Pileus Git - ~andy/gtk/blob - gtk/gtkbbox.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 "gtkbbox.h"
  28 #include "gtkintl.h"
  29
  30
  31 static void gtk_button_box_class_init    (GtkButtonBoxClass   *klass);
  32 static void gtk_button_box_init          (GtkButtonBox        *box);
  33
  34 #define DEFAULT_CHILD_MIN_WIDTH 85
  35 #define DEFAULT_CHILD_MIN_HEIGHT 27
  36 #define DEFAULT_CHILD_IPAD_X 7
  37 #define DEFAULT_CHILD_IPAD_Y 0
  38
  39 GtkType
  40 gtk_button_box_get_type (void)
  41 {
  42   static GtkType button_box_type = 0;
  43
  44   if (!button_box_type)
  45     {
  46       static const GtkTypeInfo button_box_info =
  47       {
  48         "GtkButtonBox",
  49         sizeof (GtkButtonBox),
  50         sizeof (GtkButtonBoxClass),
  51         (GtkClassInitFunc) gtk_button_box_class_init,
  52         (GtkObjectInitFunc) gtk_button_box_init,
  53         /* reserved_1 */ NULL,
  54         /* reserved_2 */ NULL,
  55         (GtkClassInitFunc) NULL,
  56       };
  57
  58       button_box_type = gtk_type_unique (gtk_box_get_type (), &button_box_info);
  59     }
  60
  61   return button_box_type;
  62 }
  63
  64 static void
  65 gtk_button_box_class_init (GtkButtonBoxClass *class)
  66 {
  67   GtkWidgetClass *widget_class;
  68
  69   widget_class = (GtkWidgetClass*) class;
  70
  71   /* FIXME we need to override the "spacing" property on GtkBox once
  72    * libgobject allows that.
  73    */
  74
  75   gtk_widget_class_install_style_property (widget_class,
  76                                            g_param_spec_int ("child_min_width",
  77                                                              _("Minimum child width"),
  78                                                              _("Minimum width of buttons inside the box"),
  79                                                              0,
  80                                                              G_MAXINT,
  81                                                              DEFAULT_CHILD_MIN_WIDTH,
  82                                                              G_PARAM_READABLE));
  83
  84   gtk_widget_class_install_style_property (widget_class,
  85                                            g_param_spec_int ("child_min_height",
  86                                                              _("Minimum child height"),
  87                                                              _("Minimum height of buttons inside the box"),
  88                                                              0,
  89                                                              G_MAXINT,
  90                                                              DEFAULT_CHILD_MIN_HEIGHT,
  91                                                              G_PARAM_READABLE));
  92
  93   gtk_widget_class_install_style_property (widget_class,
  94                                            g_param_spec_int ("child_internal_pad_x",
  95                                                              _("Child internal width padding"),
  96                                                              _("Amount to increase child's size on either side"),
  97                                                              0,
  98                                                              G_MAXINT,
  99                                                              DEFAULT_CHILD_IPAD_X,
 100                                                              G_PARAM_READABLE));
 101
 102   gtk_widget_class_install_style_property (widget_class,
 103                                            g_param_spec_int ("child_internal_pad_y",
 104                                                              _("Child internal height padding"),
 105                                                              _("Amount to increase child's size on the top and bottom"),
 106                                                              0,
 107                                                              G_MAXINT,
 108                                                              DEFAULT_CHILD_IPAD_Y,
 109                                                              G_PARAM_READABLE));
 110 }
 111
 112 static void
 113 gtk_button_box_init (GtkButtonBox *button_box)
 114 {
 115   GTK_BOX (button_box)->spacing = 0;
 116   button_box->child_min_width = GTK_BUTTONBOX_DEFAULT;
 117   button_box->child_min_height = GTK_BUTTONBOX_DEFAULT;
 118   button_box->child_ipad_x = GTK_BUTTONBOX_DEFAULT;
