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gtk2/gtk/gtkwrapbox.c
Tristan Van Berkom e976abe825 Split up GtkWrapBox:spreading property into two orientation specific properties. 
Now GtkWrapBox has "horizontal-spreading" and "vertical-spreading" options,
before GtkWrapBox never spread out children across the opposing orientation
(i.e. it never grew "lines" larger then their natural width, they would
act as if set to GTK_WRAP_BOX_SPREAD_START, now they are completely configurable).
2010-09-21 22:00:54 +09:00

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/* gtkwrapbox.c
* Copyright (C) 2007-2010 Openismus GmbH
*
* Authors:
* Tristan Van Berkom <tristanvb@openismus.com>
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gtkwrapbox
* @Short_Description: A container that wraps its children;
* @Title: GtkWrapBox
*
* #GtkWrapBox allocates space for an ordered list of children
* by wrapping them over in the box's orentation.
*
*/
#include "config.h"
#include "gtksizerequest.h"
#include "gtkorientable.h"
#include "gtkwrapbox.h"
#include "gtkprivate.h"
#include "gtkintl.h"
typedef struct _GtkWrapBoxChild GtkWrapBoxChild;
enum {
PROP_0,
PROP_ORIENTATION,
PROP_ALLOCATION_MODE,
PROP_HORIZONTAL_SPREADING,
PROP_VERTICAL_SPREADING,
PROP_HORIZONTAL_SPACING,
PROP_VERTICAL_SPACING,
PROP_MINIMUM_LINE_CHILDREN,
PROP_NATURAL_LINE_CHILDREN
};
enum
{
CHILD_PROP_0,
CHILD_PROP_PACKING
};
struct _GtkWrapBoxPrivate
{
GtkOrientation orientation;
GtkWrapAllocationMode mode;
GtkWrapBoxSpreading horizontal_spreading;
GtkWrapBoxSpreading vertical_spreading;
guint16 vertical_spacing;
guint16 horizontal_spacing;
guint16 minimum_line_children;
guint16 natural_line_children;
GList *children;
};
struct _GtkWrapBoxChild
{
GtkWidget *widget;
GtkWrapBoxPacking packing;
};
/* GObjectClass */
static void gtk_wrap_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_wrap_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
/* GtkWidgetClass */
static void gtk_wrap_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
/* GtkContainerClass */
static void gtk_wrap_box_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_wrap_box_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_wrap_box_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_wrap_box_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_wrap_box_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static GType gtk_wrap_box_child_type (GtkContainer *container);
/* GtkSizeRequest */
static void gtk_wrap_box_size_request_init (GtkSizeRequestIface *iface);
static GtkSizeRequestMode gtk_wrap_box_get_request_mode (GtkSizeRequest *widget);
static void gtk_wrap_box_get_width (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_wrap_box_get_height (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_wrap_box_get_height_for_width (GtkSizeRequest *box,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_wrap_box_get_width_for_height (GtkSizeRequest *box,
gint width,
gint *minimum_height,
gint *natural_height);
G_DEFINE_TYPE_WITH_CODE (GtkWrapBox, gtk_wrap_box, GTK_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (GTK_TYPE_SIZE_REQUEST,
gtk_wrap_box_size_request_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
#define ORIENTATION_SPREADING(box) \
(((GtkWrapBox *)(box))->priv->orientation == GTK_ORIENTATION_HORIZONTAL ? \
((GtkWrapBox *)(box))->priv->horizontal_spreading : \
((GtkWrapBox *)(box))->priv->vertical_spreading)
#define OPPOSING_ORIENTATION_SPREADING(box) \
(((GtkWrapBox *)(box))->priv->orientation == GTK_ORIENTATION_HORIZONTAL ? \
((GtkWrapBox *)(box))->priv->vertical_spreading : \
((GtkWrapBox *)(box))->priv->horizontal_spreading)
static void
gtk_wrap_box_class_init (GtkWrapBoxClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
gobject_class->get_property = gtk_wrap_box_get_property;
gobject_class->set_property = gtk_wrap_box_set_property;
widget_class->size_allocate = gtk_wrap_box_size_allocate;
container_class->add = gtk_wrap_box_add;
container_class->remove = gtk_wrap_box_remove;
container_class->forall = gtk_wrap_box_forall;
container_class->child_type = gtk_wrap_box_child_type;
container_class->set_child_property = gtk_wrap_box_set_child_property;
container_class->get_child_property = gtk_wrap_box_get_child_property;
gtk_container_class_handle_border_width (container_class);
/* GObjectClass properties */
g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
/**
* GtkWrapBox:allocation-mode:
*
* The #GtkWrapAllocationMode to use.
*/
g_object_class_install_property (gobject_class,
PROP_ALLOCATION_MODE,
g_param_spec_enum ("allocation-mode",
P_("Allocation Mode"),
P_("The allocation mode to use"),
GTK_TYPE_WRAP_ALLOCATION_MODE,
GTK_WRAP_ALLOCATE_FREE,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:horizontal-spreading:
*
* The #GtkWrapBoxSpreading to used to define what is done with extra
* space in a given orientation.
*/
g_object_class_install_property (gobject_class,
PROP_HORIZONTAL_SPREADING,
g_param_spec_enum ("horizontal-spreading",
P_("Horizontal Spreading"),
P_("The spreading mode to use horizontally"),
GTK_TYPE_WRAP_BOX_SPREADING,
GTK_WRAP_BOX_SPREAD_START,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:vertical-spreading:
*
* The #GtkWrapBoxSpreading to used to define what is done with extra
* space in a given orientation.
*/
g_object_class_install_property (gobject_class,
PROP_VERTICAL_SPREADING,
g_param_spec_enum ("vertical-spreading",
P_("Vertical Spreading"),
P_("The spreading mode to use vertically"),
GTK_TYPE_WRAP_BOX_SPREADING,
GTK_WRAP_BOX_SPREAD_START,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:minimum-line-children:
*
* The minimum number of children to allocate consecutively in the given orientation.
*
* <note><para>Setting the minimum children per line ensures
* that a reasonably small height will be requested
* for the overall minimum width of the box.</para></note>
*
*/
g_object_class_install_property (gobject_class,
PROP_MINIMUM_LINE_CHILDREN,
g_param_spec_uint ("minimum-line-children",
P_("Minimum Line Children"),
P_("The minimum number of children to allocate "
"consecutively in the given orientation."),
0,
65535,
0,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:natural-line-children:
*
* The maximum amount of children to request space for consecutively in the given orientation.
