src/ui/gui/psppire-hbuttonbox.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-hbuttonbox.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_hbuttonbox_class_init          (PsppireHButtonBoxClass *);
  35 static void psppire_hbuttonbox_init                (PsppireHButtonBox      *);
  36
  37 static void gtk_hbutton_box_size_request  (GtkWidget      *widget,
  38                                            GtkRequisition *requisition);
  39 static void gtk_hbutton_box_size_allocate (GtkWidget      *widget,
  40                                            GtkAllocation  *allocation);
  41
  42
  43 static const GtkButtonBoxStyle default_layout_style = GTK_BUTTONBOX_EDGE;
  44
  45 GType
  46 psppire_hbutton_box_get_type (void)
  47 {
  48   static GType hbuttonbox_type = 0;
  49
  50   if (!hbuttonbox_type)
  51     {
  52       static const GTypeInfo hbuttonbox_info =
  53       {
  54         sizeof (PsppireHButtonBoxClass),
  55         NULL, /* base_init */
  56         NULL, /* base_finalize */
  57         (GClassInitFunc) psppire_hbuttonbox_class_init,
  58         NULL, /* class_finalize */
  59         NULL, /* class_data */
  60         sizeof (PsppireHButtonBox),
  61         0,
  62         (GInstanceInitFunc) psppire_hbuttonbox_init,
  63       };
  64
  65       hbuttonbox_type = g_type_register_static (PSPPIRE_BUTTONBOX_TYPE,
  66                                             "PsppireHButtonBox", &hbuttonbox_info, 0);
  67     }
  68
  69   return hbuttonbox_type;
  70 }
  71
  72 static void
  73 psppire_hbuttonbox_class_init (PsppireHButtonBoxClass *class)
  74 {
  75   GtkWidgetClass *widget_class;
  76
  77   widget_class = (GtkWidgetClass*) class;
  78
  79   widget_class->size_request = gtk_hbutton_box_size_request;
  80   widget_class->size_allocate = gtk_hbutton_box_size_allocate;
  81 }
  82
  83
  84 static void
  85 psppire_hbuttonbox_init (PsppireHButtonBox *hbuttonbox)
  86 {
  87 }
  88
  89
  90 GtkWidget*
  91 psppire_hbuttonbox_new (void)
  92 {
  93   PsppireHButtonBox *hbuttonbox ;
  94
  95   hbuttonbox = g_object_new (psppire_hbutton_box_get_type (), NULL);
  96
  97   return GTK_WIDGET (hbuttonbox) ;
  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_hbutton_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->width =
 141               nvis_children*child_width + ((nvis_children+1)*spacing);
 142       break;
 143     case GTK_BUTTONBOX_EDGE:
 144     case GTK_BUTTONBOX_START:
 145     case GTK_BUTTONBOX_END:
 146       requisition->width = nvis_children*child_width + ((nvis_children-1)*spacing);
 147       break;
 148     default:
 149       g_assert_not_reached();
 150       break;
 151     }
 152
 153     requisition->height = child_height;
 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_hbutton_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 secondary_x = 0;
 177   gint y = 0;
 178   gint width;
 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   width = allocation->width - GTK_CONTAINER (box)->border_width*2;
 196   switch (layout)
 197   {
 198   case GTK_BUTTONBOX_SPREAD:
 199     childspacing = (width - (nvis_children * child_width)) / (nvis_children + 1);
 200     x = allocation->x + GTK_CONTAINER (box)->border_width + childspacing;
 201     secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 202     break;
 203   case GTK_BUTTONBOX_EDGE:
 204     if (nvis_children >= 2)
 205       {
 206         childspacing = (width - (nvis_children * child_width)) / (nvis_children - 1);
 207         x = allocation->x + GTK_CONTAINER (box)->border_width;
 208         secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing));
 209       }
 210     else
 211       {
 212         /* one or zero children, just center */
 213         childspacing = width;
 214         x = secondary_x = allocation->x + (allocation->width - child_width) / 2;
 215       }
 216     break;
 217   case GTK_BUTTONBOX_START:
 218     childspacing = spacing;
 219     x = allocation->x + GTK_CONTAINER (box)->border_width;
 220     secondary_x = allocation->x + allocation->width
 221       - child_width * n_secondaries
 222       - spacing * (n_secondaries - 1)
 223       - GTK_CONTAINER (box)->border_width;
 224     break;
 225   case GTK_BUTTONBOX_END:
 226     childspacing = spacing;
 227     x = allocation->x + allocation->width
 228       - child_width * (nvis_children - n_secondaries)
 229       - spacing * (nvis_children - n_secondaries - 1)
 230       - GTK_CONTAINER (box)->border_width;
 231     secondary_x = allocation->x + GTK_CONTAINER (box)->border_width;
 232     break;
 233   default:
 234     g_assert_not_reached();
 235     break;
 236   }
 237
 238
 239   y = allocation->y + (allocation->height - child_height) / 2;
 240   childspace = child_width + childspacing;
 241
 242   children = GTK_BOX (box)->children;
 243
 244   while (children)
 245     {
 246       child = children->data;
 247       children = children->next;
 248
 249       if (GTK_WIDGET_VISIBLE (child->widget))
 250         {
 251           child_allocation.width = child_width;
 252           child_allocation.height = child_height;
 253           child_allocation.y = y;
 254
 255           if (child->is_secondary)
 256             {
 257               child_allocation.x = secondary_x;
 258               secondary_x += childspace;
 259             }
 260           else
 261             {
 262               child_allocation.x = x;
 263               x += childspace;
 264             }
 265
 266           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 267             child_allocation.x = (allocation->x + allocation->width) - (child_allocation.x + child_width - allocation->x);
 268
 269           gtk_widget_size_allocate (child->widget, &child_allocation);
 270         }
 271     }
 272 }