forked from AuroraMiddleware/gtk
1009 lines
29 KiB
C
1009 lines
29 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* GtkLayout: Widget for scrolling of arbitrary-sized areas.
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*
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* Copyright Owen Taylor, 1998
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtklayout.h"
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#include "gdk/gdk.h"
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#include "gtkadjustment.h"
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#include "gtkintl.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkscrollable.h"
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/**
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* SECTION:gtklayout
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* @Short_description: Infinite scrollable area containing child widgets
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* and/or custom drawing
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* @Title: GtkLayout
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* @See_also: #GtkDrawingArea, #GtkScrolledWindow
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*
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* #GtkLayout is similar to #GtkDrawingArea in that it’s a “blank slate”
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* and doesn’t do anything but paint a blank background by default. It's
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* different in that it supports scrolling natively (you can add it to a
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* #GtkScrolledWindow), and it can contain child widgets, since it’s a
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* #GtkContainer. However if you’re just going to draw, a #GtkDrawingArea
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* is a better choice since it has lower overhead.
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*
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* When handling expose events on a #GtkLayout, you must draw to
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* GTK_LAYOUT (layout)->bin_window, rather than to
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* GTK_WIDGET (layout)->window, as you would for a drawing
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* area.
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*/
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typedef struct _GtkLayoutChild GtkLayoutChild;
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struct _GtkLayoutPrivate
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{
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/* Properties */
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guint width;
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guint height;
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GtkAdjustment *hadjustment;
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GtkAdjustment *vadjustment;
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/* GtkScrollablePolicy needs to be checked when
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* driving the scrollable adjustment values */
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guint hscroll_policy : 1;
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guint vscroll_policy : 1;
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/* Properties */
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GdkVisibilityState visibility;
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GdkWindow *bin_window;
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GList *children;
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gint scroll_x;
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gint scroll_y;
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guint freeze_count;
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};
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struct _GtkLayoutChild {
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GtkWidget *widget;
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gint x;
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gint y;
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};
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enum {
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PROP_0,
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PROP_HADJUSTMENT,
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PROP_VADJUSTMENT,
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PROP_HSCROLL_POLICY,
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PROP_VSCROLL_POLICY,
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PROP_WIDTH,
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PROP_HEIGHT
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};
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enum {
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CHILD_PROP_0,
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CHILD_PROP_X,
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CHILD_PROP_Y
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};
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static void gtk_layout_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_layout_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_layout_finalize (GObject *object);
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static void gtk_layout_realize (GtkWidget *widget);
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static void gtk_layout_unrealize (GtkWidget *widget);
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static void gtk_layout_map (GtkWidget *widget);
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static void gtk_layout_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline);
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static void gtk_layout_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint gtk_layout_draw (GtkWidget *widget,
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cairo_t *cr);
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static void gtk_layout_add (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_layout_remove (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_layout_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data);
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static void gtk_layout_set_child_property (GtkContainer *container,
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GtkWidget *child,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_layout_get_child_property (GtkContainer *container,
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GtkWidget *child,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_layout_allocate_child (GtkLayout *layout,
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GtkLayoutChild *child);
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static void gtk_layout_adjustment_changed (GtkAdjustment *adjustment,
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GtkLayout *layout);
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static void gtk_layout_set_hadjustment_values (GtkLayout *layout);
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static void gtk_layout_set_vadjustment_values (GtkLayout *layout);
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G_DEFINE_TYPE_WITH_CODE (GtkLayout, gtk_layout, GTK_TYPE_CONTAINER,
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G_ADD_PRIVATE (GtkLayout)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
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/* Public interface
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*/
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/**
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* gtk_layout_new:
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* @hadjustment: (allow-none): horizontal scroll adjustment, or %NULL
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* @vadjustment: (allow-none): vertical scroll adjustment, or %NULL
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*
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* Creates a new #GtkLayout. Unless you have a specific adjustment
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* you’d like the layout to use for scrolling, pass %NULL for
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* @hadjustment and @vadjustment.
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*
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* Returns: a new #GtkLayout
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**/
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GtkWidget*
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gtk_layout_new (GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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GtkLayout *layout;
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layout = g_object_new (GTK_TYPE_LAYOUT,
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"hadjustment", hadjustment,
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"vadjustment", vadjustment,
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NULL);
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return GTK_WIDGET (layout);
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}
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/**
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* gtk_layout_get_bin_window:
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* @layout: a #GtkLayout
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*
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* Retrieve the bin window of the layout used for drawing operations.