*
*/
g_object_class_install_property (gobject_class,
PROP_NATURAL_LINE_CHILDREN,
g_param_spec_uint ("natural-line-children",
P_("Natural Line Children"),
P_("The maximum amount of children to request space for "
"consecutively in the given orientation."),
0,
65535,
0,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:vertical-spacing:
*
* The amount of vertical space between two children.
*
*/
g_object_class_install_property (gobject_class,
PROP_VERTICAL_SPACING,
g_param_spec_uint ("vertical-spacing",
P_("Vertical spacing"),
P_("The amount of vertical space between two children"),
0,
65535,
0,
GTK_PARAM_READWRITE));
/**
* GtkWrapBox:horizontal-spacing:
*
* The amount of horizontal space between two children.
*
*/
g_object_class_install_property (gobject_class,
PROP_HORIZONTAL_SPACING,
g_param_spec_uint ("horizontal-spacing",
P_("Horizontal spacing"),
P_("The amount of horizontal space between two children"),
0,
65535,
0,
GTK_PARAM_READWRITE));
/* GtkContainerClass child properties */
/**
* GtkWrapBox:packing:
*
* The #GtkWrapBoxPacking options to specify how to pack a child into the box.
*/
gtk_container_class_install_child_property (container_class,
CHILD_PROP_PACKING,
g_param_spec_flags
("packing",
P_("Packing"),
P_("The packing options to use for this child"),
GTK_TYPE_WRAP_BOX_PACKING, 0,
GTK_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkWrapBoxPrivate));
}
static void
gtk_wrap_box_init (GtkWrapBox *box)
{
GtkWrapBoxPrivate *priv;
box->priv = priv =
G_TYPE_INSTANCE_GET_PRIVATE (box, GTK_TYPE_WRAP_BOX, GtkWrapBoxPrivate);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->mode = GTK_WRAP_ALLOCATE_FREE;
priv->horizontal_spreading = GTK_WRAP_BOX_SPREAD_START;
priv->vertical_spreading = GTK_WRAP_BOX_SPREAD_START;
priv->horizontal_spacing = 0;
priv->vertical_spacing = 0;
priv->children = NULL;
gtk_widget_set_has_window (GTK_WIDGET (box), FALSE);
}
/*****************************************************
* GObectClass *
*****************************************************/
static void
gtk_wrap_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkWrapBox *box = GTK_WRAP_BOX (object);
GtkWrapBoxPrivate *priv = box->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_boolean (value, priv->orientation);
break;
case PROP_ALLOCATION_MODE:
g_value_set_enum (value, priv->mode);
break;
case PROP_HORIZONTAL_SPREADING:
g_value_set_enum (value, priv->horizontal_spreading);
break;
case PROP_VERTICAL_SPREADING:
g_value_set_enum (value, priv->vertical_spreading);
break;
case PROP_HORIZONTAL_SPACING:
g_value_set_uint (value, priv->horizontal_spacing);
break;
case PROP_VERTICAL_SPACING:
g_value_set_uint (value, priv->vertical_spacing);
break;
case PROP_MINIMUM_LINE_CHILDREN:
g_value_set_uint (value, priv->minimum_line_children);
break;
case PROP_NATURAL_LINE_CHILDREN:
g_value_set_uint (value, priv->natural_line_children);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_wrap_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWrapBox *box = GTK_WRAP_BOX (object);
GtkWrapBoxPrivate *priv = box->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
priv->orientation = g_value_get_enum (value);
/* Re-box the children in the new orientation */
gtk_widget_queue_resize (GTK_WIDGET (box));
break;
case PROP_ALLOCATION_MODE:
gtk_wrap_box_set_allocation_mode (box, g_value_get_enum (value));
break;
case PROP_HORIZONTAL_SPREADING:
gtk_wrap_box_set_horizontal_spreading (box, g_value_get_enum (value));
break;
case PROP_VERTICAL_SPREADING:
gtk_wrap_box_set_vertical_spreading (box, g_value_get_enum (value));
break;
case PROP_HORIZONTAL_SPACING:
gtk_wrap_box_set_horizontal_spacing (box, g_value_get_uint (value));
break;
case PROP_VERTICAL_SPACING:
gtk_wrap_box_set_vertical_spacing (box, g_value_get_uint (value));
break;
case PROP_MINIMUM_LINE_CHILDREN:
gtk_wrap_box_set_minimum_line_children (box, g_value_get_uint (value));
break;
case PROP_NATURAL_LINE_CHILDREN:
gtk_wrap_box_set_natural_line_children (box, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*****************************************************
* GtkWidgetClass *
*****************************************************/
static gint
get_visible_children (GtkWrapBox *box)
{
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
gint i = 0;
for (list = priv->children; list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
if (!gtk_widget_get_visible (child->widget))
continue;
i++;
}
return i;
}
static gint
get_visible_expand_children (GtkWrapBox *box,
GtkOrientation orientation,
GList *cursor,
gint n_visible)
{
GList *list;
gint i, expand_children = 0;
for (i = 0, list = cursor; (n_visible > 0 ? i < n_visible : TRUE) && list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
if (!gtk_widget_get_visible (child->widget))
continue;
if ((orientation == GTK_ORIENTATION_HORIZONTAL && (child->packing & GTK_WRAP_BOX_H_EXPAND) != 0) ||
(orientation == GTK_ORIENTATION_VERTICAL && (child->packing & GTK_WRAP_BOX_V_EXPAND) != 0))
expand_children++;
i++;
}
return expand_children;
}
/* Used in columned modes where all items share at least their
* equal widths or heights
*/
static void
get_average_item_size (GtkWrapBox *box,
GtkOrientation orientation,
gint *min_size,
gint *nat_size)
{
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
gint max_min_size = 0;
gint max_nat_size = 0;
for (list = priv->children; list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat;
if (!gtk_widget_get_visible (child->widget))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_width (GTK_SIZE_REQUEST (child->widget),
&child_min, &child_nat);
else
gtk_size_request_get_height (GTK_SIZE_REQUEST (child->widget),
&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 (GtkWrapBox *box,
GtkOrientation orientation,
gint item_size,
gint *min_item_size,
gint *nat_item_size)
{
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
gint max_min_size = 0;
gint max_nat_size = 0;
for (list = priv->children; list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat;
if (!gtk_widget_get_visible (child->widget))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (child->widget),
item_size,
&child_min, &child_nat);
else
gtk_size_request_get_width_for_height (GTK_SIZE_REQUEST (child->widget),
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 itterating over a list of children, note the new index is returned) */
static GList *
get_largest_size_for_line_in_opposing_orientation (GtkWrapBox *box,
GtkOrientation orientation,
GList *cursor,
gint line_length,
GtkRequestedSize *item_sizes,
gint extra_pixels,
gint *min_item_size,
gint *nat_item_size)
{
GList *list;
