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gtk2/gtk/gtklayout.c
Cosimo Cecchi a9b45e7c3c layout: add a comment for gtk_style_context_set_background() 
And wrap it with G_GNUC_IGNORE_DEPRECATIONS.
Unfortunately we can't stop rendering the background altogether here.
Also, refactor some common code in a single function.
2015-07-01 16:09:23 -07:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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/>.
*
* GtkLayout: Widget for scrolling of arbitrary-sized areas.
*
* Copyright Owen Taylor, 1998
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtklayout.h"
#include "gdk/gdk.h"
#include "gtkadjustment.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkscrollable.h"
/**
* SECTION:gtklayout
* @Short_description: Infinite scrollable area containing child widgets
* and/or custom drawing
* @Title: GtkLayout
* @See_also: #GtkDrawingArea, #GtkScrolledWindow
*
* #GtkLayout is similar to #GtkDrawingArea in that it’s a “blank slate”
* and doesn’t do anything but paint a blank background by default. It's
* different in that it supports scrolling natively (you can add it to a
* #GtkScrolledWindow), and it can contain child widgets, since it’s a
* #GtkContainer. However if you’re just going to draw, a #GtkDrawingArea
* is a better choice since it has lower overhead.
*
* When handling expose events on a #GtkLayout, you must draw to
* GTK_LAYOUT (layout)->bin_window, rather than to
* GTK_WIDGET (layout)->window, as you would for a drawing
* area.
*/
typedef struct _GtkLayoutChild GtkLayoutChild;
struct _GtkLayoutPrivate
{
/* Properties */
guint width;
guint height;
GtkAdjustment *hadjustment;
GtkAdjustment *vadjustment;
/* GtkScrollablePolicy needs to be checked when
* driving the scrollable adjustment values */
guint hscroll_policy : 1;
guint vscroll_policy : 1;
/* Properties */
GdkVisibilityState visibility;
GdkWindow *bin_window;
GList *children;
gint scroll_x;
gint scroll_y;
guint freeze_count;
};
struct _GtkLayoutChild {
GtkWidget *widget;
gint x;
gint y;
};
enum {
PROP_0,
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
PROP_HSCROLL_POLICY,
PROP_VSCROLL_POLICY,
PROP_WIDTH,
PROP_HEIGHT
};
enum {
CHILD_PROP_0,
CHILD_PROP_X,
CHILD_PROP_Y
};
static void gtk_layout_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_layout_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_layout_finalize (GObject *object);
static void gtk_layout_realize (GtkWidget *widget);
static void gtk_layout_unrealize (GtkWidget *widget);
static void gtk_layout_map (GtkWidget *widget);
static void gtk_layout_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_layout_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_layout_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_layout_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_layout_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_layout_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_layout_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_layout_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_layout_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_layout_allocate_child (GtkLayout *layout,
GtkLayoutChild *child);
static void gtk_layout_adjustment_changed (GtkAdjustment *adjustment,
GtkLayout *layout);
static void gtk_layout_style_updated (GtkWidget *widget);
static void gtk_layout_set_hadjustment_values (GtkLayout *layout);
static void gtk_layout_set_vadjustment_values (GtkLayout *layout);
G_DEFINE_TYPE_WITH_CODE (GtkLayout, gtk_layout, GTK_TYPE_CONTAINER,
G_ADD_PRIVATE (GtkLayout)
G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
/* Public interface
*/
/**
* gtk_layout_new:
* @hadjustment: (allow-none): horizontal scroll adjustment, or %NULL
* @vadjustment: (allow-none): vertical scroll adjustment, or %NULL
*
* Creates a new #GtkLayout. Unless you have a specific adjustment
* you’d like the layout to use for scrolling, pass %NULL for
* @hadjustment and @vadjustment.
*
* Returns: a new #GtkLayout
**/
GtkWidget*
gtk_layout_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
GtkLayout *layout;
layout = g_object_new (GTK_TYPE_LAYOUT,
"hadjustment", hadjustment,
"vadjustment", vadjustment,
NULL);
return GTK_WIDGET (layout);
}
/**
* gtk_layout_get_bin_window:
* @layout: a #GtkLayout
*
* Retrieve the bin window of the layout used for drawing operations.
