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gtk3/gtk/gtklayout.c
Owen Taylor b2b29ea184 gtk/gtkclist.c (adjust_adjustments) gtk/gtklayout.c 
Mon Feb 18 14:17:59 2002  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkclist.c (adjust_adjustments)
        * gtk/gtklayout.c (gtk_layout_size_allocate)
        * gtk/gtktextview.c (gtk_text_view_size_allocate)
        * gtk/gtktreeview.c (gtk_tree_view_size_allocate)
        * gtk/gtkviewport.c (gtk_viewport_size_allocate):
        Standardize on a page increment of page minus 1 line
        rather than half a page (#51027, Eric Fischer)

        * gtk/gtkviewport.c (gtk_viewport_size_allocate):
        Change step increment to be 0.1 * page_size height rather than
        a fixed 10 pixels.
2002-02-18 19:20:31 +00:00

1131 lines
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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 "gdkconfig.h"
#include "gtklayout.h"
#include "gtksignal.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
typedef struct _GtkLayoutChild GtkLayoutChild;
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_class_init (GtkLayoutClass *class);
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_init (GtkLayout *layout);
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_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);
static GtkWidgetClass *parent_class = NULL;
/* Public interface
*/
/**
* gtk_layout_new:
* @hadjustment: horizontal scroll adjustment, or %NULL
* @vadjustment: 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_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->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->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)
{
gboolean need_adjust = FALSE;
g_return_if_fail (GTK_IS_LAYOUT (layout));
if (hadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
else if (layout->hadjustment)
hadj = new_default_adjustment ();
if (vadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
else if (layout->vadjustment)
vadj = new_default_adjustment ();
if (layout->hadjustment && (layout->hadjustment != hadj))
{
gtk_signal_disconnect_by_data (GTK_OBJECT (layout->hadjustment), layout);
gtk_object_unref (GTK_OBJECT (layout->hadjustment));
}
if (layout->vadjustment && (layout->vadjustment != vadj))
{
gtk_signal_disconnect_by_data (GTK_OBJECT (layout->vadjustment), layout);
gtk_object_unref (GTK_OBJECT (layout->vadjustment));
}
if (layout->hadjustment != hadj)
{
layout->hadjustment = hadj;
gtk_object_ref (GTK_OBJECT (layout->hadjustment));
gtk_object_sink (GTK_OBJECT (layout->hadjustment));
gtk_layout_set_adjustment_upper (layout->hadjustment, layout->width);
gtk_signal_connect (GTK_OBJECT (layout->hadjustment), "value_changed",
(GtkSignalFunc) gtk_layout_adjustment_changed,
layout);
need_adjust = TRUE;
}
if (layout->vadjustment != vadj)
{
layout->vadjustment = vadj;
gtk_object_ref (GTK_OBJECT (layout->vadjustment));
gtk_object_sink (GTK_OBJECT (layout->vadjustment));
gtk_layout_set_adjustment_upper (layout->vadjustment, layout->height);
gtk_signal_connect (GTK_OBJECT (layout->vadjustment), "value_changed",
(GtkSignalFunc) 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);
gtk_object_unref (GTK_OBJECT (layout->hadjustment));
gtk_object_unref (GTK_OBJECT (layout->vadjustment));
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gtk_layout_set_hadjustment:
* @layout: a #GtkLayout
* @adjustment: 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)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
gtk_layout_set_adjustments (layout, adjustment, layout->vadjustment);
g_object_notify (G_OBJECT (layout), "hadjustment");
}
/**
* gtk_layout_set_vadjustment:
* @layout: a #GtkLayout
* @adjustment: 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)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
gtk_layout_set_adjustments (layout, layout->hadjustment, adjustment);
g_object_notify (G_OBJECT (layout), "vadjustment");
}
static GtkLayoutChild*
get_child (GtkLayout *layout,
GtkWidget *widget)
{
GList *children;
children = layout->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)
{
GtkLayoutChild *child;
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (GTK_IS_WIDGET (child_widget));
child = g_new (GtkLayoutChild, 1);
child->widget = child_widget;
child->x = x;
child->y = y;
layout->children = g_list_append (layout->children, child);
if (GTK_WIDGET_REALIZED (layout))
gtk_widget_set_parent_window (child->widget, layout->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;
g_return_if_fail (GTK_IS_LAYOUT (layout));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == GTK_WIDGET (layout));
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_VISIBLE (widget) && GTK_WIDGET_VISIBLE (layout))
gtk_widget_queue_resize (GTK_WIDGET (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 (child_widget->parent == 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)
{
if (upper != adj->upper)
{
gdouble min = MAX (0., upper - adj->page_size);
gboolean value_changed = FALSE;
adj->upper = upper;
if (adj->value > min)
{
adj->value = min;
value_changed = TRUE;
}
gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
if (value_changed)
gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
}
}
/**
* 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)
{
GtkWidget *widget;
g_return_if_fail (GTK_IS_LAYOUT (layout));
widget = GTK_WIDGET (layout);
g_object_freeze_notify (G_OBJECT (layout));
if (width != layout->width)
{
layout->width = width;
g_object_notify (G_OBJECT (layout), "width");
}
if (height != layout->height)
{
layout->height = height;
g_object_notify (G_OBJECT (layout), "height");
}
g_object_thaw_notify (G_OBJECT (layout));
if (layout->hadjustment)
gtk_layout_set_adjustment_upper (layout->hadjustment, layout->width);
if (layout->vadjustment)
gtk_layout_set_adjustment_upper (layout->vadjustment, layout->height);
if (GTK_WIDGET_REALIZED (layout))
{
width = MAX (width, widget->allocation.width);
height = MAX (height, widget->allocation.height);
gdk_window_resize (layout->bin_window, width, height);
}
}
/**
* gtk_layout_get_size:
* @layout: a #GtkLayout
* @width: location to store the width set on @layout, or %NULL
* @height: 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)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
if (width)
*width = layout->width;
if (height)
*height = layout->height;
}
/**
* gtk_layout_freeze:
* @layout: a #GtkLayout
*
* This is a deprecated function, it doesn't do anything useful.
