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 "gtkalias.h"
  30
  31
  32 static void gtk_hbox_class_init    (GtkHBoxClass   *klass);
  33 static void gtk_hbox_init          (GtkHBox        *box);
  34 static void gtk_hbox_size_request  (GtkWidget      *widget,
  35                                     GtkRequisition *requisition);
  36 static void gtk_hbox_size_allocate (GtkWidget      *widget,
  37                                     GtkAllocation  *allocation);
  38
  39
  40 GType
  41 gtk_hbox_get_type (void)
  42 {
  43   static GType hbox_type = 0;
  44
  45   if (!hbox_type)
  46     {
  47       static const GTypeInfo hbox_info =
  48       {
  49         sizeof (GtkHBoxClass),
  50         NULL,           /* base_init */
  51         NULL,           /* base_finalize */
  52         (GClassInitFunc) gtk_hbox_class_init,
  53         NULL,           /* class_finalize */
  54         NULL,           /* class_data */
  55         sizeof (GtkHBox),
  56         0,              /* n_preallocs */
  57         (GInstanceInitFunc) gtk_hbox_init,
  58       };
  59
  60       hbox_type = g_type_register_static (GTK_TYPE_BOX, g_intern_static_string ("GtkHBox"),
  61                                           &hbox_info, 0);
  62     }
  63
  64   return hbox_type;
  65 }
  66
  67 static void
  68 gtk_hbox_class_init (GtkHBoxClass *class)
  69 {
  70   GtkWidgetClass *widget_class;
  71
  72   widget_class = (GtkWidgetClass*) class;
  73
  74   widget_class->size_request = gtk_hbox_size_request;
  75   widget_class->size_allocate = gtk_hbox_size_allocate;
  76 }
  77
  78 static void
  79 gtk_hbox_init (GtkHBox *hbox)
  80 {
  81 }
  82
  83 GtkWidget*
  84 gtk_hbox_new (gboolean homogeneous,
  85               gint spacing)
  86 {
  87   GtkHBox *hbox;
  88
  89   hbox = g_object_new (GTK_TYPE_HBOX, NULL);
  90
  91   GTK_BOX (hbox)->spacing = spacing;
  92   GTK_BOX (hbox)->homogeneous = homogeneous ? TRUE : FALSE;
  93
  94   return GTK_WIDGET (hbox);
  95 }
  96
  97
  98 static void
  99 gtk_hbox_size_request (GtkWidget      *widget,
 100                        GtkRequisition *requisition)
 101 {
 102   GtkBox *box;
 103   GtkBoxChild *child;
 104   GList *children;
 105   gint nvis_children;
 106   gint width;
 107
 108   box = GTK_BOX (widget);
 109   requisition->width = 0;
 110   requisition->height = 0;
 111   nvis_children = 0;
 112
 113   children = box->children;
 114   while (children)
 115     {
 116       child = children->data;
 117       children = children->next;
 118
 119       if (GTK_WIDGET_VISIBLE (child->widget))
 120         {
 121           GtkRequisition child_requisition;
 122
 123           gtk_widget_size_request (child->widget, &child_requisition);
 124
 125           if (box->homogeneous)
 126             {
 127               width = child_requisition.width + child->padding * 2;
 128               requisition->width = MAX (requisition->width, width);
 129             }
 130           else
 131             {
 132               requisition->width += child_requisition.width + child->padding * 2;
 133             }
 134
 135           requisition->height = MAX (requisition->height, child_requisition.height);
 136
 137           nvis_children += 1;
 138         }
 139     }
 140
 141   if (nvis_children > 0)
 142     {
 143       if (box->homogeneous)
 144         requisition->width *= nvis_children;
 145       requisition->width += (nvis_children - 1) * box->spacing;
 146     }
 147
 148   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 149   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 150 }
 151
 152 static void
 153 gtk_hbox_size_allocate (GtkWidget     *widget,
 154                         GtkAllocation *allocation)
 155 {
 156   GtkBox *box;
 157   GtkBoxChild *child;
 158   GList *children;
 159   GtkAllocation child_allocation;
 160   gint nvis_children;
 161   gint nexpand_children;
 162   gint child_width;
 163   gint width;
 164   gint extra;
 165   gint x;
 166   GtkTextDirection direction;
 167
 168   box = GTK_BOX (widget);
 169   widget->allocation = *allocation;
 170
 171   direction = gtk_widget_get_direction (widget);
 172
 173   nvis_children = 0;
 174   nexpand_children = 0;
 175   children = box->children;
 176
 177   while (children)
 178     {
 179       child = children->data;
 180       children = children->next;
 181
 182       if (GTK_WIDGET_VISIBLE (child->widget))
 183         {
 184           nvis_children += 1;
 185           if (child->expand)
 186             nexpand_children += 1;
 187         }
 188     }
 189
 190   if (nvis_children > 0)
 191     {
 192       if (box->homogeneous)
 193         {
 194           width = (allocation->width -
 195                    GTK_CONTAINER (box)->border_width * 2 -
 196                    (nvis_children - 1) * box->spacing);
 197           extra = width / nvis_children;
 198         }
 199       else if (nexpand_children > 0)
 200         {
 201           width = (gint) allocation->width - (gint) widget->requisition.width;
