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 Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtkcheckbutton.h"
  28 #include "gtklabel.h"
  29
  30
  31 #define INDICATOR_SIZE     10
  32 #define INDICATOR_SPACING  2
  33
  34
  35 static void gtk_check_button_class_init          (GtkCheckButtonClass *klass);
  36 static void gtk_check_button_init                (GtkCheckButton      *check_button);
  37 static void gtk_check_button_size_request        (GtkWidget           *widget,
  38                                                   GtkRequisition      *requisition);
  39 static void gtk_check_button_size_allocate       (GtkWidget           *widget,
  40                                                   GtkAllocation       *allocation);
  41 static gint gtk_check_button_expose              (GtkWidget           *widget,
  42                                                   GdkEventExpose      *event);
  43 static void gtk_check_button_paint               (GtkWidget           *widget,
  44                                                   GdkRectangle        *area);
  45 static void gtk_check_button_draw_indicator      (GtkCheckButton      *check_button,
  46                                                   GdkRectangle        *area);
  47 static void gtk_real_check_button_draw_indicator (GtkCheckButton      *check_button,
  48                                                   GdkRectangle        *area);
  49
  50 static GtkToggleButtonClass *parent_class = NULL;
  51
  52
  53 GtkType
  54 gtk_check_button_get_type (void)
  55 {
  56   static GtkType check_button_type = 0;
  57
  58   if (!check_button_type)
  59     {
  60       static const GtkTypeInfo check_button_info =
  61       {
  62         "GtkCheckButton",
  63         sizeof (GtkCheckButton),
  64         sizeof (GtkCheckButtonClass),
  65         (GtkClassInitFunc) gtk_check_button_class_init,
  66         (GtkObjectInitFunc) gtk_check_button_init,
  67         /* reserved_1 */ NULL,
  68         /* reserved_2 */ NULL,
  69         (GtkClassInitFunc) NULL,
  70       };
  71
  72       check_button_type = gtk_type_unique (GTK_TYPE_TOGGLE_BUTTON, &check_button_info);
  73     }
  74
  75   return check_button_type;
  76 }
  77
  78 static void
  79 gtk_check_button_class_init (GtkCheckButtonClass *class)
  80 {
  81   GtkWidgetClass *widget_class;
  82
  83   widget_class = (GtkWidgetClass*) class;
  84   parent_class = gtk_type_class (gtk_toggle_button_get_type ());
  85
  86   widget_class->size_request = gtk_check_button_size_request;
  87   widget_class->size_allocate = gtk_check_button_size_allocate;
  88   widget_class->expose_event = gtk_check_button_expose;
  89
  90   class->indicator_size = INDICATOR_SIZE;
  91   class->indicator_spacing = INDICATOR_SPACING;
  92   class->draw_indicator = gtk_real_check_button_draw_indicator;
  93 }
  94
  95 static void
  96 gtk_check_button_init (GtkCheckButton *check_button)
  97 {
  98   GTK_WIDGET_SET_FLAGS (check_button, GTK_NO_WINDOW);
  99   GTK_WIDGET_UNSET_FLAGS (check_button, GTK_RECEIVES_DEFAULT);
 100   GTK_TOGGLE_BUTTON (check_button)->draw_indicator = TRUE;
 101 }
 102
 103 GtkWidget*
 104 gtk_check_button_new (void)
 105 {
 106   return gtk_widget_new (GTK_TYPE_CHECK_BUTTON, NULL);
 107 }
 108
 109
 110 GtkWidget*
 111 gtk_check_button_new_with_label (const gchar *label)
 112 {
 113   GtkWidget *check_button;
 114   GtkWidget *label_widget;
 115
 116   check_button = gtk_check_button_new ();
 117   label_widget = gtk_label_new (label);
 118   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 119
 120   gtk_container_add (GTK_CONTAINER (check_button), label_widget);
 121   gtk_widget_show (label_widget);
 122
 123   return check_button;
 124 }
 125
 126 /**
 127  * gtk_check_button_new_with_mnemonic:
 128  * @label: The text of the button, with an underscore in front of the
 129  *         mnemonic character
 130  * @returns: a new #GtkCheckButton
 131  *
 132  * Creates a new #GtkCheckButton containing a label.
 133  * If characters in @label are preceded by an underscore, they are underlined
 134  * indicating that they represent a keyboard accelerator called a mnemonic.
 135  * Pressing Alt and that key activates the checkbutton.
