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gtk2/gtk/gtkpopover.c
Carlos Garnacho 074e17e100 popover: Don't overdraw background 
It was only done so the background would connect visually to the popover
tail, but then it brings aliasing issues when the border is drawn over the
background. Instead, overdraw the tail, so it also fills the gap left by
the border.
2014-01-22 18:32:16 +01:00

1680 lines
47 KiB
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/* GTK - The GIMP Toolkit
* Copyright © 2013 Carlos Garnacho <carlosg@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:gtkpopover
* @Short_description: Context dependent bubbles
* @Title: GtkPopover
*
* GtkPopover is a bubble-like context window, primarily meant to
* provide context-dependent information or options. Popovers are
* attached to a widget, passed at construction time on gtk_popover_new(),
* or updated afterwards through gtk_popover_set_relative_to(), by
* default they will point to the whole widget area, although this
* behavior can be changed through gtk_popover_set_pointing_to().
*
* The position of a popover relative to the widget it is attached to
* can also be changed through gtk_popover_set_position().
*
* By default, #GtkPopover performs a GTK+ grab, in order to ensure
* input events get redirected to it while it is shown, and also so
* the popover is dismissed on the expected situations (clicks outside
* the popover, or the Esc key being pressed). If no such modal behavior
* is desired on a popover, gtk_popover_set_modal() may be called on it
* to tweak its behavior.
*
* Since: 3.12
*/
#include "config.h"
#include <gdk/gdk.h>
#include <cairo-gobject.h>
#include "gtkpopover.h"
#include "gtktypebuiltins.h"
#include "gtkmain.h"
#include "gtkwindowprivate.h"
#include "gtkscrollable.h"
#include "gtkadjustment.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#define TAIL_GAP_WIDTH 24
#define TAIL_HEIGHT 12
#define POS_IS_VERTICAL(p) ((p) == GTK_POS_TOP || (p) == GTK_POS_BOTTOM)
typedef struct _GtkPopoverPrivate GtkPopoverPrivate;
enum {
PROP_RELATIVE_TO = 1,
PROP_POINTING_TO,
PROP_POSITION,
PROP_MODAL
};
struct _GtkPopoverPrivate
{
GtkWidget *widget;
GtkWindow *window;
GtkWidget *prev_focus_widget;
GtkScrollable *parent_scrollable;
GtkAdjustment *vadj;
GtkAdjustment *hadj;
cairo_rectangle_int_t pointing_to;
guint hierarchy_changed_id;
guint size_allocate_id;
guint unmap_id;
guint scrollable_notify_id;
guint has_pointing_to : 1;
guint preferred_position : 2;
guint final_position : 2;
guint current_position : 2;
guint modal : 1;
};
static GQuark quark_widget_popovers = 0;
static void gtk_popover_update_position (GtkPopover *popover);
static void gtk_popover_update_relative_to (GtkPopover *popover,
GtkWidget *relative_to);
G_DEFINE_TYPE_WITH_PRIVATE (GtkPopover, gtk_popover, GTK_TYPE_BIN)
static void
gtk_popover_init (GtkPopover *popover)
{
GtkPopoverPrivate *priv;
GtkWidget *widget;
widget = GTK_WIDGET (popover);
gtk_widget_set_has_window (widget, TRUE);
popover->priv = priv = gtk_popover_get_instance_private (popover);
priv->modal = TRUE;
}
static void
gtk_popover_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
switch (prop_id)
{
case PROP_RELATIVE_TO:
gtk_popover_set_relative_to (GTK_POPOVER (object),
g_value_get_object (value));
break;
case PROP_POINTING_TO:
gtk_popover_set_pointing_to (GTK_POPOVER (object),
g_value_get_boxed (value));
break;
case PROP_POSITION:
gtk_popover_set_position (GTK_POPOVER (object),
g_value_get_enum (value));
break;
case PROP_MODAL:
gtk_popover_set_modal (GTK_POPOVER (object),
g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_popover_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkPopoverPrivate *priv = GTK_POPOVER (object)->priv;
switch (prop_id)
{
case PROP_RELATIVE_TO:
g_value_set_object (value, priv->widget);
break;
case PROP_POINTING_TO:
g_value_set_boxed (value, &priv->pointing_to);
break;
case PROP_POSITION:
g_value_set_enum (value, priv->preferred_position);
break;
case PROP_MODAL:
g_value_set_boolean (value, priv->modal);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_popover_finalize (GObject *object)
{
GtkPopover *popover = GTK_POPOVER (object);
GtkPopoverPrivate *priv = popover->priv;
if (priv->widget)
gtk_popover_update_relative_to (popover, NULL);
G_OBJECT_CLASS (gtk_popover_parent_class)->finalize (object);
}
static void
gtk_popover_dispose (GObject *object)
{
GtkPopover *popover = GTK_POPOVER (object);
GtkPopoverPrivate *priv = popover->priv;
if (priv->window)
_gtk_window_remove_popover (priv->window, GTK_WIDGET (object));
priv->window = NULL;
if (priv->widget)
gtk_popover_update_relative_to (popover, NULL);
if (priv->prev_focus_widget)
{
g_object_unref (priv->prev_focus_widget);
priv->prev_focus_widget = NULL;
}
gtk_widget_set_visible (GTK_WIDGET (object), FALSE);
G_OBJECT_CLASS (gtk_popover_parent_class)->dispose (object);
}
static void
gtk_popover_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GdkWindowAttr attributes;
gint attributes_mask;
GdkWindow *window;
gtk_widget_get_allocation (widget, &allocation);
attributes.x = 0;
