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 "config.h"
  28
  29 #include "gtkcheckbutton.h"
  30
  31 #include "gtkbuttonprivate.h"
  32 #include "gtklabel.h"
  33
  34 #include "gtkprivate.h"
  35 #include "gtkintl.h"
  36
  37
  38 #define INDICATOR_SIZE     13
  39 #define INDICATOR_SPACING  2
  40
  41
  42 static void gtk_check_button_get_preferred_width  (GtkWidget          *widget,
  43                                                    gint               *minimum,
  44                                                    gint               *natural);
  45 static void gtk_check_button_get_preferred_height (GtkWidget          *widget,
  46                                                    gint               *minimum,
  47                                                    gint               *natural);
  48 static void gtk_check_button_size_allocate       (GtkWidget           *widget,
  49                                                   GtkAllocation       *allocation);
  50 static gboolean gtk_check_button_draw            (GtkWidget           *widget,
  51                                                   cairo_t             *cr);
  52 static void gtk_check_button_paint               (GtkWidget           *widget,
  53                                                   cairo_t             *cr);
  54 static void gtk_check_button_draw_indicator      (GtkCheckButton      *check_button,
  55                                                   cairo_t             *cr);
  56 static void gtk_real_check_button_draw_indicator (GtkCheckButton      *check_button,
  57                                                   cairo_t             *cr);
  58
  59 G_DEFINE_TYPE (GtkCheckButton, gtk_check_button, GTK_TYPE_TOGGLE_BUTTON)
  60
  61 static void
  62 gtk_check_button_class_init (GtkCheckButtonClass *class)
  63 {
  64   GtkWidgetClass *widget_class;
  65
  66   widget_class = (GtkWidgetClass*) class;
  67
  68   widget_class->get_preferred_width = gtk_check_button_get_preferred_width;
  69   widget_class->get_preferred_height = gtk_check_button_get_preferred_height;
  70   widget_class->size_allocate = gtk_check_button_size_allocate;
  71   widget_class->draw = gtk_check_button_draw;
  72
  73   class->draw_indicator = gtk_real_check_button_draw_indicator;
  74
  75   gtk_widget_class_install_style_property (widget_class,
  76                                            g_param_spec_int ("indicator-size",
  77                                                              P_("Indicator Size"),
  78                                                              P_("Size of check or radio indicator"),
  79                                                              0,
  80                                                              G_MAXINT,
  81                                                              INDICATOR_SIZE,
  82                                                              GTK_PARAM_READABLE));
  83   gtk_widget_class_install_style_property (widget_class,
  84                                            g_param_spec_int ("indicator-spacing",
  85                                                              P_("Indicator Spacing"),
  86                                                              P_("Spacing around check or radio indicator"),
  87                                                              0,
  88                                                              G_MAXINT,
  89                                                              INDICATOR_SPACING,
  90                                                              GTK_PARAM_READABLE));
  91 }
  92
  93 static void
  94 gtk_check_button_init (GtkCheckButton *check_button)
  95 {
  96   GtkStyleContext *context;
  97
  98   gtk_widget_set_has_window (GTK_WIDGET (check_button), FALSE);
  99   gtk_widget_set_receives_default (GTK_WIDGET (check_button), FALSE);
 100   gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (check_button), TRUE);
 101
 102   /* Remove the "button" class added in GtkButton constructor,
 103    * since this widget implementation doesn't look like a button
 104    * at all.
 105    */
 106   context = gtk_widget_get_style_context (GTK_WIDGET (check_button));
 107   gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BUTTON);
 108 }
 109
 110 GtkWidget*
 111 gtk_check_button_new (void)
 112 {
 113   return g_object_new (GTK_TYPE_CHECK_BUTTON, NULL);
 114 }
 115
 116
 117 GtkWidget*
 118 gtk_check_button_new_with_label (const gchar *label)
 119 {
 120   return g_object_new (GTK_TYPE_CHECK_BUTTON, "label", label, NULL);
 121 }
 122
 123 /**
 124  * gtk_check_button_new_with_mnemonic:
 125  * @label: The text of the button, with an underscore in front of the
 126  *         mnemonic character
 127  * @returns: a new #GtkCheckButton
 128  *
 129  * Creates a new #GtkCheckButton containing a label. The label
 130  * will be created using gtk_label_new_with_mnemonic(), so underscores
 131  * in @label indicate the mnemonic for the check button.
 132  **/
 133 GtkWidget*
 134 gtk_check_button_new_with_mnemonic (const gchar *label)
 135 {
 136   return g_object_new (GTK_TYPE_CHECK_BUTTON,
 137                        "label", label,
 138                        "use-underline", TRUE,
 139                        NULL);
 140 }
 141
 142
 143 /* This should only be called when toggle_button->draw_indicator
 144  * is true.
