full_border);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
gtk_widget_get_preferred_width_for_height (child, height - full_border.top - full_border.bottom,
&child_min, &child_natural);
*minimum_width = full_border.left + child_min + full_border.right;
*natural_width = full_border.left + child_natural + full_border.right;
}
}
static void
gtk_flow_box_child_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
if (gtk_flow_box_child_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
gint natural_width;
gtk_flow_box_child_get_preferred_width (widget, NULL, &natural_width);
gtk_flow_box_child_get_preferred_height_for_width (widget, natural_width,
minimum_height, natural_height);
}
else
{
GtkWidget *child;
gint child_min = 0, child_natural = 0;
GtkBorder full_border = { 0, };
gtk_flow_box_child_get_full_border (GTK_FLOW_BOX_CHILD (widget), &full_border);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
gtk_widget_get_preferred_height (child, &child_min, &child_natural);
*minimum_height = full_border.top + child_min + full_border.bottom;
*natural_height = full_border.top + child_natural + full_border.bottom;
}
}
static void
gtk_flow_box_child_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWidget *child;
gtk_widget_set_allocation (widget, allocation);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
{
GtkAllocation child_allocation;
GtkBorder border = { 0, };
gtk_flow_box_child_get_full_border (GTK_FLOW_BOX_CHILD (widget), &border);
child_allocation.x = allocation->x + border.left;
child_allocation.y = allocation->y + border.top;
child_allocation.width = allocation->width - border.left - border.right;
child_allocation.height = allocation->height - border.top - border.bottom;
child_allocation.width = MAX (1, child_allocation.width);
child_allocation.height = MAX (1, child_allocation.height);
gtk_widget_size_allocate (child, &child_allocation);
}
}
/* GObject implementation {{{2 */
static void
gtk_flow_box_child_class_init (GtkFlowBoxChildClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
widget_class->draw = gtk_flow_box_child_draw;
widget_class->get_request_mode = gtk_flow_box_child_get_request_mode;
widget_class->get_preferred_height = gtk_flow_box_child_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_flow_box_child_get_preferred_height_for_width;
widget_class->get_preferred_width = gtk_flow_box_child_get_preferred_width;
widget_class->get_preferred_width_for_height = gtk_flow_box_child_get_preferred_width_for_height;
widget_class->size_allocate = gtk_flow_box_child_size_allocate;
widget_class->focus = gtk_flow_box_child_focus;
class->activate = gtk_flow_box_child_activate;
/**
* GtkFlowBoxChild::activate:
* @child: The child on which the signal is emitted
*
* The ::activate signal is emitted when the user activates
* a child widget in a #GtkFlowBox, either by clicking or
* double-clicking, or by using the Space or Enter key.
*
* While this signal is used as a
* [keybinding signal][GtkBindingSignal],
* it can be used by applications for their own purposes.
*/
child_signals[CHILD_ACTIVATE] =
g_signal_new (I_("activate"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxChildClass, activate),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_class->activate_signal = child_signals[CHILD_ACTIVATE];
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_LIST_ITEM);
}
static void
gtk_flow_box_child_init (GtkFlowBoxChild *child)
{
GtkStyleContext *context;
gtk_widget_set_can_focus (GTK_WIDGET (child), TRUE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (child), TRUE);
context = gtk_widget_get_style_context (GTK_WIDGET (child));
gtk_style_context_add_class (context, "grid-child");
}
/* Public API {{{2 */
/**
* gtk_flow_box_child_new:
*
* Creates a new #GtkFlowBoxChild, to be used as a child
* of a #GtkFlowBox.
*
* Returns: a new #GtkFlowBoxChild
*
* Since: 3.12
*/
GtkWidget *
gtk_flow_box_child_new (void)
{
return g_object_new (GTK_TYPE_FLOW_BOX_CHILD, NULL);
}
/**
* gtk_flow_box_child_get_index:
* @child: a #GtkFlowBoxChild
*
* Gets the current index of the @child in its #GtkFlowBox container.
*
* Returns: the index of the @child, or -1 if the @child is not
* in a flow box.
*
* Since: 3.12
*/
gint
gtk_flow_box_child_get_index (GtkFlowBoxChild *child)
{
GtkFlowBoxChildPrivate *priv;
g_return_val_if_fail (GTK_IS_FLOW_BOX_CHILD (child), -1);
priv = CHILD_PRIV (child);
if (priv->iter != NULL)
return g_sequence_iter_get_position (priv->iter);
return -1;
}
/**
* gtk_flow_box_child_is_selected:
* @child: a #GtkFlowBoxChild
*
* Returns whether the @child is currently selected in its
* #GtkFlowBox container.
*
* Returns: %TRUE if @child is selected
*
* Since: 3.12
*/
gboolean
gtk_flow_box_child_is_selected (GtkFlowBoxChild *child)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX_CHILD (child), FALSE);
return CHILD_PRIV (child)->selected;
}
/**
* gtk_flow_box_child_changed:
* @child: a #GtkFlowBoxChild
*
* Marks @child as changed, causing any state that depends on this
* to be updated. This affects sorting and filtering.
*
* Note that calls to this method must be in sync with the data
* used for the sorting and filtering functions. For instance, if
* the list is mirroring some external data set, and *two* children
* changed in the external data set when you call
* gtk_flow_box_child_changed() on the first child, the sort function
* must only read the new data for the first of the two changed
* children, otherwise the resorting of the children will be wrong.
*
* This generally means that if you don’t fully control the data
* model, you have to duplicate the data that affects the sorting
* and filtering functions into the widgets themselves. Another
* alternative is to call gtk_flow_box_invalidate_sort() on any
* model change, but that is more expensive.
*
* Since: 3.12
*/
void
gtk_flow_box_child_changed (GtkFlowBoxChild *child)
{
GtkFlowBox *box;
g_return_if_fail (GTK_IS_FLOW_BOX_CHILD (child));
box = gtk_flow_box_child_get_box (child);
if (box == NULL)
return;
gtk_flow_box_apply_sort (box, child);
gtk_flow_box_apply_filter (box, child);
}
/* GtkFlowBox {{{1 */
/* Constants {{{2 */
#define DEFAULT_MAX_CHILDREN_PER_LINE 7
#define RUBBERBAND_START_DISTANCE 32
#define AUTOSCROLL_FAST_DISTANCE 32
#define AUTOSCROLL_FACTOR 20
#define AUTOSCROLL_FACTOR_FAST 10
/* GObject boilerplate {{{2 */
enum {
CHILD_ACTIVATED,
SELECTED_CHILDREN_CHANGED,
ACTIVATE_CURSOR_CHILD,
TOGGLE_CURSOR_CHILD,
MOVE_CURSOR,
SELECT_ALL,
UNSELECT_ALL,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
enum {
PROP_0,
PROP_HOMOGENEOUS,
PROP_COLUMN_SPACING,
PROP_ROW_SPACING,
PROP_MIN_CHILDREN_PER_LINE,
PROP_MAX_CHILDREN_PER_LINE,
PROP_SELECTION_MODE,
PROP_ACTIVATE_ON_SINGLE_CLICK,
/* orientable */
PROP_ORIENTATION,
LAST_PROP = PROP_ORIENTATION
};
static GParamSpec *props[LAST_PROP] = { NULL, };
typedef struct _GtkFlowBoxPrivate GtkFlowBoxPrivate;
struct _GtkFlowBoxPrivate {
GtkOrientation orientation;
gboolean homogeneous;
guint row_spacing;
guint column_spacing;
GtkFlowBoxChild *prelight_child;
GtkFlowBoxChild *cursor_child;
GtkFlowBoxChild *selected_child;
gboolean active_child_active;
GtkFlowBoxChild *active_child;
GtkSelectionMode selection_mode;
GtkAdjustment *hadjustment;
GtkAdjustment *vadjustment;
gboolean activate_on_single_click;
guint16 min_children_per_line;
guint16 max_children_per_line;
guint16 cur_children_per_line;
GSequence *children;
GtkFlowBoxFilterFunc filter_func;
gpointer filter_data;
GDestroyNotify filter_destroy;
GtkFlowBoxSortFunc sort_func;
gpointer sort_data;
GDestroyNotify sort_destroy;
GtkGesture *multipress_gesture;
GtkGesture *drag_gesture;
gboolean rubberband_select;
GtkFlowBoxChild *rubberband_first;
GtkFlowBoxChild *rubberband_last;
gboolean rubberband_modify;
gboolean rubberband_extend;
GtkScrollType autoscroll_mode;
guint autoscroll_id;
};
#define BOX_PRIV(box) ((GtkFlowBoxPrivate*)gtk_flow_box_get_instance_private ((GtkFlowBox*)(box)))
G_DEFINE_TYPE_WITH_CODE (GtkFlowBox, gtk_flow_box, GTK_TYPE_CONTAINER,
G_ADD_PRIVATE (GtkFlowBox)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
/* Internal API, utilities {{{2 */
#define ORIENTATION_ALIGN(box) \
(BOX_PRIV(box)->orientation == GTK_ORIENTATION_HORIZONTAL \
? gtk_widget_get_halign (GTK_WIDGET (box)) \
: gtk_widget_get_valign (GTK_WIDGET (box)))
#define OPPOSING_ORIENTATION_ALIGN(box) \
(BOX_PRIV(box)->orientation == GTK_ORIENTATION_HORIZONTAL \
? gtk_widget_get_valign (GTK_WIDGET (box)) \
: gtk_widget_get_halign (GTK_WIDGET (box)))
/* Children are visible if they are shown by the app (visible)
* and not filtered out (child_visible) by the box
*/
static inline gboolean
child_is_visible (GtkWidget *child)
{
return gtk_widget_get_visible (child) &&
gtk_widget_get_child_visible (child);
}
static gint
get_visible_children (GtkFlowBox *box)
{
GSequenceIter *iter;
gint i = 0;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
child = g_sequence_get (iter);
if (child_is_visible (child))
i++;
}
return i;
}
static GtkFlowBoxChild *
gtk_flow_box_find_child_at_pos (GtkFlowBox *box,
gint x,
gint y)
{
GtkWidget *child;
GSequenceIter *iter;
GtkAllocation allocation;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
gtk_widget_get_allocation (child, &allocation);
if (x >= allocation.x && x < (allocation.x + allocation.width) &&
y >= allocation.y && y < (allocation.y + allocation.height))
return GTK_FLOW_BOX_CHILD (child);
}
return NULL;
}
static void
gtk_flow_box_update_prelight (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (child != priv->prelight_child)
{
priv->prelight_child = child;
gtk_widget_queue_draw (GTK_WIDGET (box));
}
}
static void
gtk_flow_box_update_active (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gboolean val;
val = priv->active_child == child;
if (priv->active_child != NULL &&
val != priv->active_child_active)
{
priv->active_child_active = val;
gtk_widget_queue_draw (GTK_WIDGET (box));
}
}
static void
gtk_flow_box_apply_filter (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gboolean do_show;
do_show = TRUE;
if (priv->filter_func != NULL)
do_show = priv->filter_func (child, priv->filter_data);
gtk_widget_set_child_visible (GTK_WIDGET (child), do_show);
}
static void
gtk_flow_box_apply_filter_all (GtkFlowBox *box)
{
GSequenceIter *iter;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkFlowBoxChild *child;
child = g_sequence_get (iter);
gtk_flow_box_apply_filter (box, child);
}
gtk_widget_queue_resize (GTK_WIDGET (box));
}
static void
gtk_flow_box_apply_sort (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
if (BOX_PRIV (box)->sort_func != NULL)
{
g_sequence_sort_changed (CHILD_PRIV (child)->iter,
(GCompareDataFunc)gtk_flow_box_sort, box);
gtk_widget_queue_resize (GTK_WIDGET (box));
}
}
/* Selection utilities {{{3 */
static gboolean
gtk_flow_box_child_set_selected (GtkFlowBoxChild *child,
gboolean selected)
{
if (CHILD_PRIV (child)->selected != selected)
{
CHILD_PRIV (child)->selected = selected;
if (selected)
gtk_widget_set_state_flags (GTK_WIDGET (child),
GTK_STATE_FLAG_SELECTED, FALSE);
else
gtk_widget_unset_state_flags (GTK_WIDGET (child),
GTK_STATE_FLAG_SELECTED);
gtk_widget_queue_draw (GTK_WIDGET (child));
return TRUE;
}
return FALSE;
}
static gboolean
gtk_flow_box_unselect_all_internal (GtkFlowBox *box)
{
GtkFlowBoxChild *child;
GSequenceIter *iter;
gboolean dirty = FALSE;
if (BOX_PRIV (box)->selection_mode == GTK_SELECTION_NONE)
return FALSE;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
child = g_sequence_get (iter);
dirty |= gtk_flow_box_child_set_selected (child, FALSE);
}
return dirty;
}
static void
gtk_flow_box_unselect_child_internal (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
if (!CHILD_PRIV (child)->selected)
return;
if (BOX_PRIV (box)->selection_mode == GTK_SELECTION_NONE)
return;
else if (BOX_PRIV (box)->selection_mode != GTK_SELECTION_MULTIPLE)
gtk_flow_box_unselect_all_internal (box);
else
gtk_flow_box_child_set_selected (child, FALSE);
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
static void
gtk_flow_box_update_cursor (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
BOX_PRIV (box)->cursor_child = child;
gtk_widget_grab_focus (GTK_WIDGET (child));
gtk_widget_queue_draw (GTK_WIDGET (child));
_gtk_flow_box_accessible_update_cursor (GTK_WIDGET (box), GTK_WIDGET (child));
}
static void
gtk_flow_box_select_child_internal (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
if (CHILD_PRIV (child)->selected)
return;
if (BOX_PRIV (box)->selection_mode == GTK_SELECTION_NONE)
return;
if (BOX_PRIV (box)->selection_mode != GTK_SELECTION_MULTIPLE)
gtk_flow_box_unselect_all_internal (box);
gtk_flow_box_child_set_selected (child, TRUE);
BOX_PRIV (box)->selected_child = child;
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
static void
gtk_flow_box_select_all_between (GtkFlowBox *box,
GtkFlowBoxChild *child1,
GtkFlowBoxChild *child2,
gboolean modify)
{
GSequenceIter *iter, *iter1, *iter2;
if (child1)
iter1 = CHILD_PRIV (child1)->iter;
else
iter1 = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
if (child2)
iter2 = CHILD_PRIV (child2)->iter;
else
iter2 = g_sequence_get_end_iter (BOX_PRIV (box)->children);
if (g_sequence_iter_compare (iter2, iter1) < 0)
{
iter = iter1;
iter1 = iter2;
iter2 = iter;
}
for (iter = iter1;
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
child = g_sequence_get (iter);
if (child_is_visible (child))
{
if (modify)
gtk_flow_box_child_set_selected (GTK_FLOW_BOX_CHILD (child), !CHILD_PRIV (child)->selected);
else
gtk_flow_box_child_set_selected (GTK_FLOW_BOX_CHILD (child), TRUE);
