src/ui/gui/psppire-vbuttonbox.c

   1 /* PSPPIRE - a graphical user interface for PSPP.
   2    Copyright (C) 2007  Free Software Foundation
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  16
  17
  18 #include <config.h>
  19
  20 #include <glib.h>
  21 #include <gtk/gtk.h>
  22 #include <gtk/gtksignal.h>
  23 #include "psppire-vbuttonbox.h"
  24 #include "psppire-dialog.h"
  25
  26 #include <gtk/gtkbbox.h>
  27
  28 #include <gettext.h>
  29
  30 #define _(msgid) gettext (msgid)
  31 #define N_(msgid) msgid
  32
  33
  34 static void psppire_vbuttonbox_class_init          (PsppireVButtonBoxClass *);
  35 static void psppire_vbuttonbox_init                (PsppireVButtonBox      *);
  36
  37 static void gtk_vbutton_box_size_request  (GtkWidget      *widget,
  38                                            GtkRequisition *requisition);
  39 static void gtk_vbutton_box_size_allocate (GtkWidget      *widget,
  40                                            GtkAllocation  *allocation);
  41
  42
  43 static GtkButtonBoxStyle default_layout_style = GTK_BUTTONBOX_EDGE;
  44
  45 GType
  46 psppire_vbutton_box_get_type (void)
  47 {
  48   static GType vbuttonbox_type = 0;
  49
  50   if (!vbuttonbox_type)
  51     {
  52       static const GTypeInfo vbuttonbox_info =
  53       {
  54         sizeof (PsppireVButtonBoxClass),
  55         NULL, /* base_init */
  56         NULL, /* base_finalize */
  57         (GClassInitFunc) psppire_vbuttonbox_class_init,
  58         NULL, /* class_finalize */
  59         NULL, /* class_data */
  60         sizeof (PsppireVButtonBox),
  61         0,
  62         (GInstanceInitFunc) psppire_vbuttonbox_init,
  63       };
  64
  65       vbuttonbox_type = g_type_register_static (PSPPIRE_BUTTONBOX_TYPE,
  66                                             "PsppireVButtonBox", &vbuttonbox_info, 0);
  67     }
  68
  69   return vbuttonbox_type;
  70 }
  71
  72 static void
  73 psppire_vbuttonbox_class_init (PsppireVButtonBoxClass *class)
  74 {
  75   GtkWidgetClass *widget_class;
  76
  77   widget_class = (GtkWidgetClass*) class;
  78
  79   widget_class->size_request = gtk_vbutton_box_size_request;
  80   widget_class->size_allocate = gtk_vbutton_box_size_allocate;
  81 }
  82
  83
  84 static void
  85 psppire_vbuttonbox_init (PsppireVButtonBox *vbuttonbox)
  86 {
  87 }
  88
  89
  90 GtkWidget*
  91 psppire_vbuttonbox_new (void)
  92 {
  93   PsppireVButtonBox *vbuttonbox ;
  94
  95   vbuttonbox = g_object_new (psppire_vbutton_box_get_type (), NULL);
  96
  97   return GTK_WIDGET (vbuttonbox) ;
  98 }
  99
 100
 101
 102 /* The following two functions are lifted verbatim from
 103    the Gtk2.10.6 library */
 104
 105 static void
 106 gtk_vbutton_box_size_request (GtkWidget      *widget,
 107                               GtkRequisition *requisition)
 108 {
 109   GtkBox *box;
 110   GtkButtonBox *bbox;
 111   gint nvis_children;
 112   gint child_width;
 113   gint child_height;
 114   gint spacing;
 115   GtkButtonBoxStyle layout;
 116
 117   box = GTK_BOX (widget);
 118   bbox = GTK_BUTTON_BOX (widget);
 119
 120   spacing = box->spacing;
 121   layout = bbox->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 122           ? bbox->layout_style : default_layout_style;
 123
 124   _psppire_button_box_child_requisition (widget,
 125                                          &nvis_children,
 126                                          NULL,
 127                                          &child_width,
 128                                          &child_height);
 129
 130   if (nvis_children == 0)
 131     {
 132       requisition->width = 0;
 133       requisition->height = 0;
 134     }
 135   else
 136     {
 137       switch (layout)
 138       {
 139       case GTK_BUTTONBOX_SPREAD:
 140         requisition->height =
 141                 nvis_children*child_height + ((nvis_children+1)*spacing);
 142         break;
 143       case GTK_BUTTONBOX_EDGE:
 144       case GTK_BUTTONBOX_START:
 145       case GTK_BUTTONBOX_END:
 146         requisition->height =
 147                 nvis_children*child_height + ((nvis_children-1)*spacing);
