forked from AuroraMiddleware/gtk
ef3b6dbe71
Thu Dec 6 23:09:21 2001 Owen Taylor <otaylor@redhat.com>
* gtk/gtk[hv]paned.c (gtk_[hv]paned_size_allocate): Fix errors
in computing the size of the second child.
350 lines
10 KiB
C
350 lines
10 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 "gtkhpaned.h"
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static void gtk_hpaned_class_init (GtkHPanedClass *klass);
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static void gtk_hpaned_init (GtkHPaned *hpaned);
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static void gtk_hpaned_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_hpaned_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_hpaned_xor_line (GtkPaned *paned);
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static gboolean gtk_hpaned_button_press (GtkWidget *widget,
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GdkEventButton *event);
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static gboolean gtk_hpaned_button_release (GtkWidget *widget,
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GdkEventButton *event);
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static gboolean gtk_hpaned_motion (GtkWidget *widget,
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GdkEventMotion *event);
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static gpointer parent_class;
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GtkType
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gtk_hpaned_get_type (void)
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{
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static GtkType hpaned_type = 0;
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if (!hpaned_type)
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{
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static const GtkTypeInfo hpaned_info =
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{
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"GtkHPaned",
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sizeof (GtkHPaned),
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sizeof (GtkHPanedClass),
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(GtkClassInitFunc) gtk_hpaned_class_init,
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(GtkObjectInitFunc) gtk_hpaned_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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hpaned_type = gtk_type_unique (GTK_TYPE_PANED, &hpaned_info);
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}
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return hpaned_type;
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}
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static void
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gtk_hpaned_class_init (GtkHPanedClass *class)
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{
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GtkWidgetClass *widget_class;
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parent_class = gtk_type_class (GTK_TYPE_PANED);
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widget_class = (GtkWidgetClass *) class;
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widget_class->size_request = gtk_hpaned_size_request;
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widget_class->size_allocate = gtk_hpaned_size_allocate;
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widget_class->button_press_event = gtk_hpaned_button_press;
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widget_class->button_release_event = gtk_hpaned_button_release;
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widget_class->motion_notify_event = gtk_hpaned_motion;
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}
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static void
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gtk_hpaned_init (GtkHPaned *hpaned)
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{
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GtkPaned *paned;
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g_return_if_fail (GTK_IS_PANED (hpaned));
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paned = GTK_PANED (hpaned);
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paned->cursor_type = GDK_SB_H_DOUBLE_ARROW;
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paned->orientation = GTK_ORIENTATION_VERTICAL;
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}
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GtkWidget *
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gtk_hpaned_new (void)
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{
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GtkHPaned *hpaned;
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hpaned = gtk_type_new (GTK_TYPE_HPANED);
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return GTK_WIDGET (hpaned);
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}
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static void
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gtk_hpaned_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkPaned *paned = GTK_PANED (widget);
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GtkRequisition child_requisition;
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requisition->width = 0;
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requisition->height = 0;
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if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
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{
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gtk_widget_size_request (paned->child1, &child_requisition);
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requisition->height = child_requisition.height;
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requisition->width = child_requisition.width;
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}
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if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
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{
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gtk_widget_size_request (paned->child2, &child_requisition);
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requisition->height = MAX(requisition->height, child_requisition.height);
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requisition->width += child_requisition.width;
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}
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requisition->width += GTK_CONTAINER (paned)->border_width * 2;
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requisition->height += GTK_CONTAINER (paned)->border_width * 2;
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if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
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paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
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{
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gint handle_size;
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gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
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requisition->width += handle_size;
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}
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}
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static void
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gtk_hpaned_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkPaned *paned = GTK_PANED (widget);
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gint border_width = GTK_CONTAINER (paned)->border_width;
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widget->allocation = *allocation;
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if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
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paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
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{
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GtkAllocation child1_allocation;
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GtkAllocation child2_allocation;
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GtkRequisition child1_requisition;
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GtkRequisition child2_requisition;
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gint handle_size;
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gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
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gtk_widget_get_child_requisition (paned->child1, &child1_requisition);
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gtk_widget_get_child_requisition (paned->child2, &child2_requisition);
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gtk_paned_compute_position (paned,
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MAX (1, widget->allocation.width
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- handle_size
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- 2 * border_width),
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child1_requisition.width,
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child2_requisition.width);
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paned->handle_pos.x = widget->allocation.x + paned->child1_size + border_width;
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paned->handle_pos.y = widget->allocation.y + border_width;
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paned->handle_pos.width = handle_size;
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paned->handle_pos.height = MAX (1, widget->allocation.height - 2 * border_width);
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if (GTK_WIDGET_REALIZED (widget))
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{
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gdk_window_show (paned->handle);
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gdk_window_move_resize (paned->handle,
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paned->handle_pos.x,
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paned->handle_pos.y,
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handle_size,
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paned->handle_pos.height);
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}
