forked from AuroraMiddleware/gtk
90408c4641
Sat Jul 4 13:16:24 1998 Tim Janik <timj@gtk.org>
* gtk/*.c: changed reversed_[12] to reserved_[12] in gtk_*_get_type
functions.
* gdk/gdkwindow.c:
* gdk/gdkvisual.c: check for some pointer values to be != NULL, prior
to XFree() calls.
580 lines
19 KiB
C
580 lines
19 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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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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#include "gtkscrolledwindow.h"
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#include "gtksignal.h"
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#define SCROLLBAR_SPACING(w) (GTK_SCROLLED_WINDOW_CLASS (GTK_OBJECT (w)->klass)->scrollbar_spacing)
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static void gtk_scrolled_window_class_init (GtkScrolledWindowClass *klass);
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static void gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window);
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static void gtk_scrolled_window_destroy (GtkObject *object);
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static void gtk_scrolled_window_finalize (GtkObject *object);
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static void gtk_scrolled_window_map (GtkWidget *widget);
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static void gtk_scrolled_window_unmap (GtkWidget *widget);
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static void gtk_scrolled_window_draw (GtkWidget *widget,
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GdkRectangle *area);
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static void gtk_scrolled_window_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_scrolled_window_add (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_scrolled_window_remove (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_scrolled_window_foreach (GtkContainer *container,
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GtkCallback callback,
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gpointer callback_data);
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static void gtk_scrolled_window_viewport_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
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gpointer data);
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static GtkContainerClass *parent_class = NULL;
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guint
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gtk_scrolled_window_get_type (void)
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{
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static guint scrolled_window_type = 0;
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if (!scrolled_window_type)
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{
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GtkTypeInfo scrolled_window_info =
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{
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"GtkScrolledWindow",
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sizeof (GtkScrolledWindow),
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sizeof (GtkScrolledWindowClass),
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(GtkClassInitFunc) gtk_scrolled_window_class_init,
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(GtkObjectInitFunc) gtk_scrolled_window_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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scrolled_window_type = gtk_type_unique (gtk_container_get_type (), &scrolled_window_info);
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}
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return scrolled_window_type;
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}
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static void
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gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
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{
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GtkObjectClass *object_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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widget_class = (GtkWidgetClass*) class;
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container_class = (GtkContainerClass*) class;
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parent_class = gtk_type_class (gtk_container_get_type ());
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object_class->destroy = gtk_scrolled_window_destroy;
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object_class->finalize = gtk_scrolled_window_finalize;
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widget_class->map = gtk_scrolled_window_map;
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widget_class->unmap = gtk_scrolled_window_unmap;
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widget_class->draw = gtk_scrolled_window_draw;
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widget_class->size_request = gtk_scrolled_window_size_request;
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widget_class->size_allocate = gtk_scrolled_window_size_allocate;
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container_class->add = gtk_scrolled_window_add;
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container_class->remove = gtk_scrolled_window_remove;
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container_class->foreach = gtk_scrolled_window_foreach;
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class->scrollbar_spacing = 5;
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}
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static void
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gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
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{
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GTK_WIDGET_SET_FLAGS (scrolled_window, GTK_NO_WINDOW);
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gtk_container_set_resize_mode (GTK_CONTAINER (scrolled_window), GTK_RESIZE_QUEUE);
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scrolled_window->hscrollbar = NULL;
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scrolled_window->vscrollbar = NULL;
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scrolled_window->hscrollbar_policy = GTK_POLICY_ALWAYS;
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scrolled_window->vscrollbar_policy = GTK_POLICY_ALWAYS;
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}
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GtkWidget*
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gtk_scrolled_window_new (GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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GtkWidget *scrolled_window;
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scrolled_window = gtk_type_new (gtk_scrolled_window_get_type ());
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gtk_scrolled_window_construct (GTK_SCROLLED_WINDOW (scrolled_window), hadjustment, vadjustment);
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return scrolled_window;
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}
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void
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gtk_scrolled_window_construct (GtkScrolledWindow *scrolled_window,
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GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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g_return_if_fail (scrolled_window != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
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g_return_if_fail (scrolled_window->viewport == NULL);
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scrolled_window->viewport = gtk_viewport_new (hadjustment, vadjustment);
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hadjustment = gtk_viewport_get_hadjustment (GTK_VIEWPORT (scrolled_window->viewport));
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vadjustment = gtk_viewport_get_vadjustment (GTK_VIEWPORT (scrolled_window->viewport));
