1131 lines
32 KiB
C
1131 lines
32 KiB
C
/* 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
|
||
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);
|
||
gtk_style_context_set_background (gtk_widget_get_style_context (widget), priv->bin_window);
|
||
|
||
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)
|
||
{
|
||
GtkLayoutPrivate *priv;
|
||
|
||
GTK_WIDGET_CLASS (gtk_layout_parent_class)->style_updated (widget);
|
||
|
||
if (gtk_widget_get_realized (widget))
|
||
{
|
||
priv = GTK_LAYOUT (widget)->priv;
|
||
gtk_style_context_set_background (gtk_widget_get_style_context (widget), priv->bin_window);
|
||
}
|
||
}
|
||
|
||
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));
|
||
}
|
||
}
|