gint max_min_size = 0;
gint max_nat_size = 0;
gint i;
for (list = cursor, i = 0; list && i < line_length; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat, this_item_size;
if (!gtk_widget_get_visible (child->widget))
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_SPREADING (box) == GTK_WRAP_BOX_SPREAD_EXPAND)
{
this_item_size++;
extra_pixels--;
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (child->widget),
this_item_size,
&child_min, &child_nat);
else
gtk_size_request_get_width_for_height (GTK_SIZE_REQUEST (child->widget),
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 list;
}
/* Gets the largest minimum/natural size on a single line for a given allocated line size
* (used to get the largest line heights for a width in pixels and the opposite
* while itterating over a list of children, note the new index is returned) */
static GList *
get_largest_size_for_free_line_in_opposing_orientation (GtkWrapBox *box,
GtkOrientation orientation,
GList *cursor,
gint min_items,
gint avail_size,
gint *min_item_size,
gint *nat_item_size,
gint *extra_pixels,
GArray **ret_array)
{
GtkWrapBoxPrivate *priv = box->priv;
GtkRequestedSize *sizes;
GList *list;
GArray *array;
gint max_min_size = 0;
gint max_nat_size = 0;
gint i, size = avail_size;
gint line_length, spacing;
gint expand_children = 0;
gint expand_per_child;
gint expand_remainder;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
spacing = priv->horizontal_spacing;
else
spacing = priv->vertical_spacing;
/* First determine the length of this line in items (how many items fit) */
for (i = 0, list = cursor; size > 0 && list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint child_size;
if (!gtk_widget_get_visible (child->widget))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_width (GTK_SIZE_REQUEST (child->widget),
NULL, &child_size);
else
gtk_size_request_get_height (GTK_SIZE_REQUEST (child->widget),
NULL, &child_size);
if (i > 0)
child_size += spacing;
if (size - child_size >= 0)
size -= child_size;
else
break;
i++;
}
line_length = MAX (min_items, i);
size = avail_size;
/* Collect the sizes of the items on this line */
array = g_array_new (0, TRUE, sizeof (GtkRequestedSize));
for (i = 0, list = cursor; i < line_length && list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
GtkRequestedSize requested;
if (!gtk_widget_get_visible (child->widget))
continue;
requested.data = child;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_width (GTK_SIZE_REQUEST (child->widget),
&requested.minimum_size,
&requested.natural_size);
else
gtk_size_request_get_height (GTK_SIZE_REQUEST (child->widget),
&requested.minimum_size,
&requested.natural_size);
if (i > 0)
size -= spacing;
size -= requested.minimum_size;
g_array_append_val (array, requested);
i++;
}
sizes = (GtkRequestedSize *)array->data;
size = gtk_distribute_natural_allocation (size, array->len, sizes);
if (extra_pixels)
*extra_pixels = size;
/* Cut out any expand space if we're not distributing any */
if (ORIENTATION_SPREADING (box) != GTK_WRAP_BOX_SPREAD_EXPAND)
size = 0;
/* Count how many children are going to expand... */
expand_children = get_visible_expand_children (box, orientation,
cursor, line_length);
/* If no child prefers to expand, they all get some expand space */
if (expand_children == 0)
{
expand_per_child = size / line_length;
expand_remainder = size % line_length;
}
else
{
expand_per_child = size / expand_children;
expand_remainder = size % expand_children;
}
/* Now add the remaining expand space and get the collective size of this line
* in the opposing orientation */
for (i = 0, list = cursor; i < line_length && list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat;
if (!gtk_widget_get_visible (child->widget))
continue;
g_assert (child == sizes[i].data);
if ((orientation == GTK_ORIENTATION_HORIZONTAL && (child->packing & GTK_WRAP_BOX_H_EXPAND) != 0) ||
(orientation == GTK_ORIENTATION_VERTICAL && (child->packing & GTK_WRAP_BOX_V_EXPAND) != 0) ||
expand_children == 0)
{
sizes[i].minimum_size += expand_per_child;
if (expand_remainder)
{
sizes[i].minimum_size++;
expand_remainder--;
}
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (child->widget),
sizes[i].minimum_size,
&child_min, &child_nat);
else
gtk_size_request_get_width_for_height (GTK_SIZE_REQUEST (child->widget),
sizes[i].minimum_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 (ret_array)
*ret_array = array;
else
g_array_free (array, TRUE);
if (min_item_size)
*min_item_size = max_min_size;
if (nat_item_size)
*nat_item_size = max_nat_size;
/* Return the next item */
return list;
}
static void
allocate_child (GtkWrapBox *box,
GtkWrapBoxChild *child,
gint item_offset,
gint line_offset,
gint item_size,
gint line_size)
{
GtkWrapBoxPrivate *priv = box->priv;
GtkAllocation widget_allocation;
GtkAllocation child_allocation;
gtk_widget_get_allocation (GTK_WIDGET (box), &widget_allocation);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
child_allocation.x = widget_allocation.x + item_offset;
child_allocation.y = widget_allocation.y + line_offset;
child_allocation.width = item_size;
child_allocation.height = line_size;
}
else /* GTK_ORIENTATION_VERTICAL */
{
child_allocation.x = widget_allocation.x + line_offset;
child_allocation.y = widget_allocation.y + item_offset;
child_allocation.width = line_size;
child_allocation.height = item_size;
}
gtk_widget_size_allocate (child->widget, &child_allocation);
}
/* fit_aligned_item_requests() helper */
static gint
gather_aligned_item_requests (GtkWrapBox *box,
GtkOrientation orientation,
gint line_length,
gint item_spacing,
gint n_children,
GtkRequestedSize *item_sizes)
{
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
gint i;
gint extra_items, natural_line_size = 0;
extra_items = n_children % line_length;
for (list = priv->children, i = 0; list; list = list->next, i++)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat;
gint position;
if (!gtk_widget_get_visible (child->widget))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_width (GTK_SIZE_REQUEST (child->widget),
&child_min, &child_nat);
else
gtk_size_request_get_height (GTK_SIZE_REQUEST (child->widget),
&child_min, &child_nat);
/* Get the index and push it over for the last line when spreading to the end */
position = i % line_length;
if (ORIENTATION_SPREADING (box) == GTK_WRAP_BOX_SPREAD_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);
}
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 (GtkWrapBox *box,
GtkOrientation orientation,
gint avail_size,
gint item_spacing,
gint *line_length, /* in-out */
gint n_children)
{