attributes.y = 0;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.visual = gtk_widget_get_visual (widget);
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.event_mask =
gtk_widget_get_events (widget) |
GDK_BUTTON_MOTION_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_EXPOSURE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, window);
gtk_widget_register_window (widget, window);
gtk_widget_set_realized (widget, TRUE);
}
static void
gtk_popover_apply_modality (GtkPopover *popover,
gboolean modal)
{
GtkPopoverPrivate *priv;
priv = popover->priv;
if (modal)
{
GtkWidget *prev_focus;
prev_focus = gtk_window_get_focus (priv->window);
priv->prev_focus_widget = g_object_ref (prev_focus);
gtk_grab_add (GTK_WIDGET (popover));
gtk_widget_grab_focus (GTK_WIDGET (popover));
}
else
{
gtk_grab_remove (GTK_WIDGET (popover));
/* Let prev_focus_widget regain focus */
if (priv->prev_focus_widget)
{
gtk_widget_grab_focus (priv->prev_focus_widget);
g_object_unref (priv->prev_focus_widget);
priv->prev_focus_widget = NULL;
}
}
}
static void
gtk_popover_map (GtkWidget *widget)
{
GtkPopoverPrivate *priv;
priv = GTK_POPOVER (widget)->priv;
GTK_WIDGET_CLASS (gtk_popover_parent_class)->map (widget);
gdk_window_show (gtk_widget_get_window (widget));
gtk_popover_update_position (GTK_POPOVER (widget));
if (priv->modal)
gtk_popover_apply_modality (GTK_POPOVER (widget), TRUE);
}
static void
gtk_popover_unmap (GtkWidget *widget)
{
GtkPopoverPrivate *priv;
priv = GTK_POPOVER (widget)->priv;
if (priv->modal)
gtk_popover_apply_modality (GTK_POPOVER (widget), FALSE);
gdk_window_hide (gtk_widget_get_window (widget));
GTK_WIDGET_CLASS (gtk_popover_parent_class)->unmap (widget);
}
static void
gtk_popover_get_pointed_to_coords (GtkPopover *popover,
cairo_rectangle_int_t *rect_out)
{
GtkPopoverPrivate *priv = popover->priv;
cairo_rectangle_int_t rect;
if (!rect_out)
return;
gtk_popover_get_pointing_to (popover, &rect);
gtk_widget_translate_coordinates (priv->widget, GTK_WIDGET (priv->window),
rect.x, rect.y, &rect.x, &rect.y);
*rect_out = rect;
}
static GtkPositionType
get_effective_position (GtkPopover *popover,
GtkPositionType pos)
{
if (gtk_widget_get_direction (GTK_WIDGET (popover)) == GTK_TEXT_DIR_RTL)
{
if (pos == GTK_POS_LEFT)
pos = GTK_POS_RIGHT;
else if (pos == GTK_POS_RIGHT)
pos = GTK_POS_LEFT;
}
return pos;
}
static void
get_margin (GtkWidget *widget,
GtkBorder *border)
{
GtkStyleContext *context;
GtkStateFlags state;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_margin (context, state, border);
}
static void
gtk_popover_get_gap_coords (GtkPopover *popover,
gint *initial_x_out,
gint *initial_y_out,
gint *tip_x_out,
gint *tip_y_out,
gint *final_x_out,
gint *final_y_out,
GtkPositionType *gap_side_out)
{
GtkWidget *widget = GTK_WIDGET (popover);
GtkPopoverPrivate *priv = popover->priv;
cairo_rectangle_int_t rect;
gint base, tip, tip_pos;
gint initial_x, initial_y;
gint tip_x, tip_y;
gint final_x, final_y;
GtkPositionType gap_side, pos;
GtkAllocation allocation;
gint border_radius;
GtkStateFlags state;
GtkStyleContext *context;
GtkBorder margin, border;
gtk_popover_get_pointing_to (popover, &rect);
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_translate_coordinates (priv->widget, widget,
rect.x, rect.y, &rect.x, &rect.y);
get_margin (widget, &margin);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
rect.x += gtk_widget_get_margin_start (widget);
else
rect.x += gtk_widget_get_margin_end (widget);
rect.y += gtk_widget_get_margin_top (widget);
context = gtk_widget_get_style_context (GTK_WIDGET (popover));
state = gtk_widget_get_state_flags (GTK_WIDGET (popover));
gtk_style_context_get_border (context, state, &border);
gtk_style_context_get (context, state,
GTK_STYLE_PROPERTY_BORDER_RADIUS, &border_radius,
NULL);
pos = get_effective_position (popover, priv->final_position);
if (pos == GTK_POS_BOTTOM || pos == GTK_POS_RIGHT)
{
base = TAIL_HEIGHT + ((pos == GTK_POS_BOTTOM) ? border.top : border.left);
tip = 0;
gap_side = (priv->final_position == GTK_POS_BOTTOM) ? GTK_POS_TOP : GTK_POS_LEFT;
}
else if (pos == GTK_POS_TOP)
{
base = allocation.height - TAIL_HEIGHT - border.bottom;
tip = allocation.height;
gap_side = GTK_POS_BOTTOM;
}
else if (pos == GTK_POS_LEFT)
{
base = allocation.width - TAIL_HEIGHT - border.right;
tip = allocation.width;
gap_side = GTK_POS_RIGHT;
}
else
g_assert_not_reached ();
if (POS_IS_VERTICAL (pos))
{
tip_pos = rect.x + (rect.width / 2);
initial_x = CLAMP (tip_pos - TAIL_GAP_WIDTH / 2,
border_radius + margin.left,
allocation.width - TAIL_GAP_WIDTH - margin.right - border_radius);
initial_y = base;
tip_x = CLAMP (tip_pos, 0, allocation.width);
tip_y = tip;
final_x = CLAMP (tip_pos + TAIL_GAP_WIDTH / 2,
border_radius + margin.left + TAIL_GAP_WIDTH,
allocation.width - margin.right - border_radius);
final_y = base;
}
else
{
tip_pos = rect.y + (rect.height / 2);
initial_x = base;
initial_y = CLAMP (tip_pos - TAIL_GAP_WIDTH / 2,
border_radius + margin.top,
allocation.height - TAIL_GAP_WIDTH - margin.bottom - border_radius);
tip_x = tip;
tip_y = CLAMP (tip_pos, 0, allocation.height);
final_x = base;
final_y = CLAMP (tip_pos + TAIL_GAP_WIDTH / 2,