 202           extra = width / nexpand_children;
 203         }
 204       else
 205         {
 206           width = 0;
 207           extra = 0;
 208         }
 209
 210       x = allocation->x + GTK_CONTAINER (box)->border_width;
 211       child_allocation.y = allocation->y + GTK_CONTAINER (box)->border_width;
 212       child_allocation.height = MAX (1, (gint) allocation->height - (gint) GTK_CONTAINER (box)->border_width * 2);
 213
 214       children = box->children;
 215       while (children)
 216         {
 217           child = children->data;
 218           children = children->next;
 219
 220           if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
 221             {
 222               if (box->homogeneous)
 223                 {
 224                   if (nvis_children == 1)
 225                     child_width = width;
 226                   else
 227                     child_width = extra;
 228
 229                   nvis_children -= 1;
 230                   width -= extra;
 231                 }
 232               else
 233                 {
 234                   GtkRequisition child_requisition;
 235
 236                   gtk_widget_get_child_requisition (child->widget, &child_requisition);
 237
 238                   child_width = child_requisition.width + child->padding * 2;
 239
 240                   if (child->expand)
 241                     {
 242                       if (nexpand_children == 1)
 243                         child_width += width;
 244                       else
 245                         child_width += extra;
 246
 247                       nexpand_children -= 1;
 248                       width -= extra;
 249                     }
 250                 }
 251
 252               if (child->fill)
 253                 {
 254                   child_allocation.width = MAX (1, (gint) child_width - (gint) child->padding * 2);
 255                   child_allocation.x = x + child->padding;
 256                 }
 257               else
 258                 {
 259                   GtkRequisition child_requisition;
 260
 261                   gtk_widget_get_child_requisition (child->widget, &child_requisition);
 262                   child_allocation.width = child_requisition.width;
 263                   child_allocation.x = x + (child_width - child_allocation.width) / 2;
 264                 }
 265
 266               if (direction == GTK_TEXT_DIR_RTL)
 267                 child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
 268
 269               gtk_widget_size_allocate (child->widget, &child_allocation);
 270
 271               x += child_width + box->spacing;
 272             }
 273         }
 274
 275       x = allocation->x + allocation->width - GTK_CONTAINER (box)->border_width;
 276
 277       children = box->children;
 278       while (children)
 279         {
 280           child = children->data;
 281           children = children->next;
 282
 283           if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
 284             {
 285               GtkRequisition child_requisition;
 286               gtk_widget_get_child_requisition (child->widget, &child_requisition);
 287
 288               if (box->homogeneous)
 289                 {
 290                   if (nvis_children == 1)
 291                     child_width = width;
 292                   else
 293                     child_width = extra;
 294
 295                   nvis_children -= 1;
 296                   width -= extra;
 297                 }
 298               else
 299                 {
 300                   child_width = child_requisition.width + child->padding * 2;
 301
 302                   if (child->expand)
 303                     {
 304                       if (nexpand_children == 1)
 305                         child_width += width;
 306                       else
 307                         child_width += extra;
 308
 309                       nexpand_children -= 1;
 310                       width -= extra;
 311                     }
 312                 }
 313
 314               if (child->fill)
 315                 {
 316                   child_allocation.width = MAX (1, (gint)child_width - (gint)child->padding * 2);
 317                   child_allocation.x = x + child->padding - child_width;
 318                 }
 319               else
 320                 {
 321                   child_allocation.width = child_requisition.width;
 322                   child_allocation.x = x + (child_width - child_allocation.width) / 2 - child_width;
 323                 }
 324
 325               if (direction == GTK_TEXT_DIR_RTL)
 326                 child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
 327
 328               gtk_widget_size_allocate (child->widget, &child_allocation);
 329
 330               x -= (child_width + box->spacing);
 331             }
 332         }
 333     }
 334 }
 335
 336 #define __GTK_HBOX_C__
 337 #include "gtkaliasdef.c"