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child1_allocation.height = child2_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
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child1_allocation.width = paned->child1_size;
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child1_allocation.x = widget->allocation.x + border_width;
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child1_allocation.y = child2_allocation.y = widget->allocation.y + border_width;
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child2_allocation.x = child1_allocation.x + child1_allocation.width + paned->handle_pos.width;
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child2_allocation.width = MAX (1, widget->allocation.x + widget->allocation.width - child2_allocation.x - border_width);
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/* Now allocate the childen, making sure, when resizing not to
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* overlap the windows
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*/
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if (GTK_WIDGET_MAPPED (widget) &&
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paned->child1->allocation.width < child1_allocation.width)
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{
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gtk_widget_size_allocate (paned->child2, &child2_allocation);
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gtk_widget_size_allocate (paned->child1, &child1_allocation);
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}
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else
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{
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gtk_widget_size_allocate (paned->child1, &child1_allocation);
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gtk_widget_size_allocate (paned->child2, &child2_allocation);
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}
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}
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else
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{
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GtkAllocation child_allocation;
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if (GTK_WIDGET_REALIZED (widget))
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gdk_window_hide (paned->handle);
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child_allocation.x = widget->allocation.x + border_width;
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child_allocation.y = widget->allocation.y + border_width;
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child_allocation.width = MAX (1, allocation->width - 2 * border_width);
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child_allocation.height = MAX (1, allocation->height - 2 * border_width);
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if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
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gtk_widget_size_allocate (paned->child1, &child_allocation);
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else if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
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gtk_widget_size_allocate (paned->child2, &child_allocation);
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}
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}
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static void
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gtk_hpaned_xor_line (GtkPaned *paned)
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{
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GtkWidget *widget;
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GdkGCValues values;
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guint16 xpos;
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gint handle_size;
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widget = GTK_WIDGET (paned);
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gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
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if (!paned->xor_gc)
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{
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values.function = GDK_INVERT;
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values.subwindow_mode = GDK_INCLUDE_INFERIORS;
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paned->xor_gc = gdk_gc_new_with_values (widget->window,
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&values,
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GDK_GC_FUNCTION | GDK_GC_SUBWINDOW);
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}
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gdk_gc_set_line_attributes (paned->xor_gc, 2, GDK_LINE_SOLID,
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GDK_CAP_NOT_LAST, GDK_JOIN_BEVEL);
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xpos = widget->allocation.x + paned->child1_size
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+ GTK_CONTAINER (paned)->border_width + handle_size / 2;
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gdk_draw_line (widget->window, paned->xor_gc,
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xpos,
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widget->allocation.y,
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xpos,
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widget->allocation.y + widget->allocation.height - 1);
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}
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static gboolean
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gtk_hpaned_button_press (GtkWidget *widget,
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GdkEventButton *event)
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{
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GtkPaned *paned = GTK_PANED (widget);
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gint handle_size;
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gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
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if (!paned->in_drag &&
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event->window == paned->handle && event->button == 1)
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{
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paned->in_drag = TRUE;
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/* We need a server grab here, not gtk_grab_add(), since
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* we don't want to pass events on to the widget's children */
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gdk_pointer_grab(paned->handle, FALSE,
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GDK_POINTER_MOTION_HINT_MASK
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| GDK_BUTTON1_MOTION_MASK
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| GDK_BUTTON_RELEASE_MASK,
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NULL, NULL, event->time);
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paned->child1_size += event->x - handle_size / 2;
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paned->child1_size = CLAMP (paned->child1_size, 0,
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widget->allocation.width
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- handle_size
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- 2 * GTK_CONTAINER (paned)->border_width);
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gtk_hpaned_xor_line (paned);
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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gtk_hpaned_button_release (GtkWidget *widget,
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GdkEventButton *event)
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{
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GtkPaned *paned = GTK_PANED (widget);
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GObject *object = G_OBJECT (widget);
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if (paned->in_drag && (event->button == 1))
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{
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gtk_hpaned_xor_line (paned);
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paned->in_drag = FALSE;
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paned->position_set = TRUE;
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gdk_pointer_ungrab (event->time);
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gtk_widget_queue_resize (GTK_WIDGET (paned));
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g_object_freeze_notify (object);
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g_object_notify (object, "position");
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g_object_notify (object, "position_set");
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g_object_thaw_notify (object);
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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gtk_hpaned_motion (GtkWidget *widget,
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GdkEventMotion *event)
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{
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GtkPaned *paned = GTK_PANED (widget);
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gint x;
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gint handle_size;
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gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
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gtk_widget_get_pointer (widget, &x, NULL);
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if (paned->in_drag)
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{
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gint size = x - GTK_CONTAINER (paned)->border_width - handle_size / 2;
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gtk_hpaned_xor_line (paned);
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paned->child1_size = CLAMP (size, paned->min_position, paned->max_position);
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gtk_hpaned_xor_line (paned);
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}
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return TRUE;
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}
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