border_radius + margin.top + TAIL_GAP_WIDTH,
allocation.height - margin.right - border_radius);
}
if (initial_x_out)
*initial_x_out = initial_x;
if (initial_y_out)
*initial_y_out = initial_y;
if (tip_x_out)
*tip_x_out = tip_x;
if (tip_y_out)
*tip_y_out = tip_y;
if (final_x_out)
*final_x_out = final_x;
if (final_y_out)
*final_y_out = final_y;
if (gap_side_out)
*gap_side_out = gap_side;
}
static void
gtk_popover_get_rect_coords (GtkPopover *popover,
gint *x1_out,
gint *y1_out,
gint *x2_out,
gint *y2_out)
{
GtkWidget *widget = GTK_WIDGET (popover);
GtkPopoverPrivate *priv = popover->priv;
GtkAllocation allocation;
GtkPositionType pos;
gint x1, x2, y1, y2;
GtkBorder margin;
gtk_widget_get_allocation (widget, &allocation);
get_margin (widget, &margin);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
x1 = gtk_widget_get_margin_start (widget);
else
x1 = gtk_widget_get_margin_end (widget);
y1 = gtk_widget_get_margin_top (widget);
x2 = allocation.width -
gtk_widget_get_margin_end (widget) + x1;
y2 = allocation.height -
gtk_widget_get_margin_bottom (widget) + y1;
pos = get_effective_position (popover, priv->final_position);
if (pos == GTK_POS_TOP)
y2 -= MAX (TAIL_HEIGHT, margin.bottom);
else if (pos == GTK_POS_BOTTOM)
y1 += MAX (TAIL_HEIGHT, margin.top);
else if (pos == GTK_POS_LEFT)
x2 -= MAX (TAIL_HEIGHT, margin.right);
else if (pos == GTK_POS_RIGHT)
x1 += MAX (TAIL_HEIGHT, margin.left);
if (pos != GTK_POS_BOTTOM)
y1 += margin.top;
if (pos != GTK_POS_TOP)
y2 -= margin.bottom;
if (pos != GTK_POS_RIGHT)
x1 += margin.left;
if (pos != GTK_POS_LEFT)
x2 -= margin.right;
if (x1_out)
*x1_out = x1;
if (y1_out)
*y1_out = y1;
if (x2_out)
*x2_out = x2;
if (y2_out)
*y2_out = y2;
}
static void
gtk_popover_apply_tail_path (GtkPopover *popover,
cairo_t *cr)
{
gint initial_x, initial_y;
gint tip_x, tip_y;
gint final_x, final_y;
gtk_popover_get_gap_coords (popover,
&initial_x, &initial_y,
&tip_x, &tip_y,
&final_x, &final_y,
NULL);
cairo_move_to (cr, initial_x, initial_y);
cairo_line_to (cr, tip_x, tip_y);
cairo_line_to (cr, final_x, final_y);
}
static void
gtk_popover_apply_border_path (GtkPopover *popover,
cairo_t *cr)
{
GtkPopoverPrivate *priv;
GtkAllocation allocation;
gint x1, y1, x2, y2;
priv = popover->priv;
gtk_widget_get_allocation (GTK_WIDGET (popover), &allocation);
gtk_popover_apply_tail_path (popover, cr);
gtk_popover_get_rect_coords (popover, &x1, &y1, &x2, &y2);
if (priv->final_position == GTK_POS_TOP)
{
cairo_line_to (cr, x2, y2);
cairo_line_to (cr, x2, y1);
cairo_line_to (cr, x1, y1);
cairo_line_to (cr, x1, y2);
}
else if (priv->final_position == GTK_POS_BOTTOM)
{
cairo_line_to (cr, x2, y1);
cairo_line_to (cr, x2, y2);
cairo_line_to (cr, x1, y2);
cairo_line_to (cr, x1, y1);
}
else if (priv->final_position == GTK_POS_LEFT)
{
cairo_line_to (cr, x2, y2);
cairo_line_to (cr, x1, y2);
cairo_line_to (cr, x1, y1);
cairo_line_to (cr, x2, y1);
}
else if (priv->final_position == GTK_POS_RIGHT)
{
cairo_line_to (cr, x1, y1);
cairo_line_to (cr, x2, y1);
cairo_line_to (cr, x2, y2);
cairo_line_to (cr, x1, y2);
}
cairo_close_path (cr);
}
static void
gtk_popover_update_shape (GtkPopover *popover)
{
cairo_surface_t *surface;
cairo_region_t *region;
GdkWindow *win;
cairo_t *cr;
win = gtk_widget_get_window (GTK_WIDGET (popover));
surface =
gdk_window_create_similar_surface (win,
CAIRO_CONTENT_COLOR_ALPHA,
gdk_window_get_width (win),
gdk_window_get_height (win));
cr = cairo_create (surface);
gtk_popover_apply_border_path (popover, cr);
cairo_fill (cr);
cairo_destroy (cr);
region = gdk_cairo_region_create_from_surface (surface);
cairo_surface_destroy (surface);
gtk_widget_shape_combine_region (GTK_WIDGET (popover), region);
cairo_region_destroy (region);
}
static void
_gtk_popover_update_child_visible (GtkPopover *popover)
{
cairo_rectangle_int_t rect;
GtkAllocation allocation;
GtkPopoverPrivate *priv;
GtkWidget *parent;
priv = popover->priv;
if (!priv->parent_scrollable)
{
gtk_widget_set_child_visible (GTK_WIDGET (popover), TRUE);
return;
}
parent = gtk_widget_get_parent (GTK_WIDGET (priv->parent_scrollable));
rect = priv->pointing_to;
gtk_widget_translate_coordinates (priv->widget, parent,
rect.x, rect.y, &rect.x, &rect.y);
gtk_widget_get_allocation (GTK_WIDGET (parent), &allocation);
if (rect.x < 0 || rect.x + rect.width > allocation.width ||
rect.y < 0 || rect.y + rect.height > allocation.height)
gtk_widget_set_child_visible (GTK_WIDGET (popover), FALSE);
else
gtk_widget_set_child_visible (GTK_WIDGET (popover), TRUE);
}
static void
gtk_popover_update_position (GtkPopover *popover)
{
GtkAllocation window_alloc;
cairo_rectangle_int_t rect;
GtkPopoverPrivate *priv;
GtkPositionType pos;
GtkRequisition req;
priv = popover->priv;
if (!priv->window)
return;
gtk_widget_get_preferred_size (GTK_WIDGET (popover), NULL, &req);
gtk_widget_get_allocation (GTK_WIDGET (priv->window), &window_alloc);
priv->final_position = priv->preferred_position;
gtk_popover_get_pointed_to_coords (popover, &rect);
pos = get_effective_position (popover, priv->preferred_position);
/* Check whether there's enough room on the
* preferred side, move to the opposite one if not.