 148         break;
 149       default:
 150             g_assert_not_reached();
 151             break;
 152       }
 153       requisition->width = child_width;
 154     }
 155
 156   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 157   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 158 }
 159
 160
 161
 162 static void
 163 gtk_vbutton_box_size_allocate (GtkWidget     *widget,
 164                                GtkAllocation *allocation)
 165 {
 166   GtkBox *base_box;
 167   GtkButtonBox *box;
 168   GtkBoxChild *child;
 169   GList *children;
 170   GtkAllocation child_allocation;
 171   gint nvis_children;
 172   gint n_secondaries;
 173   gint child_width;
 174   gint child_height;
 175   gint x = 0;
 176   gint y = 0;
 177   gint secondary_y = 0;
 178   gint height;
 179   gint childspace;
 180   gint childspacing = 0;
 181   GtkButtonBoxStyle layout;
 182   gint spacing;
 183
 184   base_box = GTK_BOX (widget);
 185   box = GTK_BUTTON_BOX (widget);
 186   spacing = base_box->spacing;
 187   layout = box->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 188           ? box->layout_style : default_layout_style;
 189   _psppire_button_box_child_requisition (widget,
 190                                      &nvis_children,
 191                                      &n_secondaries,
 192                                      &child_width,
 193                                      &child_height);
 194   widget->allocation = *allocation;
 195   height = allocation->height - GTK_CONTAINER (box)->border_width*2;
 196   switch (layout)
 197   {
 198   case GTK_BUTTONBOX_SPREAD:
 199     childspacing = (height - (nvis_children * child_height)) / (nvis_children + 1);
 200     y = allocation->y + GTK_CONTAINER (box)->border_width + childspacing;
 201     secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing));
 202     break;
 203   case GTK_BUTTONBOX_EDGE:
 204     if (nvis_children >= 2)
 205       {
 206         childspacing = (height - (nvis_children*child_height)) / (nvis_children-1);
 207         y = allocation->y + GTK_CONTAINER (box)->border_width;
 208         secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing));
 209       }
 210     else
 211       {
 212         /* one or zero children, just center */
 213         childspacing = height;
 214         y = secondary_y = allocation->y + (allocation->height - child_height) / 2;
 215       }
 216     break;
 217   case GTK_BUTTONBOX_START:
 218     childspacing = spacing;
 219     y = allocation->y + GTK_CONTAINER (box)->border_width;
 220     secondary_y = allocation->y + allocation->height
 221       - child_height * n_secondaries
 222       - spacing * (n_secondaries - 1)
 223       - GTK_CONTAINER (box)->border_width;
 224     break;
 225   case GTK_BUTTONBOX_END:
 226     childspacing = spacing;
 227     y = allocation->y + allocation->height
 228       - child_height * (nvis_children - n_secondaries)
 229       - spacing * (nvis_children - n_secondaries - 1)
 230       - GTK_CONTAINER (box)->border_width;
 231     secondary_y = allocation->y + GTK_CONTAINER (box)->border_width;
 232     break;
 233   default:
 234     g_assert_not_reached();
 235     break;
 236   }
 237
 238   x = allocation->x + (allocation->width - child_width) / 2;
 239   childspace = child_height + childspacing;
 240
 241   children = GTK_BOX (box)->children;
 242
 243   while (children)
 244     {
 245       child = children->data;
 246       children = children->next;
 247
 248       if (GTK_WIDGET_VISIBLE (child->widget))
 249         {
 250           child_allocation.width = child_width;
 251           child_allocation.height = child_height;
 252           child_allocation.x = x;
 253
 254           if (child->is_secondary)
 255             {
 256               child_allocation.y = secondary_y;
 257               secondary_y += childspace;
 258             }
 259           else
 260             {
 261               child_allocation.y = y;
 262               y += childspace;
 263             }
 264
 265           gtk_widget_size_allocate (child->widget, &child_allocation);
 266         }
 267     }
 268 }
 269