}
if (g_sequence_iter_compare (iter, iter2) == 0)
break;
}
}
static void
gtk_flow_box_update_selection (GtkFlowBox *box,
GtkFlowBoxChild *child,
gboolean modify,
gboolean extend)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gtk_flow_box_update_cursor (box, child);
if (priv->selection_mode == GTK_SELECTION_NONE)
return;
if (priv->selection_mode == GTK_SELECTION_BROWSE)
{
gtk_flow_box_unselect_all_internal (box);
gtk_flow_box_child_set_selected (child, TRUE);
priv->selected_child = child;
}
else if (priv->selection_mode == GTK_SELECTION_SINGLE)
{
gboolean was_selected;
was_selected = CHILD_PRIV (child)->selected;
gtk_flow_box_unselect_all_internal (box);
gtk_flow_box_child_set_selected (child, modify ? !was_selected : TRUE);
priv->selected_child = CHILD_PRIV (child)->selected ? child : NULL;
}
else /* GTK_SELECTION_MULTIPLE */
{
if (extend)
{
gtk_flow_box_unselect_all_internal (box);
if (priv->selected_child == NULL)
{
gtk_flow_box_child_set_selected (child, TRUE);
priv->selected_child = child;
}
else
gtk_flow_box_select_all_between (box, priv->selected_child, child, FALSE);
}
else
{
if (modify)
{
gtk_flow_box_child_set_selected (child, !CHILD_PRIV (child)->selected);
}
else
{
gtk_flow_box_unselect_all_internal (box);
gtk_flow_box_child_set_selected (child, !CHILD_PRIV (child)->selected);
priv->selected_child = child;
}
}
}
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
static void
gtk_flow_box_select_and_activate (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
if (child != NULL)
{
gtk_flow_box_select_child_internal (box, child);
gtk_flow_box_update_cursor (box, child);
g_signal_emit (box, signals[CHILD_ACTIVATED], 0, child);
}
}
/* Focus utilities {{{3 */
static GSequenceIter *
gtk_flow_box_get_previous_focusable (GtkFlowBox *box,
GSequenceIter *iter)
{
GtkFlowBoxChild *child;
while (!g_sequence_iter_is_begin (iter))
{
iter = g_sequence_iter_prev (iter);
child = g_sequence_get (iter);
if (child_is_visible (GTK_WIDGET (child)) &&
gtk_widget_is_sensitive (GTK_WIDGET (child)))
return iter;
}
return NULL;
}
static GSequenceIter *
gtk_flow_box_get_next_focusable (GtkFlowBox *box,
GSequenceIter *iter)
{
GtkFlowBoxChild *child;
while (TRUE)
{
iter = g_sequence_iter_next (iter);
if (g_sequence_iter_is_end (iter))
return NULL;
child = g_sequence_get (iter);
if (child_is_visible (GTK_WIDGET (child)) &&
gtk_widget_is_sensitive (GTK_WIDGET (child)))
return iter;
}
return NULL;
}
static GSequenceIter *
gtk_flow_box_get_first_focusable (GtkFlowBox *box)
{
GSequenceIter *iter;
GtkFlowBoxChild *child;
iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
if (g_sequence_iter_is_end (iter))
return NULL;
child = g_sequence_get (iter);
if (child_is_visible (GTK_WIDGET (child)) &&
gtk_widget_is_sensitive (GTK_WIDGET (child)))
return iter;
return gtk_flow_box_get_next_focusable (box, iter);
}
static GSequenceIter *
gtk_flow_box_get_last_focusable (GtkFlowBox *box)
{
GSequenceIter *iter;
iter = g_sequence_get_end_iter (BOX_PRIV (box)->children);
return gtk_flow_box_get_previous_focusable (box, iter);
}
static GSequenceIter *
gtk_flow_box_get_above_focusable (GtkFlowBox *box,
GSequenceIter *iter)
{
GtkFlowBoxChild *child = NULL;
gint i;
while (TRUE)
{
i = 0;
while (i < BOX_PRIV (box)->cur_children_per_line)
{
if (g_sequence_iter_is_begin (iter))
return NULL;
iter = g_sequence_iter_prev (iter);
child = g_sequence_get (iter);
if (child_is_visible (GTK_WIDGET (child)))
i++;
}
if (child && gtk_widget_get_sensitive (GTK_WIDGET (child)))
return iter;
}
return NULL;
}
static GSequenceIter *
gtk_flow_box_get_below_focusable (GtkFlowBox *box,
GSequenceIter *iter)
{
GtkFlowBoxChild *child = NULL;
gint i;
while (TRUE)
{
i = 0;
while (i < BOX_PRIV (box)->cur_children_per_line)
{
iter = g_sequence_iter_next (iter);
if (g_sequence_iter_is_end (iter))
return NULL;
child = g_sequence_get (iter);
if (child_is_visible (GTK_WIDGET (child)))
i++;
}
if (child && gtk_widget_get_sensitive (GTK_WIDGET (child)))
return iter;
}
return NULL;
}
/* GtkWidget implementation {{{2 */
/* Size allocation {{{3 */
/* Used in columned modes where all items share at least their
* equal widths or heights
*/
static void
get_max_item_size (GtkFlowBox *box,
GtkOrientation orientation,
gint *min_size,
gint *nat_size)
{
GSequenceIter *iter;
gint max_min_size = 0;
gint max_nat_size = 0;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
gint child_min, child_nat;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_width (child, &child_min, &child_nat);
else
gtk_widget_get_preferred_height (child, &child_min, &child_nat);
max_min_size = MAX (max_min_size, child_min);
max_nat_size = MAX (max_nat_size, child_nat);
}
if (min_size)
*min_size = max_min_size;
if (nat_size)
*nat_size = max_nat_size;
}
/* Gets the largest minimum/natural size for a given size (used to get
* the largest item heights for a fixed item width and the opposite)
*/
static void
get_largest_size_for_opposing_orientation (GtkFlowBox *box,
GtkOrientation orientation,
gint item_size,
gint *min_item_size,
gint *nat_item_size)
{
GSequenceIter *iter;
gint max_min_size = 0;
gint max_nat_size = 0;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
gint child_min, child_nat;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_height_for_width (child,
item_size,
&child_min, &child_nat);
else
gtk_widget_get_preferred_width_for_height (child,
item_size,
&child_min, &child_nat);
max_min_size = MAX (max_min_size, child_min);
max_nat_size = MAX (max_nat_size, child_nat);
}
if (min_item_size)
*min_item_size = max_min_size;
if (nat_item_size)
*nat_item_size = max_nat_size;
}
/* Gets the largest minimum/natural size on a single line for a given size
* (used to get the largest line heights for a fixed item width and the opposite
* while iterating over a list of children, note the new index is returned)
*/
static GSequenceIter *
get_largest_size_for_line_in_opposing_orientation (GtkFlowBox *box,
GtkOrientation orientation,
GSequenceIter *cursor,
gint line_length,
GtkRequestedSize *item_sizes,
gint extra_pixels,
gint *min_item_size,
gint *nat_item_size)
{
GSequenceIter *iter;
gint max_min_size = 0;
gint max_nat_size = 0;
gint i;
i = 0;
for (iter = cursor;
!g_sequence_iter_is_end (iter) && i < line_length;
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
gint child_min, child_nat, this_item_size;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
/* Distribute the extra pixels to the first children in the line
* (could be fancier and spread them out more evenly) */
this_item_size = item_sizes[i].minimum_size;
if (extra_pixels > 0 && ORIENTATION_ALIGN (box) == GTK_ALIGN_FILL)
{
this_item_size++;
extra_pixels--;
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_height_for_width (child,
this_item_size,
&child_min, &child_nat);
else
gtk_widget_get_preferred_width_for_height (child,
this_item_size,
&child_min, &child_nat);
max_min_size = MAX (max_min_size, child_min);
max_nat_size = MAX (max_nat_size, child_nat);
i++;
}
if (min_item_size)
*min_item_size = max_min_size;
if (nat_item_size)
*nat_item_size = max_nat_size;
/* Return next item in the list */
return iter;
}
/* fit_aligned_item_requests() helper */
static gint
gather_aligned_item_requests (GtkFlowBox *box,
GtkOrientation orientation,
gint line_length,
gint item_spacing,
gint n_children,
GtkRequestedSize *item_sizes)
{
GSequenceIter *iter;
gint i;
gint extra_items, natural_line_size = 0;
extra_items = n_children % line_length;
i = 0;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
GtkAlign item_align;
gint child_min, child_nat;
gint position;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_width (child,
&child_min, &child_nat);
else
gtk_widget_get_preferred_height (child,
&child_min, &child_nat);
/* Get the index and push it over for the last line when spreading to the end */
position = i % line_length;
item_align = ORIENTATION_ALIGN (box);
if (item_align == GTK_ALIGN_END && i >= n_children - extra_items)
position += line_length - extra_items;
/* Round up the size of every column/row */
item_sizes[position].minimum_size = MAX (item_sizes[position].minimum_size, child_min);
item_sizes[position].natural_size = MAX (item_sizes[position].natural_size, child_nat);
i++;
}
for (i = 0; i < line_length; i++)
natural_line_size += item_sizes[i].natural_size;
natural_line_size += (line_length - 1) * item_spacing;
return natural_line_size;
}
static GtkRequestedSize *
fit_aligned_item_requests (GtkFlowBox *box,
GtkOrientation orientation,
gint avail_size,
gint item_spacing,
gint *line_length, /* in-out */
gint items_per_line,
gint n_children)
{
GtkRequestedSize *sizes, *try_sizes;
gint try_line_size, try_length;
sizes = g_new0 (GtkRequestedSize, *line_length);
/* get the sizes for the initial guess */
try_line_size = gather_aligned_item_requests (box,
orientation,
*line_length,
item_spacing,
n_children,
sizes);
/* Try columnizing the whole thing and adding an item to the end of
* the line; try to fit as many columns into the available size as
* possible
*/
for (try_length = *line_length + 1; try_line_size < avail_size; try_length++)
{
try_sizes = g_new0 (GtkRequestedSize, try_length);
try_line_size = gather_aligned_item_requests (box,
orientation,
try_length,
item_spacing,
n_children,
try_sizes);
if (try_line_size <= avail_size &&
items_per_line >= try_length)
{
*line_length = try_length;
g_free (sizes);
sizes = try_sizes;
}
else
{
/* oops, this one failed; stick to the last size that fit and then return */
g_free (try_sizes);
break;
}
}
return sizes;
}
typedef struct {
GArray *requested;
gint extra_pixels;
} AllocatedLine;
static gint
get_offset_pixels (GtkAlign align,
gint pixels)
{
gint offset;
switch (align) {
case GTK_ALIGN_START:
case GTK_ALIGN_FILL:
offset = 0;
break;
case GTK_ALIGN_CENTER:
offset = pixels / 2;
break;
case GTK_ALIGN_END:
offset = pixels;
break;
default:
g_assert_not_reached ();
break;
}
return offset;
}
static void
gtk_flow_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkAllocation child_allocation;
gint avail_size, avail_other_size, min_items, item_spacing, line_spacing;
GtkAlign item_align;
GtkAlign line_align;
GdkWindow *window;
GtkRequestedSize *line_sizes = NULL;
GtkRequestedSize *item_sizes = NULL;
gint min_item_size, nat_item_size;
gint line_length;
gint item_size = 0;
gint line_size = 0, min_fixed_line_size = 0, nat_fixed_line_size = 0;
gint line_offset, item_offset, n_children, n_lines, line_count;
gint extra_pixels = 0, extra_per_item = 0, extra_extra = 0;
gint extra_line_pixels = 0, extra_per_line = 0, extra_line_extra = 0;
gint i, this_line_size;
GSequenceIter *iter;
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.width = 0;
child_allocation.height = 0;
gtk_widget_set_allocation (widget, allocation);
window = gtk_widget_get_window (widget);
if (window != NULL)
gdk_window_move_resize (window,
allocation->x, allocation->y,
allocation->width, allocation->height);
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.width = allocation->width;
min_items = MAX (1, priv->min_children_per_line);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
avail_size = allocation->width;
avail_other_size = allocation->height;
item_spacing = priv->column_spacing; line_spacing = priv->row_spacing;
}
else /* GTK_ORIENTATION_VERTICAL */
{
avail_size = allocation->height;
avail_other_size = allocation->width;
item_spacing = priv->row_spacing;
line_spacing = priv->column_spacing;
}
item_align = ORIENTATION_ALIGN (box);
line_align = OPPOSING_ORIENTATION_ALIGN (box);
/* Get how many lines we'll be needing to flow */
n_children = get_visible_children (box);
if (n_children <= 0)
return;
/*
* Deal with ALIGNED/HOMOGENEOUS modes first, start with
* initial guesses at item/line sizes
*/
get_max_item_size (box, priv->orientation, &min_item_size, &nat_item_size);
if (nat_item_size <= 0)
return;
/* By default flow at the natural item width */
line_length = avail_size / (nat_item_size + item_spacing);
/* After the above aproximation, check if we cant fit one more on the line */
if (line_length * item_spacing + (line_length + 1) * nat_item_size <= avail_size)
line_length++;
/* Its possible we were allocated just less than the natural width of the
* minimum item flow length */
line_length = MAX (min_items, line_length);
line_length = MIN (line_length, priv->max_children_per_line);
/* Here we just use the largest height-for-width and use that for the height
* of all lines */
if (priv->homogeneous)
{
n_lines = n_children / line_length;
if ((n_children % line_length) > 0)
n_lines++;
n_lines = MAX (n_lines, 1);
/* Now we need the real item allocation size */
item_size = (avail_size - (line_length - 1) * item_spacing) / line_length;
/* Cut out the expand space if we're not distributing any */
if (item_align != GTK_ALIGN_FILL)
item_size = MIN (item_size, nat_item_size);
get_largest_size_for_opposing_orientation (box,
priv->orientation,
item_size,
&min_fixed_line_size,
&nat_fixed_line_size);
/* resolve a fixed 'line_size' */
line_size = (avail_other_size - (n_lines - 1) * line_spacing) / n_lines;
if (line_align != GTK_ALIGN_FILL)
line_size = MIN (line_size, nat_fixed_line_size);
/* Get the real extra pixels incase of GTK_ALIGN_START lines */
extra_pixels = avail_size - (line_length - 1) * item_spacing - item_size * line_length;
extra_line_pixels = avail_other_size - (n_lines - 1) * line_spacing - line_size * n_lines;
}
else
{
gboolean first_line = TRUE;
/* Find the amount of columns that can fit aligned into the available space
* and collect their requests.
