src/ui/gui/psppire-vbuttonbox.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-vbuttonbox.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_vbuttonbox_class_init          (PsppireVButtonBoxClass *);
  38 static void psppire_vbuttonbox_init                (PsppireVButtonBox      *);
  39
  40 static void gtk_vbutton_box_size_request  (GtkWidget      *widget,
  41                                            GtkRequisition *requisition);
  42 static void gtk_vbutton_box_size_allocate (GtkWidget      *widget,
  43                                            GtkAllocation  *allocation);
  44
  45
  46 static GtkButtonBoxStyle default_layout_style = GTK_BUTTONBOX_EDGE;
  47
  48 GType
  49 psppire_vbutton_box_get_type (void)
  50 {
  51   static GType vbuttonbox_type = 0;
  52
  53   if (!vbuttonbox_type)
  54     {
  55       static const GTypeInfo vbuttonbox_info =
  56       {
  57         sizeof (PsppireVButtonBoxClass),
  58         NULL, /* base_init */
  59         NULL, /* base_finalize */
  60         (GClassInitFunc) psppire_vbuttonbox_class_init,
  61         NULL, /* class_finalize */
  62         NULL, /* class_data */
  63         sizeof (PsppireVButtonBox),
  64         0,
  65         (GInstanceInitFunc) psppire_vbuttonbox_init,
  66       };
  67
  68       vbuttonbox_type = g_type_register_static (PSPPIRE_BUTTONBOX_TYPE,
  69                                             "PsppireVButtonBox", &vbuttonbox_info, 0);
  70     }
  71
  72   return vbuttonbox_type;
  73 }
  74
  75 static void
  76 psppire_vbuttonbox_class_init (PsppireVButtonBoxClass *class)
  77 {
  78   GtkWidgetClass *widget_class;
  79
  80   widget_class = (GtkWidgetClass*) class;
  81
  82   widget_class->size_request = gtk_vbutton_box_size_request;
  83   widget_class->size_allocate = gtk_vbutton_box_size_allocate;
  84 }
  85
  86
  87 static void
  88 psppire_vbuttonbox_init (PsppireVButtonBox *vbuttonbox)
  89 {
  90 }
  91
  92
  93 GtkWidget*
  94 psppire_vbuttonbox_new (void)
  95 {
  96   PsppireVButtonBox *vbuttonbox ;
  97
  98   vbuttonbox = g_object_new (psppire_vbutton_box_get_type (), NULL);
  99
 100   return GTK_WIDGET (vbuttonbox) ;
 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_vbutton_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->height =
 144                 nvis_children*child_height + ((nvis_children+1)*spacing);
 145         break;
 146       case GTK_BUTTONBOX_EDGE:
 147       case GTK_BUTTONBOX_START:
 148       case GTK_BUTTONBOX_END:
 149         requisition->height =
 150                 nvis_children*child_height + ((nvis_children-1)*spacing);
 151         break;
 152       default:
 153             g_assert_not_reached();
 154             break;
 155       }
 156       requisition->width = child_width;
 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_vbutton_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 y = 0;
 180   gint secondary_y = 0;
 181   gint height;
 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   height = allocation->height - GTK_CONTAINER (box)->border_width*2;
 199   switch (layout)
 200   {
 201   case GTK_BUTTONBOX_SPREAD:
 202     childspacing = (height - (nvis_children * child_height)) / (nvis_children + 1);
 203     y = allocation->y + GTK_CONTAINER (box)->border_width + childspacing;
 204     secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing));
 205     break;
 206   case GTK_BUTTONBOX_EDGE:
 207     if (nvis_children >= 2)
 208       {
 209         childspacing = (height - (nvis_children*child_height)) / (nvis_children-1);
 210         y = allocation->y + GTK_CONTAINER (box)->border_width;
 211         secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing));
 212       }
 213     else
 214       {
 215         /* one or zero children, just center */
 216         childspacing = height;
 217         y = secondary_y = allocation->y + (allocation->height - child_height) / 2;
 218       }
 219     break;
 220   case GTK_BUTTONBOX_START:
 221     childspacing = spacing;
 222     y = allocation->y + GTK_CONTAINER (box)->border_width;
 223     secondary_y = allocation->y + allocation->height
 224       - child_height * n_secondaries
 225       - spacing * (n_secondaries - 1)
 226       - GTK_CONTAINER (box)->border_width;
 227     break;
 228   case GTK_BUTTONBOX_END:
 229     childspacing = spacing;
 230     y = allocation->y + allocation->height
 231       - child_height * (nvis_children - n_secondaries)
 232       - spacing * (nvis_children - n_secondaries - 1)
 233       - GTK_CONTAINER (box)->border_width;
 234     secondary_y = allocation->y + GTK_CONTAINER (box)->border_width;
 235     break;
 236   default:
 237     g_assert_not_reached();
 238     break;
 239   }
 240
 241   x = allocation->x + (allocation->width - child_width) / 2;
 242   childspace = child_height + childspacing;
 243
 244   children = GTK_BOX (box)->children;
 245
 246   while (children)
 247     {
 248       child = children->data;
 249       children = children->next;
 250
 251       if (GTK_WIDGET_VISIBLE (child->widget))
 252         {
 253           child_allocation.width = child_width;
 254           child_allocation.height = child_height;
 255           child_allocation.x = x;
 256
 257           if (child->is_secondary)
 258             {
 259               child_allocation.y = secondary_y;
 260               secondary_y += childspace;
 261             }
 262           else
 263             {
 264               child_allocation.y = y;
 265               y += childspace;
 266             }
 267
 268           gtk_widget_size_allocate (child->widget, &child_allocation);
 269         }
 270     }
 271 }
 272