Pileus Git - ~andy/gtk/blob - gtk/gtkcheckbutton.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library 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 GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18 #include "gtkcheckbutton.h"
  19 #include "gtklabel.h"
  20
  21
  22 #define INDICATOR_SIZE     10
  23 #define INDICATOR_SPACING  2
  24
  25 #define CHECK_BUTTON_CLASS(w)  GTK_CHECK_BUTTON_CLASS (GTK_OBJECT (w)->klass)
  26
  27
  28 static void gtk_check_button_class_init          (GtkCheckButtonClass *klass);
  29 static void gtk_check_button_init                (GtkCheckButton      *check_button);
  30 static void gtk_check_button_draw                (GtkWidget           *widget,
  31                                                   GdkRectangle        *area);
  32 static void gtk_check_button_draw_focus          (GtkWidget           *widget);
  33 static void gtk_check_button_size_request        (GtkWidget           *widget,
  34                                                   GtkRequisition      *requisition);
  35 static void gtk_check_button_size_allocate       (GtkWidget           *widget,
  36                                                   GtkAllocation       *allocation);
  37 static gint gtk_check_button_expose              (GtkWidget           *widget,
  38                                                   GdkEventExpose      *event);
  39 static void gtk_check_button_draw_indicator      (GtkCheckButton      *check_button,
  40                                                   GdkRectangle        *area);
  41 static void gtk_real_check_button_draw_indicator (GtkCheckButton      *check_button,
  42                                                   GdkRectangle        *area);
  43
  44
  45 static GtkToggleButtonClass *parent_class = NULL;
  46
  47
  48 guint
  49 gtk_check_button_get_type ()
  50 {
  51   static guint check_button_type = 0;
  52
  53   if (!check_button_type)
  54     {
  55       GtkTypeInfo check_button_info =
  56       {
  57         "GtkCheckButton",
  58         sizeof (GtkCheckButton),
  59         sizeof (GtkCheckButtonClass),
  60         (GtkClassInitFunc) gtk_check_button_class_init,
  61         (GtkObjectInitFunc) gtk_check_button_init,
  62         (GtkArgSetFunc) NULL,
  63         (GtkArgGetFunc) NULL,
  64       };
  65
  66       check_button_type = gtk_type_unique (gtk_toggle_button_get_type (), &check_button_info);
  67     }
  68
  69   return check_button_type;
  70 }
  71
  72 static void
  73 gtk_check_button_class_init (GtkCheckButtonClass *class)
  74 {
  75   GtkWidgetClass *widget_class;
  76
  77   widget_class = (GtkWidgetClass*) class;
  78   parent_class = gtk_type_class (gtk_toggle_button_get_type ());
  79
  80   widget_class->draw = gtk_check_button_draw;
  81   widget_class->draw_focus = gtk_check_button_draw_focus;
  82   widget_class->size_request = gtk_check_button_size_request;
  83   widget_class->size_allocate = gtk_check_button_size_allocate;
  84   widget_class->expose_event = gtk_check_button_expose;
  85
  86   class->indicator_size = INDICATOR_SIZE;
  87   class->indicator_spacing = INDICATOR_SPACING;
  88   class->draw_indicator = gtk_real_check_button_draw_indicator;
  89 }
  90
  91 static void
  92 gtk_check_button_init (GtkCheckButton *check_button)
  93 {
  94   check_button->toggle_button.draw_indicator = TRUE;
  95 }
  96
  97 GtkWidget*
  98 gtk_check_button_new ()
  99 {
 100   return GTK_WIDGET (gtk_type_new (gtk_check_button_get_type ()));
 101 }
 102
 103
 104 GtkWidget*
 105 gtk_check_button_new_with_label (const gchar *label)
 106 {
 107   GtkWidget *check_button;
 108   GtkWidget *label_widget;
 109
 110   check_button = gtk_check_button_new ();
 111   label_widget = gtk_label_new (label);
 112   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 113
 114   gtk_container_add (GTK_CONTAINER (check_button), label_widget);
 115   gtk_widget_show (label_widget);
 116
 117   return check_button;
 118 }
 119
 120 static void
 121 gtk_check_button_draw (GtkWidget    *widget,
 122                        GdkRectangle *area)
 123 {
 124   GtkButton *button;
 125   GtkCheckButton *check_button;
 126   GdkRectangle child_area;
 127
 128   g_return_if_fail (widget != NULL);
 129   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 130   g_return_if_fail (area != NULL);
 131
 132   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
 133     {
 134       check_button = GTK_CHECK_BUTTON (widget);
 135
 136       if (check_button->toggle_button.draw_indicator)
 137         {
 138           button = GTK_BUTTON (widget);
 139
 140           gtk_check_button_draw_indicator (check_button, area);