GtkRequestedSize *sizes, *try_sizes;
gint natural_line_size, try_line_size, try_length;
sizes = g_new0 (GtkRequestedSize, *line_length);
/* get the sizes for the initial guess */
try_line_size = natural_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)
{
natural_line_size = try_line_size;
*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 void
gtk_wrap_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
gint avail_size, avail_other_size, min_items, item_spacing, line_spacing;
GtkWrapBoxSpreading item_spreading;
GtkWrapBoxSpreading line_spreading;
gtk_widget_set_allocation (widget, allocation);
min_items = MAX (1, priv->minimum_line_children);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
avail_size = allocation->width;
avail_other_size = allocation->height;
item_spacing = priv->horizontal_spacing;
line_spacing = priv->vertical_spacing;
}
else /* GTK_ORIENTATION_VERTICAL */
{
avail_size = allocation->height;
avail_other_size = allocation->width;
item_spacing = priv->vertical_spacing;
line_spacing = priv->horizontal_spacing;
}
item_spreading = ORIENTATION_SPREADING (box);
line_spreading = OPPOSING_ORIENTATION_SPREADING (box);
/*********************************************************
* Deal with ALIGNED/HOMOGENEOUS modes first, start with *
* initial guesses at item/line sizes *
*********************************************************/
if (priv->mode == GTK_WRAP_ALLOCATE_ALIGNED ||
priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
{
GtkRequestedSize *line_sizes = NULL;
GtkRequestedSize *item_sizes = NULL;
GList *list;
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, extra_per_item = 0, extra_extra = 0;
gint extra_line_pixels, extra_per_line = 0, extra_line_extra = 0;
gint i, this_line_size;
get_average_item_size (box, priv->orientation, &min_item_size, &nat_item_size);
/* By default wrap 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 wrap length */
line_length = MAX (min_items, line_length);
/* Get how many lines we'll be needing to wrap */
n_children = get_visible_children (box);
/* Here we just use the largest height-for-width and use that for the height
* of all lines */
if (priv->mode == GTK_WRAP_ALLOCATE_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_spreading != GTK_WRAP_BOX_SPREAD_EXPAND)
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_spreading != GTK_WRAP_BOX_SPREAD_EXPAND)
line_size = MIN (line_size, nat_fixed_line_size);
/* Get the real extra pixels incase of GTK_WRAP_BOX_SPREAD_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 /* GTK_WRAP_ALLOCATE_ALIGNED */
{
GList *list;
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, 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 */
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, list = priv->children; list != NULL; i++)
{
list =
get_largest_size_for_line_in_opposing_orientation (box, priv->orientation,
list, 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 */
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. *
*********************************************************/
/* 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_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
extra_per_item = extra_pixels / MAX (line_length -1, 1);
extra_extra = extra_pixels % MAX (line_length -1, 1);
}
else if (item_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
extra_per_item = extra_pixels / line_length;
extra_extra = extra_pixels % line_length;
}
/* Calculate expand space per line */
if (line_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
extra_per_line = extra_line_pixels / MAX (n_lines -1, 1);
extra_line_extra = extra_line_pixels % MAX (n_lines -1, 1);
}
else if (line_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
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 */
if (item_spreading == GTK_WRAP_BOX_SPREAD_END)
item_offset += extra_pixels;
if (line_spreading == GTK_WRAP_BOX_SPREAD_END)
line_offset += extra_line_pixels;
/* Get the allocation size for the first line */
if (priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
this_line_size = line_size;
else
{
this_line_size = line_sizes[0].minimum_size;
if (line_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
this_line_size += extra_per_line;
if (extra_line_extra > 0)
this_line_size++;
}
}
for (i = 0, line_count = 0, list = priv->children; list; list = list->next)
{
GtkWrapBoxChild *child = list->data;
gint position;
gint this_item_size;
if (!gtk_widget_get_visible (child->widget))
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;
if (line_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
line_offset += extra_per_line;
if (line_count < extra_line_extra)
line_offset++;
}
line_count++;
/* Get the new line size */
if (priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
this_line_size = line_size;
else
{
this_line_size = line_sizes[line_count].minimum_size;
if (line_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
this_line_size += extra_per_line;
if (line_count < extra_line_extra)
this_line_size++;
}
}
item_offset = 0;
if (item_spreading == GTK_WRAP_BOX_SPREAD_END)
{
item_offset += 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->mode == GTK_WRAP_ALLOCATE_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_spreading == GTK_WRAP_BOX_SPREAD_END &&
line_count == n_lines -1)
{
gint extra_items = n_children % line_length;
position += line_length - extra_items;
}
if (priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
this_item_size = item_size;
else /* aligned mode */
this_item_size = item_sizes[position].minimum_size;
if (item_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
this_item_size += extra_per_item;
if (position < extra_extra)
this_item_size++;
}
/* Do the actual allocation */
allocate_child (box, child, item_offset, line_offset, this_item_size, this_line_size);
item_offset += this_item_size;
item_offset += item_spacing;
/* deal with extra spacing here */
if (item_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
item_offset += extra_per_item;
if (position < extra_extra)
item_offset++;
}
i++;
}
g_free (item_sizes);
g_free (line_sizes);
}
else /* GTK_WRAP_ALLOCATE_FREE */
{
/* Here we just fit as many children as we can allocate their natural size to
* on each line and add the heights for each of them on each line */
GtkRequestedSize requested;
GtkRequestedSize *sizes = NULL;
GList *list = priv->children;
gboolean first_line = TRUE;
gint i, line_count = 0;
gint line_offset, item_offset;
gint extra_per_line = 0, extra_line_extra = 0;
gint extra_pixels;
GArray *array;
array = g_array_new (0, TRUE, sizeof (GtkRequestedSize));
while (list != NULL)
