src/ui/gui/psppire-hbuttonbox.c

   1 /* PSPPIRE - a graphical user interface for PSPP.
   2    Copyright (C) 2007, 2010  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 "psppire-hbuttonbox.h"
  23 #include "psppire-dialog.h"
  24
  25 #include <gettext.h>
  26
  27 #define _(msgid) gettext (msgid)
  28 #define N_(msgid) msgid
  29
  30
  31 static void psppire_hbuttonbox_class_init          (PsppireHButtonBoxClass *);
  32 static void psppire_hbuttonbox_init                (PsppireHButtonBox      *);
  33
  34 static void gtk_hbutton_box_size_request  (GtkWidget      *widget,
  35                                            GtkRequisition *requisition);
  36 static void gtk_hbutton_box_size_allocate (GtkWidget      *widget,
  37                                            GtkAllocation  *allocation);
  38
  39
  40 static const GtkButtonBoxStyle default_layout_style = GTK_BUTTONBOX_EDGE;
  41
  42 GType
  43 psppire_hbutton_box_get_type (void)
  44 {
  45   static GType hbuttonbox_type = 0;
  46
  47   if (!hbuttonbox_type)
  48     {
  49       static const GTypeInfo hbuttonbox_info =
  50       {
  51         sizeof (PsppireHButtonBoxClass),
  52         NULL, /* base_init */
  53         NULL, /* base_finalize */
  54         (GClassInitFunc) psppire_hbuttonbox_class_init,
  55         NULL, /* class_finalize */
  56         NULL, /* class_data */
  57         sizeof (PsppireHButtonBox),
  58         0,
  59         (GInstanceInitFunc) psppire_hbuttonbox_init,
  60       };
  61
  62       hbuttonbox_type = g_type_register_static (PSPPIRE_BUTTONBOX_TYPE,
  63                                             "PsppireHButtonBox", &hbuttonbox_info, 0);
  64     }
  65
  66   return hbuttonbox_type;
  67 }
  68
  69 static void
  70 psppire_hbuttonbox_class_init (PsppireHButtonBoxClass *class)
  71 {
  72   GtkWidgetClass *widget_class;
  73
  74   widget_class = (GtkWidgetClass*) class;
  75
  76   widget_class->size_request = gtk_hbutton_box_size_request;
  77   widget_class->size_allocate = gtk_hbutton_box_size_allocate;
  78 }
  79
  80
  81 static void
  82 psppire_hbuttonbox_init (PsppireHButtonBox *hbuttonbox)
  83 {
  84 }
  85
  86
  87 GtkWidget*
  88 psppire_hbuttonbox_new (void)
  89 {
  90   PsppireHButtonBox *hbuttonbox ;
  91
  92   hbuttonbox = g_object_new (psppire_hbutton_box_get_type (), NULL);
  93
  94   return GTK_WIDGET (hbuttonbox) ;
  95 }
  96
  97
  98
  99 /* The following two functions are lifted verbatim from
 100    the Gtk2.10.6 library */
 101
 102 static void
 103 gtk_hbutton_box_size_request (GtkWidget      *widget,
 104                               GtkRequisition *requisition)
 105 {
 106   GtkBox *box;
 107   GtkButtonBox *bbox;
 108   gint nvis_children;
 109   gint child_width;
 110   gint child_height;
 111   gint spacing;
 112   GtkButtonBoxStyle layout;
 113
 114   box = GTK_BOX (widget);
 115   bbox = GTK_BUTTON_BOX (widget);
 116
 117   spacing = box->spacing;
 118   layout = bbox->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 119           ? bbox->layout_style : default_layout_style;
 120
 121   _psppire_button_box_child_requisition (widget,
 122                                      &nvis_children,
 123                                      NULL,
 124                                      &child_width,
 125                                      &child_height);
 126
 127   if (nvis_children == 0)
 128   {
 129     requisition->width = 0;
 130     requisition->height = 0;
 131   }
 132   else
 133   {
 134     switch (layout)
 135     {
 136     case GTK_BUTTONBOX_SPREAD:
 137       requisition->width =
 138               nvis_children*child_width + ((nvis_children+1)*spacing);
 139       break;
 140     case GTK_BUTTONBOX_EDGE:
 141     case GTK_BUTTONBOX_START:
 142     case GTK_BUTTONBOX_END:
 143       requisition->width = nvis_children*child_width + ((nvis_children-1)*spacing);
 144       break;
 145     default:
 146       g_assert_not_reached();
 147       break;
 148     }
 149
 150     requisition->height = child_height;
 151   }
 152
 153   requisition->width += GTK_CONTAINER (box)->border_width * 2;
