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 GtkType
  39 gtk_hpaned_get_type (void)
  40 {
  41   static GtkType hpaned_type = 0;
  42
  43   if (!hpaned_type)
  44     {
  45       static const GtkTypeInfo hpaned_info =
  46       {
  47         "GtkHPaned",
  48         sizeof (GtkHPaned),
  49         sizeof (GtkHPanedClass),
  50         (GtkClassInitFunc) gtk_hpaned_class_init,
  51         (GtkObjectInitFunc) gtk_hpaned_init,
  52         /* reserved_1 */ NULL,
  53         /* reserved_2 */ NULL,
  54         (GtkClassInitFunc) NULL,
  55       };
  56
  57       hpaned_type = gtk_type_unique (GTK_TYPE_PANED, &hpaned_info);
  58     }
  59
  60   return hpaned_type;
  61 }
  62
  63 static void
  64 gtk_hpaned_class_init (GtkHPanedClass *class)
  65 {
  66   GtkWidgetClass *widget_class;
  67
  68   parent_class = gtk_type_class (GTK_TYPE_PANED);
  69
  70   widget_class = (GtkWidgetClass *) class;
  71
  72   widget_class->size_request = gtk_hpaned_size_request;
  73   widget_class->size_allocate = gtk_hpaned_size_allocate;
  74 }
  75
  76 static void
  77 gtk_hpaned_init (GtkHPaned *hpaned)
  78 {
  79   GtkPaned *paned;
  80
  81   g_return_if_fail (GTK_IS_PANED (hpaned));
  82
  83   paned = GTK_PANED (hpaned);
  84
  85   paned->cursor_type = GDK_SB_H_DOUBLE_ARROW;
  86   paned->orientation = GTK_ORIENTATION_VERTICAL;
  87 }
  88
  89 GtkWidget *
  90 gtk_hpaned_new (void)
  91 {
  92   GtkHPaned *hpaned;
  93
  94   hpaned = gtk_type_new (GTK_TYPE_HPANED);
  95
  96   return GTK_WIDGET (hpaned);
  97 }
  98
  99 static void
 100 gtk_hpaned_size_request (GtkWidget      *widget,
 101                          GtkRequisition *requisition)
 102 {
 103   GtkPaned *paned = GTK_PANED (widget);
 104   GtkRequisition child_requisition;
 105
 106   requisition->width = 0;
 107   requisition->height = 0;
 108
 109   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 110     {
 111       gtk_widget_size_request (paned->child1, &child_requisition);
 112
 113       requisition->height = child_requisition.height;
 114       requisition->width = child_requisition.width;
 115     }
 116
 117   if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 118     {
 119       gtk_widget_size_request (paned->child2, &child_requisition);
 120
 121       requisition->height = MAX(requisition->height, child_requisition.height);
 122       requisition->width += child_requisition.width;
 123     }
 124
 125   requisition->width += GTK_CONTAINER (paned)->border_width * 2;
 126   requisition->height += GTK_CONTAINER (paned)->border_width * 2;
 127
 128   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 129       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 130     {
 131       gint handle_size;
 132
 133       gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
 134       requisition->width += handle_size;
 135     }
 136 }
 137
 138 static void
 139 gtk_hpaned_size_allocate (GtkWidget     *widget,
 140                           GtkAllocation *allocation)
 141 {
 142   GtkPaned *paned = GTK_PANED (widget);
 143   gint border_width = GTK_CONTAINER (paned)->border_width;
 144
 145   widget->allocation = *allocation;
 146
 147   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 148       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 149     {
 150       GtkAllocation child1_allocation;
 151       GtkAllocation child2_allocation;
 152       GtkRequisition child1_requisition;
 153       GtkRequisition child2_requisition;
 154       gint handle_size;
 155
 156       gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
 157
 158       gtk_widget_get_child_requisition (paned->child1, &child1_requisition);
 159       gtk_widget_get_child_requisition (paned->child2, &child2_requisition);
 160
 161       gtk_paned_compute_position (paned,
 162                                   MAX (1, widget->allocation.width
 163                                        - handle_size
 164                                        - 2 * border_width),
 165                                   child1_requisition.width,
 166                                   child2_requisition.width);
 167
 168       paned->handle_pos.x = widget->allocation.x + paned->child1_size + border_width;
 169       paned->handle_pos.y = widget->allocation.y + border_width;
 170       paned->handle_pos.width = handle_size;
 171       paned->handle_pos.height = MAX (1, widget->allocation.height - 2 * border_width);
 172
 173       if (GTK_WIDGET_REALIZED (widget))
 174         {
 175           if (GTK_WIDGET_MAPPED (widget))
 176             gdk_window_show (paned->handle);
 177           gdk_window_move_resize (paned->handle,
 178                                   paned->handle_pos.x,
 179                                   paned->handle_pos.y,
 180                                   handle_size,
 181                                   paned->handle_pos.height);
 182         }
 183
 184       child1_allocation.height = child2_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
 185       child1_allocation.width = paned->child1_size;
 186       child1_allocation.x = widget->allocation.x + border_width;
 187       child1_allocation.y = child2_allocation.y = widget->allocation.y + border_width;
 188
 189       child2_allocation.x = child1_allocation.x + child1_allocation.width +  paned->handle_pos.width;
 190       child2_allocation.width = MAX (1, widget->allocation.x + widget->allocation.width - child2_allocation.x - border_width);
 191
 192       /* Now allocate the childen, making sure, when resizing not to
 193        * overlap the windows
 194        */
 195       if (GTK_WIDGET_MAPPED (widget) &&
 196           paned->child1->allocation.width < child1_allocation.width)
 197         {
 198           gtk_widget_size_allocate (paned->child2, &child2_allocation);
 199           gtk_widget_size_allocate (paned->child1, &child1_allocation);
 200         }
 201       else
 202         {
 203           gtk_widget_size_allocate (paned->child1, &child1_allocation);
 204           gtk_widget_size_allocate (paned->child2, &child2_allocation);
 205         }
 206     }
 207   else
 208     {
 209       GtkAllocation child_allocation;
 210
 211       if (GTK_WIDGET_REALIZED (widget))
 212         gdk_window_hide (paned->handle);
 213
 214       child_allocation.x = widget->allocation.x + border_width;
 215       child_allocation.y = widget->allocation.y + border_width;
 216       child_allocation.width = MAX (1, allocation->width - 2 * border_width);
 217       child_allocation.height = MAX (1, allocation->height - 2 * border_width);
 218
 219       if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 220         gtk_widget_size_allocate (paned->child1, &child_allocation);
 221       else if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 222         gtk_widget_size_allocate (paned->child2, &child_allocation);
 223     }
 224 }