{
GArray *line_array;
AllocatedLine *line;
list =
get_largest_size_for_free_line_in_opposing_orientation (box, priv->orientation,
list, min_items, avail_size,
&requested.minimum_size,
&requested.natural_size,
&extra_pixels,
&line_array);
/* Its possible a line is made of completely invisible children */
if (requested.natural_size > 0)
{
if (first_line)
first_line = FALSE;
else
avail_other_size -= line_spacing;
avail_other_size -= requested.minimum_size;
line = g_slice_new0 (AllocatedLine);
line->requested = line_array;
line->extra_pixels = extra_pixels;
requested.data = line;
g_array_append_val (array, requested);
}
}
/* Distribute space among lines naturally */
sizes = (GtkRequestedSize *)array->data;
avail_other_size = gtk_distribute_natural_allocation (avail_other_size, array->len, sizes);
/* Calculate expand space per line */
if (line_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
extra_per_line = avail_other_size / MAX (array->len -1, 1);
extra_line_extra = avail_other_size % MAX (array->len -1, 1);
}
else if (line_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
extra_per_line = avail_other_size / array->len;
extra_line_extra = avail_other_size % array->len;
}
if (line_spreading == GTK_WRAP_BOX_SPREAD_END)
line_offset = avail_other_size;
else
line_offset = 0;
for (line_count = 0; line_count < array->len; line_count++)
{
AllocatedLine *line = (AllocatedLine *)sizes[line_count].data;
GArray *line_array = line->requested;
GtkRequestedSize *line_sizes = (GtkRequestedSize *)line_array->data;
gint line_size = sizes[line_count].minimum_size;
gint extra_per_item = 0;
gint extra_extra = 0;
/* Set line start offset */
item_offset = 0;
if (line_spreading == GTK_WRAP_BOX_SPREAD_EXPAND)
{
line_size += extra_per_line;
if (line_count < extra_line_extra)
line_size++;
}
if (item_spreading == GTK_WRAP_BOX_SPREAD_END)
item_offset += line->extra_pixels;
else if (item_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
extra_per_item = line->extra_pixels / MAX (line_array->len -1, 1);
extra_extra = line->extra_pixels % MAX (line_array->len -1, 1);
}
for (i = 0; i < line_array->len; i++)
{
GtkWrapBoxChild *child = line_sizes[i].data;
gint item_size = line_sizes[i].minimum_size;
/* Do the actual allocation */
allocate_child (box, child, item_offset, line_offset, item_size, line_size);
/* Add extra space evenly between children */
if (item_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
item_offset += extra_per_item;
if (i < extra_extra)
item_offset++;
}
/* Move item cursor along for the next allocation */
item_offset += item_spacing;
item_offset += item_size;
}
/* New line, increment offset and reset item cursor */
line_offset += line_spacing;
line_offset += line_size;
if (line_spreading == GTK_WRAP_BOX_SPREAD_EVEN)
{
line_offset += extra_per_line;
if (line_count < extra_line_extra)
line_offset++;
}
/* Free the array for this line now its not needed anymore */
g_array_free (line_array, TRUE);
g_slice_free (AllocatedLine, line);
}
g_array_free (array, TRUE);
}
}
/*****************************************************
* GtkContainerClass *
*****************************************************/
static void
gtk_wrap_box_add (GtkContainer *container,
GtkWidget *widget)
{
gtk_wrap_box_insert_child (GTK_WRAP_BOX (container), widget, -1, 0);
}
static gint
find_child_in_list (GtkWrapBoxChild *child_in_list,
GtkWidget *search)
{
return (child_in_list->widget == search) ? 0 : -1;
}
static void
gtk_wrap_box_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkWrapBox *box = GTK_WRAP_BOX (container);
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
list = g_list_find_custom (priv->children, widget,
(GCompareFunc)find_child_in_list);
if (list)
{
GtkWrapBoxChild *child = list->data;
gboolean was_visible = gtk_widget_get_visible (widget);
gtk_widget_unparent (widget);
g_slice_free (GtkWrapBoxChild, child);
priv->children = g_list_delete_link (priv->children, list);
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
static void
gtk_wrap_box_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkWrapBox *box = GTK_WRAP_BOX (container);
GtkWrapBoxPrivate *priv = box->priv;
GtkWrapBoxChild *child;
GList *list;
for (list = priv->children; list; list = list->next)
{
child = list->data;
(* callback) (child->widget, callback_data);
}
}
static GType
gtk_wrap_box_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static void
gtk_wrap_box_set_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWrapBox *box = GTK_WRAP_BOX (container);
GtkWrapBoxPrivate *priv = box->priv;
GtkWrapBoxChild *child;
GList *list;
list = g_list_find_custom (priv->children, widget,
(GCompareFunc)find_child_in_list);
g_return_if_fail (list != NULL);
child = list->data;
switch (property_id)
{
case CHILD_PROP_PACKING:
child->packing = g_value_get_flags (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
if (gtk_widget_get_visible (widget) &&
gtk_widget_get_visible (GTK_WIDGET (box)))
gtk_widget_queue_resize (widget);
}
static void
gtk_wrap_box_get_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkWrapBox *box = GTK_WRAP_BOX (container);
GtkWrapBoxPrivate *priv = box->priv;
GtkWrapBoxChild *child;
GList *list;
list = g_list_find_custom (priv->children, widget,
(GCompareFunc)find_child_in_list);
g_return_if_fail (list != NULL);
child = list->data;
switch (property_id)
{
case CHILD_PROP_PACKING:
g_value_set_flags (value, child->packing);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
/*****************************************************
* GtkSizeRequestIface *
*****************************************************/
static void
gtk_wrap_box_size_request_init (GtkSizeRequestIface *iface)
{
iface->get_request_mode = gtk_wrap_box_get_request_mode;
iface->get_width = gtk_wrap_box_get_width;
iface->get_height = gtk_wrap_box_get_height;
iface->get_height_for_width = gtk_wrap_box_get_height_for_width;
iface->get_width_for_height = gtk_wrap_box_get_width_for_height;
}
static GtkSizeRequestMode
gtk_wrap_box_get_request_mode (GtkSizeRequest *widget)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
return (priv->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 */
static void
get_largest_line_length (GtkWrapBox *box,
GtkOrientation orientation,
gint line_length,
gint *min_size,
gint *nat_size)
{
GtkWrapBoxPrivate *priv = box->priv;
GList *list;
gint max_min_size = 0;
gint max_nat_size = 0;
gint spacing;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
spacing = priv->horizontal_spacing;
else
spacing = priv->vertical_spacing;
/* Get the largest size of 'line_length' consecutive items in the list.