 136  **/
 137 GtkWidget*
 138 gtk_check_button_new_with_mnemonic (const gchar *label)
 139 {
 140   GtkWidget *check_button;
 141   GtkWidget *label_widget;
 142
 143   check_button = gtk_check_button_new ();
 144   label_widget = gtk_label_new_with_mnemonic (label);
 145   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 146   gtk_label_set_mnemonic_widget (GTK_LABEL (label_widget), check_button);
 147
 148   gtk_container_add (GTK_CONTAINER (check_button), label_widget);
 149   gtk_widget_show (label_widget);
 150
 151   return check_button;
 152 }
 153
 154
 155 /* This should only be called when toggle_button->draw_indicator
 156  * is true.
 157  */
 158 static void
 159 gtk_check_button_paint (GtkWidget    *widget,
 160                         GdkRectangle *area)
 161 {
 162   GtkCheckButton *check_button;
 163
 164   g_return_if_fail (widget != NULL);
 165   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 166
 167   check_button = GTK_CHECK_BUTTON (widget);
 168
 169   if (GTK_WIDGET_DRAWABLE (widget))
 170     {
 171       gint border_width;
 172
 173       gtk_check_button_draw_indicator (check_button, area);
 174
 175       border_width = GTK_CONTAINER (widget)->border_width;
 176       if (GTK_WIDGET_HAS_FOCUS (widget))
 177         gtk_paint_focus (widget->style, widget->window,
 178                          NULL, widget, "checkbutton",
 179                          border_width + widget->allocation.x,
 180                          border_width + widget->allocation.y,
 181                          widget->allocation.width - 2 * border_width - 1,
 182                          widget->allocation.height - 2 * border_width - 1);
 183     }
 184 }
 185
 186 static void
 187 gtk_check_button_size_request (GtkWidget      *widget,
 188                                GtkRequisition *requisition)
 189 {
 190   GtkToggleButton *toggle_button;
 191   gint temp;
 192
 193   g_return_if_fail (widget != NULL);
 194   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 195   g_return_if_fail (requisition != NULL);
 196
 197   toggle_button = GTK_TOGGLE_BUTTON (widget);
 198
 199   if (GTK_WIDGET_CLASS (parent_class)->size_request)
 200     (* GTK_WIDGET_CLASS (parent_class)->size_request) (widget, requisition);
 201
 202   if (toggle_button->draw_indicator)
 203     {
 204       requisition->width += (GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size +
 205                              GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing * 3 + 2);
 206
 207       temp = (GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size +
 208               GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing * 2);
 209       requisition->height = MAX (requisition->height, temp) + 2;
 210     }
 211 }
 212
 213 static void
 214 gtk_check_button_size_allocate (GtkWidget     *widget,
 215                                 GtkAllocation *allocation)
 216 {
 217   GtkCheckButton *check_button;
 218   GtkToggleButton *toggle_button;
 219   GtkButton *button;
 220   GtkAllocation child_allocation;
 221
 222   g_return_if_fail (widget != NULL);
 223   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 224   g_return_if_fail (allocation != NULL);
 225
 226   check_button = GTK_CHECK_BUTTON (widget);
 227   toggle_button = GTK_TOGGLE_BUTTON (widget);
 228
 229   if (toggle_button->draw_indicator)
 230     {
 231       widget->allocation = *allocation;
 232       if (GTK_WIDGET_REALIZED (widget))
 233         gdk_window_move_resize (toggle_button->event_window,
 234                                 allocation->x, allocation->y,
 235                                 allocation->width, allocation->height);
 236
 237       button = GTK_BUTTON (widget);
 238
 239       if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 240         {
 241           child_allocation.x = (GTK_CONTAINER (widget)->border_width +
 242                                 GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size +
 243                                 GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing * 3 + 1 +
 244                                 widget->allocation.x);
 245           child_allocation.y = GTK_CONTAINER (widget)->border_width + 1 +
 246             widget->allocation.y;
 247           child_allocation.width = MAX (1, allocation->width -
 248                                         (GTK_CONTAINER (widget)->border_width +
 249                                          GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size +
 250                                          GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing * 3 + 1)  -
 251                                         GTK_CONTAINER (widget)->border_width - 1);
 252           child_allocation.height = MAX (1, allocation->height - (GTK_CONTAINER (widget)->border_width + 1) * 2);
 253
 254           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 255             child_allocation.x = allocation->x + allocation->width