*
* Returns: (transfer none): a #GdkWindow
*
* Since: 2.14
**/
GdkWindow*
gtk_layout_get_bin_window (GtkLayout *layout)
{
g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
return layout->priv->bin_window;
}
/**
* gtk_layout_get_hadjustment:
* @layout: a #GtkLayout
*
* This function should only be called after the layout has been
* placed in a #GtkScrolledWindow or otherwise configured for
* scrolling. It returns the #GtkAdjustment used for communication
* between the horizontal scrollbar and @layout.
*
* See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
*
* Returns: (transfer none): horizontal scroll adjustment
*
* Deprecated: 3.0: Use gtk_scrollable_get_hadjustment()
**/
GtkAdjustment*
gtk_layout_get_hadjustment (GtkLayout *layout)
{
g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
return layout->priv->hadjustment;
}
/**
* gtk_layout_get_vadjustment:
* @layout: a #GtkLayout
*
* This function should only be called after the layout has been
* placed in a #GtkScrolledWindow or otherwise configured for
* scrolling. It returns the #GtkAdjustment used for communication
* between the vertical scrollbar and @layout.
*
* See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
*
* Returns: (transfer none): vertical scroll adjustment
*
* Deprecated: 3.0: Use gtk_scrollable_get_vadjustment()
**/
GtkAdjustment*
gtk_layout_get_vadjustment (GtkLayout *layout)
{
g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
return layout->priv->vadjustment;
}
static void
gtk_layout_set_hadjustment_values (GtkLayout *layout)
{
GtkLayoutPrivate *priv = layout->priv;
GtkAllocation allocation;
GtkAdjustment *adj = priv->hadjustment;
gdouble old_value;
gdouble new_value;
gdouble new_upper;
gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
old_value = gtk_adjustment_get_value (adj);
new_upper = MAX (allocation.width, priv->width);
g_object_set (adj,
"lower", 0.0,
"upper", new_upper,
"page-size", (gdouble)allocation.width,
"step-increment", allocation.width * 0.1,
"page-increment", allocation.width * 0.9,
NULL);
new_value = CLAMP (old_value, 0, new_upper - allocation.width);
if (new_value != old_value)
gtk_adjustment_set_value (adj, new_value);
}
static void
gtk_layout_set_vadjustment_values (GtkLayout *layout)
{
GtkAllocation allocation;
GtkAdjustment *adj = layout->priv->vadjustment;
gdouble old_value;
gdouble new_value;
gdouble new_upper;
gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
old_value = gtk_adjustment_get_value (adj);
new_upper = MAX (allocation.height, layout->priv->height);
g_object_set (adj,
"lower", 0.0,
"upper", new_upper,
"page-size", (gdouble)allocation.height,
"step-increment", allocation.height * 0.1,
"page-increment", allocation.height * 0.9,
NULL);
new_value = CLAMP (old_value, 0, new_upper - allocation.height);
if (new_value != old_value)
gtk_adjustment_set_value (adj, new_value);
}
static void
gtk_layout_finalize (GObject *object)
{
GtkLayout *layout = GTK_LAYOUT (object);
GtkLayoutPrivate *priv = layout->priv;
g_object_unref (priv->hadjustment);
g_object_unref (priv->vadjustment);
G_OBJECT_CLASS (gtk_layout_parent_class)->finalize (object);
}
static void
gtk_layout_do_set_hadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
GtkLayoutPrivate *priv;
priv = layout->priv;
if (adjustment && priv->hadjustment == adjustment)
return;
if (priv->hadjustment != NULL)
{
g_signal_handlers_disconnect_by_func (priv->hadjustment,
gtk_layout_adjustment_changed,
layout);
g_object_unref (priv->hadjustment);
}
if (adjustment == NULL)
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
g_signal_connect (adjustment, "value-changed",
G_CALLBACK (gtk_layout_adjustment_changed), layout);
priv->hadjustment = g_object_ref_sink (adjustment);
gtk_layout_set_hadjustment_values (layout);
g_object_notify (G_OBJECT (layout), "hadjustment");
}
/**
* gtk_layout_set_hadjustment:
* @layout: a #GtkLayout
* @adjustment: (allow-none): new scroll adjustment
*
* Sets the horizontal scroll adjustment for the layout.