*/
item_sizes = fit_aligned_item_requests (box,
priv->orientation,
avail_size,
item_spacing,
&line_length,
priv->max_children_per_line,
n_children);
/* Calculate the number of lines after determining the final line_length */
n_lines = n_children / line_length;
if ((n_children % line_length) > 0)
n_lines++;
n_lines = MAX (n_lines, 1);
line_sizes = g_new0 (GtkRequestedSize, n_lines);
/* Get the available remaining size */
avail_size -= (line_length - 1) * item_spacing;
for (i = 0; i < line_length; i++)
avail_size -= item_sizes[i].minimum_size;
/* Perform a natural allocation on the columnized items and get the remaining pixels */
if (avail_size > 0)
extra_pixels = gtk_distribute_natural_allocation (avail_size, line_length, item_sizes);
/* Now that we have the size of each column of items find the size of each individual
* line based on the aligned item sizes.
*/
for (i = 0, iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter) && i < n_lines;
i++)
{
iter = get_largest_size_for_line_in_opposing_orientation (box,
priv->orientation,
iter,
line_length,
item_sizes,
extra_pixels,
&line_sizes[i].minimum_size,
&line_sizes[i].natural_size);
/* Its possible a line is made of completely invisible children */
if (line_sizes[i].natural_size > 0)
{
if (first_line)
first_line = FALSE;
else
avail_other_size -= line_spacing;
avail_other_size -= line_sizes[i].minimum_size;
line_sizes[i].data = GINT_TO_POINTER (i);
}
}
/* Distribute space among lines naturally */
if (avail_other_size > 0)
extra_line_pixels = gtk_distribute_natural_allocation (avail_other_size, n_lines, line_sizes);
}
/*
* Initial sizes of items/lines guessed at this point,
* go on to distribute expand space if needed.
*/
priv->cur_children_per_line = line_length;
/* FIXME: This portion needs to consider which columns
* and rows asked for expand space and distribute those
* accordingly for the case of ALIGNED allocation.
*
* If at least one child in a column/row asked for expand;
* we should make that row/column expand entirely.
*/
/* Calculate expand space per item */
if (item_align == GTK_ALIGN_FILL)
{
extra_per_item = extra_pixels / line_length;
extra_extra = extra_pixels % line_length;
}
/* Calculate expand space per line */
if (line_align == GTK_ALIGN_FILL)
{
extra_per_line = extra_line_pixels / n_lines;
extra_line_extra = extra_line_pixels % n_lines;
}
/*
* Prepare item/line initial offsets and jump into the
* real allocation loop.
*/
line_offset = item_offset = 0;
/* prepend extra space to item_offset/line_offset for SPREAD_END */
item_offset += get_offset_pixels (item_align, extra_pixels);
line_offset += get_offset_pixels (line_align, extra_line_pixels);
/* Get the allocation size for the first line */
if (priv->homogeneous)
this_line_size = line_size;
else
{
this_line_size = line_sizes[0].minimum_size;
if (line_align == GTK_ALIGN_FILL)
{
this_line_size += extra_per_line;
if (extra_line_extra > 0)
this_line_size++;
}
}
i = 0;
line_count = 0;
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
gint position;
gint this_item_size;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
/* Get item position */
position = i % line_length;
/* adjust the line_offset/count at the beginning of each new line */
if (i > 0 && position == 0)
{
/* Push the line_offset */
line_offset += this_line_size + line_spacing;
line_count++;
/* Get the new line size */
if (priv->homogeneous)
this_line_size = line_size;
else
{
this_line_size = line_sizes[line_count].minimum_size;
if (line_align == GTK_ALIGN_FILL)
{
this_line_size += extra_per_line;
if (line_count < extra_line_extra)
this_line_size++;
}
}
item_offset = 0;
if (item_align == GTK_ALIGN_CENTER)
{
item_offset += get_offset_pixels (item_align, extra_pixels);
}
else if (item_align == GTK_ALIGN_END)
{
item_offset += get_offset_pixels (item_align, extra_pixels);
/* If we're on the last line, prepend the space for
* any leading items */
if (line_count == n_lines -1)
{
gint extra_items = n_children % line_length;
if (priv->homogeneous)
{
item_offset += item_size * (line_length - extra_items);
item_offset += item_spacing * (line_length - extra_items);
}
else
{
gint j;
for (j = 0; j < (line_length - extra_items); j++)
{
item_offset += item_sizes[j].minimum_size;
item_offset += item_spacing;
}
}
}
}
}
/* Push the index along for the last line when spreading to the end */
if (item_align == GTK_ALIGN_END && line_count == n_lines -1)
{
gint extra_items = n_children % line_length;
position += line_length - extra_items;
}
if (priv->homogeneous)
this_item_size = item_size;
else
this_item_size = item_sizes[position].minimum_size;
if (item_align == GTK_ALIGN_FILL)
{
this_item_size += extra_per_item;
if (position < extra_extra)
this_item_size++;
}
/* Do the actual allocation */
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
child_allocation.x = item_offset;
child_allocation.y = line_offset;
child_allocation.width = this_item_size;
child_allocation.height = this_line_size;
}
else /* GTK_ORIENTATION_VERTICAL */
{
child_allocation.x = line_offset;
child_allocation.y = item_offset;
child_allocation.width = this_line_size;
child_allocation.height = this_item_size;
}
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
gtk_widget_size_allocate (child, &child_allocation);
item_offset += this_item_size;
item_offset += item_spacing;
i++;
}
g_free (item_sizes);
g_free (line_sizes);
}
static GtkSizeRequestMode
gtk_flow_box_get_request_mode (GtkWidget *widget)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
return (BOX_PRIV (box)->orientation == GTK_ORIENTATION_HORIZONTAL) ?
GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH : GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT;
}
/* Gets the largest minimum and natural length of
* 'line_length' consecutive items when aligned into rows/columns */
static void
get_largest_aligned_line_length (GtkFlowBox *box,
GtkOrientation orientation,
gint line_length,
gint *min_size,
gint *nat_size)
{
GSequenceIter *iter;
gint max_min_size = 0;
gint max_nat_size = 0;
gint spacing, i;
GtkRequestedSize *aligned_item_sizes;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
spacing = BOX_PRIV (box)->column_spacing;
else
spacing = BOX_PRIV (box)->row_spacing;
aligned_item_sizes = g_new0 (GtkRequestedSize, line_length);
/* Get the largest sizes of each index in the line.
*/
i = 0;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
gint child_min, child_nat;
child = g_sequence_get (iter);
if (!child_is_visible (child))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_width (child,
&child_min, &child_nat);
else /* GTK_ORIENTATION_VERTICAL */
gtk_widget_get_preferred_height (child,
&child_min, &child_nat);
aligned_item_sizes[i % line_length].minimum_size =
MAX (aligned_item_sizes[i % line_length].minimum_size, child_min);
aligned_item_sizes[i % line_length].natural_size =
MAX (aligned_item_sizes[i % line_length].natural_size, child_nat);
i++;
}
/* Add up the largest indexes */
for (i = 0; i < line_length; i++)
{
max_min_size += aligned_item_sizes[i].minimum_size;
max_nat_size += aligned_item_sizes[i].natural_size;
}
g_free (aligned_item_sizes);
max_min_size += (line_length - 1) * spacing;
max_nat_size += (line_length - 1) * spacing;
if (min_size)
*min_size = max_min_size;
if (nat_size)
*nat_size = max_nat_size;
}
static void
gtk_flow_box_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gint min_item_width, nat_item_width;
gint min_items, nat_items;
gint min_width, nat_width;
min_items = MAX (1, priv->min_children_per_line);
nat_items = MAX (min_items, priv->max_children_per_line);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
min_width = nat_width = 0;
if (!priv->homogeneous)
{
/* When not homogeneous; horizontally oriented boxes
* need enough width for the widest row */
if (min_items == 1)
{
get_max_item_size (box,
GTK_ORIENTATION_HORIZONTAL,
&min_item_width,
&nat_item_width);
min_width += min_item_width;
nat_width += nat_item_width;
}
else
{
gint min_line_length, nat_line_length;
get_largest_aligned_line_length (box,
GTK_ORIENTATION_HORIZONTAL,
min_items,
&min_line_length,
&nat_line_length);
if (nat_items > min_items)
get_largest_aligned_line_length (box,
GTK_ORIENTATION_HORIZONTAL,
nat_items,
NULL,
&nat_line_length);
min_width += min_line_length;
nat_width += nat_line_length;
}
}
else /* In homogeneous mode; horizontally oriented boxs
* give the same width to all children */
{
get_max_item_size (box, GTK_ORIENTATION_HORIZONTAL,
&min_item_width, &nat_item_width);
min_width += min_item_width * min_items;
min_width += (min_items -1) * priv->column_spacing;
nat_width += nat_item_width * nat_items;
nat_width += (nat_items -1) * priv->column_spacing;
}
}
else /* GTK_ORIENTATION_VERTICAL */
{
/* Return the width for the minimum height */
gint min_height, nat_height;
GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, &min_height, &nat_height);
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width_for_height (widget,
min_height,
&min_width,
&nat_width);
}
if (minimum_size)
*minimum_size = min_width;
if (natural_size)
*natural_size = nat_width;
}
static void
gtk_flow_box_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gint min_item_height, nat_item_height;
gint min_items, nat_items;
gint min_height, nat_height;
min_items = MAX (1, priv->min_children_per_line);
nat_items = MAX (min_items, priv->max_children_per_line);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Return the height for the minimum width */
gint min_width, nat_width;
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, &nat_width);
GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget,
min_width,
&min_height,
&nat_height);
}
else /* GTK_ORIENTATION_VERTICAL */
{
min_height = nat_height = 0;
if (! priv->homogeneous)
{
/* When not homogeneous; vertically oriented boxes
* need enough height for the tallest column */
if (min_items == 1)
{
get_max_item_size (box, GTK_ORIENTATION_VERTICAL,
&min_item_height, &nat_item_height);
min_height += min_item_height;
nat_height += nat_item_height;
}
else
{
gint min_line_length, nat_line_length;
get_largest_aligned_line_length (box,
GTK_ORIENTATION_VERTICAL,
min_items,
&min_line_length,
&nat_line_length);
if (nat_items > min_items)
get_largest_aligned_line_length (box,
GTK_ORIENTATION_VERTICAL,
nat_items,
NULL,
&nat_line_length);
min_height += min_line_length;
nat_height += nat_line_length;
}
}
else
{
/* In homogeneous mode; vertically oriented boxes
* give the same height to all children
*/
get_max_item_size (box,
GTK_ORIENTATION_VERTICAL,
&min_item_height,
&nat_item_height);
min_height += min_item_height * min_items;
min_height += (min_items -1) * priv->row_spacing;
nat_height += nat_item_height * nat_items;
nat_height += (nat_items -1) * priv->row_spacing;
}
}
if (minimum_size)
*minimum_size = min_height;
if (natural_size)
*natural_size = nat_height;
}
static void
gtk_flow_box_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gint min_item_width, nat_item_width;
gint min_items;
gint min_height, nat_height;
gint avail_size, n_children;
min_items = MAX (1, priv->min_children_per_line);
min_height = 0;
nat_height = 0;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gint min_width, nat_width;
gint line_length;
gint item_size, extra_pixels;
n_children = get_visible_children (box);
if (n_children <= 0)
goto out;
/* Make sure its no smaller than the minimum */
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, &nat_width);
avail_size = MAX (width, min_width);
if (avail_size <= 0)
goto out;
get_max_item_size (box, GTK_ORIENTATION_HORIZONTAL, &min_item_width, &nat_item_width);
if (nat_item_width <= 0)
goto out;
/* By default flow at the natural item width */
line_length = avail_size / (nat_item_width + priv->column_spacing);
/* After the above aproximation, check if we cant fit one more on the line */
if (line_length * priv->column_spacing + (line_length + 1) * nat_item_width <= avail_size)
line_length++;
/* Its possible we were allocated just less than the natural width of the
* minimum item flow length
*/
line_length = MAX (min_items, line_length);
line_length = MIN (line_length, priv->max_children_per_line);
/* Now we need the real item allocation size */
item_size = (avail_size - (line_length - 1) * priv->column_spacing) / line_length;
/* Cut out the expand space if we're not distributing any */
if (gtk_widget_get_halign (widget) != GTK_ALIGN_FILL)
{
item_size = MIN (item_size, nat_item_width);
extra_pixels = 0;
}
else
/* Collect the extra pixels for expand children */
extra_pixels = (avail_size - (line_length - 1) * priv->column_spacing) % line_length;
if (priv->homogeneous)
{
gint min_item_height, nat_item_height;
gint lines;
/* Here we just use the largest height-for-width and
* add up the size accordingly
*/
get_largest_size_for_opposing_orientation (box,
GTK_ORIENTATION_HORIZONTAL,
item_size,
&min_item_height,
&nat_item_height);
/* Round up how many lines we need to allocate for */
lines = n_children / line_length;
if ((n_children % line_length) > 0)
lines++;
min_height = min_item_height * lines;
nat_height = nat_item_height * lines;
min_height += (lines - 1) * priv->row_spacing;
nat_height += (lines - 1) * priv->row_spacing;
}
else
{
gint min_line_height, nat_line_height, i;
gboolean first_line = TRUE;
GtkRequestedSize *item_sizes;
GSequenceIter *iter;
/* First get the size each set of items take to span the line
* when aligning the items above and below after flowping.