 145  */
 146 static void
 147 gtk_check_button_paint (GtkWidget    *widget,
 148                         cairo_t      *cr)
 149 {
 150   GtkCheckButton *check_button = GTK_CHECK_BUTTON (widget);
 151   gint border_width;
 152   gint interior_focus;
 153   gint focus_width;
 154   gint focus_pad;
 155
 156   gtk_widget_style_get (widget,
 157                         "interior-focus", &interior_focus,
 158                         "focus-line-width", &focus_width,
 159                         "focus-padding", &focus_pad,
 160                         NULL);
 161
 162   gtk_check_button_draw_indicator (check_button, cr);
 163
 164   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 165   if (gtk_widget_has_focus (widget))
 166     {
 167       GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
 168       GtkStyleContext *context;
 169       GtkStateFlags state;
 170       GtkAllocation allocation;
 171
 172       gtk_widget_get_allocation (widget, &allocation);
 173       context = gtk_widget_get_style_context (widget);
 174       state = gtk_widget_get_state_flags (widget);
 175
 176       gtk_style_context_set_state (context, state);
 177
 178       if (interior_focus && child && gtk_widget_get_visible (child))
 179         {
 180           GtkAllocation child_allocation;
 181
 182           gtk_widget_get_allocation (child, &child_allocation);
 183           gtk_render_focus (context, cr,
 184                             child_allocation.x - allocation.x - focus_width - focus_pad,
 185                             child_allocation.y - allocation.y - focus_width - focus_pad,
 186                             child_allocation.width + 2 * (focus_width + focus_pad),
 187                             child_allocation.height + 2 * (focus_width + focus_pad));
 188         }
 189       else
 190         gtk_render_focus (context, cr,
 191                           border_width, border_width,
 192                           allocation.width - 2 * border_width,
 193                           allocation.height - 2 * border_width);
 194     }
 195 }
 196
 197 void
 198 _gtk_check_button_get_props (GtkCheckButton *check_button,
 199                              gint           *indicator_size,
 200                              gint           *indicator_spacing)
 201 {
 202   GtkWidget *widget =  GTK_WIDGET (check_button);
 203
 204   if (indicator_size)
 205     gtk_widget_style_get (widget, "indicator-size", indicator_size, NULL);
 206
 207   if (indicator_spacing)
 208     gtk_widget_style_get (widget, "indicator-spacing", indicator_spacing, NULL);
 209 }
 210
 211 static void
 212 gtk_check_button_get_preferred_width (GtkWidget *widget,
 213                                       gint      *minimum,
 214                                       gint      *natural)
 215 {
 216   GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (widget);
 217
 218   if (gtk_toggle_button_get_mode (toggle_button))
 219     {
 220       GtkWidget *child;
 221       gint indicator_size;
 222       gint indicator_spacing;
 223       gint focus_width;
 224       gint focus_pad;
 225       guint border_width;
 226
 227       border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 228
 229       gtk_widget_style_get (GTK_WIDGET (widget),
 230                             "focus-line-width", &focus_width,
 231                             "focus-padding", &focus_pad,
 232                             NULL);
 233       *minimum = 2 * border_width;
 234       *natural = 2 * border_width;
 235
 236       _gtk_check_button_get_props (GTK_CHECK_BUTTON (widget),
 237                                    &indicator_size, &indicator_spacing);
 238
 239       child = gtk_bin_get_child (GTK_BIN (widget));
 240       if (child && gtk_widget_get_visible (child))
 241         {
 242           gint child_min, child_nat;
 243
 244           gtk_widget_get_preferred_width (child, &child_min, &child_nat);
 245
 246           *minimum += child_min + indicator_spacing;
 247           *natural += child_nat + indicator_spacing;
 248         }
 249
 250       *minimum += (indicator_size + indicator_spacing * 2 + 2 * (focus_width + focus_pad));
 251       *natural += (indicator_size + indicator_spacing * 2 + 2 * (focus_width + focus_pad));
 252     }
 253   else
 254     GTK_WIDGET_CLASS (gtk_check_button_parent_class)->get_preferred_width (widget, minimum, natural);
 255 }
 256
 257 static void
 258 gtk_check_button_get_preferred_height (GtkWidget *widget,
 259                                        gint      *minimum,
 260                                        gint      *natural)
 261 {
 262   GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (widget);
 263
 264   if (gtk_toggle_button_get_mode (toggle_button))
 265     {
 266       GtkWidget *child;
 267       gint temp;
 268       gint indicator_size;
 269       gint indicator_spacing;
 270       gint focus_width;
 271       gint focus_pad;
 272       guint border_width;
 273
 274       border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 275
 276       gtk_widget_style_get (GTK_WIDGET (widget),
 277                             "focus-line-width", &focus_width,
 278                             "focus-padding", &focus_pad,
 279                             NULL);
 280
 281       *minimum = border_width * 2;