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*
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* Returns: (transfer none): a #GdkWindow
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*
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* Since: 2.14
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**/
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GdkWindow*
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gtk_layout_get_bin_window (GtkLayout *layout)
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{
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g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
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return layout->priv->bin_window;
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}
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static void
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gtk_layout_set_hadjustment_values (GtkLayout *layout)
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{
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GtkLayoutPrivate *priv = layout->priv;
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GtkAllocation allocation;
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GtkAdjustment *adj = priv->hadjustment;
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gdouble old_value;
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gdouble new_value;
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gdouble new_upper;
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gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
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old_value = gtk_adjustment_get_value (adj);
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new_upper = MAX (allocation.width, priv->width);
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g_object_set (adj,
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"lower", 0.0,
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"upper", new_upper,
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"page-size", (gdouble)allocation.width,
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"step-increment", allocation.width * 0.1,
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"page-increment", allocation.width * 0.9,
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NULL);
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new_value = CLAMP (old_value, 0, new_upper - allocation.width);
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if (new_value != old_value)
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gtk_adjustment_set_value (adj, new_value);
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}
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static void
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gtk_layout_set_vadjustment_values (GtkLayout *layout)
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{
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GtkAllocation allocation;
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GtkAdjustment *adj = layout->priv->vadjustment;
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gdouble old_value;
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gdouble new_value;
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gdouble new_upper;
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gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
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old_value = gtk_adjustment_get_value (adj);
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new_upper = MAX (allocation.height, layout->priv->height);
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g_object_set (adj,
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"lower", 0.0,
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"upper", new_upper,
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"page-size", (gdouble)allocation.height,
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"step-increment", allocation.height * 0.1,
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"page-increment", allocation.height * 0.9,
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NULL);
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new_value = CLAMP (old_value, 0, new_upper - allocation.height);
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if (new_value != old_value)
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gtk_adjustment_set_value (adj, new_value);
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}
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static void
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gtk_layout_finalize (GObject *object)
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{
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GtkLayout *layout = GTK_LAYOUT (object);
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GtkLayoutPrivate *priv = layout->priv;
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g_object_unref (priv->hadjustment);
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g_object_unref (priv->vadjustment);
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G_OBJECT_CLASS (gtk_layout_parent_class)->finalize (object);
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}
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static void
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gtk_layout_set_hadjustment (GtkLayout *layout,
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GtkAdjustment *adjustment)
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{
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GtkLayoutPrivate *priv;
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priv = layout->priv;
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if (adjustment && priv->hadjustment == adjustment)
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return;
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if (priv->hadjustment != NULL)
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{
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g_signal_handlers_disconnect_by_func (priv->hadjustment,
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gtk_layout_adjustment_changed,
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layout);
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g_object_unref (priv->hadjustment);
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}
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if (adjustment == NULL)
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adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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g_signal_connect (adjustment, "value-changed",
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G_CALLBACK (gtk_layout_adjustment_changed), layout);
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priv->hadjustment = g_object_ref_sink (adjustment);
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gtk_layout_set_hadjustment_values (layout);
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g_object_notify (G_OBJECT (layout), "hadjustment");
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}
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static void
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gtk_layout_set_vadjustment (GtkLayout *layout,
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GtkAdjustment *adjustment)
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{
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GtkLayoutPrivate *priv;
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priv = layout->priv;
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if (adjustment && priv->vadjustment == adjustment)
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return;
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if (priv->vadjustment != NULL)
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{
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g_signal_handlers_disconnect_by_func (priv->vadjustment,
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gtk_layout_adjustment_changed,
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layout);
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g_object_unref (priv->vadjustment);
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}
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if (adjustment == NULL)
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adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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g_signal_connect (adjustment, "value-changed",
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G_CALLBACK (gtk_layout_adjustment_changed), layout);
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priv->vadjustment = g_object_ref_sink (adjustment);
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gtk_layout_set_vadjustment_values (layout);
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g_object_notify (G_OBJECT (layout), "vadjustment");
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}
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static GtkLayoutChild*
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get_child (GtkLayout *layout,
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GtkWidget *widget)
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{
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GtkLayoutPrivate *priv = layout->priv;
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GList *children;
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children = priv->children;
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while (children)
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{
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GtkLayoutChild *child;
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child = children->data;
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children = children->next;
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if (child->widget == widget)
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return child;
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}
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return NULL;
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}
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/**
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* gtk_layout_put:
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* @layout: a #GtkLayout
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* @child_widget: child widget
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* @x: X position of child widget
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* @y: Y position of child widget
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*
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* Adds @child_widget to @layout, at position (@x,@y).