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gtk_container_set_resize_mode (GTK_CONTAINER (scrolled_window->viewport), GTK_RESIZE_PARENT);
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gtk_signal_connect (GTK_OBJECT (hadjustment), "changed",
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(GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
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(gpointer) scrolled_window);
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gtk_signal_connect (GTK_OBJECT (vadjustment), "changed",
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(GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
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(gpointer) scrolled_window);
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scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
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scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment);
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gtk_widget_set_parent (scrolled_window->viewport, GTK_WIDGET (scrolled_window));
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gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window));
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gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window));
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gtk_widget_show (scrolled_window->viewport);
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gtk_widget_show (scrolled_window->hscrollbar);
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gtk_widget_show (scrolled_window->vscrollbar);
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gtk_widget_ref (scrolled_window->viewport);
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gtk_widget_ref (scrolled_window->hscrollbar);
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gtk_widget_ref (scrolled_window->vscrollbar);
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}
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GtkAdjustment*
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gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
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{
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g_return_val_if_fail (scrolled_window != NULL, NULL);
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g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
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return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
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}
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GtkAdjustment*
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gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
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{
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g_return_val_if_fail (scrolled_window != NULL, NULL);
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g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
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return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
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}
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void
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gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
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GtkPolicyType hscrollbar_policy,
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GtkPolicyType vscrollbar_policy)
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{
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g_return_if_fail (scrolled_window != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
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if ((scrolled_window->hscrollbar_policy != hscrollbar_policy) ||
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(scrolled_window->vscrollbar_policy != vscrollbar_policy))
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{
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scrolled_window->hscrollbar_policy = hscrollbar_policy;
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scrolled_window->vscrollbar_policy = vscrollbar_policy;
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if (GTK_WIDGET (scrolled_window)->parent)
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gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
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}
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}
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static void
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gtk_scrolled_window_destroy (GtkObject *object)
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{
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GtkScrolledWindow *scrolled_window;
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g_return_if_fail (object != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (object));
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scrolled_window = GTK_SCROLLED_WINDOW (object);
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gtk_widget_destroy (scrolled_window->viewport);
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gtk_widget_destroy (scrolled_window->hscrollbar);
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gtk_widget_destroy (scrolled_window->vscrollbar);
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
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}
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static void
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gtk_scrolled_window_finalize (GtkObject *object)
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{
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GtkScrolledWindow *scrolled_window;
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scrolled_window = GTK_SCROLLED_WINDOW (object);
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gtk_widget_unref (scrolled_window->viewport);
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gtk_widget_unref (scrolled_window->hscrollbar);
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gtk_widget_unref (scrolled_window->vscrollbar);
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GTK_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gtk_scrolled_window_map (GtkWidget *widget)
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{
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GtkScrolledWindow *scrolled_window;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
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if (!GTK_WIDGET_MAPPED (widget))
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{
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GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
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scrolled_window = GTK_SCROLLED_WINDOW (widget);
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if (GTK_WIDGET_VISIBLE (scrolled_window->viewport) &&
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!GTK_WIDGET_MAPPED (scrolled_window->viewport))
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gtk_widget_map (scrolled_window->viewport);
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if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
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!GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
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gtk_widget_map (scrolled_window->hscrollbar);
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if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
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!GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
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gtk_widget_map (scrolled_window->vscrollbar);
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}
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}
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static void
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gtk_scrolled_window_unmap (GtkWidget *widget)
