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gtk2/gtk/gtklayout.c

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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"
#include "gdkconfig.h"
#include "gtklayout.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
typedef struct _GtkLayoutChild GtkLayoutChild;
struct _GtkLayoutPriv
{
/* Properties */
guint width;
guint height;
GtkAdjustment *hadjustment;
GtkAdjustment *vadjustment;
/* 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_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 GObject *gtk_layout_constructor (GType type,
guint n_properties,
GObjectConstructParam *properties);
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_expose (GtkWidget *widget,
GdkEventExpose *event);
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_adjustments (GtkLayout *layout,
GtkAdjustment *hadj,
GtkAdjustment *vadj);
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_adjustment_upper (GtkAdjustment *adj,
gdouble upper,
gboolean always_emit_changed);
G_DEFINE_TYPE (GtkLayout, gtk_layout, GTK_TYPE_CONTAINER)
/* 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: 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: horizontal scroll adjustment
**/
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: vertical scroll adjustment
**/
GtkAdjustment*
gtk_layout_get_vadjustment (GtkLayout *layout)
{
g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
return layout->priv->vadjustment;
}
static GtkAdjustment *
new_default_adjustment (void)
{
return GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
}
static void
gtk_layout_set_adjustments (GtkLayout *layout,
GtkAdjustment *hadj,
GtkAdjustment *vadj)
{
GtkLayoutPriv *priv = layout->priv;
gboolean need_adjust = FALSE;
if (hadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
else if (priv->hadjustment)
hadj = new_default_adjustment ();
if (vadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
else if (priv->vadjustment)
vadj = new_default_adjustment ();
if (priv->hadjustment && (priv->hadjustment != hadj))
{
g_signal_handlers_disconnect_by_func (priv->hadjustment,
gtk_layout_adjustment_changed,
layout);
g_object_unref (priv->hadjustment);
}
if (priv->vadjustment && (priv->vadjustment != vadj))
{
g_signal_handlers_disconnect_by_func (priv->vadjustment,
gtk_layout_adjustment_changed,
layout);
g_object_unref (priv->vadjustment);
}
if (priv->hadjustment != hadj)
{
priv->hadjustment = hadj;
g_object_ref_sink (priv->hadjustment);
gtk_layout_set_adjustment_upper (priv->hadjustment, priv->width, FALSE);
g_signal_connect (priv->hadjustment, "value-changed",
G_CALLBACK (gtk_layout_adjustment_changed),
layout);
need_adjust = TRUE;
}
if (priv->vadjustment != vadj)
{
priv->vadjustment = vadj;
g_object_ref_sink (priv->vadjustment);
gtk_layout_set_adjustment_upper (priv->vadjustment, priv->height, FALSE);
g_signal_connect (priv->vadjustment, "value-changed",
G_CALLBACK (gtk_layout_adjustment_changed),
layout);
need_adjust = TRUE;
}
/* vadj or hadj can be NULL while constructing; don't emit a signal
then */
if (need_adjust && vadj && hadj)
gtk_layout_adjustment_changed (NULL, layout);
}
static void
gtk_layout_finalize (GObject *object)
{
GtkLayout *layout = GTK_LAYOUT (object);
GtkLayoutPriv *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.
*
**/
void
gtk_layout_set_hadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
GtkLayoutPriv *priv;
g_return_if_fail (GTK_IS_LAYOUT (layout));
priv = layout->priv;
gtk_layout_set_adjustments (layout, adjustment, priv->vadjustment);
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.
