forked from AuroraMiddleware/gtk
aa49527fa7
Sat Jul 7 02:50:14 2001 Owen Taylor <otaylor@redhat.com> * gtk/gtkwidget.c (gtk_widget_set_parent): Enforce the widget/child realization/mapping invariants. * gtk/gtkwidget.[ch] gtk/gtkprivate.h: Add functions gtk_widget_[get/set]_child_visible() to control whether visible children of a mapped window are mapped. * docs/widget_system.txt: Updated for changes in container contract, and addition of GTK_CHILD_VISIBLE. * gtk/gtkcontainer.c: Add generic map()/unmap() functions that work for almost all containers. * gtk/gtknotebook.c gtk/gtkpacker.c: Use gtk_widget_set_child_visible() where necessary. * gtk/*.c: Remove excess map(), unmap(), and realization/mapping invariant enforcing code from many containers.
800 lines
24 KiB
C
800 lines
24 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "gtksignal.h"
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#include "gtkviewport.h"
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#include "gtkintl.h"
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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_SHADOW_TYPE
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};
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static void gtk_viewport_class_init (GtkViewportClass *klass);
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static void gtk_viewport_init (GtkViewport *viewport);
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static void gtk_viewport_destroy (GtkObject *object);
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static void gtk_viewport_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_viewport_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_viewport_set_scroll_adjustments (GtkViewport *viewport,
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GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment);
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static void gtk_viewport_realize (GtkWidget *widget);
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static void gtk_viewport_unrealize (GtkWidget *widget);
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static void gtk_viewport_paint (GtkWidget *widget,
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GdkRectangle *area);
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static gint gtk_viewport_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_viewport_add (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_viewport_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_viewport_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_viewport_adjustment_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void gtk_viewport_style_set (GtkWidget *widget,
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GtkStyle *previous_style);
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static GtkBinClass *parent_class;
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GtkType
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gtk_viewport_get_type (void)
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{
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static GtkType viewport_type = 0;
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if (!viewport_type)
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{
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static const GtkTypeInfo viewport_info =
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{
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"GtkViewport",
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sizeof (GtkViewport),
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sizeof (GtkViewportClass),
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(GtkClassInitFunc) gtk_viewport_class_init,
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(GtkObjectInitFunc) gtk_viewport_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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viewport_type = gtk_type_unique (GTK_TYPE_BIN, &viewport_info);
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}
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return viewport_type;
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}
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static void
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gtk_viewport_class_init (GtkViewportClass *class)
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{
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GtkObjectClass *object_class;
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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GtkContainerClass *container_class;
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object_class = (GtkObjectClass*) class;
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gobject_class = G_OBJECT_CLASS (class);
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widget_class = (GtkWidgetClass*) class;
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container_class = (GtkContainerClass*) class;
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parent_class = (GtkBinClass*) gtk_type_class (GTK_TYPE_BIN);
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gobject_class->set_property = gtk_viewport_set_property;
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gobject_class->get_property = gtk_viewport_get_property;
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object_class->destroy = gtk_viewport_destroy;
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widget_class->realize = gtk_viewport_realize;
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widget_class->unrealize = gtk_viewport_unrealize;
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widget_class->expose_event = gtk_viewport_expose;
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widget_class->size_request = gtk_viewport_size_request;
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widget_class->size_allocate = gtk_viewport_size_allocate;
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widget_class->style_set = gtk_viewport_style_set;
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container_class->add = gtk_viewport_add;
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class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments;
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g_object_class_install_property (gobject_class,
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PROP_HADJUSTMENT,
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g_param_spec_object ("hadjustment",
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_("Horizontal adjustment"),
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_("The GtkAdjustment that determines the values of the horizontal position for this viewport."),
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GTK_TYPE_ADJUSTMENT,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_VADJUSTMENT,
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g_param_spec_object ("vadjustment",
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_("Vertical adjustment"),
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_("The GtkAdjustment that determines the values of the vertical position for this viewport."),
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GTK_TYPE_ADJUSTMENT,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_SHADOW_TYPE,
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g_param_spec_enum ("shadow_type",
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_("Shadow type"),
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_("Determines how the shadowed box around the viewport is drawn."),
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GTK_TYPE_SHADOW_TYPE,
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GTK_SHADOW_IN,
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G_PARAM_READWRITE));
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widget_class->set_scroll_adjustments_signal =
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gtk_signal_new ("set_scroll_adjustments",
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GTK_RUN_LAST,
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GTK_CLASS_TYPE (object_class),
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GTK_SIGNAL_OFFSET (GtkViewportClass, set_scroll_adjustments),
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gtk_marshal_VOID__OBJECT_OBJECT,
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GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
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}
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static void
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gtk_viewport_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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{
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GtkViewport *viewport;
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viewport = GTK_VIEWPORT (object);
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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gtk_viewport_set_hadjustment (viewport, g_value_get_object (value));
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break;
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case PROP_VADJUSTMENT:
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gtk_viewport_set_vadjustment (viewport, g_value_get_object (value));
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break;
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case PROP_SHADOW_TYPE:
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gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_viewport_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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{
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GtkViewport *viewport;
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viewport = GTK_VIEWPORT (object);
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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g_value_set_object (value, G_OBJECT (viewport->hadjustment));
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break;
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case PROP_VADJUSTMENT:
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g_value_set_object (value, G_OBJECT (viewport->vadjustment));
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break;
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case PROP_SHADOW_TYPE:
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g_value_set_enum (value, viewport->shadow_type);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_viewport_init (GtkViewport *viewport)
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{
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GTK_WIDGET_UNSET_FLAGS (viewport, GTK_NO_WINDOW);
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gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE);