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{
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GtkScrolledWindow *scrolled_window;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
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if (GTK_WIDGET_MAPPED (widget))
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{
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GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
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scrolled_window = GTK_SCROLLED_WINDOW (widget);
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if (GTK_WIDGET_MAPPED (scrolled_window->viewport))
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gtk_widget_unmap (scrolled_window->viewport);
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if (GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
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gtk_widget_unmap (scrolled_window->hscrollbar);
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if (GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
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gtk_widget_unmap (scrolled_window->vscrollbar);
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}
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}
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static void
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gtk_scrolled_window_draw (GtkWidget *widget,
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GdkRectangle *area)
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{
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GtkScrolledWindow *scrolled_window;
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GdkRectangle child_area;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
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g_return_if_fail (area != NULL);
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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scrolled_window = GTK_SCROLLED_WINDOW (widget);
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if (gtk_widget_intersect (scrolled_window->viewport, area, &child_area))
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gtk_widget_draw (scrolled_window->viewport, &child_area);
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if (gtk_widget_intersect (scrolled_window->hscrollbar, area, &child_area))
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gtk_widget_draw (scrolled_window->hscrollbar, &child_area);
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if (gtk_widget_intersect (scrolled_window->vscrollbar, area, &child_area))
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gtk_widget_draw (scrolled_window->vscrollbar, &child_area);
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}
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}
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static void
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gtk_scrolled_window_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkScrolledWindow *scrolled_window;
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gint extra_height;
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gint extra_width;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
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g_return_if_fail (requisition != NULL);
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scrolled_window = GTK_SCROLLED_WINDOW (widget);
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requisition->width = 0;
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requisition->height = 0;
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if (GTK_WIDGET_VISIBLE (scrolled_window->viewport))
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{
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gtk_widget_size_request (scrolled_window->viewport, &scrolled_window->viewport->requisition);
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requisition->width += scrolled_window->viewport->requisition.width;
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requisition->height += scrolled_window->viewport->requisition.height;
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}
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extra_width = 0;
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extra_height = 0;
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if ((scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
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GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
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{
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gtk_widget_size_request (scrolled_window->hscrollbar,
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&scrolled_window->hscrollbar->requisition);
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requisition->width = MAX (requisition->width, scrolled_window->hscrollbar->requisition.width);
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extra_height = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->hscrollbar->requisition.height;
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}
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if ((scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
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GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
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{
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gtk_widget_size_request (scrolled_window->vscrollbar,
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&scrolled_window->vscrollbar->requisition);
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requisition->height = MAX (requisition->height, scrolled_window->vscrollbar->requisition.height);
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extra_width = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->vscrollbar->requisition.width;
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}
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requisition->width += GTK_CONTAINER (widget)->border_width * 2 + extra_width;
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requisition->height += GTK_CONTAINER (widget)->border_width * 2 + extra_height;
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}
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static void
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gtk_scrolled_window_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkScrolledWindow *scrolled_window;
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GtkAllocation viewport_allocation;
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GtkAllocation child_allocation;
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guint previous_hvis;
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guint previous_vvis;
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gint count;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
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g_return_if_fail (allocation != NULL);
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scrolled_window = GTK_SCROLLED_WINDOW (widget);
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widget->allocation = *allocation;
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if (scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
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scrolled_window->hscrollbar_visible = TRUE;
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if (scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
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scrolled_window->vscrollbar_visible = TRUE;
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if (GTK_WIDGET_VISIBLE (scrolled_window->viewport))
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{
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count = 0;
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do {
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gtk_scrolled_window_viewport_allocate (widget, &viewport_allocation);
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child_allocation.x = viewport_allocation.x + allocation->x;