*/
item_sizes = fit_aligned_item_requests (box,
priv->orientation,
avail_size,
priv->column_spacing,
&line_length,
priv->max_children_per_line,
n_children);
/* Get the available remaining size */
avail_size -= (line_length - 1) * priv->column_spacing;
for (i = 0; i < line_length; i++)
avail_size -= item_sizes[i].minimum_size;
if (avail_size > 0)
extra_pixels = gtk_distribute_natural_allocation (avail_size, line_length, item_sizes);
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);)
{
iter = get_largest_size_for_line_in_opposing_orientation (box,
GTK_ORIENTATION_HORIZONTAL,
iter,
line_length,
item_sizes,
extra_pixels,
&min_line_height,
&nat_line_height);
/* Its possible the line only had invisible widgets */
if (nat_line_height > 0)
{
if (first_line)
first_line = FALSE;
else
{
min_height += priv->row_spacing;
nat_height += priv->row_spacing;
}
min_height += min_line_height;
nat_height += nat_line_height;
}
}
g_free (item_sizes);
}
}
else /* GTK_ORIENTATION_VERTICAL */
{
/* Return the minimum height */
GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, &min_height, &nat_height);
}
out:
if (minimum_height)
*minimum_height = min_height;
if (natural_height)
*natural_height = nat_height;
}
static void
gtk_flow_box_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gint min_item_height, nat_item_height;
gint min_items;
gint min_width, nat_width;
gint avail_size, n_children;
min_items = MAX (1, priv->min_children_per_line);
min_width = 0;
nat_width = 0;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Return the minimum width */
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, &nat_width);
}
else /* GTK_ORIENTATION_VERTICAL */
{
gint min_height, nat_height;
gint line_length;
gint item_size, extra_pixels;
n_children = get_visible_children (box);
if (n_children <= 0)
goto out;
/* Make sure its no smaller than the minimum */
GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, &min_height, &nat_height);
avail_size = MAX (height, min_height);
if (avail_size <= 0)
goto out;
get_max_item_size (box, GTK_ORIENTATION_VERTICAL, &min_item_height, &nat_item_height);
/* By default flow at the natural item width */
line_length = avail_size / (nat_item_height + priv->row_spacing);
/* After the above aproximation, check if we cant fit one more on the line */
if (line_length * priv->row_spacing + (line_length + 1) * nat_item_height <= avail_size)
line_length++;
/* Its possible we were allocated just less than the natural width of the
* minimum item flow length
*/
line_length = MAX (min_items, line_length);
line_length = MIN (line_length, priv->max_children_per_line);
/* Now we need the real item allocation size */
item_size = (avail_size - (line_length - 1) * priv->row_spacing) / line_length;
/* Cut out the expand space if we're not distributing any */
if (gtk_widget_get_valign (widget) != GTK_ALIGN_FILL)
{
item_size = MIN (item_size, nat_item_height);
extra_pixels = 0;
}
else
/* Collect the extra pixels for expand children */
extra_pixels = (avail_size - (line_length - 1) * priv->row_spacing) % line_length;
if (priv->homogeneous)
{
gint min_item_width, nat_item_width;
gint lines;
/* Here we just use the largest height-for-width and
* add up the size accordingly
*/
get_largest_size_for_opposing_orientation (box,
GTK_ORIENTATION_VERTICAL,
item_size,
&min_item_width,
&nat_item_width);
/* Round up how many lines we need to allocate for */
n_children = get_visible_children (box);
lines = n_children / line_length;
if ((n_children % line_length) > 0)
lines++;
min_width = min_item_width * lines;
nat_width = nat_item_width * lines;
min_width += (lines - 1) * priv->column_spacing;
nat_width += (lines - 1) * priv->column_spacing;
}
else
{
gint min_line_width, nat_line_width, i;
gboolean first_line = TRUE;
GtkRequestedSize *item_sizes;
GSequenceIter *iter;
/* First get the size each set of items take to span the line
* when aligning the items above and below after flowping.
*/
item_sizes = fit_aligned_item_requests (box,
priv->orientation,
avail_size,
priv->row_spacing,
&line_length,
priv->max_children_per_line,
n_children);
/* Get the available remaining size */
avail_size -= (line_length - 1) * priv->column_spacing;
for (i = 0; i < line_length; i++)
avail_size -= item_sizes[i].minimum_size;
if (avail_size > 0)
extra_pixels = gtk_distribute_natural_allocation (avail_size, line_length, item_sizes);
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);)
{
iter = get_largest_size_for_line_in_opposing_orientation (box,
GTK_ORIENTATION_VERTICAL,
iter,
line_length,
item_sizes,
extra_pixels,
&min_line_width,
&nat_line_width);
/* Its possible the last line only had invisible widgets */
if (nat_line_width > 0)
{
if (first_line)
first_line = FALSE;
else
{
min_width += priv->column_spacing;
nat_width += priv->column_spacing;
}
min_width += min_line_width;
nat_width += nat_line_width;
}
}
g_free (item_sizes);
}
}
out:
if (minimum_width)
*minimum_width = min_width;
if (natural_width)
*natural_width = nat_width;
}
/* Drawing {{{3 */
static gboolean
gtk_flow_box_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkAllocation allocation = { 0, };
GtkStyleContext* context;
gtk_widget_get_allocation (GTK_WIDGET (box), &allocation);
context = gtk_widget_get_style_context (GTK_WIDGET (box));
gtk_render_background (context, cr, 0, 0, allocation.width, allocation.height);
GTK_WIDGET_CLASS (gtk_flow_box_parent_class)->draw (widget, cr);
if (priv->rubberband_first && priv->rubberband_last)
{
GSequenceIter *iter, *iter1, *iter2;
GdkRectangle line_rect, rect;
GArray *lines;
gboolean vertical;
vertical = priv->orientation == GTK_ORIENTATION_VERTICAL;
cairo_save (cr);
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RUBBERBAND);
iter1 = CHILD_PRIV (priv->rubberband_first)->iter;
iter2 = CHILD_PRIV (priv->rubberband_last)->iter;
if (g_sequence_iter_compare (iter2, iter1) < 0)
{
iter = iter1;
iter1 = iter2;
iter2 = iter;
}
line_rect.width = 0;
lines = g_array_new (FALSE, FALSE, sizeof (GdkRectangle));
for (iter = iter1;
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
GtkWidget *child;
child = g_sequence_get (iter);
gtk_widget_get_allocation (GTK_WIDGET (child), &rect);
if (line_rect.width == 0)
line_rect = rect;
else
{
if ((vertical && rect.x == line_rect.x) ||
(!vertical && rect.y == line_rect.y))
gdk_rectangle_union (&rect, &line_rect, &line_rect);
else
{
g_array_append_val (lines, line_rect);
line_rect = rect;
}
}
if (g_sequence_iter_compare (iter, iter2) == 0)
break;
}
if (line_rect.width != 0)
g_array_append_val (lines, line_rect);
if (lines->len > 0)
{
GtkStateFlags state;
cairo_path_t *path;
GtkBorder border;
GdkRGBA border_color;
if (vertical)
path_from_vertical_line_rects (cr, (GdkRectangle *)lines->data, lines->len);
else
path_from_horizontal_line_rects (cr, (GdkRectangle *)lines->data, lines->len);
/* For some reason we need to copy and reapply the path,
* or it gets eaten by gtk_render_background()
*/
path = cairo_copy_path (cr);
cairo_save (cr);
cairo_clip (cr);
gtk_widget_get_allocation (widget, &allocation);
gtk_render_background (context, cr,
0, 0,
allocation.width, allocation.height);
cairo_restore (cr);
cairo_append_path (cr, path);
cairo_path_destroy (path);
state = gtk_widget_get_state_flags (widget);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_style_context_get_border_color (context, state, &border_color);
G_GNUC_END_IGNORE_DEPRECATIONS
gtk_style_context_get_border (context, state, &border);
cairo_set_line_width (cr, border.left);
gdk_cairo_set_source_rgba (cr, &border_color);
cairo_stroke (cr);
}
g_array_free (lines, TRUE);
gtk_style_context_restore (context);
cairo_restore (cr);
}
return TRUE;
}
/* Autoscrolling {{{3 */
static void
remove_autoscroll (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (priv->autoscroll_id)
{
gtk_widget_remove_tick_callback (GTK_WIDGET (box), priv->autoscroll_id);
priv->autoscroll_id = 0;
}
priv->autoscroll_mode = GTK_SCROLL_NONE;
}
static gboolean
autoscroll_cb (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer data)
{
GtkFlowBox *box = GTK_FLOW_BOX (data);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkAdjustment *adjustment;
gdouble factor;
gdouble increment;
gdouble value;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
adjustment = priv->vadjustment;
else
adjustment = priv->hadjustment;
switch (priv->autoscroll_mode)
{
case GTK_SCROLL_STEP_FORWARD:
factor = AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_STEP_BACKWARD:
factor = - AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_PAGE_FORWARD:
factor = AUTOSCROLL_FACTOR_FAST;
break;
case GTK_SCROLL_PAGE_BACKWARD:
factor = - AUTOSCROLL_FACTOR_FAST;
break;
default:
g_assert_not_reached ();
}
increment = gtk_adjustment_get_step_increment (adjustment) / factor;
value = gtk_adjustment_get_value (adjustment);
value += increment;
gtk_adjustment_set_value (adjustment, value);
if (priv->rubberband_select)
{
GdkEventSequence *sequence;
gdouble x, y;
GtkFlowBoxChild *child;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (priv->drag_gesture));
gtk_gesture_get_point (priv->drag_gesture, sequence, &x, &y);
child = gtk_flow_box_find_child_at_pos (box, x, y);
gtk_flow_box_update_prelight (box, child);
gtk_flow_box_update_active (box, child);
if (child != NULL)
priv->rubberband_last = child;
}
return G_SOURCE_CONTINUE;
}
static void
add_autoscroll (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (priv->autoscroll_id != 0 ||
priv->autoscroll_mode == GTK_SCROLL_NONE)
return;
priv->autoscroll_id = gtk_widget_add_tick_callback (GTK_WIDGET (box),
autoscroll_cb,
box,
NULL);
}
static gboolean
get_view_rect (GtkFlowBox *box,
GdkRectangle *rect)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkWidget *parent;
GdkWindow *view;
parent = gtk_widget_get_parent (GTK_WIDGET (box));
if (GTK_IS_VIEWPORT (parent))
{
view = gtk_viewport_get_view_window (GTK_VIEWPORT (parent));
rect->x = rect->y = 0;
rect->x = gtk_adjustment_get_value (priv->hadjustment);
rect->y = gtk_adjustment_get_value (priv->vadjustment);
rect->width = gdk_window_get_width (view);
rect->height = gdk_window_get_height (view);
return TRUE;
}
return FALSE;
}
static void
update_autoscroll_mode (GtkFlowBox *box,
gint x,
gint y)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkScrollType mode = GTK_SCROLL_NONE;
GdkRectangle rect;
gint size, pos;
if (priv->rubberband_select && get_view_rect (box, &rect))
{
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
size = rect.width;
pos = x - rect.x;
}
else
{
size = rect.height;
pos = y - rect.y;
}
if (pos < 0 - AUTOSCROLL_FAST_DISTANCE)
mode = GTK_SCROLL_PAGE_BACKWARD;
else if (pos > size + AUTOSCROLL_FAST_DISTANCE)
mode = GTK_SCROLL_PAGE_FORWARD;
else if (pos < 0)
mode = GTK_SCROLL_STEP_BACKWARD;
else if (pos > size)
mode = GTK_SCROLL_STEP_FORWARD;
}
if (mode != priv->autoscroll_mode)
{
remove_autoscroll (box);
priv->autoscroll_mode = mode;
add_autoscroll (box);
}
}
/* Event handling {{{3 */
static gboolean
gtk_flow_box_enter_notify_event (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxChild *child;
if (event->window != gtk_widget_get_window (GTK_WIDGET (box)))
return FALSE;
child = gtk_flow_box_find_child_at_pos (box, event->x, event->y);
gtk_flow_box_update_prelight (box, child);
gtk_flow_box_update_active (box, child);
return FALSE;
}
static gboolean
gtk_flow_box_leave_notify_event (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxChild *child = NULL;