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viewport->shadow_type = GTK_SHADOW_IN;
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viewport->view_window = NULL;
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viewport->bin_window = NULL;
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viewport->hadjustment = NULL;
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viewport->vadjustment = NULL;
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}
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GtkWidget*
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gtk_viewport_new (GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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GtkWidget *viewport;
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viewport = gtk_widget_new (GTK_TYPE_VIEWPORT,
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"hadjustment", hadjustment,
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"vadjustment", vadjustment,
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NULL);
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return viewport;
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}
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static void
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gtk_viewport_destroy (GtkObject *object)
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{
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GtkViewport *viewport = GTK_VIEWPORT (object);
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if (viewport->hadjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->hadjustment), viewport);
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gtk_object_unref (GTK_OBJECT (viewport->hadjustment));
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viewport->hadjustment = NULL;
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}
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if (viewport->vadjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->vadjustment), viewport);
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gtk_object_unref (GTK_OBJECT (viewport->vadjustment));
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viewport->vadjustment = NULL;
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}
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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GtkAdjustment*
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gtk_viewport_get_hadjustment (GtkViewport *viewport)
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{
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g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
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if (!viewport->hadjustment)
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gtk_viewport_set_hadjustment (viewport, NULL);
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return viewport->hadjustment;
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}
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GtkAdjustment*
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gtk_viewport_get_vadjustment (GtkViewport *viewport)
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{
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g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
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if (!viewport->vadjustment)
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gtk_viewport_set_vadjustment (viewport, NULL);
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return viewport->vadjustment;
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}
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void
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gtk_viewport_set_hadjustment (GtkViewport *viewport,
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GtkAdjustment *adjustment)
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{
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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if (adjustment)
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (viewport->hadjustment && viewport->hadjustment != adjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->hadjustment), viewport);
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gtk_object_unref (GTK_OBJECT (viewport->hadjustment));
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viewport->hadjustment = NULL;
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}
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if (!adjustment)
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adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
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0.0, 0.0, 0.0));
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if (viewport->hadjustment != adjustment)
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{
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viewport->hadjustment = adjustment;
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gtk_object_ref (GTK_OBJECT (viewport->hadjustment));
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gtk_object_sink (GTK_OBJECT (viewport->hadjustment));
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gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
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(GtkSignalFunc) gtk_viewport_adjustment_changed,
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(gpointer) viewport);
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gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
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(GtkSignalFunc) gtk_viewport_adjustment_value_changed,
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(gpointer) viewport);
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gtk_viewport_adjustment_changed (adjustment, viewport);
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}
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g_object_notify (G_OBJECT (viewport), "hadjustment");
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}
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void
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gtk_viewport_set_vadjustment (GtkViewport *viewport,
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GtkAdjustment *adjustment)
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{
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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if (adjustment)
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (viewport->vadjustment && viewport->vadjustment != adjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->vadjustment), viewport);
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gtk_object_unref (GTK_OBJECT (viewport->vadjustment));
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viewport->vadjustment = NULL;
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}
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if (!adjustment)
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adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
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0.0, 0.0, 0.0));
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if (viewport->vadjustment != adjustment)
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{
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viewport->vadjustment = adjustment;
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gtk_object_ref (GTK_OBJECT (viewport->vadjustment));
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gtk_object_sink (GTK_OBJECT (viewport->vadjustment));
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gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
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(GtkSignalFunc) gtk_viewport_adjustment_changed,
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(gpointer) viewport);
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gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
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(GtkSignalFunc) gtk_viewport_adjustment_value_changed,
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(gpointer) viewport);
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gtk_viewport_adjustment_changed (adjustment, viewport);
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}
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g_object_notify (G_OBJECT (viewport), "vadjustment");
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}
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static void
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gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
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GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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if (viewport->hadjustment != hadjustment)
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gtk_viewport_set_hadjustment (viewport, hadjustment);
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if (viewport->vadjustment != vadjustment)
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gtk_viewport_set_vadjustment (viewport, vadjustment);
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}
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void
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gtk_viewport_set_shadow_type (GtkViewport *viewport,
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GtkShadowType type)
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{
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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if ((GtkShadowType) viewport->shadow_type != type)
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{
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viewport->shadow_type = type;
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if (GTK_WIDGET_VISIBLE (viewport))
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{
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gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
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gtk_widget_queue_draw (GTK_WIDGET (viewport));
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}
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}
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g_object_notify (G_OBJECT (viewport), "shadow_type");
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}
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/**
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* gtk_viewport_get_shadow_type:
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* @viewport: a #GtkViewport
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*
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* Gets the shadow type of the #GtkViewport. See
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* gtk_viewport_set_shadow_type().
