src/ui/gui/psppire-hbuttonbox.c

   1 /*
   2     PSPPIRE --- A Graphical User Interface for PSPP
   3     Copyright (C) 2007  Free Software Foundation
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18     02110-1301, USA. */
  19
  20
  21 #include <config.h>
  22
  23 #include <glib.h>
  24 #include <gtk/gtk.h>
  25 #include <gtk/gtksignal.h>
  26 #include "psppire-hbuttonbox.h"
  27 #include "psppire-dialog.h"
  28
  29 #include <gtk/gtkbbox.h>
  30
  31 #include <gettext.h>
  32
  33 #define _(msgid) gettext (msgid)
  34 #define N_(msgid) msgid
  35
  36
  37 static void psppire_hbuttonbox_class_init          (PsppireHButtonBoxClass *);
  38 static void psppire_hbuttonbox_init                (PsppireHButtonBox      *);
  39
  40 static void gtk_hbutton_box_size_request  (GtkWidget      *widget,
  41                                            GtkRequisition *requisition);
  42 static void gtk_hbutton_box_size_allocate (GtkWidget      *widget,
  43                                            GtkAllocation  *allocation);
  44
  45
  46 static GtkButtonBoxStyle default_layout_style = GTK_BUTTONBOX_EDGE;
  47
  48 GType
  49 psppire_hbutton_box_get_type (void)
  50 {
  51   static GType hbuttonbox_type = 0;
  52
  53   if (!hbuttonbox_type)
  54     {
  55       static const GTypeInfo hbuttonbox_info =
  56       {
  57         sizeof (PsppireHButtonBoxClass),
  58         NULL, /* base_init */
  59         NULL, /* base_finalize */
  60         (GClassInitFunc) psppire_hbuttonbox_class_init,
  61         NULL, /* class_finalize */
  62         NULL, /* class_data */
  63         sizeof (PsppireHButtonBox),
  64         0,
  65         (GInstanceInitFunc) psppire_hbuttonbox_init,
  66       };
  67
  68       hbuttonbox_type = g_type_register_static (PSPPIRE_BUTTONBOX_TYPE,
  69                                             "PsppireHButtonBox", &hbuttonbox_info, 0);
  70     }
  71
  72   return hbuttonbox_type;
  73 }
  74
  75 static void
  76 psppire_hbuttonbox_class_init (PsppireHButtonBoxClass *class)
  77 {
  78   GtkWidgetClass *widget_class;
  79
  80   widget_class = (GtkWidgetClass*) class;
  81
  82   widget_class->size_request = gtk_hbutton_box_size_request;
  83   widget_class->size_allocate = gtk_hbutton_box_size_allocate;
  84 }
  85
  86
  87 static void
  88 psppire_hbuttonbox_init (PsppireHButtonBox *hbuttonbox)
  89 {
  90 }
  91
  92
  93 GtkWidget*
  94 psppire_hbuttonbox_new (void)
  95 {
  96   PsppireHButtonBox *hbuttonbox ;
  97
  98   hbuttonbox = g_object_new (psppire_hbutton_box_get_type (), NULL);
  99
 100   return GTK_WIDGET (hbuttonbox) ;
 101 }
 102
 103
 104
 105 /* The following two functions are lifted verbatim from
 106    the Gtk2.10.6 library */
 107
 108 static void
 109 gtk_hbutton_box_size_request (GtkWidget      *widget,
 110                               GtkRequisition *requisition)
 111 {
 112   GtkBox *box;
 113   GtkButtonBox *bbox;
 114   gint nvis_children;
 115   gint child_width;
 116   gint child_height;
 117   gint spacing;
 118   GtkButtonBoxStyle layout;
 119
 120   box = GTK_BOX (widget);
 121   bbox = GTK_BUTTON_BOX (widget);
 122
 123   spacing = box->spacing;
 124   layout = bbox->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 125           ? bbox->layout_style : default_layout_style;
 126
 127   _psppire_button_box_child_requisition (widget,
 128                                      &nvis_children,
 129                                      NULL,
 130                                      &child_width,
 131                                      &child_height);
 132
 133   if (nvis_children == 0)
 134   {
 135     requisition->width = 0;
 136     requisition->height = 0;
 137   }
 138   else
 139   {
 140     switch (layout)
 141     {
 142     case GTK_BUTTONBOX_SPREAD:
 143       requisition->width =
 144               nvis_children*child_width + ((nvis_children+1)*spacing);
 145       break;
 146     case GTK_BUTTONBOX_EDGE:
 147     case GTK_BUTTONBOX_START:
 148     case GTK_BUTTONBOX_END:
 149       requisition->width = nvis_children*child_width + ((nvis_children-1)*spacing);
 150       break;
 151     default:
 152       g_assert_not_reached();
 153       break;
 154     }