if (event->window != gtk_widget_get_window (GTK_WIDGET (box)))
return FALSE;
if (event->detail != GDK_NOTIFY_INFERIOR)
child = NULL;
else
child = gtk_flow_box_find_child_at_pos (box, event->x, event->y);
gtk_flow_box_update_prelight (box, child);
gtk_flow_box_update_active (box, child);
return FALSE;
}
static void
gtk_flow_box_drag_gesture_update (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gdouble start_x, start_y;
GtkFlowBoxChild *child;
gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y);
if (!priv->rubberband_select &&
(offset_x * offset_x) + (offset_y * offset_y) > RUBBERBAND_START_DISTANCE * RUBBERBAND_START_DISTANCE)
{
priv->rubberband_select = TRUE;
priv->rubberband_first = gtk_flow_box_find_child_at_pos (box, start_x, start_y);
/* Grab focus here, so Escape-to-stop-rubberband works */
gtk_flow_box_update_cursor (box, priv->rubberband_first);
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
}
if (priv->rubberband_select)
{
child = gtk_flow_box_find_child_at_pos (box, start_x + offset_x,
start_y + offset_y);
if (priv->rubberband_first == NULL)
priv->rubberband_first = child;
if (child != NULL)
priv->rubberband_last = child;
update_autoscroll_mode (box, start_x + offset_x, start_y + offset_y);
gtk_widget_queue_draw (GTK_WIDGET (box));
}
}
static gboolean
gtk_flow_box_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxChild *child;
GdkWindow *window;
GdkWindow *event_window;
gint relative_x;
gint relative_y;
gdouble parent_x;
gdouble parent_y;
window = gtk_widget_get_window (GTK_WIDGET (box));
event_window = event->window;
relative_x = event->x;
relative_y = event->y;
while ((event_window != NULL) && (event_window != window))
{
gdk_window_coords_to_parent (event_window,
relative_x, relative_y,
&parent_x, &parent_y);
relative_x = parent_x;
relative_y = parent_y;
event_window = gdk_window_get_effective_parent (event_window);
}
child = gtk_flow_box_find_child_at_pos (box, relative_x, relative_y);
gtk_flow_box_update_prelight (box, child);
gtk_flow_box_update_active (box, child);
return GTK_WIDGET_CLASS (gtk_flow_box_parent_class)->motion_notify_event (widget, event);
}
static void
gtk_flow_box_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GtkFlowBoxChild *child;
child = gtk_flow_box_find_child_at_pos (box, x, y);
if (child == NULL)
return;
/* The drag gesture is only triggered by first press */
if (n_press != 1)
gtk_gesture_set_state (priv->drag_gesture, GTK_EVENT_SEQUENCE_DENIED);
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
priv->active_child = child;
priv->active_child_active = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (box));
if (n_press == 2 && !priv->activate_on_single_click)
g_signal_emit (box, signals[CHILD_ACTIVATED], 0, child);
}
static void
gtk_flow_box_multipress_gesture_released (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (priv->active_child != NULL && priv->active_child_active)
{
if (priv->activate_on_single_click)
gtk_flow_box_select_and_activate (box, priv->active_child);
else
{
GdkEventSequence *sequence;
GdkInputSource source;
const GdkEvent *event;
gboolean modify;
gboolean extend;
get_current_selection_modifiers (GTK_WIDGET (box), &modify, &extend);
/* With touch, we default to modifying the selection.
* You can still clear the selection and start over
* by holding Ctrl.
*/
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
source = gdk_device_get_source (gdk_event_get_source_device (event));
if (source == GDK_SOURCE_TOUCHSCREEN)
modify = !modify;
gtk_flow_box_update_selection (box, priv->active_child, modify, extend);
}
}
priv->active_child = NULL;
priv->active_child_active = FALSE;
gtk_widget_queue_draw (GTK_WIDGET (box));
}
static void
gtk_flow_box_drag_gesture_begin (GtkGestureDrag *gesture,
gdouble start_x,
gdouble start_y,
GtkWidget *widget)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (widget);
if (priv->selection_mode != GTK_SELECTION_MULTIPLE)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
priv->rubberband_select = FALSE;
priv->rubberband_first = NULL;
priv->rubberband_last = NULL;
get_current_selection_modifiers (widget, &priv->rubberband_modify, &priv->rubberband_extend);
}
static void
gtk_flow_box_stop_rubberband (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
priv->rubberband_select = FALSE;
priv->rubberband_first = NULL;
priv->rubberband_last = NULL;
remove_autoscroll (box);
gtk_widget_queue_draw (GTK_WIDGET (box));
}
static void
gtk_flow_box_drag_gesture_end (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
GdkEventSequence *sequence;
if (!priv->rubberband_select)
return;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
if (gtk_gesture_handles_sequence (GTK_GESTURE (gesture), sequence))
{
if (!priv->rubberband_extend && !priv->rubberband_modify)
gtk_flow_box_unselect_all_internal (box);
gtk_flow_box_select_all_between (box, priv->rubberband_first, priv->rubberband_last, priv->rubberband_modify);
gtk_flow_box_stop_rubberband (box);
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
else
gtk_flow_box_stop_rubberband (box);
gtk_widget_queue_draw (GTK_WIDGET (box));
}
static gboolean
gtk_flow_box_key_press_event (GtkWidget *widget,
GdkEventKey *event)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (priv->rubberband_select)
{
if (event->keyval == GDK_KEY_Escape)
{
gtk_flow_box_stop_rubberband (box);
return TRUE;
}
}
return GTK_WIDGET_CLASS (gtk_flow_box_parent_class)->key_press_event (widget, event);
}
/* Realize and map {{{3 */
static void
gtk_flow_box_realize (GtkWidget *widget)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkAllocation allocation;
GdkWindowAttr attributes = {0};
GdkWindow *window;
gtk_widget_get_allocation (GTK_WIDGET (box), &allocation);
gtk_widget_set_realized (GTK_WIDGET (box), TRUE);
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (GTK_WIDGET (box))
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK
| GDK_POINTER_MOTION_MASK
| GDK_EXPOSURE_MASK
| GDK_KEY_PRESS_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK;
attributes.wclass = GDK_INPUT_OUTPUT;
window = gdk_window_new (gtk_widget_get_parent_window (GTK_WIDGET (box)),
&attributes, GDK_WA_X | GDK_WA_Y);
gtk_widget_register_window (GTK_WIDGET (box), window);
gtk_widget_set_window (GTK_WIDGET (box), window);
}
static void
gtk_flow_box_unmap (GtkWidget *widget)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
remove_autoscroll (box);
GTK_WIDGET_CLASS (gtk_flow_box_parent_class)->unmap (widget);
}
/* GtkContainer implementation {{{2 */
static void
gtk_flow_box_add (GtkContainer *container,
GtkWidget *child)
{
gtk_flow_box_insert (GTK_FLOW_BOX (container), child, -1);
}
static void
gtk_flow_box_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkFlowBox *box = GTK_FLOW_BOX (container);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gboolean was_visible;
gboolean was_selected;
GtkFlowBoxChild *child;
if (GTK_IS_FLOW_BOX_CHILD (widget))
child = GTK_FLOW_BOX_CHILD (widget);
else
{
child = (GtkFlowBoxChild*)gtk_widget_get_parent (widget);
if (!GTK_IS_FLOW_BOX_CHILD (child))
{
g_warning ("Tried to remove non-child %p\n", widget);
return;
}
}
was_visible = child_is_visible (GTK_WIDGET (child));
was_selected = CHILD_PRIV (child)->selected;
if (child == priv->prelight_child)
priv->prelight_child = NULL;
if (child == priv->active_child)
priv->active_child = NULL;
if (child == priv->selected_child)
priv->selected_child = NULL;
gtk_widget_unparent (GTK_WIDGET (child));
g_sequence_remove (CHILD_PRIV (child)->iter);
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (box)))
gtk_widget_queue_resize (GTK_WIDGET (box));
if (was_selected)
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
static void
gtk_flow_box_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_target)
{
GSequenceIter *iter;
GtkWidget *child;
iter = g_sequence_get_begin_iter (BOX_PRIV (container)->children);
while (!g_sequence_iter_is_end (iter))
{
child = g_sequence_get (iter);
iter = g_sequence_iter_next (iter);
callback (child, callback_target);
}
}
static GType
gtk_flow_box_child_type (GtkContainer *container)
{
return GTK_TYPE_FLOW_BOX_CHILD;
}
/* Keynav {{{2 */
static gboolean
gtk_flow_box_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkFlowBox *box = GTK_FLOW_BOX (widget);
GtkWidget *focus_child;
GSequenceIter *iter;
GtkFlowBoxChild *next_focus_child;
focus_child = gtk_container_get_focus_child (GTK_CONTAINER (box));
next_focus_child = NULL;
if (focus_child != NULL)
{
if (gtk_widget_child_focus (focus_child, direction))
return TRUE;
iter = CHILD_PRIV (focus_child)->iter;
if (direction == GTK_DIR_LEFT || direction == GTK_DIR_TAB_BACKWARD)
iter = gtk_flow_box_get_previous_focusable (box, iter);
else if (direction == GTK_DIR_RIGHT || direction == GTK_DIR_TAB_FORWARD)
iter = gtk_flow_box_get_next_focusable (box, iter);
else if (direction == GTK_DIR_UP)
iter = gtk_flow_box_get_above_focusable (box, iter);
else if (direction == GTK_DIR_DOWN)
iter = gtk_flow_box_get_below_focusable (box, iter);
if (iter != NULL)
next_focus_child = g_sequence_get (iter);
}
else
{
if (BOX_PRIV (box)->selected_child)
next_focus_child = BOX_PRIV (box)->selected_child;
else
{
if (direction == GTK_DIR_UP || direction == GTK_DIR_TAB_BACKWARD)
iter = gtk_flow_box_get_last_focusable (box);
else
iter = gtk_flow_box_get_first_focusable (box);
if (iter != NULL)
next_focus_child = g_sequence_get (iter);
}
}
if (next_focus_child == NULL)
{
if (direction == GTK_DIR_UP || direction == GTK_DIR_DOWN ||
direction == GTK_DIR_LEFT || direction == GTK_DIR_RIGHT)
{
if (gtk_widget_keynav_failed (GTK_WIDGET (box), direction))
return TRUE;
}
return FALSE;
}
if (gtk_widget_child_focus (GTK_WIDGET (next_focus_child), direction))
return TRUE;
return TRUE;
}
static void
gtk_flow_box_add_move_binding (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modmask,
GtkMovementStep step,
gint count)
{
GdkDisplay *display;
GdkModifierType extend_mod_mask = GDK_SHIFT_MASK;
GdkModifierType modify_mod_mask = GDK_CONTROL_MASK;
display = gdk_display_get_default ();
if (display)
{
extend_mod_mask = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
GDK_MODIFIER_INTENT_EXTEND_SELECTION);
modify_mod_mask = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
GDK_MODIFIER_INTENT_MODIFY_SELECTION);
}
gtk_binding_entry_add_signal (binding_set, keyval, modmask,
"move-cursor", 2,
GTK_TYPE_MOVEMENT_STEP, step,
G_TYPE_INT, count,
NULL);
gtk_binding_entry_add_signal (binding_set, keyval, modmask | extend_mod_mask,
"move-cursor", 2,
GTK_TYPE_MOVEMENT_STEP, step,
G_TYPE_INT, count,
NULL);
gtk_binding_entry_add_signal (binding_set, keyval, modmask | modify_mod_mask,
"move-cursor", 2,
GTK_TYPE_MOVEMENT_STEP, step,
G_TYPE_INT, count,
NULL);
gtk_binding_entry_add_signal (binding_set, keyval, modmask | extend_mod_mask | modify_mod_mask,
"move-cursor", 2,
GTK_TYPE_MOVEMENT_STEP, step,
G_TYPE_INT, count,
NULL);
}
static void
gtk_flow_box_activate_cursor_child (GtkFlowBox *box)
{
gtk_flow_box_select_and_activate (box, BOX_PRIV (box)->cursor_child);
}
static void
gtk_flow_box_toggle_cursor_child (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
if (priv->cursor_child == NULL)
return;
if ((priv->selection_mode == GTK_SELECTION_SINGLE ||
priv->selection_mode == GTK_SELECTION_MULTIPLE) &&
CHILD_PRIV (priv->cursor_child)->selected)
gtk_flow_box_unselect_child_internal (box, priv->cursor_child);
else
