Pileus Git - ~andy/gtk/blob - gtk/gtkvbox.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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #include "gtkvbox.h"
  20
  21
  22 static void gtk_vbox_class_init    (GtkVBoxClass   *klass);
  23 static void gtk_vbox_init          (GtkVBox        *box);
  24 static void gtk_vbox_size_request  (GtkWidget      *widget,
  25                                     GtkRequisition *requisition);
  26 static void gtk_vbox_size_allocate (GtkWidget      *widget,
  27                                     GtkAllocation  *allocation);
  28
  29
  30 guint
  31 gtk_vbox_get_type ()
  32 {
  33   static guint vbox_type = 0;
  34
  35   if (!vbox_type)
  36     {
  37       GtkTypeInfo vbox_info =
  38       {
  39         "GtkVBox",
  40         sizeof (GtkVBox),
  41         sizeof (GtkVBoxClass),
  42         (GtkClassInitFunc) gtk_vbox_class_init,
  43         (GtkObjectInitFunc) gtk_vbox_init,
  44         (GtkArgSetFunc) NULL,
  45         (GtkArgGetFunc) NULL,
  46       };
  47
  48       vbox_type = gtk_type_unique (gtk_box_get_type (), &vbox_info);
  49     }
  50
  51   return vbox_type;
  52 }
  53
  54 static void
  55 gtk_vbox_class_init (GtkVBoxClass *class)
  56 {
  57   GtkWidgetClass *widget_class;
  58
  59   widget_class = (GtkWidgetClass*) class;
  60
  61   widget_class->size_request = gtk_vbox_size_request;
  62   widget_class->size_allocate = gtk_vbox_size_allocate;
  63 }
  64
  65 static void
  66 gtk_vbox_init (GtkVBox *vbox)
  67 {
  68 }
  69
  70 GtkWidget*
  71 gtk_vbox_new (gint homogeneous,
  72               gint spacing)
  73 {
  74   GtkVBox *vbox;
  75
  76   vbox = gtk_type_new (gtk_vbox_get_type ());
  77
  78   GTK_BOX (vbox)->spacing = spacing;
  79   GTK_BOX (vbox)->homogeneous = homogeneous ? TRUE : FALSE;
  80
  81   return GTK_WIDGET (vbox);
  82 }
  83
  84
  85 static void
  86 gtk_vbox_size_request (GtkWidget      *widget,
  87                        GtkRequisition *requisition)
  88 {
  89   GtkBox *box;
  90   GtkBoxChild *child;
  91   GList *children;
  92   gint nvis_children;
  93   gint height;
  94
  95   g_return_if_fail (widget != NULL);
  96   g_return_if_fail (GTK_IS_VBOX (widget));
  97   g_return_if_fail (requisition != NULL);
  98
  99   box = GTK_BOX (widget);
 100   requisition->width = 0;
 101   requisition->height = 0;
 102   nvis_children = 0;
 103
 104   children = box->children;
 105   while (children)
 106     {
 107       child = children->data;
 108       children = children->next;
 109
 110       if (GTK_WIDGET_VISIBLE (child->widget))
 111         {
 112           gtk_widget_size_request (child->widget, &child->widget->requisition);
 113
 114           if (box->homogeneous)
 115             {
 116               height = child->widget->requisition.height + child->padding * 2;
 117               requisition->height = MAX (requisition->height, height);
 118             }
 119           else
 120             {
 121               requisition->height += child->widget->requisition.height + child->padding * 2;
 122             }
 123
 124           requisition->width = MAX (requisition->width, child->widget->requisition.width);
 125
 126           nvis_children += 1;
 127         }
 128     }
 129
 130   if (nvis_children > 0)
 131     {
 132       if (box->homogeneous)
 133         requisition->height *= nvis_children;
 134       requisition->height += (nvis_children - 1) * box->spacing;
 135     }
 136
 137   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 138   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 139 }
 140
 141 static void
 142 gtk_vbox_size_allocate (GtkWidget     *widget,
 143                         GtkAllocation *allocation)
 144 {
 145   GtkBox *box;
 146   GtkBoxChild *child;
 147   GList *children;
 148   GtkAllocation child_allocation;
 149   gint nvis_children;
 150   gint nexpand_children;
 151   gint child_height;
 152   gint height;
 153   gint extra;
 154   gint y;
 155
 156   g_return_if_fail (widget != NULL);
 157   g_return_if_fail (GTK_IS_VBOX (widget));
 158   g_return_if_fail (allocation != NULL);
 159
 160   box = GTK_BOX (widget);
 161   widget->allocation = *allocation;
 162
 163   nvis_children = 0;
 164   nexpand_children = 0;
 165   children = box->children;
 166
 167   while (children)
 168     {
 169       child = children->data;
 170       children = children->next;
 171
 172       if (GTK_WIDGET_VISIBLE (child->widget))
 173         {
 174           nvis_children += 1;
 175           if (child->expand)
 176             nexpand_children += 1;
 177         }
 178     }
 179
 180   if (nvis_children > 0)
 181     {