*/
for (list = priv->children; list; list = list->next)
{
GList *l;
gint line_min = 0;
gint line_nat = 0;
gint i;
for (l = list, i = 0; l && i < line_length; l = l->next)
{
GtkWrapBoxChild *child = list->data;
gint child_min, child_nat;
if (!gtk_widget_get_visible (child->widget))
continue;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_size_request_get_width (GTK_SIZE_REQUEST (child->widget),
&child_min, &child_nat);
else /* GTK_ORIENTATION_VERTICAL */
gtk_size_request_get_height (GTK_SIZE_REQUEST (child->widget),
&child_min, &child_nat);
if (i > 0)
{
line_min += spacing;
line_nat += spacing;
}
line_min += child_min;
line_nat += child_nat;
i++;
}
max_min_size = MAX (max_min_size, line_min);
max_nat_size = MAX (max_nat_size, line_nat);
}
if (min_size)
*min_size = max_min_size;
if (nat_size)
*nat_size = max_nat_size;
}
static void
gtk_wrap_box_get_width (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
gint min_item_width, nat_item_width;
gint min_items, nat_items;
gint min_width, nat_width;
min_items = MAX (1, priv->minimum_line_children);
nat_items = MAX (min_items, priv->natural_line_children);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
min_width = nat_width = 0;
if (priv->mode == GTK_WRAP_ALLOCATE_FREE)
{
if (priv->minimum_line_children <= 1)
{
get_average_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_line_length (box, GTK_ORIENTATION_HORIZONTAL, min_items,
&min_line_length, &nat_line_length);
if (nat_items > min_items)
get_largest_line_length (box, GTK_ORIENTATION_HORIZONTAL, nat_items,
NULL, &nat_line_length);
min_width += min_line_length;
nat_width += nat_line_length;
}
}
else /* In ALIGNED or HOMOGENEOUS modes; horizontally oriented boxs
* give the same width to all children */
{
get_average_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->horizontal_spacing;
nat_width += nat_item_width * nat_items;
nat_width += (nat_items -1) * priv->horizontal_spacing;
}
}
else /* GTK_ORIENTATION_VERTICAL */
{
/* Return the width for the minimum height */
gint min_height;
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_height (widget, &min_height, NULL);
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_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_wrap_box_get_height (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
gint min_item_height, nat_item_height;
gint min_items, nat_items;
gint min_height, nat_height;
min_items = MAX (1, priv->minimum_line_children);
nat_items = MAX (min_items, priv->natural_line_children);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Return the height for the minimum width */
gint min_width;
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_width (widget, &min_width, NULL);
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_height_for_width (widget, min_width, &min_height, &nat_height);
}
else /* GTK_ORIENTATION_VERTICAL */
{
min_height = nat_height = 0;
if (priv->mode == GTK_WRAP_ALLOCATE_FREE)
{
if (priv->minimum_line_children <= 1)
{
get_average_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_line_length (box, GTK_ORIENTATION_VERTICAL, min_items,
&min_line_length, &nat_line_length);
if (nat_items > min_items)
get_largest_line_length (box, GTK_ORIENTATION_VERTICAL, nat_items,
NULL, &nat_line_length);
min_height += min_line_length;
nat_height += nat_line_length;
}
}
else /* In ALIGNED or HOMOGENEOUS modes; horizontally oriented boxs
* give the same width to all children */
{
get_average_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->vertical_spacing;
nat_height += nat_item_height * nat_items;
nat_height += (nat_items -1) * priv->vertical_spacing;
}
}
if (minimum_size)
*minimum_size = min_height;
if (natural_size)
*natural_size = nat_height;
}
static void
gtk_wrap_box_get_height_for_width (GtkSizeRequest *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
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->minimum_line_children);
min_height = 0;
nat_height = 0;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gint min_width;
n_children = get_visible_children (box);
/* Make sure its no smaller than the minimum */
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_width (widget, &min_width, NULL);
avail_size = MAX (width, min_width);
if (priv->mode == GTK_WRAP_ALLOCATE_ALIGNED ||
priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
{
gint line_length;
gint item_size, extra_pixels;
get_average_item_size (box, GTK_ORIENTATION_HORIZONTAL, &min_item_width, &nat_item_width);
/* By default wrap at the natural item width */
line_length = avail_size / (nat_item_width + priv->horizontal_spacing);
/* After the above aproximation, check if we cant fit one more on the line */
if (line_length * priv->horizontal_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 wrap length */
line_length = MAX (min_items, line_length);
/* Now we need the real item allocation size */
item_size = (avail_size - (line_length - 1) * priv->horizontal_spacing) / line_length;
/* Cut out the expand space if we're not distributing any */
if (priv->horizontal_spreading != GTK_WRAP_BOX_SPREAD_EXPAND)
{
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->horizontal_spacing) % line_length;
if (priv->mode == GTK_WRAP_ALLOCATE_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->vertical_spacing;
nat_height += (lines - 1) * priv->vertical_spacing;
}
else /* GTK_WRAP_ALLOCATE_ALIGNED */
{
GList *list = priv->children;
gint min_line_height, nat_line_height, i;
gboolean first_line = TRUE;
GtkRequestedSize *item_sizes;
/* First get the size each set of items take to span the line
* when aligning the items above and below after wrapping.