gtk_flow_box_select_and_activate (box, priv->cursor_child);
}
static void
gtk_flow_box_move_cursor (GtkFlowBox *box,
GtkMovementStep step,
gint count)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gboolean modify;
gboolean extend;
GtkFlowBoxChild *child;
GtkFlowBoxChild *prev;
GtkFlowBoxChild *next;
GtkAllocation allocation;
gint page_size;
GSequenceIter *iter;
gint start;
GtkAdjustment *adjustment;
gboolean vertical;
vertical = priv->orientation == GTK_ORIENTATION_VERTICAL;
if (vertical)
{
switch (step)
{
case GTK_MOVEMENT_VISUAL_POSITIONS:
step = GTK_MOVEMENT_DISPLAY_LINES;
break;
case GTK_MOVEMENT_DISPLAY_LINES:
step = GTK_MOVEMENT_VISUAL_POSITIONS;
break;
default: ;
}
}
child = NULL;
switch (step)
{
case GTK_MOVEMENT_VISUAL_POSITIONS:
if (priv->cursor_child != NULL)
{
iter = CHILD_PRIV (priv->cursor_child)->iter;
if (gtk_widget_get_direction (GTK_WIDGET (box)) == GTK_TEXT_DIR_RTL)
count = - count;
while (count < 0 && iter != NULL)
{
iter = gtk_flow_box_get_previous_focusable (box, iter);
count = count + 1;
}
while (count > 0 && iter != NULL)
{
iter = gtk_flow_box_get_next_focusable (box, iter);
count = count - 1;
}
if (iter != NULL && !g_sequence_iter_is_end (iter))
child = g_sequence_get (iter);
}
break;
case GTK_MOVEMENT_BUFFER_ENDS:
if (count < 0)
iter = gtk_flow_box_get_first_focusable (box);
else
iter = gtk_flow_box_get_last_focusable (box);
if (iter != NULL)
child = g_sequence_get (iter);
break;
case GTK_MOVEMENT_DISPLAY_LINES:
if (priv->cursor_child != NULL)
{
iter = CHILD_PRIV (priv->cursor_child)->iter;
while (count < 0 && iter != NULL)
{
iter = gtk_flow_box_get_above_focusable (box, iter);
count = count + 1;
}
while (count > 0 && iter != NULL)
{
iter = gtk_flow_box_get_below_focusable (box, iter);
count = count - 1;
}
if (iter != NULL)
child = g_sequence_get (iter);
}
break;
case GTK_MOVEMENT_PAGES:
page_size = 100;
adjustment = vertical ? priv->hadjustment : priv->vadjustment;
if (adjustment)
page_size = gtk_adjustment_get_page_increment (adjustment);
if (priv->cursor_child != NULL)
{
child = priv->cursor_child;
iter = CHILD_PRIV (child)->iter;
gtk_widget_get_allocation (GTK_WIDGET (child), &allocation);
start = vertical ? allocation.x : allocation.y;
if (count < 0)
{
gint i = 0;
/* Up */
while (iter != NULL)
{
iter = gtk_flow_box_get_previous_focusable (box, iter);
if (iter == NULL)
break;
prev = g_sequence_get (iter);
/* go up an even number of rows */
if (i % priv->cur_children_per_line == 0)
{
gtk_widget_get_allocation (GTK_WIDGET (prev), &allocation);
if ((vertical ? allocation.x : allocation.y) < start - page_size)
break;
}
child = prev;
i++;
}
}
else
{
gint i = 0;
/* Down */
while (!g_sequence_iter_is_end (iter))
{
iter = gtk_flow_box_get_next_focusable (box, iter);
if (g_sequence_iter_is_end (iter))
break;
next = g_sequence_get (iter);
if (i % priv->cur_children_per_line == 0)
{
gtk_widget_get_allocation (GTK_WIDGET (next), &allocation);
if ((vertical ? allocation.x : allocation.y) > start + page_size)
break;
}
child = next;
i++;
}
}
gtk_widget_get_allocation (GTK_WIDGET (child), &allocation);
}
break;
default:
g_assert_not_reached ();
}
if (child == NULL || child == priv->cursor_child)
{
GtkDirectionType direction = count < 0 ? GTK_DIR_UP : GTK_DIR_DOWN;
if (!gtk_widget_keynav_failed (GTK_WIDGET (box), direction))
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (box));
if (toplevel)
gtk_widget_child_focus (toplevel,
direction == GTK_DIR_UP ?
GTK_DIR_TAB_BACKWARD :
GTK_DIR_TAB_FORWARD);
}
return;
}
get_current_selection_modifiers (GTK_WIDGET (box), &modify, &extend);
gtk_flow_box_update_cursor (box, child);
if (!modify)
gtk_flow_box_update_selection (box, child, FALSE, extend);
}
/* Selection {{{2 */
static void
gtk_flow_box_selected_children_changed (GtkFlowBox *box)
{
_gtk_flow_box_accessible_selection_changed (GTK_WIDGET (box));
}
/* GObject implementation {{{2 */
static void
gtk_flow_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkFlowBox *box = GTK_FLOW_BOX (object);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_HOMOGENEOUS:
g_value_set_boolean (value, priv->homogeneous);
break;
case PROP_COLUMN_SPACING:
g_value_set_uint (value, priv->column_spacing);
break;
case PROP_ROW_SPACING:
g_value_set_uint (value, priv->row_spacing);
break;
case PROP_MIN_CHILDREN_PER_LINE:
g_value_set_uint (value, priv->min_children_per_line);
break;
case PROP_MAX_CHILDREN_PER_LINE:
g_value_set_uint (value, priv->max_children_per_line);
break;
case PROP_SELECTION_MODE:
g_value_set_enum (value, priv->selection_mode);
break;
case PROP_ACTIVATE_ON_SINGLE_CLICK:
g_value_set_boolean (value, priv->activate_on_single_click);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_flow_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFlowBox *box = GTK_FLOW_BOX (object);
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
switch (prop_id)
{
case PROP_ORIENTATION:
if (priv->orientation != g_value_get_enum (value))
{
priv->orientation = g_value_get_enum (value);
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (box));
/* Re-box the children in the new orientation */
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_HOMOGENEOUS:
gtk_flow_box_set_homogeneous (box, g_value_get_boolean (value));
break;
case PROP_COLUMN_SPACING:
gtk_flow_box_set_column_spacing (box, g_value_get_uint (value));
break;
case PROP_ROW_SPACING:
gtk_flow_box_set_row_spacing (box, g_value_get_uint (value));
break;
case PROP_MIN_CHILDREN_PER_LINE:
gtk_flow_box_set_min_children_per_line (box, g_value_get_uint (value));
break;
case PROP_MAX_CHILDREN_PER_LINE:
gtk_flow_box_set_max_children_per_line (box, g_value_get_uint (value));
break;
case PROP_SELECTION_MODE:
gtk_flow_box_set_selection_mode (box, g_value_get_enum (value));
break;
case PROP_ACTIVATE_ON_SINGLE_CLICK:
gtk_flow_box_set_activate_on_single_click (box, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_flow_box_finalize (GObject *obj)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (obj);
if (priv->filter_destroy != NULL)
priv->filter_destroy (priv->filter_data);
if (priv->sort_destroy != NULL)
priv->sort_destroy (priv->sort_data);
g_sequence_free (priv->children);
g_clear_object (&priv->hadjustment);
g_clear_object (&priv->vadjustment);
g_object_unref (priv->drag_gesture);
g_object_unref (priv->multipress_gesture);
G_OBJECT_CLASS (gtk_flow_box_parent_class)->finalize (obj);
}
static void
gtk_flow_box_class_init (GtkFlowBoxClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
GtkBindingSet *binding_set;
object_class->finalize = gtk_flow_box_finalize;
object_class->get_property = gtk_flow_box_get_property;
object_class->set_property = gtk_flow_box_set_property;
widget_class->enter_notify_event = gtk_flow_box_enter_notify_event;
widget_class->leave_notify_event = gtk_flow_box_leave_notify_event;
widget_class->motion_notify_event = gtk_flow_box_motion_notify_event;
widget_class->size_allocate = gtk_flow_box_size_allocate;
widget_class->realize = gtk_flow_box_realize;
widget_class->unmap = gtk_flow_box_unmap;
widget_class->focus = gtk_flow_box_focus;
widget_class->draw = gtk_flow_box_draw;
widget_class->key_press_event = gtk_flow_box_key_press_event;
widget_class->get_request_mode = gtk_flow_box_get_request_mode;
widget_class->get_preferred_width = gtk_flow_box_get_preferred_width;
widget_class->get_preferred_height = gtk_flow_box_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_flow_box_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_flow_box_get_preferred_width_for_height;
container_class->add = gtk_flow_box_add;
container_class->remove = gtk_flow_box_remove;
container_class->forall = gtk_flow_box_forall;
container_class->child_type = gtk_flow_box_child_type;
gtk_container_class_handle_border_width (container_class);
class->activate_cursor_child = gtk_flow_box_activate_cursor_child;
class->toggle_cursor_child = gtk_flow_box_toggle_cursor_child;
class->move_cursor = gtk_flow_box_move_cursor;
class->select_all = gtk_flow_box_select_all;
class->unselect_all = gtk_flow_box_unselect_all;
class->selected_children_changed = gtk_flow_box_selected_children_changed;
g_object_class_override_property (object_class, PROP_ORIENTATION, "orientation");
/**
* GtkFlowBox:selection-mode:
*
* The selection mode used by the flow box.
*/
props[PROP_SELECTION_MODE] =
g_param_spec_enum ("selection-mode",
P_("Selection mode"),
P_("The selection mode"),
GTK_TYPE_SELECTION_MODE,
GTK_SELECTION_SINGLE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:activate-on-single-click:
*
* Determines whether children can be activated with a single
* click, or require a double-click.
*/
props[PROP_ACTIVATE_ON_SINGLE_CLICK] =
g_param_spec_boolean ("activate-on-single-click",
P_("Activate on Single Click"),
P_("Activate row on a single click"),
TRUE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:homogeneous:
*
* Determines whether all children should be allocated the
* same size.
*/
props[PROP_HOMOGENEOUS] =
g_param_spec_boolean ("homogeneous",
P_("Homogeneous"),
P_("Whether the children should all be the same size"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:min-children-per-line:
*
* The minimum number of children to allocate consecutively
* in the given orientation.
*
* Setting the minimum children per line ensures
* that a reasonably small height will be requested
* for the overall minimum width of the box.
*/
props[PROP_MIN_CHILDREN_PER_LINE] =
g_param_spec_uint ("min-children-per-line",
P_("Minimum Children Per Line"),
P_("The minimum number of children to allocate "
"consecutively in the given orientation."),
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:max-children-per-line:
*
* The maximum amount of children to request space for consecutively
* in the given orientation.
*/
props[PROP_MAX_CHILDREN_PER_LINE] =
g_param_spec_uint ("max-children-per-line",
P_("Maximum Children Per Line"),
P_("The maximum amount of children to request space for "
"consecutively in the given orientation."),
0, G_MAXUINT, DEFAULT_MAX_CHILDREN_PER_LINE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:row-spacing:
*
* The amount of vertical space between two children.
*/
props[PROP_ROW_SPACING] =
g_param_spec_uint ("row-spacing",
P_("Vertical spacing"),
P_("The amount of vertical space between two children"),
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFlowBox:column-spacing:
*
* The amount of horizontal space between two children.
*/
props[PROP_COLUMN_SPACING] =
g_param_spec_uint ("column-spacing",
P_("Horizontal spacing"),
P_("The amount of horizontal space between two children"),
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, LAST_PROP, props);
/**
* GtkFlowBox::child-activated:
* @box: the #GtkFlowBox on which the signal is emitted
* @child: the child that is activated
*
* The ::child-activated signal is emitted when a child has been
* activated by the user.
*/
signals[CHILD_ACTIVATED] = g_signal_new ("child-activated",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkFlowBoxClass, child_activated),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_FLOW_BOX_CHILD);
/**
* GtkFlowBox::selected-children-changed:
* @box: the #GtkFlowBox on wich the signal is emitted
*
* The ::selected-children-changed signal is emitted when the
* set of selected children changes.
*
* Use gtk_flow_box_selected_foreach() or
* gtk_flow_box_get_selected_children() to obtain the
* selected children.
