Pileus Git - ~andy/gtk/blob - gtk/gtkhbox.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 "config.h"
  28 #include "gtkhbox.h"
  29 #include "gtkintl.h"
  30 #include "gtkalias.h"
  31
  32
  33 static void gtk_hbox_size_request  (GtkWidget      *widget,
  34                                     GtkRequisition *requisition);
  35 static void gtk_hbox_size_allocate (GtkWidget      *widget,
  36                                     GtkAllocation  *allocation);
  37
  38
  39 G_DEFINE_TYPE (GtkHBox, gtk_hbox, GTK_TYPE_BOX)
  40
  41 static void
  42 gtk_hbox_class_init (GtkHBoxClass *class)
  43 {
  44   GtkWidgetClass *widget_class;
  45
  46   widget_class = (GtkWidgetClass*) class;
  47
  48   widget_class->size_request = gtk_hbox_size_request;
  49   widget_class->size_allocate = gtk_hbox_size_allocate;
  50 }
  51
  52 static void
  53 gtk_hbox_init (GtkHBox *hbox)
  54 {
  55 }
  56
  57 GtkWidget*
  58 gtk_hbox_new (gboolean homogeneous,
  59               gint spacing)
  60 {
  61   GtkHBox *hbox;
  62
  63   hbox = g_object_new (GTK_TYPE_HBOX, NULL);
  64
  65   GTK_BOX (hbox)->spacing = spacing;
  66   GTK_BOX (hbox)->homogeneous = homogeneous ? TRUE : FALSE;
  67
  68   return GTK_WIDGET (hbox);
  69 }
  70
  71
  72 static void
  73 gtk_hbox_size_request (GtkWidget      *widget,
  74                        GtkRequisition *requisition)
  75 {
  76   GtkBox *box;
  77   GtkBoxChild *child;
  78   GList *children;
  79   gint nvis_children;
  80   gint width;
  81
  82   box = GTK_BOX (widget);
  83   requisition->width = 0;
  84   requisition->height = 0;
  85   nvis_children = 0;
  86
  87   children = box->children;
  88   while (children)
  89     {
  90       child = children->data;
  91       children = children->next;
  92
  93       if (GTK_WIDGET_VISIBLE (child->widget))
  94         {
  95           GtkRequisition child_requisition;
  96
  97           gtk_widget_size_request (child->widget, &child_requisition);
  98
  99           if (box->homogeneous)
 100             {
 101               width = child_requisition.width + child->padding * 2;
 102               requisition->width = MAX (requisition->width, width);
 103             }
 104           else
 105             {
 106               requisition->width += child_requisition.width + child->padding * 2;
 107             }
 108
 109           requisition->height = MAX (requisition->height, child_requisition.height);
 110
 111           nvis_children += 1;
 112         }
 113     }
 114
 115   if (nvis_children > 0)
 116     {
 117       if (box->homogeneous)
 118         requisition->width *= nvis_children;
 119       requisition->width += (nvis_children - 1) * box->spacing;
 120     }
 121
 122   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 123   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 124 }
 125
 126 static void
 127 gtk_hbox_size_allocate (GtkWidget     *widget,
 128                         GtkAllocation *allocation)
 129 {
 130   GtkBox *box;
 131   GtkBoxChild *child;
 132   GList *children;
 133   GtkAllocation child_allocation;
 134   gint nvis_children;
 135   gint nexpand_children;
 136   gint child_width;
 137   gint width;
 138   gint extra;
 139   gint x;
 140   GtkTextDirection direction;
 141
 142   box = GTK_BOX (widget);
 143   widget->allocation = *allocation;
 144
 145   direction = gtk_widget_get_direction (widget);
 146
 147   nvis_children = 0;
 148   nexpand_children = 0;
 149   children = box->children;
 150
 151   while (children)
 152     {
 153       child = children->data;
 154       children = children->next;
 155
 156       if (GTK_WIDGET_VISIBLE (child->widget))
 157         {
 158           nvis_children += 1;
 159           if (child->expand)
 160             nexpand_children += 1;
 161         }
 162     }
 163
 164   if (nvis_children > 0)
 165     {
 166       if (box->homogeneous)
 167         {
 168           width = (allocation->width -
 169                    GTK_CONTAINER (box)->border_width * 2 -
 170                    (nvis_children - 1) * box->spacing);
 171           extra = width / nvis_children;
 172         }
 173       else if (nexpand_children > 0)
 174         {
 175           width = (gint) allocation->width - (gint) widget->requisition.width;
 176           extra = width / nexpand_children;
 177         }
 178       else
 179         {
 180           width = 0;
 181           extra = 0;
 182         }
 183
 184       x = allocation->x + GTK_CONTAINER (box)->border_width;
 185       child_allocation.y = allocation->y + GTK_CONTAINER (box)->border_width;