**/
void
gtk_layout_freeze (GtkLayout *layout)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
layout->freeze_count++;
}
/**
* gtk_layout_thaw:
* @layout: a #GtkLayout
*
* This is a deprecated function, it doesn't do anything useful.
**/
void
gtk_layout_thaw (GtkLayout *layout)
{
g_return_if_fail (GTK_IS_LAYOUT (layout));
if (layout->freeze_count)
if (!(--layout->freeze_count))
gtk_widget_draw (GTK_WIDGET (layout), NULL);
}
/* Basic Object handling procedures
*/
GtkType
gtk_layout_get_type (void)
{
static GtkType layout_type = 0;
if (!layout_type)
{
static const GTypeInfo layout_info =
{
sizeof (GtkLayoutClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_layout_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkLayout),
16, /* n_preallocs */
(GInstanceInitFunc) gtk_layout_init,
};
layout_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkLayout", &layout_info, 0);
}
return layout_type;
}
static void
gtk_layout_class_init (GtkLayoutClass *class)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass*) class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
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",
_("X position"),
_("X position of child widget"),
G_MININT,
G_MAXINT,
0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_Y,
g_param_spec_int ("y",
_("Y position"),
_("Y position of child widget"),
G_MININT,
G_MAXINT,
0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HADJUSTMENT,
g_param_spec_object ("hadjustment",
_("Horizontal adjustment"),
_("The GtkAdjustment for the horizontal position."),
GTK_TYPE_ADJUSTMENT,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_VADJUSTMENT,
g_param_spec_object ("vadjustment",
_("Vertical adjustment"),
_("The GtkAdjustment for the vertical position."),
GTK_TYPE_ADJUSTMENT,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_WIDTH,
g_param_spec_uint ("width",
_("Width"),
_("The width of the layout."),
0,
G_MAXINT,
100,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HEIGHT,
g_param_spec_uint ("height",
_("Height"),
_("The height of the layout."),
0,
G_MAXINT,
100,
G_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->remove = gtk_layout_remove;
container_class->forall = gtk_layout_forall;
class->set_scroll_adjustments = gtk_layout_set_adjustments;
widget_class->set_scroll_adjustments_signal =
gtk_signal_new ("set_scroll_adjustments",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkLayoutClass, set_scroll_adjustments),
_gtk_marshal_VOID__OBJECT_OBJECT,
GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
}
static void
gtk_layout_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLayout *layout = GTK_LAYOUT (object);
switch (prop_id)
{
case PROP_HADJUSTMENT:
g_value_set_object (value, layout->hadjustment);
break;
case PROP_VADJUSTMENT:
g_value_set_object (value, layout->vadjustment);
break;
case PROP_WIDTH:
g_value_set_uint (value, layout->width);
break;
case PROP_HEIGHT:
g_value_set_uint (value, layout->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);
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),
layout->height);
break;
case PROP_HEIGHT:
gtk_layout_set_size (layout, layout->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)
{
layout->children = NULL;
layout->width = 100;
layout->height = 100;
layout->hadjustment = NULL;
layout->vadjustment = NULL;
layout->bin_window = NULL;
layout->scroll_x = 0;
layout->scroll_y = 0;
layout->visibility = GDK_VISIBILITY_PARTIAL;
layout->freeze_count = 0;
}
static GObject *
gtk_layout_constructor (GType type,
guint n_properties,
GObjectConstructParam *properties)
{
GtkLayout *layout;
GObject *object;
GtkAdjustment *hadj, *vadj;
object = G_OBJECT_CLASS (parent_class)->constructor (type,
n_properties,
properties);
layout = GTK_LAYOUT (object);
hadj = layout->hadjustment ? layout->hadjustment : new_default_adjustment ();
vadj = layout->vadjustment ? layout->vadjustment : new_default_adjustment ();
if (!layout->hadjustment || !layout->vadjustment)
gtk_layout_set_adjustments (layout, hadj, vadj);
return object;
}
/* Widget methods
*/
static void
gtk_layout_realize (GtkWidget *widget)
{
GList *tmp_list;
GtkLayout *layout;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (GTK_IS_LAYOUT (widget));
layout = GTK_LAYOUT (widget);
GTK_WIDGET_SET_FLAGS (layout, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->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;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (widget->window, widget);