 141
 142           if (button->child && GTK_WIDGET_NO_WINDOW (button->child) &&
 143               gtk_widget_intersect (button->child, area, &child_area))
 144             gtk_widget_draw (button->child, &child_area);
 145
 146           gtk_widget_draw_focus (widget);
 147         }
 148       else
 149         {
 150           if (GTK_WIDGET_CLASS (parent_class)->draw)
 151             (* GTK_WIDGET_CLASS (parent_class)->draw) (widget, area);
 152         }
 153     }
 154 }
 155
 156 static void
 157 gtk_check_button_draw_focus (GtkWidget *widget)
 158 {
 159   GtkCheckButton *check_button;
 160
 161   g_return_if_fail (widget != NULL);
 162   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 163
 164   if (GTK_WIDGET_DRAWABLE (widget))
 165     {
 166       check_button = GTK_CHECK_BUTTON (widget);
 167       if (check_button->toggle_button.draw_indicator)
 168         {
 169           gint border_width;
 170
 171           border_width = GTK_CONTAINER (widget)->border_width;
 172           if (GTK_WIDGET_HAS_FOCUS (widget))
 173             gdk_draw_rectangle (widget->window,
 174                                 widget->style->black_gc, FALSE,
 175                                 border_width, border_width,
 176                                 widget->allocation.width - 2 * border_width - 1,
 177                                 widget->allocation.height - 2 * border_width - 1);
 178           else
 179             gdk_draw_rectangle (widget->window,
 180                                 widget->style->bg_gc[GTK_STATE_NORMAL], FALSE,
 181                                 border_width, border_width,
 182                                 widget->allocation.width - 2 * border_width - 1,
 183                                 widget->allocation.height - 2 * border_width - 1);
 184         }
 185       else
 186         {
 187           if (GTK_WIDGET_CLASS (parent_class)->draw_focus)
 188             (* GTK_WIDGET_CLASS (parent_class)->draw_focus) (widget);
 189         }
 190     }
 191 }
 192
 193 static void
 194 gtk_check_button_size_request (GtkWidget      *widget,
 195                                GtkRequisition *requisition)
 196 {
 197   GtkCheckButton *check_button;
 198   GtkButton *button;
 199   gint temp;
 200
 201   g_return_if_fail (widget != NULL);
 202   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 203   g_return_if_fail (requisition != NULL);
 204
 205   check_button = GTK_CHECK_BUTTON (widget);
 206
 207   if (GTK_WIDGET_CLASS (parent_class)->size_request)
 208     (* GTK_WIDGET_CLASS (parent_class)->size_request) (widget, requisition);
 209
 210   if (check_button->toggle_button.draw_indicator)
 211     {
 212       button = GTK_BUTTON (widget);
 213
 214       requisition->width += (CHECK_BUTTON_CLASS (widget)->indicator_size +
 215                              CHECK_BUTTON_CLASS (widget)->indicator_spacing * 3 + 2);
 216
 217       temp = (CHECK_BUTTON_CLASS (widget)->indicator_size +
 218               CHECK_BUTTON_CLASS (widget)->indicator_spacing * 2);
 219       requisition->height = MAX (requisition->height, temp) + 2;
 220     }
 221 }
 222
 223 static void
 224 gtk_check_button_size_allocate (GtkWidget     *widget,
 225                                 GtkAllocation *allocation)
 226 {
 227   GtkCheckButton *check_button;
 228   GtkButton *button;
 229   GtkAllocation child_allocation;
 230
 231   g_return_if_fail (widget != NULL);
 232   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 233   g_return_if_fail (allocation != NULL);
 234
 235   check_button = GTK_CHECK_BUTTON (widget);
 236   if (check_button->toggle_button.draw_indicator)
 237     {
 238       widget->allocation = *allocation;
 239       if (GTK_WIDGET_REALIZED (widget))
 240         gdk_window_move_resize (widget->window,
 241                                 allocation->x, allocation->y,
 242                                 allocation->width, allocation->height);
 243
 244       button = GTK_BUTTON (widget);
 245
 246       if (button->child && GTK_WIDGET_VISIBLE (button->child))
 247         {
 248           child_allocation.x = (GTK_CONTAINER (widget)->border_width +
 249                                 CHECK_BUTTON_CLASS (widget)->indicator_size +
 250                                 CHECK_BUTTON_CLASS (widget)->indicator_spacing * 3 + 1);
 251           child_allocation.y = GTK_CONTAINER (widget)->border_width + 1;
 252           child_allocation.width = (allocation->width - child_allocation.x  -
 253                                     GTK_CONTAINER (widget)->border_width - 1);
 254           child_allocation.height = allocation->height - child_allocation.y * 2;
 255