*
* See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
*
* Deprecated: 3.0: Use gtk_scrollable_set_hadjustment()
**/
void
gtk_layout_set_hadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
gtk_layout_do_set_hadjustment (layout, adjustment);
}
static void
gtk_layout_do_set_vadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
GtkLayoutPrivate *priv;
priv = layout->priv;
if (adjustment && priv->vadjustment == adjustment)
return;
if (priv->vadjustment != NULL)
{
g_signal_handlers_disconnect_by_func (priv->vadjustment,
gtk_layout_adjustment_changed,
layout);
g_object_unref (priv->vadjustment);
}
if (adjustment == NULL)
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
g_signal_connect (adjustment, "value-changed",
G_CALLBACK (gtk_layout_adjustment_changed), layout);
priv->vadjustment = g_object_ref_sink (adjustment);
gtk_layout_set_vadjustment_values (layout);
g_object_notify (G_OBJECT (layout), "vadjustment");
}
/**
* gtk_layout_set_vadjustment:
* @layout: a #GtkLayout
* @adjustment: (allow-none): new scroll adjustment
*
* Sets the vertical scroll adjustment for the layout.
*
* See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
*
* Deprecated: 3.0: Use gtk_scrollable_set_vadjustment()
**/
void
gtk_layout_set_vadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
gtk_layout_do_set_vadjustment (layout, adjustment);
}
static GtkLayoutChild*
get_child (GtkLayout *layout,
GtkWidget *widget)
{
GtkLayoutPrivate *priv = layout->priv;
GList *children;
children = priv->children;
while (children)
{
GtkLayoutChild *child;
child = children->data;
children = children->next;
if (child->widget == widget)
return child;
}
return NULL;
}
/**
* gtk_layout_put:
* @layout: a #GtkLayout
* @child_widget: child widget
* @x: X position of child widget
* @y: Y position of child widget
*
* Adds @child_widget to @layout, at position (@x,@y).
* @layout becomes the new parent container of @child_widget.
*
**/
void
gtk_layout_put (GtkLayout *layout,
GtkWidget *child_widget,
gint x,
gint y)
{
GtkLayoutPrivate *priv;
GtkLayoutChild *child;
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (GTK_IS_WIDGET (child_widget));
priv = layout->priv;
child = g_new (GtkLayoutChild, 1);
child->widget = child_widget;
child->x = x;
child->y = y;
priv->children = g_list_append (priv->children, child);
if (gtk_widget_get_realized (GTK_WIDGET (layout)))
gtk_widget_set_parent_window (child->widget, priv->bin_window);
gtk_widget_set_parent (child_widget, GTK_WIDGET (layout));
}
static void
gtk_layout_move_internal (GtkLayout *layout,
GtkWidget *widget,
gboolean change_x,
gint x,
gboolean change_y,
gint y)
{
GtkLayoutChild *child;
child = get_child (layout, widget);
g_assert (child);
gtk_widget_freeze_child_notify (widget);
if (change_x)
{
child->x = x;
gtk_widget_child_notify (widget, "x");
}
if (change_y)
{
child->y = y;
gtk_widget_child_notify (widget, "y");
}
gtk_widget_thaw_child_notify (widget);
if (gtk_widget_get_visible (widget) &&
gtk_widget_get_visible (GTK_WIDGET (layout)))
gtk_widget_queue_resize (widget);
}
/**
* gtk_layout_move:
* @layout: a #GtkLayout
* @child_widget: a current child of @layout
* @x: X position to move to
* @y: Y position to move to
*
* Moves a current child of @layout to a new position.