 155
 156     requisition->height = child_height;
 157   }
 158
 159   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 160   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 161 }
 162
 163
 164
 165 static void
 166 gtk_hbutton_box_size_allocate (GtkWidget     *widget,
 167                                GtkAllocation *allocation)
 168 {
 169   GtkBox *base_box;
 170   GtkButtonBox *box;
 171   GtkBoxChild *child;
 172   GList *children;
 173   GtkAllocation child_allocation;
 174   gint nvis_children;
 175   gint n_secondaries;
 176   gint child_width;
 177   gint child_height;
 178   gint x = 0;
 179   gint secondary_x = 0;
 180   gint y = 0;
 181   gint width;
 182   gint childspace;
 183   gint childspacing = 0;
 184   GtkButtonBoxStyle layout;
 185   gint spacing;
 186
 187   base_box = GTK_BOX (widget);
 188   box = GTK_BUTTON_BOX (widget);
 189   spacing = base_box->spacing;
 190   layout = box->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 191           ? box->layout_style : default_layout_style;
 192   _psppire_button_box_child_requisition (widget,
 193                                      &nvis_children,
 194                                      &n_secondaries,
 195                                      &child_width,
 196                                      &child_height);
 197   widget->allocation = *allocation;
 198   width = allocation->width - GTK_CONTAINER (box)->border_width*2;
 199   switch (layout)
 200   {
 201   case GTK_BUTTONBOX_SPREAD:
 202     childspacing = (width - (nvis_children * child_width)) / (nvis_children + 1);
 203     x = allocation->x + GTK_CONTAINER (box)->border_width + childspacing;
 204     secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 205     break;
 206   case GTK_BUTTONBOX_EDGE:
 207     if (nvis_children >= 2)
 208       {
 209         childspacing = (width - (nvis_children * child_width)) / (nvis_children - 1);
 210         x = allocation->x + GTK_CONTAINER (box)->border_width;
 211         secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 212       }
 213     else
 214       {
 215         /* one or zero children, just center */
 216         childspacing = width;
 217         x = secondary_x = allocation->x + (allocation->width - child_width) / 2;
 218       }
 219     break;
 220   case GTK_BUTTONBOX_START:
 221     childspacing = spacing;
 222     x = allocation->x + GTK_CONTAINER (box)->border_width;
 223     secondary_x = allocation->x + allocation->width
 224       - child_width * n_secondaries
 225       - spacing * (n_secondaries - 1)
 226       - GTK_CONTAINER (box)->border_width;
 227     break;
 228   case GTK_BUTTONBOX_END:
 229     childspacing = spacing;
 230     x = allocation->x + allocation->width
 231       - child_width * (nvis_children - n_secondaries)
 232       - spacing * (nvis_children - n_secondaries - 1)
 233       - GTK_CONTAINER (box)->border_width;
 234     secondary_x = allocation->x + GTK_CONTAINER (box)->border_width;
 235     break;
 236   default:
 237     g_assert_not_reached();
 238     break;
 239   }
 240
 241
 242   y = allocation->y + (allocation->height - child_height) / 2;
 243   childspace = child_width + childspacing;
 244
 245   children = GTK_BOX (box)->children;
 246
 247   while (children)
 248     {
 249       child = children->data;
 250       children = children->next;
 251
 252       if (GTK_WIDGET_VISIBLE (child->widget))
 253         {
 254           child_allocation.width = child_width;
 255           child_allocation.height = child_height;
 256           child_allocation.y = y;
 257
 258           if (child->is_secondary)
 259             {
 260               child_allocation.x = secondary_x;
 261               secondary_x += childspace;
 262             }
 263           else
 264             {
 265               child_allocation.x = x;
 266               x += childspace;
 267             }
 268
 269           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 270             child_allocation.x = (allocation->x + allocation->width) - (child_allocation.x + child_width - allocation->x);
 271
 272           gtk_widget_size_allocate (child->widget, &child_allocation);
 273         }
 274     }
 275 }