 182       if (box->homogeneous)
 183         {
 184           height = (allocation->height -
 185                    GTK_CONTAINER (box)->border_width * 2 -
 186                    (nvis_children - 1) * box->spacing);
 187           extra = height / nvis_children;
 188         }
 189       else if (nexpand_children > 0)
 190         {
 191           height = (gint)allocation->height - (gint)widget->requisition.height;
 192           extra = height / nexpand_children;
 193         }
 194       else
 195         {
 196           height = 0;
 197           extra = 0;
 198         }
 199
 200       y = allocation->y + GTK_CONTAINER (box)->border_width;
 201       child_allocation.x = allocation->x + GTK_CONTAINER (box)->border_width;
 202       child_allocation.width = MAX (1, allocation->width - GTK_CONTAINER (box)->border_width * 2);
 203
 204       children = box->children;
 205       while (children)
 206         {
 207           child = children->data;
 208           children = children->next;
 209
 210           if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
 211             {
 212               if (box->homogeneous)
 213                 {
 214                   if (nvis_children == 1)
 215                     child_height = height;
 216                   else
 217                     child_height = extra;
 218
 219                   nvis_children -= 1;
 220                   height -= extra;
 221                 }
 222               else
 223                 {
 224                   child_height = child->widget->requisition.height + child->padding * 2;
 225
 226                   if (child->expand)
 227                     {
 228                       if (nexpand_children == 1)
 229                         child_height += height;
 230                       else
 231                         child_height += extra;
 232
 233                       nexpand_children -= 1;
 234                       height -= extra;
 235                     }
 236                 }
 237
 238               if (child->fill)
 239                 {
 240                   child_allocation.height = MAX (1, child_height - child->padding * 2);
 241                   child_allocation.y = y + child->padding;
 242                 }
 243               else
 244                 {
 245                   child_allocation.height = child->widget->requisition.height;
 246                   child_allocation.y = y + (child_height - child_allocation.height) / 2;
 247                 }
 248
 249               gtk_widget_size_allocate (child->widget, &child_allocation);
 250
 251               y += child_height + box->spacing;
 252             }
 253         }
 254
 255       y = allocation->y + allocation->height - GTK_CONTAINER (box)->border_width;
 256
 257       children = box->children;
 258       while (children)
 259         {
 260           child = children->data;
 261           children = children->next;
 262
 263           if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
 264             {
 265               if (box->homogeneous)
 266                 {
 267                   if (nvis_children == 1)
 268                     child_height = height;
 269                   else
 270                     child_height = extra;
 271
 272                   nvis_children -= 1;
 273                   height -= extra;
 274                 }
 275               else
 276                 {
 277                   child_height = child->widget->requisition.height + child->padding * 2;
 278
 279                   if (child->expand)
 280                     {
 281                       if (nexpand_children == 1)
 282                         child_height += height;
 283                       else
 284                         child_height += extra;
 285
 286                       nexpand_children -= 1;
 287                       height -= extra;
 288                     }
 289                 }
 290
 291               if (child->fill)
 292                 {
 293                   child_allocation.height = MAX (1, child_height - child->padding * 2);
 294                   child_allocation.y = y + child->padding - child_height;
 295                 }
 296               else
 297                 {
 298                   child_allocation.height = child->widget->requisition.height;
 299                   child_allocation.y = y + (child_height - child_allocation.height) / 2 - child_height;
 300                 }
 301
 302               gtk_widget_size_allocate (child->widget, &child_allocation);
 303
 304               y -= (child_height + box->spacing);
 305             }
 306         }
 307     }
 308 }