*
**/
void
gtk_layout_move (GtkLayout *layout,
GtkWidget *child_widget,
gint x,
gint y)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (GTK_IS_WIDGET (child_widget));
g_return_if_fail (gtk_widget_get_parent (child_widget) == GTK_WIDGET (layout));
gtk_layout_move_internal (layout, child_widget, TRUE, x, TRUE, y);
}
/**
* gtk_layout_set_size:
* @layout: a #GtkLayout
* @width: width of entire scrollable area
* @height: height of entire scrollable area
*
* Sets the size of the scrollable area of the layout.
*
**/
void
gtk_layout_set_size (GtkLayout *layout,
guint width,
guint height)
{
GtkLayoutPrivate *priv;
GtkWidget *widget;
g_return_if_fail (GTK_IS_LAYOUT (layout));
priv = layout->priv;
widget = GTK_WIDGET (layout);
g_object_freeze_notify (G_OBJECT (layout));
if (width != priv->width)
{
priv->width = width;
g_object_notify (G_OBJECT (layout), "width");
}
if (height != priv->height)
{
priv->height = height;
g_object_notify (G_OBJECT (layout), "height");
}
g_object_thaw_notify (G_OBJECT (layout));
if (gtk_widget_get_realized (widget))
{
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
width = MAX (width, allocation.width);
height = MAX (height, allocation.height);
gdk_window_resize (priv->bin_window, width, height);
}
gtk_layout_set_hadjustment_values (layout);
gtk_layout_set_vadjustment_values (layout);
}
/**
* gtk_layout_get_size:
* @layout: a #GtkLayout
* @width: (out) (allow-none): location to store the width set on
* @layout, or %NULL
* @height: (out) (allow-none): location to store the height set on
* @layout, or %NULL
*
* Gets the size that has been set on the layout, and that determines
* the total extents of the layout’s scrollbar area. See
* gtk_layout_set_size ().
**/
void
gtk_layout_get_size (GtkLayout *layout,
guint *width,
guint *height)
{
GtkLayoutPrivate *priv;
g_return_if_fail (GTK_IS_LAYOUT (layout));
priv = layout->priv;
if (width)
*width = priv->width;
if (height)
*height = priv->height;
}
/* Basic Object handling procedures
*/
static void
gtk_layout_class_init (GtkLayoutClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
gobject_class->set_property = gtk_layout_set_property;
gobject_class->get_property = gtk_layout_get_property;
gobject_class->finalize = gtk_layout_finalize;
container_class->set_child_property = gtk_layout_set_child_property;
container_class->get_child_property = gtk_layout_get_child_property;
gtk_container_class_install_child_property (container_class,
CHILD_PROP_X,
g_param_spec_int ("x",
P_("X position"),
P_("X position of child widget"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_Y,
g_param_spec_int ("y",
P_("Y position"),
P_("Y position of child widget"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
/* Scrollable interface */
g_object_class_override_property (gobject_class, PROP_HADJUSTMENT, "hadjustment");
g_object_class_override_property (gobject_class, PROP_VADJUSTMENT, "vadjustment");
g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
g_object_class_install_property (gobject_class,
PROP_WIDTH,
g_param_spec_uint ("width",
P_("Width"),
P_("The width of the layout"),
0,
G_MAXINT,
100,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (gobject_class,
PROP_HEIGHT,
g_param_spec_uint ("height",
P_("Height"),
P_("The height of the layout"),
0,
G_MAXINT,
100,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
widget_class->realize = gtk_layout_realize;
widget_class->unrealize = gtk_layout_unrealize;
widget_class->map = gtk_layout_map;