*/
if (pos == GTK_POS_TOP && rect.y < req.height)
priv->final_position = GTK_POS_BOTTOM;
else if (pos == GTK_POS_BOTTOM && rect.y > window_alloc.height - req.height)
priv->final_position = GTK_POS_TOP;
else if (pos == GTK_POS_LEFT && rect.x < req.width)
priv->final_position = get_effective_position (popover, GTK_POS_RIGHT);
else if (pos == GTK_POS_RIGHT && rect.x > window_alloc.width - req.width)
priv->final_position = get_effective_position (popover, GTK_POS_LEFT);
_gtk_window_set_popover_position (priv->window, GTK_WIDGET (popover),
priv->final_position, &rect);
if (priv->final_position != priv->current_position)
{
if (gtk_widget_is_drawable (GTK_WIDGET (popover)))
gtk_popover_update_shape (popover);
priv->current_position = priv->final_position;
}
_gtk_popover_update_child_visible (popover);
}
static gboolean
gtk_popover_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkStyleContext *context;
GtkAllocation allocation;
GtkWidget *child;
GtkBorder border;
GdkRGBA border_color;
gint rect_x1, rect_x2, rect_y1, rect_y2;
gint initial_x, initial_y, final_x, final_y;
gint gap_start, gap_end;
GtkPositionType gap_side;
GtkStateFlags state;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_widget_get_allocation (widget, &allocation);
gtk_style_context_get_border (context, state, &border);
gtk_popover_get_rect_coords (GTK_POPOVER (widget),
&rect_x1, &rect_y1,
&rect_x2, &rect_y2);
/* Render the rect background */
gtk_render_background (context, cr,
rect_x1 + border.left, rect_y1 + border.top,
rect_x2 - rect_x1 - border.left - border.right,
rect_y2 - rect_y1 - border.top - border.bottom);
gtk_popover_get_gap_coords (GTK_POPOVER (widget),
&initial_x, &initial_y,
NULL, NULL,
&final_x, &final_y,
&gap_side);
if (POS_IS_VERTICAL (gap_side))
{
gap_start = initial_x - rect_x1;
gap_end = final_x - rect_x1;
}
else
{
gap_start = initial_y - rect_y1;
gap_end = final_y - rect_y1;
}
/* Now render the frame, without the gap for the arrow tip */
gtk_render_frame_gap (context, cr,
rect_x1, rect_y1,
rect_x2 - rect_x1, rect_y2 - rect_y1,
gap_side,
gap_start, gap_end);
/* Clip to the arrow shape */
cairo_save (cr);
gtk_popover_apply_tail_path (GTK_POPOVER (widget), cr);
cairo_clip (cr);
/* Render the arrow background */
gtk_render_background (context, cr,
0, 0,
allocation.width, allocation.height);
/* Render the border of the arrow tip */
if (border.bottom > 0)
{
gtk_style_context_get_border_color (context, state, &border_color);
gtk_popover_apply_tail_path (GTK_POPOVER (widget), cr);
gdk_cairo_set_source_rgba (cr, &border_color);
cairo_set_line_width (cr, border.bottom + 1);
cairo_stroke (cr);
}
/* We're done */
cairo_restore (cr);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child)
gtk_container_propagate_draw (GTK_CONTAINER (widget), child, cr);
return TRUE;
}
static void
get_padding_and_border (GtkWidget *widget,
GtkBorder *border)
{
GtkStyleContext *context;
GtkStateFlags state;
gint border_width;
GtkBorder tmp;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
gtk_style_context_get_padding (context, state, border);
gtk_style_context_get_border (context, state, &tmp);
border->top += tmp.top + border_width;
border->right += tmp.right + border_width;
border->bottom += tmp.bottom + border_width;
border->left += tmp.left + border_width;
}
static void
gtk_popover_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
GtkPopoverPrivate *priv;
GtkWidget *child;
GtkPositionType pos;
gint min, nat, extra;
GtkBorder border, margin;
priv = GTK_POPOVER (widget)->priv;
child = gtk_bin_get_child (GTK_BIN (widget));
min = nat = 0;
if (child)
gtk_widget_get_preferred_width (child, &min, &nat);
get_padding_and_border (widget, &border);
get_margin (widget, &margin);
min += border.left + border.right;
nat += border.left + border.right;
pos = get_effective_position (GTK_POPOVER (widget), priv->preferred_position);
if (pos == GTK_POS_LEFT)
extra = margin.left + MAX (TAIL_HEIGHT, margin.right);
else if (pos == GTK_POS_RIGHT)
extra = MAX (TAIL_HEIGHT, margin.left) + margin.right;
else
extra = margin.left + margin.right;
min += extra;
nat += extra;
if (minimum_width)
*minimum_width = MAX (min, TAIL_GAP_WIDTH);
if (natural_width)
*natural_width = MAX (nat, TAIL_GAP_WIDTH);
}
static void
gtk_popover_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
GtkPopoverPrivate *priv;
GtkWidget *child;
GtkPositionType pos;
gint min, nat, extra;
gint child_height;
GtkBorder border, margin;
priv = GTK_POPOVER (widget)->priv;
child = gtk_bin_get_child (GTK_BIN (widget));
min = nat = 0;
child_height = height;
if (POS_IS_VERTICAL (priv->preferred_position))
child_height -= TAIL_HEIGHT;
get_padding_and_border (widget, &border);
get_margin (widget, &margin);
child_height -= border.top + border.bottom;
if (child)