*/
item_sizes = fit_aligned_item_requests (box, priv->orientation, avail_size,
priv->horizontal_spacing, &line_length, n_children);
/* Get the available remaining size */
avail_size -= (line_length - 1) * priv->horizontal_spacing;
for (i = 0; i < line_length; i++)
avail_size -= item_sizes[i].minimum_size;
extra_pixels = gtk_distribute_natural_allocation (avail_size, line_length, item_sizes);
while (list != NULL)
{
list =
get_largest_size_for_line_in_opposing_orientation (box, GTK_ORIENTATION_HORIZONTAL,
list, 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->vertical_spacing;
nat_height += priv->vertical_spacing;
}
min_height += min_line_height;
nat_height += nat_line_height;
}
}
g_free (item_sizes);
}
}
else /* GTK_WRAP_ALLOCATE_FREE */
{
/* Here we just fit as many children as we can allocate their natural size to
* on each line and add the heights for each of them on each line */
GList *list = priv->children;
gint min_line_height = 0, nat_line_height = 0;
gboolean first_line = TRUE;
while (list != NULL)
{
list =
get_largest_size_for_free_line_in_opposing_orientation (box, GTK_ORIENTATION_HORIZONTAL,
list, min_items, avail_size,
&min_line_height, &nat_line_height,
NULL, NULL);
/* Its possible the last line only had invisible widgets */
if (nat_line_height > 0)
{
if (first_line)
first_line = FALSE;
else
{
min_height += priv->vertical_spacing;
nat_height += priv->vertical_spacing;
}
min_height += min_line_height;
nat_height += nat_line_height;
}
}
}
}
else /* GTK_ORIENTATION_VERTICAL */
{
/* Return the minimum height */
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_height (widget, &min_height, &nat_height);
}
if (minimum_height)
*minimum_height = min_height;
if (natural_height)
*natural_height = nat_height;
}
static void
gtk_wrap_box_get_width_for_height (GtkSizeRequest *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
GtkWrapBox *box = GTK_WRAP_BOX (widget);
GtkWrapBoxPrivate *priv = box->priv;
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->minimum_line_children);
min_width = 0;
nat_width = 0;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Return the minimum width */
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_width (widget, &min_width, &nat_width);
}
else /* GTK_ORIENTATION_VERTICAL */
{
gint min_height;
n_children = get_visible_children (box);
/* Make sure its no smaller than the minimum */
GTK_SIZE_REQUEST_GET_IFACE (widget)->get_height (widget, &min_height, NULL);
avail_size = MAX (height, min_height);
if (priv->mode == GTK_WRAP_ALLOCATE_ALIGNED ||
priv->mode == GTK_WRAP_ALLOCATE_HOMOGENEOUS)
{
gint line_length;
gint item_size, extra_pixels;
get_average_item_size (box, GTK_ORIENTATION_VERTICAL, &min_item_height, &nat_item_height);
/* By default wrap at the natural item width */
line_length = avail_size / (nat_item_height + priv->vertical_spacing);
/* After the above aproximation, check if we cant fit one more on the line */
if (line_length * priv->vertical_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 wrap length */
line_length = MAX (min_items, line_length);
/* Now we need the real item allocation size */
item_size = (avail_size - (line_length - 1) * priv->vertical_spacing) / line_length;
/* Cut out the expand space if we're not distributing any */
if (priv->vertical_spreading != GTK_WRAP_BOX_SPREAD_EXPAND)
{
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->vertical_spacing) % line_length;
if (priv->mode == GTK_WRAP_ALLOCATE_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->horizontal_spacing;
nat_width += (lines - 1) * priv->horizontal_spacing;
}
else /* GTK_WRAP_ALLOCATE_ALIGNED */
{
GList *list = priv->children;
gint min_line_width, nat_line_width, i;
gboolean first_line = TRUE;
GtkRequestedSize *item_sizes;
/* First get the size each set of items take to span the line
* when aligning the items above and below after wrapping.
*/
item_sizes = fit_aligned_item_requests (box, priv->orientation, avail_size,
priv->vertical_spacing, &line_length, n_children);
/* Get the available remaining size */
avail_size -= (line_length - 1) * priv->horizontal_spacing;
for (i = 0; i < line_length; i++)
avail_size -= item_sizes[i].minimum_size;
extra_pixels = gtk_distribute_natural_allocation (avail_size, line_length, item_sizes);
while (list != NULL)
{
list =
get_largest_size_for_line_in_opposing_orientation (box, GTK_ORIENTATION_VERTICAL,
list, 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->horizontal_spacing;
nat_width += priv->horizontal_spacing;
}
min_width += min_line_width;
nat_width += nat_line_width;
}
}
g_free (item_sizes);
}
}
else /* GTK_WRAP_ALLOCATE_FREE */
{
/* Here we just fit as many children as we can allocate their natural size to
* on each line and add the heights for each of them on each line */
GList *list = priv->children;
gint min_line_width = 0, nat_line_width = 0;
gboolean first_line = TRUE;
while (list != NULL)
{
list =
get_largest_size_for_free_line_in_opposing_orientation (box, GTK_ORIENTATION_VERTICAL,
list, min_items, avail_size,
&min_line_width, &nat_line_width,
NULL, NULL);
/* Its possible the last line only had invisible widgets */
if (nat_line_width > 0)
{
if (first_line)
first_line = FALSE;
else
{
min_width += priv->horizontal_spacing;
nat_width += priv->horizontal_spacing;
}
min_width += min_line_width;
nat_width += nat_line_width;
}
}
}
}
if (minimum_width)
*minimum_width = min_width;
if (natural_width)
*natural_width = nat_width;
}
/*****************************************************
* API *
*****************************************************/
/**
* gtk_wrap_box_new:
* @mode: The #GtkWrapAllocationMode to use
* @horizontal_spreading: The horizontal #GtkWrapBoxSpreading policy to use
* @vertical_spreading: The vertical #GtkWrapBoxSpreading policy to use
* @horizontal_spacing: The horizontal spacing to add between children
* @vertical_spacing: The vertical spacing to add between children
*
* Creates an #GtkWrapBox.
*
* Returns: A new #GtkWrapBox container
*/
GtkWidget *
gtk_wrap_box_new (GtkWrapAllocationMode mode,
GtkWrapBoxSpreading horizontal_spreading,
GtkWrapBoxSpreading vertical_spreading,
guint horizontal_spacing,
guint vertical_spacing)
{
return (GtkWidget *)g_object_new (GTK_TYPE_WRAP_BOX,
"allocation-mode", mode,
"horizontal-spreading", horizontal_spreading,
"vertical-spreading", vertical_spreading,
"vertical-spacing", vertical_spacing,
"horizontal-spacing", horizontal_spacing,
NULL);
}
/**
* gtk_wrap_box_set_allocation_mode:
* @box: An #GtkWrapBox
* @mode: The #GtkWrapAllocationMode to use.
*
* Sets the allocation mode for @box's children.
*/
void
gtk_wrap_box_set_allocation_mode (GtkWrapBox *box,
GtkWrapAllocationMode mode)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->mode != mode)
{
priv->mode = mode;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "allocation-mode");
}
}
/**
* gtk_wrap_box_get_allocation_mode:
* @box: An #GtkWrapBox
*
* Gets the allocation mode.
*
* Returns: The #GtkWrapAllocationMode for @box.
*/
GtkWrapAllocationMode
gtk_wrap_box_get_allocation_mode (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->mode;
}
/**
* gtk_wrap_box_set_horizontal_spreading:
* @box: An #GtkWrapBox
* @spreading: The #GtkWrapBoxSpreading to use.
*
* Sets the horizontal spreading mode for @box's children.