widget_class->get_preferred_width = gtk_layout_get_preferred_width;
widget_class->get_preferred_height = gtk_layout_get_preferred_height;
widget_class->size_allocate = gtk_layout_size_allocate;
widget_class->draw = gtk_layout_draw;
widget_class->style_updated = gtk_layout_style_updated;
container_class->add = gtk_layout_add;
container_class->remove = gtk_layout_remove;
container_class->forall = gtk_layout_forall;
}
static void
gtk_layout_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLayout *layout = GTK_LAYOUT (object);
GtkLayoutPrivate *priv = layout->priv;
switch (prop_id)
{
case PROP_HADJUSTMENT:
g_value_set_object (value, priv->hadjustment);
break;
case PROP_VADJUSTMENT:
g_value_set_object (value, priv->vadjustment);
break;
case PROP_HSCROLL_POLICY:
g_value_set_enum (value, priv->hscroll_policy);
break;
case PROP_VSCROLL_POLICY:
g_value_set_enum (value, priv->vscroll_policy);
break;
case PROP_WIDTH:
g_value_set_uint (value, priv->width);
break;
case PROP_HEIGHT:
g_value_set_uint (value, priv->height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_layout_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkLayout *layout = GTK_LAYOUT (object);
GtkLayoutPrivate *priv = layout->priv;
switch (prop_id)
{
case PROP_HADJUSTMENT:
gtk_layout_do_set_hadjustment (layout, g_value_get_object (value));
break;
case PROP_VADJUSTMENT:
gtk_layout_do_set_vadjustment (layout, g_value_get_object (value));
break;
case PROP_HSCROLL_POLICY:
if (priv->hscroll_policy != g_value_get_enum (value))
{
priv->hscroll_policy = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (layout));
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_VSCROLL_POLICY:
if (priv->vscroll_policy != g_value_get_enum (value))
{
priv->vscroll_policy = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (layout));
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_WIDTH:
gtk_layout_set_size (layout, g_value_get_uint (value), priv->height);
break;
case PROP_HEIGHT:
gtk_layout_set_size (layout, priv->width, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_layout_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case CHILD_PROP_X:
gtk_layout_move_internal (GTK_LAYOUT (container),
child,
TRUE, g_value_get_int (value),
FALSE, 0);
break;
case CHILD_PROP_Y:
gtk_layout_move_internal (GTK_LAYOUT (container),
child,
FALSE, 0,
TRUE, g_value_get_int (value));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_layout_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkLayoutChild *layout_child;
layout_child = get_child (GTK_LAYOUT (container), child);
switch (property_id)
{
case CHILD_PROP_X:
g_value_set_int (value, layout_child->x);
break;
case CHILD_PROP_Y:
g_value_set_int (value, layout_child->y);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_layout_init (GtkLayout *layout)
{
GtkLayoutPrivate *priv;
layout->priv = gtk_layout_get_instance_private (layout);
priv = layout->priv;
priv->children = NULL;
priv->width = 100;
priv->height = 100;
priv->hadjustment = NULL;
priv->vadjustment = NULL;
priv->bin_window = NULL;
priv->scroll_x = 0;
priv->scroll_y = 0;
priv->visibility = GDK_VISIBILITY_PARTIAL;
priv->freeze_count = 0;
}
/* Widget methods
*/
static void
set_background (GtkWidget *widget)
{
GtkLayoutPrivate *priv;
if (gtk_widget_get_realized (widget))
{
priv = GTK_LAYOUT (widget)->priv;
/* We still need to call gtk_style_context_set_background() here for
* GtkLayout, since subclasses like EelCanvas depend on a background to
* be set since the beginning of the draw() implementation.