*/
signals[SELECTED_CHILDREN_CHANGED] = g_signal_new ("selected-children-changed",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkFlowBoxClass, selected_children_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkFlowBox::activate-cursor-child:
* @box: the #GtkFlowBox on which the signal is emitted
*
* The ::activate-cursor-child signal is a
* [keybinding signal][GtkBindingSignal]
* which gets emitted when the user activates the @box.
*/
signals[ACTIVATE_CURSOR_CHILD] = g_signal_new ("activate-cursor-child",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxClass, activate_cursor_child),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkFlowBox::toggle-cursor-child:
* @box: the #GtkFlowBox on which the signal is emitted
*
* The ::toggle-cursor-child signal is a
* [keybinding signal][GtkBindingSignal]
* which toggles the selection of the child that has the focus.
*
* The default binding for this signal is Ctrl-Space.
*/
signals[TOGGLE_CURSOR_CHILD] = g_signal_new ("toggle-cursor-child",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxClass, toggle_cursor_child),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkFlowBox::move-cursor:
* @box: the #GtkFlowBox on which the signal is emitted
* @step: the granularity fo the move, as a #GtkMovementStep
* @count: the number of @step units to move
*
* The ::move-cursor signal is a
* [keybinding signal][GtkBindingSignal]
* which gets emitted when the user initiates a cursor movement.
* If the cursor is not visible in @text_view, this signal causes
* the viewport to be moved instead.
*
* Applications should not connect to it, but may emit it with
* g_signal_emit_by_name() if they need to control the cursor
* programmatically.
*
* The default bindings for this signal come in two variants,
* the variant with the Shift modifier extends the selection,
* the variant without the Shift modifer does not.
* There are too many key combinations to list them all here.
* - Arrow keys move by individual children
* - Home/End keys move to the ends of the box
* - PageUp/PageDown keys move vertically by pages
*/
signals[MOVE_CURSOR] = g_signal_new ("move-cursor",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxClass, move_cursor),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT,
G_TYPE_NONE, 2,
GTK_TYPE_MOVEMENT_STEP, G_TYPE_INT);
/**
* GtkFlowBox::select-all:
* @box: the #GtkFlowBox on which the signal is emitted
*
* The ::select-all signal is a
* [keybinding signal][GtkBindingSignal]
* which gets emitted to select all children of the box, if
* the selection mode permits it.
*
* The default bindings for this signal is Ctrl-a.
*/
signals[SELECT_ALL] = g_signal_new ("select-all",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxClass, select_all),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkFlowBox::unselect-all:
* @box: the #GtkFlowBox on which the signal is emitted
*
* The ::unselect-all signal is a
* [keybinding signal][GtkBindingSignal]
* which gets emitted to unselect all children of the box, if
* the selection mode permits it.
*
* The default bindings for this signal is Ctrl-Shift-a.
*/
signals[UNSELECT_ALL] = g_signal_new ("unselect-all",
GTK_TYPE_FLOW_BOX,
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkFlowBoxClass, unselect_all),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_class->activate_signal = signals[ACTIVATE_CURSOR_CHILD];
binding_set = gtk_binding_set_by_class (class);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Home, 0,
GTK_MOVEMENT_BUFFER_ENDS, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Home, 0,
GTK_MOVEMENT_BUFFER_ENDS, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_End, 0,
GTK_MOVEMENT_BUFFER_ENDS, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_End, 0,
GTK_MOVEMENT_BUFFER_ENDS, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Up, 0,
GTK_MOVEMENT_DISPLAY_LINES, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Up, 0,
GTK_MOVEMENT_DISPLAY_LINES, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Down, 0,
GTK_MOVEMENT_DISPLAY_LINES, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Down, 0,
GTK_MOVEMENT_DISPLAY_LINES, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Page_Up, 0,
GTK_MOVEMENT_PAGES, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0,
GTK_MOVEMENT_PAGES, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Page_Down, 0,
GTK_MOVEMENT_PAGES, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0,
GTK_MOVEMENT_PAGES, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
gtk_flow_box_add_move_binding (binding_set, GDK_KEY_KP_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, GDK_CONTROL_MASK,
"toggle-cursor-child", 0, NULL);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, GDK_CONTROL_MASK,
"toggle-cursor-child", 0, NULL);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK,
"select-all", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
"unselect-all", 0);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_FLOW_BOX_ACCESSIBLE);
}
static void
gtk_flow_box_init (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
gtk_widget_set_has_window (GTK_WIDGET (box), TRUE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (box), TRUE);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->selection_mode = GTK_SELECTION_SINGLE;
priv->max_children_per_line = DEFAULT_MAX_CHILDREN_PER_LINE;
priv->column_spacing = 0;
priv->row_spacing = 0;
priv->activate_on_single_click = TRUE;
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (box));
priv->children = g_sequence_new (NULL);
priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (box));
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->multipress_gesture),
FALSE);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->multipress_gesture),
GDK_BUTTON_PRIMARY);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->multipress_gesture),
GTK_PHASE_BUBBLE);
g_signal_connect (priv->multipress_gesture, "pressed",
G_CALLBACK (gtk_flow_box_multipress_gesture_pressed), box);
g_signal_connect (priv->multipress_gesture, "released",
G_CALLBACK (gtk_flow_box_multipress_gesture_released), box);
priv->drag_gesture = gtk_gesture_drag_new (GTK_WIDGET (box));
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->drag_gesture),
FALSE);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->drag_gesture),
GDK_BUTTON_PRIMARY);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->drag_gesture),
GTK_PHASE_CAPTURE);
g_signal_connect (priv->drag_gesture, "drag-begin",
G_CALLBACK (gtk_flow_box_drag_gesture_begin), box);
g_signal_connect (priv->drag_gesture, "drag-update",
G_CALLBACK (gtk_flow_box_drag_gesture_update), box);
g_signal_connect (priv->drag_gesture, "drag-end",
G_CALLBACK (gtk_flow_box_drag_gesture_end), box);
}
/* Public API {{{2 */
/**
* gtk_flow_box_new:
*
* Creates a GtkFlowBox.
*
* Returns: a new #GtkFlowBox container
*
* Since: 3.12
*/
GtkWidget *
gtk_flow_box_new (void)
{
return (GtkWidget *)g_object_new (GTK_TYPE_FLOW_BOX, NULL);
}
static void
gtk_flow_box_insert_css_node (GtkFlowBox *box,
GtkWidget *child,
GSequenceIter *iter)
{
GSequenceIter *prev_iter;
GtkWidget *sibling;
prev_iter = g_sequence_iter_prev (iter);
if (prev_iter != iter)
{
sibling = g_sequence_get (prev_iter);
gtk_css_node_insert_after (gtk_widget_get_css_node (GTK_WIDGET (box)),
gtk_widget_get_css_node (child),
gtk_widget_get_css_node (sibling));
}
}
/**
* gtk_flow_box_insert:
* @box: a #GtkFlowBox
* @widget: the #GtkWidget to add
* @position: the position to insert @child in
*
* Inserts the @widget into @box at @position.
*
* If a sort function is set, the widget will actually be inserted
* at the calculated position and this function has the same effect
* as gtk_container_add().
*
* If @position is -1, or larger than the total number of children
* in the @box, then the @widget will be appended to the end.
*
* Since: 3.12
*/
void
gtk_flow_box_insert (GtkFlowBox *box,
GtkWidget *widget,
gint position)
{
GtkFlowBoxPrivate *priv;
GtkFlowBoxChild *child;
GSequenceIter *iter;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = BOX_PRIV (box);
if (GTK_IS_FLOW_BOX_CHILD (widget))
child = GTK_FLOW_BOX_CHILD (widget);
else
{
child = GTK_FLOW_BOX_CHILD (gtk_flow_box_child_new ());
gtk_widget_show (GTK_WIDGET (child));
gtk_container_add (GTK_CONTAINER (child), widget);
}
if (priv->sort_func != NULL)
iter = g_sequence_insert_sorted (priv->children, child,
(GCompareDataFunc)gtk_flow_box_sort, box);
else if (position == 0)
iter = g_sequence_prepend (priv->children, child);
else if (position == -1)
iter = g_sequence_append (priv->children, child);
else
{
GSequenceIter *pos;
pos = g_sequence_get_iter_at_pos (priv->children, position);
iter = g_sequence_insert_before (pos, child);
}
gtk_flow_box_insert_css_node (box, GTK_WIDGET (child), iter);
CHILD_PRIV (child)->iter = iter;
gtk_widget_set_parent (GTK_WIDGET (child), GTK_WIDGET (box));
gtk_flow_box_apply_filter (box, child);
}
/**
* gtk_flow_box_get_child_at_index:
* @box: a #GtkFlowBox
* @idx: the position of the child
*
* Gets the nth child in the @box.
*
* Returns: (transfer none): the child widget, which will
* always be a #GtkFlowBoxChild
*
* Since: 3.12
*/
GtkFlowBoxChild *
gtk_flow_box_get_child_at_index (GtkFlowBox *box,
gint idx)
{
GSequenceIter *iter;
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), NULL);
iter = g_sequence_get_iter_at_pos (BOX_PRIV (box)->children, idx);
if (iter)
return g_sequence_get (iter);
return NULL;
}
/**
* gtk_flow_box_set_hadjustment:
* @box: a #GtkFlowBox
* @adjustment: an adjustment which should be adjusted
* when the focus is moved among the descendents of @container
*
* Hooks up an adjustment to focus handling in @box.
* The adjustment is also used for autoscrolling during
* rubberband selection. See gtk_scrolled_window_get_hadjustment()
* for a typical way of obtaining the adjustment, and
* gtk_flow_box_set_vadjustment()for setting the vertical
* adjustment.
*
* The adjustments have to be in pixel units and in the same
* coordinate system as the allocation for immediate children
* of the box.
*
* Since: 3.12
*/
void
gtk_flow_box_set_hadjustment (GtkFlowBox *box,
GtkAdjustment *adjustment)
{
GtkFlowBoxPrivate *priv;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
priv = BOX_PRIV (box);
g_object_ref (adjustment);
if (priv->hadjustment)
g_object_unref (priv->hadjustment);
priv->hadjustment = adjustment;
gtk_container_set_focus_hadjustment (GTK_CONTAINER (box), adjustment);
}
/**
* gtk_flow_box_set_vadjustment:
* @box: a #GtkFlowBox
* @adjustment: an adjustment which should be adjusted
* when the focus is moved among the descendents of @container
*
* Hooks up an adjustment to focus handling in @box.
* The adjustment is also used for autoscrolling during
* rubberband selection. See gtk_scrolled_window_get_vadjustment()
* for a typical way of obtaining the adjustment, and
* gtk_flow_box_set_hadjustment()for setting the horizontal
* adjustment.
*
* The adjustments have to be in pixel units and in the same
* coordinate system as the allocation for immediate children
* of the box.
*
* Since: 3.12
*/
void
gtk_flow_box_set_vadjustment (GtkFlowBox *box,
GtkAdjustment *adjustment)
{
GtkFlowBoxPrivate *priv;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
priv = BOX_PRIV (box);
g_object_ref (adjustment);
if (priv->vadjustment)
g_object_unref (priv->vadjustment);
priv->vadjustment = adjustment;
gtk_container_set_focus_vadjustment (GTK_CONTAINER (box), adjustment);
}
/* Setters and getters {{{2 */
/**
* gtk_flow_box_get_homogeneous:
* @box: a #GtkFlowBox
*
* Returns whether the box is homogeneous (all children are the
* same size). See gtk_box_set_homogeneous().
*
* Returns: %TRUE if the box is homogeneous.
*
* Since: 3.12
*/
gboolean
gtk_flow_box_get_homogeneous (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->homogeneous;
}
/**
* gtk_flow_box_set_homogeneous:
* @box: a #GtkFlowBox
* @homogeneous: %TRUE to create equal allotments,
* %FALSE for variable allotments
*
* Sets the #GtkFlowBox:homogeneous property of @box, controlling
* whether or not all children of @box are given equal space
* in the box.
*
* Since: 3.12
*/
void
gtk_flow_box_set_homogeneous (GtkFlowBox *box,
gboolean homogeneous)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
homogeneous = homogeneous != FALSE;
if (BOX_PRIV (box)->homogeneous != homogeneous)
{
BOX_PRIV (box)->homogeneous = homogeneous;
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_HOMOGENEOUS]);
gtk_widget_queue_resize (GTK_WIDGET (box));
}
}
/**
* gtk_flow_box_set_row_spacing:
* @box: a #GtkFlowBox
* @spacing: the spacing to use
*
* Sets the vertical space to add between children.
* See the #GtkFlowBox:row-spacing property.
*
* Since: 3.12
*/
void
gtk_flow_box_set_row_spacing (GtkFlowBox *box,
guint spacing)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->row_spacing != spacing)
{
BOX_PRIV (box)->row_spacing = spacing;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_ROW_SPACING]);
}
}
/**
* gtk_flow_box_get_row_spacing:
* @box: a #GtkFlowBox
*
* Gets the vertical spacing.
*
* Returns: the vertical spacing
*
* Since: 3.12
*/
guint
gtk_flow_box_get_row_spacing (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->row_spacing;
}
/**
* gtk_flow_box_set_column_spacing:
* @box: a #GtkFlowBox
* @spacing: the spacing to use
*
* Sets the horizontal space to add between children.