*
**/
void
gtk_layout_set_vadjustment (GtkLayout *layout,
GtkAdjustment *adjustment)
{
GtkLayoutPriv *priv;
g_return_if_fail (GTK_IS_LAYOUT (layout));
priv = layout->priv;
gtk_layout_set_adjustments (layout, priv->hadjustment, adjustment);
g_object_notify (G_OBJECT (layout), "vadjustment");
}
static GtkLayoutChild*
get_child (GtkLayout *layout,
GtkWidget *widget)
{
GtkLayoutPriv *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)
{
GtkLayoutPriv *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);
}
static void
gtk_layout_set_adjustment_upper (GtkAdjustment *adj,
gdouble upper,
gboolean always_emit_changed)
{
gboolean changed = FALSE;
gboolean value_changed = FALSE;
gdouble min = MAX (0., upper - adj->page_size);
if (upper != adj->upper)
{
adj->upper = upper;
changed = TRUE;
}
if (adj->value > min)
{
adj->value = min;
value_changed = TRUE;
}
if (changed || always_emit_changed)
gtk_adjustment_changed (adj);
if (value_changed)
gtk_adjustment_value_changed (adj);
}
/**
* 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)
{
GtkLayoutPriv *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 (priv->hadjustment)
gtk_layout_set_adjustment_upper (priv->hadjustment, priv->width, FALSE);
if (priv->vadjustment)
gtk_layout_set_adjustment_upper (priv->vadjustment, priv->height, FALSE);
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_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)
{
GtkLayoutPriv *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;
gobject_class->constructor = gtk_layout_constructor;
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));
g_object_class_install_property (gobject_class,
PROP_HADJUSTMENT,
g_param_spec_object ("hadjustment",
P_("Horizontal adjustment"),
P_("The GtkAdjustment for the horizontal position"),
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_VADJUSTMENT,
g_param_spec_object ("vadjustment",
P_("Vertical adjustment"),
P_("The GtkAdjustment for the vertical position"),
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE));
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->expose_event = gtk_layout_expose;
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;
class->set_scroll_adjustments = gtk_layout_set_adjustments;
/**
* GtkLayout::set-scroll-adjustments
* @horizontal: the horizontal #GtkAdjustment
* @vertical: the vertical #GtkAdjustment
*
* Set the scroll adjustments for the layout. Usually scrolled containers
* like #GtkScrolledWindow will emit this signal to connect two instances
* of #GtkScrollbar to the scroll directions of the #GtkLayout.
*/
widget_class->set_scroll_adjustments_signal =
g_signal_new (I_("set-scroll-adjustments"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkLayoutClass, set_scroll_adjustments),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_ADJUSTMENT,
GTK_TYPE_ADJUSTMENT);
g_type_class_add_private (class, sizeof (GtkLayoutPriv));
}
static void
gtk_layout_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLayout *layout = GTK_LAYOUT (object);
GtkLayoutPriv *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_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);
GtkLayoutPriv *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_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)
{
GtkLayoutPriv *priv;
layout->priv = G_TYPE_INSTANCE_GET_PRIVATE (layout,
GTK_TYPE_LAYOUT,
GtkLayoutPriv);
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;
}
static GObject *
gtk_layout_constructor (GType type,
guint n_properties,
GObjectConstructParam *properties)
{
GtkLayoutPriv *priv;
GtkLayout *layout;
GObject *object;
GtkAdjustment *hadj, *vadj;
object = G_OBJECT_CLASS (gtk_layout_parent_class)->constructor (type,
n_properties,
properties);
layout = GTK_LAYOUT (object);
priv = layout->priv;
hadj = priv->hadjustment ? priv->hadjustment : new_default_adjustment ();
vadj = priv->vadjustment ? priv->vadjustment : new_default_adjustment ();
if (!priv->hadjustment || !priv->vadjustment)
gtk_layout_set_adjustments (layout, hadj, vadj);
return object;
}
/* Widget methods
*/
static void
gtk_layout_realize (GtkWidget *widget)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPriv *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.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, window);
gdk_window_set_back_pixmap (window, NULL, FALSE);
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)
{
GtkLayoutPriv *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);
GtkLayoutPriv *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);
GtkLayoutPriv *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)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPriv *priv = layout->priv;
GList *tmp_list;
requisition->width = 0;
requisition->height = 0;
tmp_list = priv->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
GtkRequisition child_requisition;
tmp_list = tmp_list->next;
gtk_widget_size_request (child->widget, &child_requisition);
}
}
static void
gtk_layout_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPriv *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));
}
priv->hadjustment->page_size = allocation->width;
priv->hadjustment->page_increment = allocation->width * 0.9;
priv->hadjustment->lower = 0;
/* set_adjustment_upper() emits ::changed */
gtk_layout_set_adjustment_upper (priv->hadjustment, MAX (allocation->width, priv->width), TRUE);
priv->vadjustment->page_size = allocation->height;
priv->vadjustment->page_increment = allocation->height * 0.9;
priv->vadjustment->lower = 0;
priv->vadjustment->upper = MAX (allocation->height, priv->height);
gtk_layout_set_adjustment_upper (priv->vadjustment, MAX (allocation->height, priv->height), TRUE);
}
static gint
gtk_layout_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkLayout *layout = GTK_LAYOUT (widget);
GtkLayoutPriv *priv = layout->priv;
if (event->window != priv->bin_window)
return FALSE;
GTK_WIDGET_CLASS (gtk_layout_parent_class)->expose_event (widget, event);
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);
GtkLayoutPriv *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);
GtkLayoutPriv *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_child_requisition (child->widget, &requisition);
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)
{
GtkLayoutPriv *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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