* This should be revisited next time we have a major API break.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_style_context_set_background (gtk_widget_get_style_context (widget), priv->bin_window);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static void
gtk_layout_realize (GtkWidget *widget)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPrivate *priv = layout->priv;
GtkAllocation allocation;
GdkWindow *window;
GdkWindowAttr attributes;
GList *tmp_list;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = GDK_VISIBILITY_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_get_allocation (widget, &allocation);
attributes.x = - gtk_adjustment_get_value (priv->hadjustment),
attributes.y = - gtk_adjustment_get_value (priv->vadjustment);
attributes.width = MAX (priv->width, allocation.width);
attributes.height = MAX (priv->height, allocation.height);
attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK |
GDK_SMOOTH_SCROLL_MASK |
gtk_widget_get_events (widget);
priv->bin_window = gdk_window_new (window,
&attributes, attributes_mask);
gtk_widget_register_window (widget, priv->bin_window);
set_background (widget);
tmp_list = priv->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
gtk_widget_set_parent_window (child->widget, priv->bin_window);
}
}
static void
gtk_layout_style_updated (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_layout_parent_class)->style_updated (widget);
set_background (widget);
}
static void
gtk_layout_map (GtkWidget *widget)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPrivate *priv = layout->priv;
GList *tmp_list;
gtk_widget_set_mapped (widget, TRUE);
tmp_list = priv->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
if (gtk_widget_get_visible (child->widget))
{
if (!gtk_widget_get_mapped (child->widget))
gtk_widget_map (child->widget);
}
}
gdk_window_show (priv->bin_window);
gdk_window_show (gtk_widget_get_window (widget));
}
static void
gtk_layout_unrealize (GtkWidget *widget)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPrivate *priv = layout->priv;
gtk_widget_unregister_window (widget, priv->bin_window);
gdk_window_destroy (priv->bin_window);
priv->bin_window = NULL;
GTK_WIDGET_CLASS (gtk_layout_parent_class)->unrealize (widget);
}
static void
gtk_layout_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
*minimum = *natural = 0;
}
static void
gtk_layout_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
*minimum = *natural = 0;
}
static void
gtk_layout_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPrivate *priv = layout->priv;
GList *tmp_list;
gtk_widget_set_allocation (widget, allocation);
tmp_list = priv->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
gtk_layout_allocate_child (layout, child);
}
if (gtk_widget_get_realized (widget))
{
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_window_resize (priv->bin_window,
MAX (priv->width, allocation->width),
MAX (priv->height, allocation->height));
}
gtk_layout_set_hadjustment_values (layout);
gtk_layout_set_vadjustment_values (layout);
}
static gboolean
gtk_layout_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPrivate *priv = layout->priv;
if (gtk_cairo_should_draw_window (cr, priv->bin_window))
GTK_WIDGET_CLASS (gtk_layout_parent_class)->draw (widget, cr);
return FALSE;
}
/* Container methods
*/
static void
gtk_layout_add (GtkContainer *container,
GtkWidget *widget)
{
gtk_layout_put (GTK_LAYOUT (container), widget, 0, 0);
}
static void
gtk_layout_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkLayout *layout = GTK_LAYOUT (container);
GtkLayoutPrivate *priv = layout->priv;
GList *tmp_list;
GtkLayoutChild *child = NULL;
tmp_list = priv->children;
while (tmp_list)
{
child = tmp_list->data;
if (child->widget == widget)
break;
tmp_list = tmp_list->next;
}
if (tmp_list)
{
gtk_widget_unparent (widget);
priv->children = g_list_remove_link (priv->children, tmp_list);
g_list_free_1 (tmp_list);
g_free (child);
}
}
static void
gtk_layout_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkLayout *layout = GTK_LAYOUT (container);
GtkLayoutPrivate *priv = layout->priv;
GtkLayoutChild *child;
GList *tmp_list;
tmp_list = priv->children;
while (tmp_list)
{
child = tmp_list->data;
tmp_list = tmp_list->next;
(* callback) (child->widget, callback_data);
}
}
/* Operations on children
*/
static void
gtk_layout_allocate_child (GtkLayout *layout,
GtkLayoutChild *child)
{
GtkAllocation allocation;
GtkRequisition requisition;
allocation.x = child->x;
allocation.y = child->y;
gtk_widget_get_preferred_size (child->widget, &requisition, NULL);
allocation.width = requisition.width;
allocation.height = requisition.height;
gtk_widget_size_allocate (child->widget, &allocation);
}
/* Callbacks */
static void
gtk_layout_adjustment_changed (GtkAdjustment *adjustment,
GtkLayout *layout)
{
GtkLayoutPrivate *priv = layout->priv;
if (priv->freeze_count)
return;
if (gtk_widget_get_realized (GTK_WIDGET (layout)))
{
gdk_window_move (priv->bin_window,
- gtk_adjustment_get_value (priv->hadjustment),
- gtk_adjustment_get_value (priv->vadjustment));
}
}
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