 256               - (child_allocation.x - allocation->x + child_allocation.width);
 257
 258           gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
 259         }
 260     }
 261   else
 262     {
 263       if (GTK_WIDGET_CLASS (parent_class)->size_allocate)
 264         (* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
 265     }
 266 }
 267
 268 static gint
 269 gtk_check_button_expose (GtkWidget      *widget,
 270                          GdkEventExpose *event)
 271 {
 272   GtkCheckButton *check_button;
 273   GtkToggleButton *toggle_button;
 274   GtkBin *bin;
 275
 276   g_return_val_if_fail (widget != NULL, FALSE);
 277   g_return_val_if_fail (GTK_IS_CHECK_BUTTON (widget), FALSE);
 278   g_return_val_if_fail (event != NULL, FALSE);
 279
 280   check_button = GTK_CHECK_BUTTON (widget);
 281   toggle_button = GTK_TOGGLE_BUTTON (widget);
 282   bin = GTK_BIN (widget);
 283
 284   if (GTK_WIDGET_DRAWABLE (widget))
 285     {
 286       if (toggle_button->draw_indicator)
 287         {
 288           gtk_check_button_paint (widget, &event->area);
 289
 290           if (bin->child)
 291             gtk_container_propagate_expose (GTK_CONTAINER (widget),
 292                                             bin->child,
 293                                             event);
 294         }
 295       else if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 296         (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 297     }
 298
 299   return FALSE;
 300 }
 301
 302
 303 static void
 304 gtk_check_button_draw_indicator (GtkCheckButton *check_button,
 305                                  GdkRectangle   *area)
 306 {
 307   GtkCheckButtonClass *class;
 308
 309   g_return_if_fail (check_button != NULL);
 310   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 311
 312   class = GTK_CHECK_BUTTON_GET_CLASS (check_button);
 313
 314   if (class->draw_indicator)
 315     (* class->draw_indicator) (check_button, area);
 316 }
 317
 318 static void
 319 gtk_real_check_button_draw_indicator (GtkCheckButton *check_button,
 320                                       GdkRectangle   *area)
 321 {
 322   GtkWidget *widget;
 323   GtkToggleButton *toggle_button;
 324   GtkStateType state_type;
 325   GtkShadowType shadow_type;
 326   GdkRectangle restrict_area;
 327   GdkRectangle new_area;
 328   gint width, height;
 329   gint x, y;
 330   GdkWindow *window;
 331
 332   g_return_if_fail (check_button != NULL);
 333   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 334
 335   widget = GTK_WIDGET (check_button);
 336   toggle_button = GTK_TOGGLE_BUTTON (check_button);
 337
 338   if (GTK_WIDGET_DRAWABLE (check_button))
 339     {
 340       window = widget->window;
 341
 342       state_type = GTK_WIDGET_STATE (widget);
 343       if (state_type != GTK_STATE_NORMAL &&
 344           state_type != GTK_STATE_PRELIGHT)
 345         state_type = GTK_STATE_NORMAL;
 346
 347       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 348       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 349       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 350       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 351
 352       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 353         {
 354           if (state_type != GTK_STATE_NORMAL)
 355             gtk_paint_flat_box (widget->style, window, state_type,
 356                                 GTK_SHADOW_ETCHED_OUT,
 357                                 area, widget, "checkbutton",
 358                                 new_area.x, new_area.y,
 359                                 new_area.width, new_area.height);
 360         }
 361
 362       x = widget->allocation.x + GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 363       y = widget->allocation.y + (widget->allocation.height - GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size) / 2;
 364       width = GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size;
 365       height = GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size;
 366
 367       if (GTK_TOGGLE_BUTTON (widget)->inconsistent)
 368         {
 369           state_type = GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE ? GTK_STATE_NORMAL : GTK_WIDGET_STATE (widget);
 370           shadow_type = GTK_SHADOW_ETCHED_IN;
 371         }
 372       else if (GTK_TOGGLE_BUTTON (widget)->active)
 373         {
 374           state_type = GTK_STATE_ACTIVE;
 375           shadow_type = GTK_SHADOW_IN;
 376         }
 377       else
 378         {
 379           shadow_type = GTK_SHADOW_OUT;
 380           state_type = GTK_WIDGET_STATE (widget);
 381         }
 382
 383       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 384         x = widget->allocation.x + widget->allocation.width - (width + x - widget->allocation.x);
 385
 386       gtk_paint_check (widget->style, window,
 387                        state_type, shadow_type,
 388                        area, widget, "checkbutton",
 389                        x, y, width, height);
 390     }
 391 }