 186       child_allocation.height = MAX (1, (gint) allocation->height - (gint) GTK_CONTAINER (box)->border_width * 2);
 187
 188       children = box->children;
 189       while (children)
 190         {
 191           child = children->data;
 192           children = children->next;
 193
 194           if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
 195             {
 196               if (box->homogeneous)
 197                 {
 198                   if (nvis_children == 1)
 199                     child_width = width;
 200                   else
 201                     child_width = extra;
 202
 203                   nvis_children -= 1;
 204                   width -= extra;
 205                 }
 206               else
 207                 {
 208                   GtkRequisition child_requisition;
 209
 210                   gtk_widget_get_child_requisition (child->widget, &child_requisition);
 211
 212                   child_width = child_requisition.width + child->padding * 2;
 213
 214                   if (child->expand)
 215                     {
 216                       if (nexpand_children == 1)
 217                         child_width += width;
 218                       else
 219                         child_width += extra;
 220
 221                       nexpand_children -= 1;
 222                       width -= extra;
 223                     }
 224                 }
 225
 226               if (child->fill)
 227                 {
 228                   child_allocation.width = MAX (1, (gint) child_width - (gint) child->padding * 2);
 229                   child_allocation.x = x + child->padding;
 230                 }
 231               else
 232                 {
 233                   GtkRequisition child_requisition;
 234
 235                   gtk_widget_get_child_requisition (child->widget, &child_requisition);
 236                   child_allocation.width = child_requisition.width;
 237                   child_allocation.x = x + (child_width - child_allocation.width) / 2;
 238                 }
 239
 240               if (direction == GTK_TEXT_DIR_RTL)
 241                 child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
 242
 243               gtk_widget_size_allocate (child->widget, &child_allocation);
 244
 245               x += child_width + box->spacing;
 246             }
 247         }
 248
 249       x = allocation->x + allocation->width - GTK_CONTAINER (box)->border_width;
 250
 251       children = box->children;
 252       while (children)
 253         {
 254           child = children->data;
 255           children = children->next;
 256
 257           if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
 258             {
 259               GtkRequisition child_requisition;
 260               gtk_widget_get_child_requisition (child->widget, &child_requisition);
 261
 262               if (box->homogeneous)
 263                 {
 264                   if (nvis_children == 1)
 265                     child_width = width;
 266                   else
 267                     child_width = extra;
 268
 269                   nvis_children -= 1;
 270                   width -= extra;
 271                 }
 272               else
 273                 {
 274                   child_width = child_requisition.width + child->padding * 2;
 275
 276                   if (child->expand)
 277                     {
 278                       if (nexpand_children == 1)
 279                         child_width += width;
 280                       else
 281                         child_width += extra;
 282
 283                       nexpand_children -= 1;
 284                       width -= extra;
 285                     }
 286                 }
 287
 288               if (child->fill)
 289                 {
 290                   child_allocation.width = MAX (1, (gint)child_width - (gint)child->padding * 2);
 291                   child_allocation.x = x + child->padding - child_width;
 292                 }
 293               else
 294                 {
 295                   child_allocation.width = child_requisition.width;
 296                   child_allocation.x = x + (child_width - child_allocation.width) / 2 - child_width;
 297                 }
 298
 299               if (direction == GTK_TEXT_DIR_RTL)
 300                 child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
 301
 302               gtk_widget_size_allocate (child->widget, &child_allocation);
 303
 304               x -= (child_width + box->spacing);
 305             }
 306         }
 307     }
 308 }
 309
 310 #define __GTK_HBOX_C__
 311 #include "gtkaliasdef.c"