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* @layout becomes the new parent container of @child_widget.
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*
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**/
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void
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gtk_layout_put (GtkLayout *layout,
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GtkWidget *child_widget,
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gint x,
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gint y)
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{
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GtkLayoutPrivate *priv;
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GtkLayoutChild *child;
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g_return_if_fail (GTK_IS_LAYOUT (layout));
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g_return_if_fail (GTK_IS_WIDGET (child_widget));
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priv = layout->priv;
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child = g_new (GtkLayoutChild, 1);
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child->widget = child_widget;
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child->x = x;
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child->y = y;
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priv->children = g_list_append (priv->children, child);
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if (gtk_widget_get_realized (GTK_WIDGET (layout)))
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gtk_widget_set_parent_window (child->widget, priv->bin_window);
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gtk_widget_set_parent (child_widget, GTK_WIDGET (layout));
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}
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static void
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gtk_layout_move_internal (GtkLayout *layout,
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GtkWidget *widget,
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gboolean change_x,
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gint x,
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gboolean change_y,
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gint y)
|
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{
|
||
GtkLayoutChild *child;
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||
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child = get_child (layout, widget);
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||
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g_assert (child);
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||
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gtk_widget_freeze_child_notify (widget);
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if (change_x)
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{
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child->x = x;
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gtk_widget_child_notify (widget, "x");
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}
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|
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if (change_y)
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{
|
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child->y = y;
|
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gtk_widget_child_notify (widget, "y");
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}
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||
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gtk_widget_thaw_child_notify (widget);
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|
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if (gtk_widget_get_visible (widget) &&
|
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gtk_widget_get_visible (GTK_WIDGET (layout)))
|
||
gtk_widget_queue_resize (widget);
|
||
}
|
||
|
||
/**
|
||
* gtk_layout_move:
|
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* @layout: a #GtkLayout
|
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* @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,
|
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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->measure = gtk_layout_measure;
|
||
widget_class->size_allocate = gtk_layout_size_allocate;
|
||
widget_class->draw = gtk_layout_draw;
|
||
|
||
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_set_hadjustment (layout, g_value_get_object (value));
|
||
break;
|
||
case PROP_VADJUSTMENT:
|
||
gtk_layout_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;
|
||
GList *tmp_list;
|
||
|
||
gtk_widget_set_realized (widget, TRUE);
|
||
|
||
gtk_widget_get_allocation (widget, &allocation);
|
||
|
||
window = gdk_window_new_child (gtk_widget_get_parent_window (widget),
|
||
GDK_VISIBILITY_NOTIFY_MASK,
|
||
&allocation);
|
||
gtk_widget_set_window (widget, window);
|
||
gtk_widget_register_window (widget, window);
|
||
|
||
priv->bin_window = gdk_window_new_child (window,
|
||
gtk_widget_get_events (widget)
|
||
| GDK_EXPOSURE_MASK
|
||
| GDK_SCROLL_MASK
|
||
| GDK_SMOOTH_SCROLL_MASK,
|
||
&(GdkRectangle) {
|
||
- gtk_adjustment_get_value (priv->hadjustment),
|
||
- gtk_adjustment_get_value (priv->vadjustment),
|
||
MAX (priv->width, allocation.width),
|
||
MAX (priv->height, allocation.height)});
|
||
gtk_widget_register_window (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_map (GtkWidget *widget)
|
||
{
|
||
GtkLayout *layout = GTK_LAYOUT (widget);
|
||
GtkLayoutPrivate *priv = layout->priv;
|
||
GList *tmp_list;
|
||
|
||
GTK_WIDGET_CLASS (gtk_layout_parent_class)->map (widget);
|
||
|
||
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_measure (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
int for_size,
|
||
int *minimum,
|
||
int *natural,
|
||
int *minimum_baseline,
|
||
int *natural_baseline)
|
||
{
|
||
*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));
|
||
}
|
||
}
|