Pileus Git - ~andy/gtk/blob - gtk/gtkhpaned.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtkhpaned.h"
  28
  29 static void     gtk_hpaned_class_init     (GtkHPanedClass *klass);
  30 static void     gtk_hpaned_init           (GtkHPaned      *hpaned);
  31 static void     gtk_hpaned_size_request   (GtkWidget      *widget,
  32                                            GtkRequisition *requisition);
  33 static void     gtk_hpaned_size_allocate  (GtkWidget      *widget,
  34                                            GtkAllocation  *allocation);
  35
  36 static gpointer parent_class;
  37
  38 GType
  39 gtk_hpaned_get_type (void)
  40 {
  41   static GType hpaned_type = 0;
  42
  43   if (!hpaned_type)
  44     {
  45       static const GTypeInfo hpaned_info =
  46       {
  47         sizeof (GtkHPanedClass),
  48         NULL,           /* base_init */
  49         NULL,           /* base_finalize */
  50         (GClassInitFunc) gtk_hpaned_class_init,
  51         NULL,           /* class_finalize */
  52         NULL,           /* class_data */
  53         sizeof (GtkHPaned),
  54         0,              /* n_preallocs */
  55         (GInstanceInitFunc) gtk_hpaned_init,
  56       };
  57
  58       hpaned_type = g_type_register_static (GTK_TYPE_PANED, "GtkHPaned",
  59                                             &hpaned_info, 0);
  60     }
  61
  62   return hpaned_type;
  63 }
  64
  65 static void
  66 gtk_hpaned_class_init (GtkHPanedClass *class)
  67 {
  68   GtkWidgetClass *widget_class;
  69
  70   parent_class = g_type_class_peek_parent (class);
  71
  72   widget_class = (GtkWidgetClass *) class;
  73
  74   widget_class->size_request = gtk_hpaned_size_request;
  75   widget_class->size_allocate = gtk_hpaned_size_allocate;
  76 }
  77
  78 static void
  79 gtk_hpaned_init (GtkHPaned *hpaned)
  80 {
  81   GtkPaned *paned;
  82
  83   g_return_if_fail (GTK_IS_PANED (hpaned));
  84
  85   paned = GTK_PANED (hpaned);
  86
  87   paned->cursor_type = GDK_SB_H_DOUBLE_ARROW;
  88   paned->orientation = GTK_ORIENTATION_VERTICAL;
  89 }
  90
  91 GtkWidget *
  92 gtk_hpaned_new (void)
  93 {
  94   GtkHPaned *hpaned;
  95
  96   hpaned = g_object_new (GTK_TYPE_HPANED, NULL);
  97
  98   return GTK_WIDGET (hpaned);
  99 }
 100
 101 static void
 102 gtk_hpaned_size_request (GtkWidget      *widget,
 103                          GtkRequisition *requisition)
 104 {
 105   GtkPaned *paned = GTK_PANED (widget);
 106   GtkRequisition child_requisition;
 107
 108   requisition->width = 0;
 109   requisition->height = 0;
 110
 111   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 112     {
 113       gtk_widget_size_request (paned->child1, &child_requisition);
 114
 115       requisition->height = child_requisition.height;
 116       requisition->width = child_requisition.width;
 117     }
 118
 119   if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 120     {
 121       gtk_widget_size_request (paned->child2, &child_requisition);
 122
 123       requisition->height = MAX(requisition->height, child_requisition.height);
 124       requisition->width += child_requisition.width;
 125     }
 126
 127   requisition->width += GTK_CONTAINER (paned)->border_width * 2;
 128   requisition->height += GTK_CONTAINER (paned)->border_width * 2;
 129
 130   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 131       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 132     {
 133       gint handle_size;
 134
 135       gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
 136       requisition->width += handle_size;
 137     }
 138 }
 139
 140 static void
 141 gtk_hpaned_size_allocate (GtkWidget     *widget,
 142                           GtkAllocation *allocation)
 143 {
 144   GtkPaned *paned = GTK_PANED (widget);
 145   gint border_width = GTK_CONTAINER (paned)->border_width;
 146
 147   widget->allocation = *allocation;
 148
 149   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 150       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 151     {
 152       GtkAllocation child1_allocation;
 153       GtkAllocation child2_allocation;
 154       GtkRequisition child1_requisition;
 155       GtkRequisition child2_requisition;
 156       gint handle_size;
 157
 158       gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
 159
 160       gtk_widget_get_child_requisition (paned->child1, &child1_requisition);
 161       gtk_widget_get_child_requisition (paned->child2, &child2_requisition);
 162
 163       gtk_paned_compute_position (paned,
 164                                   MAX (1, widget->allocation.width
 165                                        - handle_size
 166                                        - 2 * border_width),
 167                                   child1_requisition.width,
 168                                   child2_requisition.width);
 169
 170       paned->handle_pos.x = widget->allocation.x + paned->child1_size + border_width;
 171       paned->handle_pos.y = widget->allocation.y + border_width;
 172       paned->handle_pos.width = handle_size;
 173       paned->handle_pos.height = MAX (1, widget->allocation.height - 2 * border_width);
 174
 175       if (GTK_WIDGET_REALIZED (widget))
 176         {
 177           if (GTK_WIDGET_MAPPED (widget))
 178             gdk_window_show (paned->handle);
 179           gdk_window_move_resize (paned->handle,
 180                                   paned->handle_pos.x,
 181                                   paned->handle_pos.y,
 182                                   handle_size,
 183                                   paned->handle_pos.height);
 184         }
 185
 186       child1_allocation.height = child2_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
 187       child1_allocation.width = MAX (1, paned->child1_size);
 188       child1_allocation.x = widget->allocation.x + border_width;
 189       child1_allocation.y = child2_allocation.y = widget->allocation.y + border_width;
 190
 191       child2_allocation.x = child1_allocation.x + paned->child1_size + paned->handle_pos.width;
 192       child2_allocation.width = MAX (1, widget->allocation.x + widget->allocation.width - child2_allocation.x - border_width);
 193
 194       /* Now allocate the childen, making sure, when resizing not to
 195        * overlap the windows
 196        */
 197       if (GTK_WIDGET_MAPPED (widget) &&
 198           paned->child1->allocation.width < child1_allocation.width)
 199         {
 200           gtk_widget_size_allocate (paned->child2, &child2_allocation);
 201           gtk_widget_size_allocate (paned->child1, &child1_allocation);
 202         }
 203       else
 204         {
 205           gtk_widget_size_allocate (paned->child1, &child1_allocation);
 206           gtk_widget_size_allocate (paned->child2, &child2_allocation);
 207         }
 208     }
 209   else
 210     {
 211       GtkAllocation child_allocation;
 212
 213       if (GTK_WIDGET_REALIZED (widget))
 214         gdk_window_hide (paned->handle);
 215
 216       if (paned->child1)
 217         gtk_widget_set_child_visible (paned->child1, TRUE);
 218       if (paned->child2)
 219         gtk_widget_set_child_visible (paned->child2, TRUE);
 220
 221       child_allocation.x = widget->allocation.x + border_width;
 222       child_allocation.y = widget->allocation.y + border_width;
 223       child_allocation.width = MAX (1, allocation->width - 2 * border_width);
 224       child_allocation.height = MAX (1, allocation->height - 2 * border_width);
 225
 226       if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 227         gtk_widget_size_allocate (paned->child1, &child_allocation);
 228       else if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 229         gtk_widget_size_allocate (paned->child2, &child_allocation);
 230     }
 231 }