gtk_widget_get_preferred_width_for_height (child, child_height, &min, &nat);
min += border.left + border.right;
nat += border.left + border.right;
pos = get_effective_position (GTK_POPOVER (widget), priv->preferred_position);
if (pos == GTK_POS_LEFT)
extra = margin.left + MAX (TAIL_HEIGHT, margin.right);
else if (pos == GTK_POS_RIGHT)
extra = MAX (TAIL_HEIGHT, margin.left) + margin.right;
else
extra = margin.left + margin.right;
min += extra;
nat += extra;
if (minimum_width)
*minimum_width = MAX (min, TAIL_GAP_WIDTH);
if (natural_width)
*natural_width = MAX (nat, TAIL_GAP_WIDTH);
}
static void
gtk_popover_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
GtkPopoverPrivate *priv;
GtkWidget *child;
GtkPositionType pos;
gint min, nat, extra;
GtkBorder border, margin;
priv = GTK_POPOVER (widget)->priv;
child = gtk_bin_get_child (GTK_BIN (widget));
min = nat = 0;
if (child)
gtk_widget_get_preferred_height (child, &min, &nat);
get_padding_and_border (widget, &border);
get_margin (widget, &margin);
min += border.top + border.bottom;
nat += border.top + border.bottom;
pos = get_effective_position (GTK_POPOVER (widget), priv->preferred_position);
if (pos == GTK_POS_TOP)
extra = margin.top + MAX (TAIL_HEIGHT, margin.bottom);
else if (pos == GTK_POS_BOTTOM)
extra = MAX (TAIL_HEIGHT, margin.top) + margin.bottom;
else
extra = margin.top + margin.bottom;
min += extra;
nat += extra;
if (minimum_height)
*minimum_height = MAX (min, TAIL_GAP_WIDTH);
if (natural_height)
*natural_height = MAX (nat, TAIL_GAP_WIDTH);
}
static void
gtk_popover_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
GtkPopoverPrivate *priv;
GtkWidget *child;
GtkPositionType pos;
gint min, nat, extra;
gint child_width;
GtkBorder border, margin;
priv = GTK_POPOVER (widget)->priv;
child = gtk_bin_get_child (GTK_BIN (widget));
min = nat = 0;
child_width = width;
if (!POS_IS_VERTICAL (priv->preferred_position))
child_width -= TAIL_HEIGHT;
get_padding_and_border (widget, &border);
get_margin (widget, &margin);
child_width -= border.left + border.right;
if (child)
gtk_widget_get_preferred_height_for_width (child, child_width, &min, &nat);
min += border.top + border.bottom;
nat += border.top + border.bottom;
pos = get_effective_position (GTK_POPOVER (widget), priv->preferred_position);
if (pos == GTK_POS_TOP)
extra = margin.top + MAX (TAIL_HEIGHT, margin.bottom);
else if (pos == GTK_POS_BOTTOM)
extra = MAX (TAIL_HEIGHT, margin.top) + margin.bottom;
else
extra = margin.top + margin.bottom;
min += extra;
nat += extra;
if (minimum_height)
*minimum_height = MAX (min, TAIL_GAP_WIDTH);
if (natural_height)
*natural_height = MAX (nat, TAIL_GAP_WIDTH);
}
static void
gtk_popover_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWidget *child;
gtk_widget_set_allocation (widget, allocation);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child)
{
GtkAllocation child_alloc;
gint x1, y1, x2, y2;
GtkBorder border;
gtk_popover_get_rect_coords (GTK_POPOVER (widget),
&x1, &y1, &x2, &y2);
get_padding_and_border (widget, &border);
child_alloc.x = x1 + border.left;
child_alloc.y = y1 + border.top;
child_alloc.width = (x2 - x1) - border.left - border.right;
child_alloc.height = (y2 - y1) - border.top - border.bottom;
gtk_widget_size_allocate (child, &child_alloc);
}
if (gtk_widget_get_realized (widget))
{
gdk_window_move_resize (gtk_widget_get_window (widget),
0, 0, allocation->width, allocation->height);
gtk_popover_update_shape (GTK_POPOVER (widget));
}
}
static gboolean
gtk_popover_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkWidget *child;
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && event->window == gtk_widget_get_window (widget))
{
GtkAllocation child_alloc;
gtk_widget_get_allocation (child, &child_alloc);
if (event->x < child_alloc.x ||
event->x > child_alloc.x + child_alloc.width ||
event->y < child_alloc.y ||
event->y > child_alloc.y + child_alloc.height)
gtk_widget_hide (widget);
}
else
gtk_widget_hide (widget);
return GDK_EVENT_PROPAGATE;
}
static gboolean
gtk_popover_key_press (GtkWidget *widget,
GdkEventKey *event)
{
if (event->keyval == GDK_KEY_Escape)
{
gtk_widget_hide (widget);
return GDK_EVENT_STOP;
}
return GDK_EVENT_PROPAGATE;
}
static void
gtk_popover_grab_focus (GtkWidget *widget)
{
/* Focus the first natural child */
gtk_widget_child_focus (gtk_bin_get_child (GTK_BIN (widget)),
GTK_DIR_TAB_FORWARD);
}
static gboolean
gtk_popover_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkPopoverPrivate *priv;
priv = gtk_popover_get_instance_private (GTK_POPOVER (widget));
if (!GTK_WIDGET_CLASS (gtk_popover_parent_class)->focus (widget, direction))
{
GtkWidget *focus;
focus = gtk_window_get_focus (priv->window);
focus = gtk_widget_get_parent (focus);
/* Unset focus child through children, so it is next stepped from
* scratch.