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* Return value: the shadow type
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**/
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GtkShadowType
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gtk_viewport_get_shadow_type (GtkViewport *viewport)
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{
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g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
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return viewport->shadow_type;
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}
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static void
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gtk_viewport_realize (GtkWidget *widget)
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{
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GtkBin *bin;
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GtkViewport *viewport;
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GdkWindowAttr attributes;
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gint attributes_mask;
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gint event_mask;
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gint border_width;
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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border_width = GTK_CONTAINER (widget)->border_width;
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bin = GTK_BIN (widget);
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viewport = GTK_VIEWPORT (widget);
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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attributes.x = widget->allocation.x + border_width;
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attributes.y = widget->allocation.y + border_width;
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attributes.width = widget->allocation.width - border_width * 2;
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attributes.height = widget->allocation.height - border_width * 2;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.colormap = gtk_widget_get_colormap (widget);
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event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
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/* We select on button_press_mask so that button 4-5 scrolls are trapped.
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*/
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attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK;
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
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widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
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&attributes, attributes_mask);
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gdk_window_set_user_data (widget->window, viewport);
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if (viewport->shadow_type != GTK_SHADOW_NONE)
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{
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attributes.x = widget->style->xthickness;
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attributes.y = widget->style->ythickness;
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}
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else
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{
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attributes.x = 0;
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attributes.y = 0;
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}
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attributes.width = MAX (1, (gint)widget->allocation.width - attributes.x * 2 - border_width * 2);
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attributes.height = MAX (1, (gint)widget->allocation.height - attributes.y * 2 - border_width * 2);
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attributes.event_mask = 0;
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viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
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gdk_window_set_user_data (viewport->view_window, viewport);
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attributes.x = 0;
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attributes.y = 0;
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if (bin->child)
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{
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attributes.width = viewport->hadjustment->upper;