 154   requisition->height += GTK_CONTAINER (box)->border_width * 2;
 155 }
 156
 157
 158
 159 static void
 160 gtk_hbutton_box_size_allocate (GtkWidget     *widget,
 161                                GtkAllocation *allocation)
 162 {
 163   GtkBox *base_box;
 164   GtkButtonBox *box;
 165   GtkBoxChild *child;
 166   GList *children;
 167   GtkAllocation child_allocation;
 168   gint nvis_children;
 169   gint n_secondaries;
 170   gint child_width;
 171   gint child_height;
 172   gint x = 0;
 173   gint secondary_x = 0;
 174   gint y = 0;
 175   gint width;
 176   gint childspace;
 177   gint childspacing = 0;
 178   GtkButtonBoxStyle layout;
 179   gint spacing;
 180
 181   base_box = GTK_BOX (widget);
 182   box = GTK_BUTTON_BOX (widget);
 183   spacing = base_box->spacing;
 184   layout = box->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE
 185           ? box->layout_style : default_layout_style;
 186   _psppire_button_box_child_requisition (widget,
 187                                      &nvis_children,
 188                                      &n_secondaries,
 189                                      &child_width,
 190                                      &child_height);
 191   widget->allocation = *allocation;
 192   width = allocation->width - GTK_CONTAINER (box)->border_width*2;
 193   switch (layout)
 194   {
 195   case GTK_BUTTONBOX_SPREAD:
 196     childspacing = (width - (nvis_children * child_width)) / (nvis_children + 1);
 197     x = allocation->x + GTK_CONTAINER (box)->border_width + childspacing;
 198     secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 199     break;
 200   case GTK_BUTTONBOX_EDGE:
 201     if (nvis_children >= 2)
 202       {
 203         childspacing = (width - (nvis_children * child_width)) / (nvis_children - 1);
 204         x = allocation->x + GTK_CONTAINER (box)->border_width;
 205         secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 206       }
 207     else
 208       {
 209         /* one or zero children, just center */
 210         childspacing = width;
 211         x = secondary_x = allocation->x + (allocation->width - child_width) / 2;
 212       }
 213     break;
 214   case GTK_BUTTONBOX_START:
 215     childspacing = spacing;
 216     x = allocation->x + GTK_CONTAINER (box)->border_width;
 217     secondary_x = allocation->x + allocation->width
 218       - child_width * n_secondaries
 219       - spacing * (n_secondaries - 1)
 220       - GTK_CONTAINER (box)->border_width;
 221     break;
 222   case GTK_BUTTONBOX_END:
 223     childspacing = spacing;
 224     x = allocation->x + allocation->width
 225       - child_width * (nvis_children - n_secondaries)
 226       - spacing * (nvis_children - n_secondaries - 1)
 227       - GTK_CONTAINER (box)->border_width;
 228     secondary_x = allocation->x + GTK_CONTAINER (box)->border_width;
 229     break;
 230   default:
 231     g_assert_not_reached();
 232     break;
 233   }
 234
 235
 236   y = allocation->y + (allocation->height - child_height) / 2;
 237   childspace = child_width + childspacing;
 238
 239   children = GTK_BOX (box)->children;
 240
 241   while (children)
 242     {
 243       child = children->data;
 244       children = children->next;
 245
 246       if (GTK_WIDGET_VISIBLE (child->widget))
 247         {
 248           child_allocation.width = child_width;
 249           child_allocation.height = child_height;
 250           child_allocation.y = y;
 251
 252           if (child->is_secondary)
 253             {
 254               child_allocation.x = secondary_x;
 255               secondary_x += childspace;
 256             }
 257           else
 258             {
 259               child_allocation.x = x;
 260               x += childspace;
 261             }
 262
 263           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 264             child_allocation.x = (allocation->x + allocation->width) - (child_allocation.x + child_width - allocation->x);
 265
 266           gtk_widget_size_allocate (child->widget, &child_allocation);
 267         }
 268     }
 269 }