*/
while (focus && focus != widget)
{
gtk_container_set_focus_child (GTK_CONTAINER (focus), NULL);
focus = gtk_widget_get_parent (focus);
}
return gtk_widget_child_focus (gtk_bin_get_child (GTK_BIN (widget)),
direction);
}
return TRUE;
}
static void
gtk_popover_class_init (GtkPopoverClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gtk_popover_set_property;
object_class->get_property = gtk_popover_get_property;
object_class->finalize = gtk_popover_finalize;
object_class->dispose = gtk_popover_dispose;
widget_class->realize = gtk_popover_realize;
widget_class->map = gtk_popover_map;
widget_class->unmap = gtk_popover_unmap;
widget_class->get_preferred_width = gtk_popover_get_preferred_width;
widget_class->get_preferred_height = gtk_popover_get_preferred_height;
widget_class->get_preferred_width_for_height = gtk_popover_get_preferred_width_for_height;
widget_class->get_preferred_height_for_width = gtk_popover_get_preferred_height_for_width;
widget_class->size_allocate = gtk_popover_size_allocate;
widget_class->draw = gtk_popover_draw;
widget_class->button_press_event = gtk_popover_button_press;
widget_class->key_press_event = gtk_popover_key_press;
widget_class->grab_focus = gtk_popover_grab_focus;
widget_class->focus = gtk_popover_focus;
/**
* GtkPopover:relative-to:
*
* Sets the attached widget.
*
* Since: 3.12
*/
g_object_class_install_property (object_class,
PROP_RELATIVE_TO,
g_param_spec_object ("relative-to",
P_("Relative to"),
P_("Widget the bubble window points to"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE));
/**
* GtkPopover:pointing-to:
*
* Marks a specific rectangle to be pointed.
*
* Since: 3.12
*/
g_object_class_install_property (object_class,
PROP_POINTING_TO,
g_param_spec_boxed ("pointing-to",
P_("Pointing to"),
P_("Rectangle the bubble window points to"),
CAIRO_GOBJECT_TYPE_RECTANGLE_INT,
GTK_PARAM_READWRITE));
/**
* GtkPopover:position
*
* Sets the preferred position of the popover.
*
* Since: 3.12
*/
g_object_class_install_property (object_class,
PROP_POSITION,
g_param_spec_enum ("position",
P_("Position"),
P_("Position to place the bubble window"),
GTK_TYPE_POSITION_TYPE, GTK_POS_TOP,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
/**
* GtkPopover:modal
*
* Sets whether the popover is modal (so other elements in the window are
* not usable while the popover is visible).
*
* Since: 3.12
*/
g_object_class_install_property (object_class,
PROP_MODAL,
g_param_spec_boolean ("modal",
P_("Modal"),
P_("Whether the popover is modal"),
TRUE,
GTK_PARAM_READWRITE));
quark_widget_popovers = g_quark_from_static_string ("gtk-quark-widget-popovers");
}
static void
_gtk_popover_update_context_parent (GtkPopover *popover)
{
GtkStyleContext *context, *parent_context = NULL;
GtkPopoverPrivate *priv = popover->priv;
context = gtk_widget_get_style_context (GTK_WIDGET (popover));
if (priv->widget)
parent_context = gtk_widget_get_style_context (priv->widget);
gtk_style_context_set_parent (context, parent_context);
}
static void
_gtk_popover_parent_hierarchy_changed (GtkWidget *widget,
GtkWidget *previous_toplevel,
GtkPopover *popover)
{
GtkPopoverPrivate *priv;
GtkWindow *new_window;
priv = popover->priv;
new_window = GTK_WINDOW (gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW));
if (priv->window == new_window)
return;
g_object_ref (popover);
if (priv->window)
_gtk_window_remove_popover (priv->window, GTK_WIDGET (popover));
if (new_window)
_gtk_window_add_popover (new_window, GTK_WIDGET (popover));
priv->window = new_window;
if (new_window)
gtk_popover_update_position (popover);
_gtk_popover_update_context_parent (popover);
if (gtk_widget_is_visible (GTK_WIDGET (popover)))
gtk_widget_queue_resize (GTK_WIDGET (popover));
g_object_unref (popover);
}
static void
_gtk_popover_parent_unmap (GtkWidget *widget,
GtkPopover *popover)
{
gtk_widget_unmap (GTK_WIDGET (popover));
}
static void
_gtk_popover_parent_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GtkPopover *popover)
{
gtk_popover_update_position (popover);
}
static void
widget_manage_popover (GtkWidget *widget,
GtkPopover *popover)
{
GHashTable *popovers;
popovers = g_object_get_qdata (G_OBJECT (widget), quark_widget_popovers);
if (G_UNLIKELY (!popovers))
{
popovers = g_hash_table_new_full (NULL, NULL,
(GDestroyNotify) g_object_unref, NULL);
g_object_set_qdata_full (G_OBJECT (widget),
quark_widget_popovers, popovers,
(GDestroyNotify) g_hash_table_unref);
}
g_hash_table_add (popovers, g_object_ref_sink (popover));
}
static void
widget_unmanage_popover (GtkWidget *widget,
GtkPopover *popover)
{
GHashTable *popovers;
popovers = g_object_get_qdata (G_OBJECT (widget), quark_widget_popovers);
if (G_UNLIKELY (!popovers))
return;