 119   button_box->child_ipad_y = GTK_BUTTONBOX_DEFAULT;
 120   button_box->layout_style = GTK_BUTTONBOX_DEFAULT_STYLE;
 121 }
 122
 123 /* set per widget values for spacing, child size and child internal padding */
 124
 125 void gtk_button_box_set_child_size (GtkButtonBox *widget, gint width, gint height)
 126 {
 127   widget->child_min_width = width;
 128   widget->child_min_height = height;
 129 }
 130
 131 void gtk_button_box_set_child_ipadding (GtkButtonBox *widget,
 132                                         gint ipad_x, gint ipad_y)
 133 {
 134   widget->child_ipad_x = ipad_x;
 135   widget->child_ipad_y = ipad_y;
 136 }
 137
 138 void gtk_button_box_set_layout (GtkButtonBox *widget,
 139                                 GtkButtonBoxStyle layout_style)
 140 {
 141   g_return_if_fail (layout_style >= GTK_BUTTONBOX_DEFAULT_STYLE &&
 142                     layout_style <= GTK_BUTTONBOX_END);
 143
 144   widget->layout_style = layout_style;
 145 }
 146
 147
 148 /* get per widget values for spacing, child size and child internal padding */
 149
 150 void gtk_button_box_get_child_size (GtkButtonBox *widget,
 151                                      gint *width, gint *height)
 152 {
 153   *width  = widget->child_min_width;
 154   *height = widget->child_min_height;
 155 }
 156
 157 void gtk_button_box_get_child_ipadding (GtkButtonBox *widget,
 158                                          gint* ipad_x, gint *ipad_y)
 159 {
 160   *ipad_x = widget->child_ipad_x;
 161   *ipad_y = widget->child_ipad_y;
 162 }
 163
 164 GtkButtonBoxStyle gtk_button_box_get_layout (GtkButtonBox *widget)
 165 {
 166   return widget->layout_style;
 167 }
 168
 169
 170
 171 /* Ask children how much space they require and round up
 172    to match minimum size and internal padding.
 173    Returns the size each single child should have. */
 174 void
 175 _gtk_button_box_child_requisition (GtkWidget *widget,
 176                                    int *nvis_children,
 177                                    int *width,
 178                                    int *height)
 179 {
 180   GtkButtonBox *bbox;
 181   GtkBoxChild *child;
 182   GList *children;
 183   gint nchildren;
 184   gint needed_width;
 185   gint needed_height;
 186   GtkRequisition child_requisition;
 187   gint ipad_w;
 188   gint ipad_h;
 189   gint width_default;
 190   gint height_default;
 191   gint ipad_x_default;
 192   gint ipad_y_default;
 193
 194   gint child_min_width;
 195   gint child_min_height;
 196   gint ipad_x;
 197   gint ipad_y;
 198
 199   g_return_if_fail (widget != NULL);
 200   g_return_if_fail (GTK_IS_BUTTON_BOX (widget));
 201
 202   bbox = GTK_BUTTON_BOX (widget);
 203
 204   gtk_widget_style_get (widget,
 205                         "child_min_width",
 206                         &width_default,
 207                         "child_min_height",
 208                         &height_default,
 209                         "child_internal_pad_x",
 210                         &ipad_x_default,
 211                         "child_internal_pad_y",
 212                         &ipad_y_default, NULL);
 213
 214   child_min_width = bbox->child_min_width   != GTK_BUTTONBOX_DEFAULT
 215           ? bbox->child_min_width : width_default;
 216   child_min_height = bbox->child_min_height !=GTK_BUTTONBOX_DEFAULT
 217           ? bbox->child_min_height : height_default;
 218   ipad_x = bbox->child_ipad_x != GTK_BUTTONBOX_DEFAULT
 219           ? bbox->child_ipad_x : ipad_x_default;
 220   ipad_y = bbox->child_ipad_y != GTK_BUTTONBOX_DEFAULT
 221           ? bbox->child_ipad_y : ipad_y_default;
 222
 223   nchildren = 0;
 224   children = GTK_BOX(bbox)->children;
 225   needed_width = child_min_width;
 226   needed_height = child_min_height;
 227   ipad_w = ipad_x * 2;
 228   ipad_h = ipad_y * 2;
 229
 230   while (children)
 231     {
 232       child = children->data;
 233       children = children->next;
 234
 235       if (GTK_WIDGET_VISIBLE (child->widget))
 236         {
 237           nchildren += 1;
 238           gtk_widget_size_request (child->widget, &child_requisition);
 239           if (child_requisition.width + ipad_w > needed_width)
 240                   needed_width = child_requisition.width + ipad_w;
 241           if (child_requisition.height + ipad_h > needed_height)
 242                   needed_height = child_requisition.height + ipad_h;
 243         }
 244     }
 245
 246   *nvis_children = nchildren;
 247   *width = needed_width;
 248   *height = needed_height;
 249 }