*/
void
gtk_wrap_box_set_horizontal_spreading (GtkWrapBox *box,
GtkWrapBoxSpreading spreading)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->horizontal_spreading != spreading)
{
priv->horizontal_spreading = spreading;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "horizontal-spreading");
}
}
/**
* gtk_wrap_box_get_horizontal_spreading:
* @box: An #GtkWrapBox
*
* Gets the horizontal spreading mode.
*
* Returns: The horizontal #GtkWrapBoxSpreading for @box.
*/
GtkWrapBoxSpreading
gtk_wrap_box_get_horizontal_spreading (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->horizontal_spreading;
}
/**
* gtk_wrap_box_set_vertical_spreading:
* @box: An #GtkWrapBox
* @spreading: The #GtkWrapBoxSpreading to use.
*
* Sets the vertical spreading mode for @box's children.
*/
void
gtk_wrap_box_set_vertical_spreading (GtkWrapBox *box,
GtkWrapBoxSpreading spreading)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->vertical_spreading != spreading)
{
priv->vertical_spreading = spreading;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "vertical-spreading");
}
}
/**
* gtk_wrap_box_get_vertical_spreading:
* @box: An #GtkWrapBox
*
* Gets the vertical spreading mode.
*
* Returns: The vertical #GtkWrapBoxSpreading for @box.
*/
GtkWrapBoxSpreading
gtk_wrap_box_get_vertical_spreading (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->vertical_spreading;
}
/**
* gtk_wrap_box_set_vertical_spacing:
* @box: An #GtkWrapBox
* @spacing: The spacing to use.
*
* Sets the vertical space to add between children.
*/
void
gtk_wrap_box_set_vertical_spacing (GtkWrapBox *box,
guint spacing)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->vertical_spacing != spacing)
{
priv->vertical_spacing = spacing;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "vertical-spacing");
}
}
/**
* gtk_wrap_box_get_vertical_spacing:
* @box: An #GtkWrapBox
*
* Gets the vertical spacing.
*
* Returns: The vertical spacing.
*/
guint
gtk_wrap_box_get_vertical_spacing (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->vertical_spacing;
}
/**
* gtk_wrap_box_set_horizontal_spacing:
* @box: An #GtkWrapBox
* @spacing: The spacing to use.
*
* Sets the horizontal space to add between children.
*/
void
gtk_wrap_box_set_horizontal_spacing (GtkWrapBox *box,
guint spacing)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->horizontal_spacing != spacing)
{
priv->horizontal_spacing = spacing;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "horizontal-spacing");
}
}
/**
* gtk_wrap_box_get_horizontal_spacing:
* @box: An #GtkWrapBox
*
* Gets the horizontal spacing.
*
* Returns: The horizontal spacing.
*/
guint
gtk_wrap_box_get_horizontal_spacing (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->horizontal_spacing;
}
/**
* gtk_wrap_box_set_minimum_line_children:
* @box: An #GtkWrapBox
* @n_children: The minimum amount of children per line.
*
* Sets the minimum amount of children to line up
* in @box's orientation before wrapping.
*/
void
gtk_wrap_box_set_minimum_line_children (GtkWrapBox *box,
guint n_children)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->minimum_line_children != n_children)
{
priv->minimum_line_children = n_children;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "minimum-line-children");
}
}
/**
* gtk_wrap_box_get_minimum_line_children:
* @box: An #GtkWrapBox
*
* Gets the minimum amount of children per line.
*
* Returns: The minimum amount of children per line.
*/
guint
gtk_wrap_box_get_minimum_line_children (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->minimum_line_children;
}
/**
* gtk_wrap_box_set_natural_line_children:
* @box: An #GtkWrapBox
* @n_children: The natural amount of children per line.
*
* Sets the natural length of items to request and
* allocate space for in @box's orientation.
*
* Setting the natural amount of children per line
* limits the overall natural size request to be no more
* than @n_children items long in the given orientation.
*/
void
gtk_wrap_box_set_natural_line_children (GtkWrapBox *box,
guint n_children)
{
GtkWrapBoxPrivate *priv;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
priv = box->priv;
if (priv->natural_line_children != n_children)
{
priv->natural_line_children = n_children;
gtk_widget_queue_resize (GTK_WIDGET (box));
g_object_notify (G_OBJECT (box), "natural-line-children");
}
}
/**
* gtk_wrap_box_get_natural_line_children:
* @box: An #GtkWrapBox
*
* Gets the natural amount of children per line.
*
* Returns: The natural amount of children per line.
*/
guint
gtk_wrap_box_get_natural_line_children (GtkWrapBox *box)
{
g_return_val_if_fail (GTK_IS_WRAP_BOX (box), FALSE);
return box->priv->natural_line_children;
}
/**
* gtk_wrap_box_insert_child:
* @box: And #GtkWrapBox
* @widget: the child #GtkWidget to add
* @index: the position in the child list to insert, specify -1 to append to the list.
* @packing: The #GtkWrapBoxPacking options to use.
*
* Adds a child to an #GtkWrapBox with its packing options set
*
*/
void
gtk_wrap_box_insert_child (GtkWrapBox *box,
GtkWidget *widget,
gint index,
GtkWrapBoxPacking packing)
{
GtkWrapBoxPrivate *priv;
GtkWrapBoxChild *child;
GList *list;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = box->priv;
list = g_list_find_custom (priv->children, widget,
(GCompareFunc)find_child_in_list);
g_return_if_fail (list == NULL);
child = g_slice_new0 (GtkWrapBoxChild);
child->widget = widget;
child->packing = packing;
priv->children = g_list_insert (priv->children, child, index);
gtk_widget_set_parent (widget, GTK_WIDGET (box));
}
/**
* gtk_wrap_box_reorder_child:
* @box: An #GtkWrapBox
* @widget: The child to reorder
* @index: The new child position
*
* Reorders the child @widget in @box's list of children.
*/
void
gtk_wrap_box_reorder_child (GtkWrapBox *box,
GtkWidget *widget,
guint index)
{
GtkWrapBoxPrivate *priv;
GtkWrapBoxChild *child;
GList *list;
g_return_if_fail (GTK_IS_WRAP_BOX (box));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = box->priv;
list = g_list_find_custom (priv->children, widget,
(GCompareFunc)find_child_in_list);
g_return_if_fail (list != NULL);
if (g_list_position (priv->children, list) != index)
{
child = list->data;
priv->children = g_list_delete_link (priv->children, list);
priv->children = g_list_insert (priv->children, child, index);
gtk_widget_queue_resize (GTK_WIDGET (box));
}
}
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