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attributes.height = viewport->vadjustment->upper;
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}
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attributes.event_mask = event_mask;
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viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
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gdk_window_set_user_data (viewport->bin_window, viewport);
|
|
|
|
if (bin->child)
|
|
gtk_widget_set_parent_window (bin->child, viewport->bin_window);
|
|
|
|
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, viewport->bin_window, GTK_STATE_NORMAL);
|
|
|
|
gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL,
|
|
GTK_SHADOW_NONE,
|
|
NULL, widget, "viewportbin",
|
|
0, 0, -1, -1);
|
|
|
|
gdk_window_show (viewport->bin_window);
|
|
gdk_window_show (viewport->view_window);
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_unrealize (GtkWidget *widget)
|
|
{
|
|
GtkViewport *viewport;
|
|
|
|
g_return_if_fail (GTK_IS_VIEWPORT (widget));
|
|
|
|
viewport = GTK_VIEWPORT (widget);
|
|
|
|
gdk_window_set_user_data (viewport->view_window, NULL);
|
|
gdk_window_destroy (viewport->view_window);
|
|
viewport->view_window = NULL;
|
|
|
|
gdk_window_set_user_data (viewport->bin_window, NULL);
|
|
gdk_window_destroy (viewport->bin_window);
|
|
viewport->bin_window = NULL;
|
|
|
|
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
|
|
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_paint (GtkWidget *widget,
|
|
GdkRectangle *area)
|
|
{
|
|
GtkViewport *viewport;
|
|
|
|
g_return_if_fail (GTK_IS_VIEWPORT (widget));
|
|
g_return_if_fail (area != NULL);
|
|
|
|
if (GTK_WIDGET_DRAWABLE (widget))
|
|
{
|
|
viewport = GTK_VIEWPORT (widget);
|
|
|
|
gtk_draw_shadow (widget->style, widget->window,
|
|
GTK_STATE_NORMAL, viewport->shadow_type,
|
|
0, 0, -1, -1);
|
|
}
|
|
}
|
|
|
|
static gint
|
|
gtk_viewport_expose (GtkWidget *widget,
|
|
GdkEventExpose *event)
|
|
{
|
|
GtkViewport *viewport;
|
|
GtkBin *bin;
|
|
GdkEventExpose child_event;
|
|
|
|
g_return_val_if_fail (GTK_IS_VIEWPORT (widget), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
if (GTK_WIDGET_DRAWABLE (widget))
|
|
{
|
|
viewport = GTK_VIEWPORT (widget);
|
|
bin = GTK_BIN (widget);
|
|
|
|
if (event->window == widget->window)
|
|
gtk_viewport_paint (widget, &event->area);
|
|
else if (event->window == viewport->bin_window)
|
|
{
|
|
child_event = *event;
|
|
|
|
gtk_paint_flat_box(widget->style, viewport->bin_window,
|
|
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
|
|
&event->area, widget, "viewportbin",
|
|
0, 0, -1, -1);
|
|
|
|
(* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_add (GtkContainer *container,
|
|
GtkWidget *child)
|
|
{
|
|
GtkBin *bin;
|
|
|
|
g_return_if_fail (GTK_IS_VIEWPORT (container));
|
|
g_return_if_fail (child != NULL);
|
|
|
|
bin = GTK_BIN (container);
|
|
g_return_if_fail (bin->child == NULL);
|
|
|
|
gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window);
|
|
|
|
GTK_CONTAINER_CLASS (parent_class)->add (container, child);
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_size_request (GtkWidget *widget,
|
|
GtkRequisition *requisition)
|
|
{
|
|
GtkViewport *viewport;
|
|
GtkBin *bin;
|
|
GtkRequisition child_requisition;
|
|
|
|
g_return_if_fail (GTK_IS_VIEWPORT (widget));
|
|
g_return_if_fail (requisition != NULL);
|
|
|
|
viewport = GTK_VIEWPORT (widget);
|
|
bin = GTK_BIN (widget);
|
|
|
|
requisition->width = (GTK_CONTAINER (widget)->border_width +
|
|
GTK_WIDGET (widget)->style->xthickness) * 2 + 5;
|
|
|
|
requisition->height = (GTK_CONTAINER (widget)->border_width * 2 +
|
|
GTK_WIDGET (widget)->style->ythickness) * 2 + 5;
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
gtk_widget_size_request (bin->child, &child_requisition);
|
|
requisition->width += child_requisition.width;
|
|
requisition->height += child_requisition.height;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
GtkViewport *viewport;
|
|
GtkBin *bin;
|
|
GtkAllocation child_allocation;
|
|
gint hval, vval;
|
|
gint border_width;
|
|
|
|
g_return_if_fail (GTK_IS_VIEWPORT (widget));
|
|
g_return_if_fail (allocation != NULL);
|
|
|
|
widget->allocation = *allocation;
|
|
viewport = GTK_VIEWPORT (widget);
|
|
bin = GTK_BIN (widget);
|
|
|
|
/* demand creation */
|
|
if (!viewport->hadjustment)
|
|
gtk_viewport_set_hadjustment (viewport, NULL);
|
|
if (!viewport->vadjustment)
|
|
gtk_viewport_set_hadjustment (viewport, NULL);
|
|
|
|