g_hash_table_remove (popovers, popover);
}
static void
adjustment_changed_cb (GtkAdjustment *adjustment,
GtkPopover *popover)
{
gtk_popover_update_position (popover);
}
static void
_gtk_popover_set_scrollable (GtkPopover *popover,
GtkScrollable *scrollable)
{
GtkPopoverPrivate *priv;
priv = popover->priv;
if (priv->parent_scrollable)
{
if (priv->vadj)
{
g_signal_handlers_disconnect_by_data (priv->vadj, popover);
g_object_unref (priv->vadj);
priv->vadj = NULL;
}
if (priv->hadj)
{
g_signal_handlers_disconnect_by_data (priv->hadj, popover);
g_object_unref (priv->hadj);
priv->hadj = NULL;
}
}
priv->parent_scrollable = scrollable;
if (scrollable)
{
priv->vadj = gtk_scrollable_get_vadjustment (scrollable);
priv->hadj = gtk_scrollable_get_hadjustment (scrollable);
if (priv->vadj)
{
g_object_ref (priv->vadj);
g_signal_connect (priv->vadj, "changed",
G_CALLBACK (adjustment_changed_cb), popover);
g_signal_connect (priv->vadj, "value-changed",
G_CALLBACK (adjustment_changed_cb), popover);
}
if (priv->hadj)
{
g_object_ref (priv->hadj);
g_signal_connect (priv->hadj, "changed",
G_CALLBACK (adjustment_changed_cb), popover);
g_signal_connect (priv->hadj, "value-changed",
G_CALLBACK (adjustment_changed_cb), popover);
}
}
}
static void
scrollable_notify_cb (GObject *object,
GParamSpec *pspec,
GtkPopover *popover)
{
if (pspec->value_type == GTK_TYPE_ADJUSTMENT)
_gtk_popover_set_scrollable (popover, GTK_SCROLLABLE (object));
}
static void
gtk_popover_update_relative_to (GtkPopover *popover,
GtkWidget *relative_to)
{
GtkScrollable *scrollable = NULL;
GtkPopoverPrivate *priv;
priv = popover->priv;
if (priv->widget == relative_to)
return;
g_object_ref (popover);
if (priv->window)
{
_gtk_window_remove_popover (priv->window, GTK_WIDGET (popover));
priv->window = NULL;
}
if (priv->widget)
{
if (g_signal_handler_is_connected (priv->widget, priv->hierarchy_changed_id))
g_signal_handler_disconnect (priv->widget, priv->hierarchy_changed_id);
if (g_signal_handler_is_connected (priv->widget, priv->size_allocate_id))
g_signal_handler_disconnect (priv->widget, priv->size_allocate_id);
if (g_signal_handler_is_connected (priv->widget, priv->unmap_id))
g_signal_handler_disconnect (priv->widget, priv->unmap_id);
widget_unmanage_popover (priv->widget, popover);
}
if (priv->parent_scrollable)
{
if (g_signal_handler_is_connected (priv->parent_scrollable, priv->scrollable_notify_id))
g_signal_handler_disconnect (priv->parent_scrollable, priv->scrollable_notify_id);
_gtk_popover_set_scrollable (popover, NULL);
}
priv->widget = relative_to;
g_object_notify (G_OBJECT (popover), "relative-to");
if (priv->widget)
{
priv->window =
GTK_WINDOW (gtk_widget_get_ancestor (priv->widget, GTK_TYPE_WINDOW));
priv->hierarchy_changed_id =
g_signal_connect (priv->widget, "hierarchy-changed",
G_CALLBACK (_gtk_popover_parent_hierarchy_changed),
popover);
priv->size_allocate_id =
g_signal_connect (priv->widget, "size-allocate",
G_CALLBACK (_gtk_popover_parent_size_allocate),
popover);
priv->unmap_id =
g_signal_connect (priv->widget, "unmap",
G_CALLBACK (_gtk_popover_parent_unmap),
popover);
/* Give ownership of the popover to widget */
widget_manage_popover (priv->widget, popover);
}
if (priv->window)
_gtk_window_add_popover (priv->window, GTK_WIDGET (popover));
if (relative_to)
scrollable = GTK_SCROLLABLE (gtk_widget_get_ancestor (priv->widget, GTK_TYPE_SCROLLABLE));
if (scrollable)
{
_gtk_popover_set_scrollable (popover, scrollable);
priv->scrollable_notify_id =
g_signal_connect (priv->parent_scrollable, "notify",
G_CALLBACK (scrollable_notify_cb), popover);
}
_gtk_popover_update_context_parent (popover);
g_object_unref (popover);
}
static void
gtk_popover_update_pointing_to (GtkPopover *popover,
cairo_rectangle_int_t *pointing_to)
{
GtkPopoverPrivate *priv;
priv = popover->priv;
if (pointing_to)
{
priv->pointing_to = *pointing_to;
priv->has_pointing_to = TRUE;
}
else
priv->has_pointing_to = FALSE;
g_object_notify (G_OBJECT (popover), "pointing-to");
}
static void
gtk_popover_update_preferred_position (GtkPopover *popover,
GtkPositionType position)
{
GtkPopoverPrivate *priv;
priv = popover->priv;
priv->preferred_position = position;
g_object_notify (G_OBJECT (popover), "position");
}
/**
* gtk_popover_new:
* @relative_to: #GtkWidget the popover is related to
*
* Creates a new popover to point to @relative_to
*
* Returns: a new #GtkPopover
*
* Since: 3.12
**/
GtkWidget *
gtk_popover_new (GtkWidget *relative_to)
{
return g_object_new (GTK_TYPE_POPOVER,
"relative-to", relative_to,
NULL);
}
/**
* gtk_popover_set_relative_to:
* @popover: a #GtkPopover
* @relative_to: a #GtkWidget
*
* Sets a new widget to be attached to @popover. If @popover is
* visible, the position will be updated.
