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gtk2/gtk/gtklayout.c
Tristan Van Berkom 3fe0fb4ed9 Added GtkScrollablePolicy property to scrollable interface 
This patch adds the GtkScrollablePolicy type property to GtkScrollable
and implements it in all subclasses. GtkScrolledWindow observes this
property to make a good guess about when to show/hide scrollbars for
height-for-width content.

Most scrollable children do not do height-for-width *yet* but
most certainly will (toolpalette, treeview, iconview, textview
widgets all TODO), for scrollable widgets that do have a minimum
and natural size, it's important for them to observe the state
of this property in order to properly drive the scroll adjustments
according to the desired GtkScrollablePolicy. This patch makes
GtkViewport do this.

Patch also adds tests/testscrolledwindow.c to display the effects
of this property.
2010-10-26 10:15:56 +09:00

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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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* 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"
#undef GTK_DISABLE_DEPRECATED
#include "gtklayout.h"
#include "gdkconfig.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkscrollable.h"
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_size_request (GtkWidget *widget,
GtkRequisition *requisition);
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_set (GtkWidget *widget,
GtkStyle *old_style);
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_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.
*
* Return value: 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.
*
* Return value: (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.
*
* Return value: (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.
*
* Return value: (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);
}
/**
* 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)
{
GtkLayoutPrivate *priv;
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
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_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)
{
GtkLayoutPrivate *priv;
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
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");
}
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: (allow-none): location to store the width set on @layout, or %NULL
* @height: (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_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));
widget_class->realize = gtk_layout_realize;
widget_class->unrealize = gtk_layout_unrealize;
widget_class->map = gtk_layout_map;
widget_class->size_request = gtk_layout_size_request;
widget_class->size_allocate = gtk_layout_size_allocate;
widget_class->draw = gtk_layout_draw;
widget_class->style_set = gtk_layout_style_set;
container_class->add = gtk_layout_add;
container_class->remove = gtk_layout_remove;
container_class->forall = gtk_layout_forall;
g_type_class_add_private (class, sizeof (GtkLayoutPrivate));
}
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_set_hadjustment (layout,
(GtkAdjustment*) g_value_get_object (value));
break;
case PROP_VADJUSTMENT:
gtk_layout_set_vadjustment (layout,
(GtkAdjustment*) g_value_get_object (value));
break;
case PROP_HSCROLL_POLICY:
priv->hscroll_policy = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (layout));
break;
case PROP_VSCROLL_POLICY:
priv->vscroll_policy = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (layout));
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 = G_TYPE_INSTANCE_GET_PRIVATE (layout,
GTK_TYPE_LAYOUT,
GtkLayoutPrivate);
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
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);
gdk_window_set_user_data (window, widget);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = - priv->hadjustment->value,
attributes.y = - priv->vadjustment->value;
attributes.width = MAX (priv->width, allocation.width);
attributes.height = MAX (priv->height, allocation.height);
attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK |
gtk_widget_get_events (widget);
priv->bin_window = gdk_window_new (window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->bin_window, widget);
gtk_widget_style_attach (widget);
gtk_style_set_background (gtk_widget_get_style (widget), priv->bin_window, GTK_STATE_NORMAL);
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_set (GtkWidget *widget,
GtkStyle *old_style)
{
GtkLayoutPrivate *priv;
GTK_WIDGET_CLASS (gtk_layout_parent_class)->style_set (widget, old_style);
if (gtk_widget_get_realized (widget))
{
priv = GTK_LAYOUT (widget)->priv;
gtk_style_set_background (gtk_widget_get_style (widget), priv->bin_window, GTK_STATE_NORMAL);
}
}
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;
gdk_window_set_user_data (priv->bin_window, NULL);
gdk_window_destroy (priv->bin_window);
priv->bin_window = NULL;
GTK_WIDGET_CLASS (gtk_layout_parent_class)->unrealize (widget);
}
static void
gtk_layout_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
requisition->width = 0;
requisition->height = 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,
- priv->hadjustment->value,
- priv->vadjustment->value);
gdk_window_process_updates (priv->bin_window, TRUE);
}
}
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