border_width = GTK_CONTAINER (widget)->border_width;
|
|
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
|
|
if (viewport->shadow_type != GTK_SHADOW_NONE)
|
|
{
|
|
child_allocation.x = GTK_WIDGET (viewport)->style->xthickness;
|
|
child_allocation.y = GTK_WIDGET (viewport)->style->ythickness;
|
|
}
|
|
|
|
child_allocation.width = MAX (1, allocation->width - child_allocation.x * 2 - border_width * 2);
|
|
child_allocation.height = MAX (1, allocation->height - child_allocation.y * 2 - border_width * 2);
|
|
|
|
if (GTK_WIDGET_REALIZED (widget))
|
|
{
|
|
gdk_window_move_resize (widget->window,
|
|
allocation->x + border_width,
|
|
allocation->y + border_width,
|
|
allocation->width - border_width * 2,
|
|
allocation->height - border_width * 2);
|
|
|
|
gdk_window_move_resize (viewport->view_window,
|
|
child_allocation.x,
|
|
child_allocation.y,
|
|
child_allocation.width,
|
|
child_allocation.height);
|
|
}
|
|
|
|
viewport->hadjustment->page_size = child_allocation.width;
|
|
viewport->hadjustment->page_increment = viewport->hadjustment->page_size / 2;
|
|
viewport->hadjustment->step_increment = 10;
|
|
|
|
viewport->vadjustment->page_size = child_allocation.height;
|
|
viewport->vadjustment->page_increment = viewport->vadjustment->page_size / 2;
|
|
viewport->vadjustment->step_increment = 10;
|
|
|
|
hval = viewport->hadjustment->value;
|
|
vval = viewport->vadjustment->value;
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
GtkRequisition child_requisition;
|
|
gtk_widget_get_child_requisition (bin->child, &child_requisition);
|
|
|
|
viewport->hadjustment->lower = 0;
|
|
viewport->hadjustment->upper = MAX (child_requisition.width,
|
|
child_allocation.width);
|
|
|
|
hval = CLAMP (hval, 0,
|
|
viewport->hadjustment->upper -
|
|
viewport->hadjustment->page_size);
|
|
|
|
viewport->vadjustment->lower = 0;
|
|
viewport->vadjustment->upper = MAX (child_requisition.height,
|
|
child_allocation.height);
|
|
|
|
vval = CLAMP (vval, 0,
|
|
viewport->vadjustment->upper -
|
|
viewport->vadjustment->page_size);
|
|
}
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
|
|
child_allocation.width = viewport->hadjustment->upper;
|
|
child_allocation.height = viewport->vadjustment->upper;
|
|
|
|
if (GTK_WIDGET_REALIZED (widget))
|
|
gdk_window_resize (viewport->bin_window,
|
|
child_allocation.width,
|
|
child_allocation.height);
|
|
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
gtk_widget_size_allocate (bin->child, &child_allocation);
|
|
}
|
|
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "changed");
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "changed");
|
|
if (viewport->hadjustment->value != hval)
|
|
{
|
|
viewport->hadjustment->value = hval;
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "value_changed");
|
|
}
|
|
if (viewport->vadjustment->value != vval)
|
|
{
|
|
viewport->vadjustment->value = vval;
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "value_changed");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_adjustment_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
GtkViewport *viewport;
|
|
|
|
g_return_if_fail (adjustment != NULL);
|
|
g_return_if_fail (GTK_IS_VIEWPORT (data));
|
|
|
|
viewport = GTK_VIEWPORT (data);
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
GtkViewport *viewport;
|
|
GtkBin *bin;
|
|
GtkAllocation child_allocation;
|
|
|
|
g_return_if_fail (adjustment != NULL);
|
|
g_return_if_fail (GTK_IS_VIEWPORT (data));
|
|
|
|
viewport = GTK_VIEWPORT (data);
|
|
bin = GTK_BIN (data);
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
|
|
if (viewport->hadjustment->lower != (viewport->hadjustment->upper -
|
|
viewport->hadjustment->page_size))
|
|
child_allocation.x = viewport->hadjustment->lower - viewport->hadjustment->value;
|
|
|
|
if (viewport->vadjustment->lower != (viewport->vadjustment->upper -
|
|
viewport->vadjustment->page_size))
|
|
child_allocation.y = viewport->vadjustment->lower - viewport->vadjustment->value;
|
|
|
|
if (GTK_WIDGET_REALIZED (viewport))
|
|
{
|
|
gdk_window_move (viewport->bin_window,
|
|
child_allocation.x,
|
|
child_allocation.y);
|
|
|
|
gdk_window_process_updates (viewport->bin_window, TRUE);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_style_set (GtkWidget *widget,
|
|
GtkStyle *previous_style)
|
|
{
|
|
GtkViewport *viewport;
|
|
|
|
if (GTK_WIDGET_REALIZED (widget) &&
|
|
!GTK_WIDGET_NO_WINDOW (widget))
|
|
{
|
|
viewport = GTK_VIEWPORT (widget);
|
|
|
|
gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
|
|
gtk_style_set_background (widget->style, widget->window, widget->state);
|
|
}
|
|
}
|