*
* Since: 3.12
**/
void
gtk_popover_set_relative_to (GtkPopover *popover,
GtkWidget *relative_to)
{
g_return_if_fail (GTK_IS_POPOVER (popover));
g_return_if_fail (GTK_IS_WIDGET (relative_to));
gtk_popover_update_relative_to (popover, relative_to);
gtk_popover_update_position (popover);
}
/**
* gtk_popover_get_relative_to:
* @popover: a #GtkPopover
*
* Returns the wigdet @popover is currently attached to
*
* Returns: (transfer none): a #GtkWidget
*
* Since: 3.12
**/
GtkWidget *
gtk_popover_get_relative_to (GtkPopover *popover)
{
GtkPopoverPrivate *priv;
g_return_val_if_fail (GTK_IS_POPOVER (popover), NULL);
priv = popover->priv;
return priv->widget;
}
/**
* gtk_popover_set_pointing_to:
* @popover: a #GtkPopover
* @rect: rectangle to point to
*
* Sets the rectangle that @popover will point to, in the coordinate
* space of the widget @popover is attached to, see
* gtk_popover_set_relative_to()
*
* Since: 3.12
**/
void
gtk_popover_set_pointing_to (GtkPopover *popover,
cairo_rectangle_int_t *rect)
{
g_return_if_fail (GTK_IS_POPOVER (popover));
g_return_if_fail (rect != NULL);
gtk_popover_update_pointing_to (popover, rect);
gtk_popover_update_position (popover);
}
/**
* gtk_popover_get_pointing_to:
* @popover: a #GtkPopover
* @rect: (out): location to store the rectangle
*
* If a rectangle to point to has been set, this function will
* return %TRUE and fill in @rect with such rectangle, otherwise
* it will return %FALSE and fill in @rect with the attached
* widget coordinates.
*
* Returns: %TRUE if a rectangle to point to was set.
**/
gboolean
gtk_popover_get_pointing_to (GtkPopover *popover,
cairo_rectangle_int_t *rect)
{
GtkPopoverPrivate *priv;
g_return_val_if_fail (GTK_IS_POPOVER (popover), FALSE);
priv = popover->priv;
if (rect)
{
if (priv->has_pointing_to)
*rect = priv->pointing_to;
else if (priv->widget)
{
gtk_widget_get_allocation (priv->widget, rect);
rect->x = rect->y = 0;
}
}
return priv->has_pointing_to;
}
/**
* gtk_popover_set_position:
* @popover: a #GtkPopover
* @position: preferred popover position
*
* Sets the preferred position for @popover to appear. If the @popover
* is currently visible, it will be immediately updated.
*
* <note>
* This preference will be respected where possible, although
* on lack of space (eg. if close to the window edges), the
* #GtkPopover may choose to appear on the opposite side
* </note>
*
* Since: 3.12
**/
void
gtk_popover_set_position (GtkPopover *popover,
GtkPositionType position)
{
g_return_if_fail (GTK_IS_POPOVER (popover));
g_return_if_fail (position >= GTK_POS_LEFT && position <= GTK_POS_BOTTOM);
gtk_popover_update_preferred_position (popover, position);
gtk_popover_update_position (popover);
}
/**
* gtk_popover_get_position:
* @popover: a #GtkPopover
*
* Returns the preferred position of @popover.
*
* Returns: The preferred position.
**/
GtkPositionType
gtk_popover_get_position (GtkPopover *popover)
{
GtkPopoverPrivate *priv;
g_return_val_if_fail (GTK_IS_POPOVER (popover), GTK_POS_TOP);
priv = popover->priv;
return priv->preferred_position;
}
/**
* gtk_popover_set_modal:
* @popover: a #GtkPopover
* @modal: #TRUE to make popover claim all input within the toplevel
*
* Sets whether @popover is modal, a modal popover will grab all input
* within the toplevel and grab the keyboard focus on it when being
* displayed. Clicking outside the popover area or pressing Esc will
* dismiss the popover and ungrab input.
*
* Since: 3.12
**/
void
gtk_popover_set_modal (GtkPopover *popover,
gboolean modal)
{
GtkPopoverPrivate *priv;
g_return_if_fail (GTK_IS_POPOVER (popover));
priv = popover->priv;
if ((priv->modal == TRUE) == (modal == TRUE))
return;
priv->modal = (modal != FALSE);
if (gtk_widget_is_visible (GTK_WIDGET (popover)))
gtk_popover_apply_modality (popover, priv->modal);
g_object_notify (G_OBJECT (popover), "modal");
}
/**
* gtk_popover_get_modal:
* @popover: a #GtkPopover
*
* Returns whether the popover is modal, see gtk_popover_set_modal to
* see the implications of this.
*
* Returns: #TRUE if @popover is modal
*
* Since: 3.12
**/
gboolean
gtk_popover_get_modal (GtkPopover *popover)
{
GtkPopoverPrivate *priv;
g_return_val_if_fail (GTK_IS_POPOVER (popover), FALSE);
priv = popover->priv;
return priv->modal;
}
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