* See the #GtkFlowBox:column-spacing property.
*
* Since: 3.12
*/
void
gtk_flow_box_set_column_spacing (GtkFlowBox *box,
guint spacing)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->column_spacing != spacing)
{
BOX_PRIV (box)->column_spacing = spacing;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_COLUMN_SPACING]);
}
}
/**
* gtk_flow_box_get_column_spacing:
* @box: a #GtkFlowBox
*
* Gets the horizontal spacing.
*
* Returns: the horizontal spacing
*
* Since: 3.12
*/
guint
gtk_flow_box_get_column_spacing (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->column_spacing;
}
/**
* gtk_flow_box_set_min_children_per_line:
* @box: a #GtkFlowBox
* @n_children: the minimum number of children per line
*
* Sets the minimum number of children to line up
* in @box’s orientation before flowing.
*
* Since: 3.12
*/
void
gtk_flow_box_set_min_children_per_line (GtkFlowBox *box,
guint n_children)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->min_children_per_line != n_children)
{
BOX_PRIV (box)->min_children_per_line = n_children;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_MIN_CHILDREN_PER_LINE]);
}
}
/**
* gtk_flow_box_get_min_children_per_line:
* @box: a #GtkFlowBox
*
* Gets the minimum number of children per line.
*
* Returns: the minimum number of children per line
*
* Since: 3.12
*/
guint
gtk_flow_box_get_min_children_per_line (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->min_children_per_line;
}
/**
* gtk_flow_box_set_max_children_per_line:
* @box: a #GtkFlowBox
* @n_children: the maximum number of children per line
*
* Sets the maximum number of children to request and
* allocate space for in @box’s orientation.
*
* Setting the maximum number of children per line
* limits the overall natural size request to be no more
* than @n_children children long in the given orientation.
*
* Since: 3.12
*/
void
gtk_flow_box_set_max_children_per_line (GtkFlowBox *box,
guint n_children)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->max_children_per_line != n_children)
{
BOX_PRIV (box)->max_children_per_line = n_children;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_MAX_CHILDREN_PER_LINE]);
}
}
/**
* gtk_flow_box_get_max_children_per_line:
* @box: a #GtkFlowBox
*
* Gets the maximum number of children per line.
*
* Returns: the maximum number of children per line
*
* Since: 3.12
*/
guint
gtk_flow_box_get_max_children_per_line (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->max_children_per_line;
}
/**
* gtk_flow_box_set_activate_on_single_click:
* @box: a #GtkFlowBox
* @single: %TRUE to emit child-activated on a single click
*
* If @single is %TRUE, children will be activated when you click
* on them, otherwise you need to double-click.
*
* Since: 3.12
*/
void
gtk_flow_box_set_activate_on_single_click (GtkFlowBox *box,
gboolean single)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
single = single != FALSE;
if (BOX_PRIV (box)->activate_on_single_click != single)
{
BOX_PRIV (box)->activate_on_single_click = single;
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_ACTIVATE_ON_SINGLE_CLICK]);
}
}
/**
* gtk_flow_box_get_activate_on_single_click:
* @box: a #GtkFlowBox
*
* Returns whether children activate on single clicks.
*
* Returns: %TRUE if children are activated on single click,
* %FALSE otherwise
*
* Since: 3.12
*/
gboolean
gtk_flow_box_get_activate_on_single_click (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), FALSE);
return BOX_PRIV (box)->activate_on_single_click;
}
/* Selection handling {{{2 */
/**
* gtk_flow_box_get_selected_children:
* @box: a #GtkFlowBox
*
* Creates a list of all selected children.
*
* Returns: (element-type GtkFlowBoxChild) (transfer container):
* A #GList containing the #GtkWidget for each selected child.
* Free with g_list_free() when done.
*
* Since: 3.12
*/
GList *
gtk_flow_box_get_selected_children (GtkFlowBox *box)
{
GtkFlowBoxChild *child;
GSequenceIter *iter;
GList *selected = NULL;
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), NULL);
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
child = g_sequence_get (iter);
if (CHILD_PRIV (child)->selected)
selected = g_list_prepend (selected, child);
}
return g_list_reverse (selected);
}
/**
* gtk_flow_box_select_child:
* @box: a #GtkFlowBox
* @child: a child of @box
*
* Selects a single child of @box, if the selection
* mode allows it.
*
* Since: 3.12
*/
void
gtk_flow_box_select_child (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
g_return_if_fail (GTK_IS_FLOW_BOX_CHILD (child));
gtk_flow_box_select_child_internal (box, child);
}
/**
* gtk_flow_box_unselect_child:
* @box: a #GtkFlowBox
* @child: a child of @box
*
* Unselects a single child of @box, if the selection
* mode allows it.
*
* Since: 3.12
*/
void
gtk_flow_box_unselect_child (GtkFlowBox *box,
GtkFlowBoxChild *child)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
g_return_if_fail (GTK_IS_FLOW_BOX_CHILD (child));
gtk_flow_box_unselect_child_internal (box, child);
}
/**
* gtk_flow_box_select_all:
* @box: a #GtkFlowBox
*
* Select all children of @box, if the selection
* mode allows it.
*
* Since: 3.12
*/
void
gtk_flow_box_select_all (GtkFlowBox *box)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->selection_mode != GTK_SELECTION_MULTIPLE)
return;
if (g_sequence_get_length (BOX_PRIV (box)->children) > 0)
{
gtk_flow_box_select_all_between (box, NULL, NULL, FALSE);
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
}
/**
* gtk_flow_box_unselect_all:
* @box: a #GtkFlowBox
*
* Unselect all children of @box, if the selection
* mode allows it.
*
* Since: 3.12
*/
void
gtk_flow_box_unselect_all (GtkFlowBox *box)
{
gboolean dirty = FALSE;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->selection_mode == GTK_SELECTION_BROWSE)
return;
dirty = gtk_flow_box_unselect_all_internal (box);
if (dirty)
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
/**
* GtkFlowBoxForeachFunc:
* @box: a #GtkFlowBox
* @child: a #GtkFlowBoxChild
* @user_data: (closure): user data
*
* A function used by gtk_flow_box_selected_foreach().
* It will be called on every selected child of the @box.
*
* Since: 3.12
*/
/**
* gtk_flow_box_selected_foreach:
* @box: a #GtkFlowBox
* @func: (scope call): the function to call for each selected child
* @data: user data to pass to the function
*
* Calls a function for each selected child.
*
* Note that the selection cannot be modified from within
* this function.
*
* Since: 3.12
*/
void
gtk_flow_box_selected_foreach (GtkFlowBox *box,
GtkFlowBoxForeachFunc func,
gpointer data)
{
GtkFlowBoxChild *child;
GSequenceIter *iter;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
child = g_sequence_get (iter);
if (CHILD_PRIV (child)->selected)
(*func) (box, child, data);
}
}
/**
* gtk_flow_box_set_selection_mode:
* @box: a #GtkFlowBox
* @mode: the new selection mode
*
* Sets how selection works in @box.
* See #GtkSelectionMode for details.
*
* Since: 3.12
*/
void
gtk_flow_box_set_selection_mode (GtkFlowBox *box,
GtkSelectionMode mode)
{
gboolean dirty = FALSE;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (mode == BOX_PRIV (box)->selection_mode)
return;
if (mode == GTK_SELECTION_NONE ||
BOX_PRIV (box)->selection_mode == GTK_SELECTION_MULTIPLE)
{
dirty = gtk_flow_box_unselect_all_internal (box);
BOX_PRIV (box)->selected_child = NULL;
}
BOX_PRIV (box)->selection_mode = mode;
g_object_notify_by_pspec (G_OBJECT (box), props[PROP_SELECTION_MODE]);
if (dirty)
g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
}
/**
* gtk_flow_box_get_selection_mode:
* @box: a #GtkFlowBox
*
* Gets the selection mode of @box.
*
* Returns: the #GtkSelectionMode
*
* Since: 3.12
*/
GtkSelectionMode
gtk_flow_box_get_selection_mode (GtkFlowBox *box)
{
g_return_val_if_fail (GTK_IS_FLOW_BOX (box), GTK_SELECTION_SINGLE);
return BOX_PRIV (box)->selection_mode;
}
/* Filtering {{{2 */
/**
* GtkFlowBoxFilterFunc:
* @child: a #GtkFlowBoxChild that may be filtered
* @user_data: (closure): user data
*
* A function that will be called whenrever a child changes
* or is added. It lets you control if the child should be
* visible or not.
*
* Returns: %TRUE if the row should be visible, %FALSE otherwise
*
* Since: 3.12
*/
/**
* gtk_flow_box_set_filter_func:
* @box: a #GtkFlowBox
* @filter_func: (closure user_data) (allow-none): callback that
* lets you filter which children to show
* @user_data: user data passed to @filter_func
* @destroy: destroy notifier for @user_data
*
* By setting a filter function on the @box one can decide dynamically
* which of the children to show. For instance, to implement a search
* function that only shows the children matching the search terms.
*
* The @filter_func will be called for each child after the call, and
* it will continue to be called each time a child changes (via
* gtk_flow_box_child_changed()) or when gtk_flow_box_invalidate_filter()
* is called.
*
* Since: 3.12
*/
void
gtk_flow_box_set_filter_func (GtkFlowBox *box,
GtkFlowBoxFilterFunc filter_func,
gpointer user_data,
GDestroyNotify destroy)
{
GtkFlowBoxPrivate *priv;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
priv = BOX_PRIV (box);
if (priv->filter_destroy != NULL)
priv->filter_destroy (priv->filter_data);
priv->filter_func = filter_func;
priv->filter_data = user_data;
priv->filter_destroy = destroy;
gtk_flow_box_apply_filter_all (box);
}
/**
* gtk_flow_box_invalidate_filter:
* @box: a #GtkFlowBox
*
* Updates the filtering for all children.
*
* Call this function when the result of the filter
* function on the @box is changed due ot an external
* factor. For instance, this would be used if the
* filter function just looked for a specific search
* term, and the entry with the string has changed.
*
* Since: 3.12
*/
void
gtk_flow_box_invalidate_filter (GtkFlowBox *box)
{
g_return_if_fail (GTK_IS_FLOW_BOX (box));
if (BOX_PRIV (box)->filter_func != NULL)
gtk_flow_box_apply_filter_all (box);
}
/* Sorting {{{2 */
/**
* GtkFlowBoxSortFunc:
* @child1: the first child
* @child2: the second child
* @user_data: (closure): user data
*
* A function to compare two children to determine which
* should come first.
*
* Returns: < 0 if @child1 should be before @child2, 0 if
* the are equal, and > 0 otherwise
*
* Since: 3.12
*/
/**
* gtk_flow_box_set_sort_func:
* @box: a #GtkFlowBox
* @sort_func: (closure user_data) (allow-none): the sort function
* @user_data: user data passed to @sort_func
* @destroy: destroy notifier for @user_data
*
* By setting a sort function on the @box, one can dynamically
* reorder the children of the box, based on the contents of
* the children.
*
* The @sort_func will be called for each child after the call,
* and will continue to be called each time a child changes (via
* gtk_flow_box_child_changed()) and when gtk_flow_box_invalidate_sort()
* is called.
*
* Since: 3.12
*/
void
gtk_flow_box_set_sort_func (GtkFlowBox *box,
GtkFlowBoxSortFunc sort_func,
gpointer user_data,
GDestroyNotify destroy)
{
GtkFlowBoxPrivate *priv;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
priv = BOX_PRIV (box);
if (priv->sort_destroy != NULL)
priv->sort_destroy (priv->sort_data);
priv->sort_func = sort_func;
priv->sort_data = user_data;
priv->sort_destroy = destroy;
gtk_flow_box_invalidate_sort (box);
}
static gint
gtk_flow_box_sort (GtkFlowBoxChild *a,
GtkFlowBoxChild *b,
GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv = BOX_PRIV (box);
return priv->sort_func (a, b, priv->sort_data);
}
static void
gtk_flow_box_css_node_foreach (gpointer data,
gpointer user_data)
{
GtkWidget **previous = user_data;
GtkWidget *row = data;
GtkCssNode *row_node;
GtkCssNode *prev_node;
if (*previous)
{
prev_node = gtk_widget_get_css_node (*previous);
row_node = gtk_widget_get_css_node (row);
gtk_css_node_insert_after (gtk_css_node_get_parent (row_node),
row_node,
prev_node);
}
*previous = row;
}
/**
* gtk_flow_box_invalidate_sort:
* @box: a #GtkFlowBox
*
* Updates the sorting for all children.
*
* Call this when the result of the sort function on
* @box is changed due to an external factor.
*
* Since: 3.12
*/
void
gtk_flow_box_invalidate_sort (GtkFlowBox *box)
{
GtkFlowBoxPrivate *priv;
GtkWidget *previous = NULL;
g_return_if_fail (GTK_IS_FLOW_BOX (box));
priv = BOX_PRIV (box);
if (priv->sort_func != NULL)
{
g_sequence_sort (priv->children, (GCompareDataFunc)gtk_flow_box_sort, box);
g_sequence_foreach (priv->children, gtk_flow_box_css_node_foreach, &previous);
gtk_widget_queue_resize (GTK_WIDGET (box));
}
}
/* vim:set foldmethod=marker expandtab: */