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child_allocation.y = viewport_allocation.y + allocation->y;
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child_allocation.width = viewport_allocation.width;
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child_allocation.height = viewport_allocation.height;
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previous_hvis = scrolled_window->hscrollbar_visible;
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previous_vvis = scrolled_window->vscrollbar_visible;
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gtk_widget_size_allocate (scrolled_window->viewport, &child_allocation);
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/* If, after the first iteration, the hscrollbar and the
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* vscrollbar flip visiblity, then we need both.
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*/
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if ((count++) &&
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(previous_hvis != scrolled_window->hscrollbar_visible) &&
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(previous_vvis != scrolled_window->vscrollbar_visible))
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{
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scrolled_window->hscrollbar_visible = TRUE;
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scrolled_window->vscrollbar_visible = TRUE;
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break;
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}
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count++;
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} while ((previous_hvis != scrolled_window->hscrollbar_visible) ||
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(previous_vvis != scrolled_window->vscrollbar_visible));
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}
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if (scrolled_window->hscrollbar_visible)
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{
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if (!GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
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gtk_widget_show (scrolled_window->hscrollbar);
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child_allocation.x = viewport_allocation.x;
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child_allocation.y = viewport_allocation.y + viewport_allocation.height + SCROLLBAR_SPACING (scrolled_window);
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child_allocation.width = viewport_allocation.width;
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child_allocation.height = scrolled_window->hscrollbar->requisition.height;
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child_allocation.x += allocation->x;
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child_allocation.y += allocation->y;
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gtk_widget_size_allocate (scrolled_window->hscrollbar, &child_allocation);
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}
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else
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{
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if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
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gtk_widget_hide (scrolled_window->hscrollbar);
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}
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if (scrolled_window->vscrollbar_visible)
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{
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if (!GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
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gtk_widget_show (scrolled_window->vscrollbar);
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child_allocation.x = viewport_allocation.x + viewport_allocation.width + SCROLLBAR_SPACING (scrolled_window);
|
|
child_allocation.y = viewport_allocation.y;
|
|
child_allocation.width = scrolled_window->vscrollbar->requisition.width;
|
|
child_allocation.height = viewport_allocation.height;
|
|
child_allocation.x += allocation->x;
|
|
child_allocation.y += allocation->y;
|
|
|
|
gtk_widget_size_allocate (scrolled_window->vscrollbar, &child_allocation);
|
|
}
|
|
else
|
|
{
|
|
if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
|
|
gtk_widget_hide (scrolled_window->vscrollbar);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_scrolled_window_add (GtkContainer *container,
|
|
GtkWidget *widget)
|
|
{
|
|
GtkScrolledWindow *scrolled_window;
|
|
|
|
g_return_if_fail (container != NULL);
|
|
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
|
|
g_return_if_fail (widget != NULL);
|
|
|
|
scrolled_window = GTK_SCROLLED_WINDOW (container);
|
|
gtk_container_add (GTK_CONTAINER (scrolled_window->viewport), widget);
|
|
}
|
|
|
|
static void
|
|
gtk_scrolled_window_remove (GtkContainer *container,
|
|
GtkWidget *widget)
|
|
{
|
|
GtkScrolledWindow *scrolled_window;
|
|
|
|
g_return_if_fail (container != NULL);
|
|
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
|
|
g_return_if_fail (widget != NULL);
|
|
|
|
scrolled_window = GTK_SCROLLED_WINDOW (container);
|
|
|
|
if (scrolled_window->viewport == widget ||
|
|
scrolled_window->hscrollbar == widget ||
|
|
scrolled_window->vscrollbar == widget)
|
|
{
|
|
/* this happens during destroy */
|
|
gtk_widget_unparent (widget);
|
|
}
|
|
else
|
|
gtk_container_remove (GTK_CONTAINER (scrolled_window->viewport), widget);
|
|
}
|
|
|
|
static void
|
|
gtk_scrolled_window_foreach (GtkContainer *container,
|
|
GtkCallback callback,
|
|
gpointer callback_data)
|
|
{
|
|
GtkScrolledWindow *scrolled_window;
|
|
|
|
g_return_if_fail (container != NULL);
|
|
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
|
|
g_return_if_fail (callback != NULL);
|
|
|
|
scrolled_window = GTK_SCROLLED_WINDOW (container);
|
|
|
|
if (scrolled_window->viewport)
|
|
(* callback) (scrolled_window->viewport, callback_data);
|
|
|
|
(* callback) (scrolled_window->vscrollbar, callback_data);
|
|
(* callback) (scrolled_window->hscrollbar, callback_data);
|
|
}
|
|
|
|
static void
|
|
gtk_scrolled_window_viewport_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
GtkScrolledWindow *scrolled_window;
|
|
|
|
g_return_if_fail (widget != NULL);
|
|
g_return_if_fail (allocation != NULL);
|
|
|
|
scrolled_window = GTK_SCROLLED_WINDOW (widget);
|
|
|
|
allocation->x = GTK_CONTAINER (widget)->border_width;
|
|
allocation->y = GTK_CONTAINER (widget)->border_width;
|
|
allocation->width = MAX (1, widget->allocation.width - allocation->x * 2);
|
|
allocation->height = MAX (1, widget->allocation.height - allocation->y * 2);
|
|
|
|
if (scrolled_window->vscrollbar_visible)
|
|
allocation->width = MAX (1,
|
|
allocation->width - (scrolled_window->vscrollbar->requisition.width + SCROLLBAR_SPACING (scrolled_window)));
|
|
if (scrolled_window->hscrollbar_visible)
|
|
allocation->height = MAX (1,
|
|
allocation->height - (scrolled_window->hscrollbar->requisition.height + SCROLLBAR_SPACING (scrolled_window)));
|
|
}
|
|
|
|
static void
|
|
gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
GtkScrolledWindow *scrolled_win;
|
|
|
|
g_return_if_fail (adjustment != NULL);
|
|
g_return_if_fail (data != NULL);
|
|
|
|
scrolled_win = GTK_SCROLLED_WINDOW (data);
|
|
|
|
if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->hscrollbar)))
|
|
{
|
|
if (scrolled_win->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
|
|
{
|
|
scrolled_win->hscrollbar_visible =
|
|
((adjustment->upper - adjustment->lower) > adjustment->page_size);
|
|
}
|
|
}
|
|
else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->vscrollbar)))
|
|
{
|
|
if (scrolled_win->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
|
|
{
|
|
scrolled_win->vscrollbar_visible =
|
|
((adjustment->upper - adjustment->lower) > adjustment->page_size);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
g_warning ("could not determine which adjustment scrollbar received change signal for");
|
|
return;
|
|
}
|
|
}
|