 256           gtk_widget_size_allocate (button->child, &child_allocation);
 257         }
 258     }
 259   else
 260     {
 261       if (GTK_WIDGET_CLASS (parent_class)->size_allocate)
 262         (* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
 263     }
 264 }
 265
 266 static gint
 267 gtk_check_button_expose (GtkWidget      *widget,
 268                          GdkEventExpose *event)
 269 {
 270   GtkButton *button;
 271   GtkCheckButton *check_button;
 272   GdkEventExpose child_event;
 273
 274   g_return_val_if_fail (widget != NULL, FALSE);
 275   g_return_val_if_fail (GTK_IS_CHECK_BUTTON (widget), FALSE);
 276   g_return_val_if_fail (event != NULL, FALSE);
 277
 278   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
 279     {
 280       check_button = GTK_CHECK_BUTTON (widget);
 281
 282       if (check_button->toggle_button.draw_indicator)
 283         {
 284           button = GTK_BUTTON (widget);
 285
 286           gtk_check_button_draw_indicator (check_button, &event->area);
 287
 288           child_event = *event;
 289           if (button->child && GTK_WIDGET_NO_WINDOW (button->child) &&
 290               gtk_widget_intersect (button->child, &event->area, &child_event.area))
 291             gtk_widget_event (button->child, (GdkEvent*) &child_event);
 292
 293           gtk_widget_draw_focus (widget);
 294         }
 295       else
 296         {
 297           if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 298             (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 299         }
 300     }
 301
 302   return FALSE;
 303 }
 304
 305
 306 static void
 307 gtk_check_button_draw_indicator (GtkCheckButton *check_button,
 308                                  GdkRectangle   *area)
 309 {
 310   GtkCheckButtonClass *class;
 311
 312   g_return_if_fail (check_button != NULL);
 313   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 314   g_return_if_fail (CHECK_BUTTON_CLASS (check_button) != NULL);
 315
 316   class = CHECK_BUTTON_CLASS (check_button);
 317
 318   if (class->draw_indicator)
 319     (* class->draw_indicator) (check_button, area);
 320 }
 321
 322 static void
 323 gtk_real_check_button_draw_indicator (GtkCheckButton *check_button,
 324                                       GdkRectangle    *area)
 325 {
 326   GtkWidget *widget;
 327   GtkToggleButton *toggle_button;
 328   GtkStateType state_type;
 329   GtkShadowType shadow_type;
 330   GdkRectangle restrict_area;
 331   GdkRectangle new_area;
 332   gint width, height;
 333   gint x, y;
 334
 335   g_return_if_fail (check_button != NULL);
 336   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 337
 338   if (GTK_WIDGET_DRAWABLE (check_button))
 339     {
 340       widget = GTK_WIDGET (check_button);
 341       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 342
 343       state_type = GTK_WIDGET_STATE (widget);
 344       if ((state_type != GTK_STATE_NORMAL) &&
 345           (state_type != GTK_STATE_PRELIGHT))
 346         state_type = GTK_STATE_NORMAL;
 347
 348       restrict_area.x = GTK_CONTAINER (widget)->border_width;
 349       restrict_area.y = restrict_area.x;
 350       restrict_area.width = widget->allocation.width - restrict_area.x * 2;
 351       restrict_area.height = widget->allocation.height - restrict_area.x * 2;
 352
 353       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 354         {
 355           gtk_style_set_background (widget->style, widget->window, state_type);
 356           gdk_window_clear_area (widget->window, new_area.x, new_area.y,
 357                                  new_area.width, new_area.height);
 358         }
 359
 360       x = CHECK_BUTTON_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 361       y = (widget->allocation.height - CHECK_BUTTON_CLASS (widget)->indicator_size) / 2;
 362       width = CHECK_BUTTON_CLASS (widget)->indicator_size;
 363       height = CHECK_BUTTON_CLASS (widget)->indicator_size;
 364
 365       if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE)
 366         shadow_type = GTK_SHADOW_IN;
 367       else if ((GTK_WIDGET_STATE (widget) == GTK_STATE_PRELIGHT) && toggle_button->active)
 368         shadow_type = GTK_SHADOW_IN;
 369       else
 370         shadow_type = GTK_SHADOW_OUT;
 371
 372       gdk_draw_rectangle (widget->window,
 373                           widget->style->bg_gc[GTK_WIDGET_STATE (widget)],
 374                           TRUE, x + 1, y + 1, width, height);
 375       gtk_draw_shadow (widget->style, widget->window,
 376                        GTK_WIDGET_STATE (widget), shadow_type,
 377                        x + 1, y + 1, width, height);
 378     }
 379 }