attributes.x = - layout->hadjustment->value,
attributes.y = - layout->vadjustment->value;
attributes.width = MAX (layout->width, widget->allocation.width);
attributes.height = MAX (layout->height, widget->allocation.height);
attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK |
gtk_widget_get_events (widget);
layout->bin_window = gdk_window_new (widget->window,
&attributes, attributes_mask);
gdk_window_set_user_data (layout->bin_window, widget);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, layout->bin_window, GTK_STATE_NORMAL);
tmp_list = layout->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
gtk_widget_set_parent_window (child->widget, layout->bin_window);
}
}
static void
gtk_layout_style_set (GtkWidget *widget, GtkStyle *old_style)
{
if (GTK_WIDGET_CLASS (parent_class)->style_set)
(* GTK_WIDGET_CLASS (parent_class)->style_set) (widget, old_style);
if (GTK_WIDGET_REALIZED (widget))
{
gtk_style_set_background (widget->style, GTK_LAYOUT (widget)->bin_window, GTK_STATE_NORMAL);
}
}
static void
gtk_layout_map (GtkWidget *widget)
{
GList *tmp_list;
GtkLayout *layout;
g_return_if_fail (GTK_IS_LAYOUT (widget));
layout = GTK_LAYOUT (widget);
GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
tmp_list = layout->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
if (GTK_WIDGET_VISIBLE (child->widget))
{
if (!GTK_WIDGET_MAPPED (child->widget))
gtk_widget_map (child->widget);
}
}
gdk_window_show (layout->bin_window);
gdk_window_show (widget->window);
}
static void
gtk_layout_unrealize (GtkWidget *widget)
{
GtkLayout *layout;
g_return_if_fail (GTK_IS_LAYOUT (widget));
layout = GTK_LAYOUT (widget);
gdk_window_set_user_data (layout->bin_window, NULL);
gdk_window_destroy (layout->bin_window);
layout->bin_window = NULL;
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_layout_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GList *tmp_list;
GtkLayout *layout;
g_return_if_fail (GTK_IS_LAYOUT (widget));
layout = GTK_LAYOUT (widget);
requisition->width = 0;
requisition->height = 0;
tmp_list = layout->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)
{
GList *tmp_list;
GtkLayout *layout;
g_return_if_fail (GTK_IS_LAYOUT (widget));
widget->allocation = *allocation;
layout = GTK_LAYOUT (widget);
tmp_list = layout->children;
while (tmp_list)
{
GtkLayoutChild *child = tmp_list->data;
tmp_list = tmp_list->next;
gtk_layout_allocate_child (layout, child);
}
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_window_resize (layout->bin_window,
MAX (layout->width, allocation->width),
MAX (layout->height, allocation->height));
}
layout->hadjustment->page_size = allocation->width;
layout->hadjustment->page_increment = allocation->width * 0.9;
layout->hadjustment->lower = 0;
layout->hadjustment->upper = MAX (allocation->width, layout->width);
gtk_signal_emit_by_name (GTK_OBJECT (layout->hadjustment), "changed");
layout->vadjustment->page_size = allocation->height;
layout->vadjustment->page_increment = allocation->height * 0.9;
layout->vadjustment->lower = 0;
layout->vadjustment->upper = MAX (allocation->height, layout->height);
gtk_signal_emit_by_name (GTK_OBJECT (layout->vadjustment), "changed");
}
static gint
gtk_layout_expose (GtkWidget *widget, GdkEventExpose *event)
{
GtkLayout *layout;
g_return_val_if_fail (GTK_IS_LAYOUT (widget), FALSE);
layout = GTK_LAYOUT (widget);
if (event->window != layout->bin_window)
return FALSE;
(* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
return FALSE;
}
/* Container method
*/
static void
gtk_layout_remove (GtkContainer *container,
GtkWidget *widget)
{
GList *tmp_list;
GtkLayout *layout;
GtkLayoutChild *child = NULL;
g_return_if_fail (GTK_IS_LAYOUT (container));
layout = GTK_LAYOUT (container);
tmp_list = layout->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);
layout->children = g_list_remove_link (layout->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;
GtkLayoutChild *child;
GList *tmp_list;
g_return_if_fail (GTK_IS_LAYOUT (container));
g_return_if_fail (callback != NULL);
layout = GTK_LAYOUT (container);
tmp_list = layout->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)
{
GtkWidget *widget;
widget = GTK_WIDGET (layout);
if (layout->freeze_count)
return;
if (GTK_WIDGET_REALIZED (layout))
{
gdk_window_move (layout->bin_window,
- layout->hadjustment->value,
- layout->vadjustment->value);
gdk_window_process_updates (layout->bin_window, TRUE);
}
}
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