 282       *natural = border_width * 2;
 283
 284       _gtk_check_button_get_props (GTK_CHECK_BUTTON (widget),
 285                                    &indicator_size, &indicator_spacing);
 286
 287       child = gtk_bin_get_child (GTK_BIN (widget));
 288       if (child && gtk_widget_get_visible (child))
 289         {
 290           gint child_min, child_nat;
 291
 292           gtk_widget_get_preferred_height (child, &child_min, &child_nat);
 293
 294           *minimum += child_min;
 295           *natural += child_nat;
 296         }
 297
 298       temp = indicator_size + indicator_spacing * 2;
 299       *minimum = MAX (*minimum, temp) + 2 * (focus_width + focus_pad);
 300       *natural = MAX (*natural, temp) + 2 * (focus_width + focus_pad);
 301     }
 302   else
 303     GTK_WIDGET_CLASS (gtk_check_button_parent_class)->get_preferred_height (widget, minimum, natural);
 304 }
 305
 306 static void
 307 gtk_check_button_size_allocate (GtkWidget     *widget,
 308                                 GtkAllocation *allocation)
 309 {
 310   GtkCheckButton *check_button;
 311   GtkToggleButton *toggle_button;
 312   GtkButton *button;
 313   GtkAllocation child_allocation;
 314
 315   button = GTK_BUTTON (widget);
 316   check_button = GTK_CHECK_BUTTON (widget);
 317   toggle_button = GTK_TOGGLE_BUTTON (widget);
 318
 319   if (gtk_toggle_button_get_mode (toggle_button))
 320     {
 321       GtkWidget *child;
 322       gint indicator_size;
 323       gint indicator_spacing;
 324       gint focus_width;
 325       gint focus_pad;
 326
 327       _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 328       gtk_widget_style_get (widget,
 329                             "focus-line-width", &focus_width,
 330                             "focus-padding", &focus_pad,
 331                             NULL);
 332
 333       gtk_widget_set_allocation (widget, allocation);
 334
 335       if (gtk_widget_get_realized (widget))
 336         gdk_window_move_resize (gtk_button_get_event_window (button),
 337                                 allocation->x, allocation->y,
 338                                 allocation->width, allocation->height);
 339
 340       child = gtk_bin_get_child (GTK_BIN (button));
 341       if (child && gtk_widget_get_visible (child))
 342         {
 343           GtkRequisition child_requisition;
 344           guint border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 345
 346           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 347
 348           child_allocation.width = MIN (child_requisition.width,
 349                                         allocation->width -
 350                                         ((border_width + focus_width + focus_pad) * 2
 351                                          + indicator_size + indicator_spacing * 3));
 352           child_allocation.width = MAX (child_allocation.width, 1);
 353
 354           child_allocation.height = MIN (child_requisition.height,
 355                                          allocation->height - (border_width + focus_width + focus_pad) * 2);
 356           child_allocation.height = MAX (child_allocation.height, 1);
 357
 358           child_allocation.x = (border_width + indicator_size + indicator_spacing * 3 +
 359                                 allocation->x + focus_width + focus_pad);
 360           child_allocation.y = allocation->y + (allocation->height - child_allocation.height) / 2;
 361
 362           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 363             child_allocation.x = allocation->x + allocation->width
 364               - (child_allocation.x - allocation->x + child_allocation.width);
 365
 366           gtk_widget_size_allocate (child, &child_allocation);
 367         }
 368     }
 369   else
 370     GTK_WIDGET_CLASS (gtk_check_button_parent_class)->size_allocate (widget, allocation);
 371 }
 372
 373 static gint
 374 gtk_check_button_draw (GtkWidget *widget,
 375                        cairo_t   *cr)
 376 {
 377   GtkToggleButton *toggle_button;
 378   GtkBin *bin;
 379   GtkWidget *child;
 380
 381   toggle_button = GTK_TOGGLE_BUTTON (widget);
 382   bin = GTK_BIN (widget);
 383
 384   if (gtk_toggle_button_get_mode (toggle_button))
 385     {
 386       gtk_check_button_paint (widget, cr);
 387
 388       child = gtk_bin_get_child (bin);
 389       if (child)
 390         gtk_container_propagate_draw (GTK_CONTAINER (widget),
 391                                       child,
 392                                       cr);
 393     }
 394   else if (GTK_WIDGET_CLASS (gtk_check_button_parent_class)->draw)
 395     GTK_WIDGET_CLASS (gtk_check_button_parent_class)->draw (widget, cr);
 396
 397   return FALSE;
 398 }
 399
 400
 401 static void
 402 gtk_check_button_draw_indicator (GtkCheckButton *check_button,
 403                                  cairo_t        *cr)
 404 {
 405   GtkCheckButtonClass *class = GTK_CHECK_BUTTON_GET_CLASS (check_button);
 406
 407   if (class->draw_indicator)
 408     class->draw_indicator (check_button, cr);
 409 }
 410
 411 static void
 412 gtk_real_check_button_draw_indicator (GtkCheckButton *check_button,
 413                                       cairo_t        *cr)
 414 {
 415   GtkWidget *widget;
 416   GtkWidget *child;
 417   GtkButton *button;
 418   GtkToggleButton *toggle_button;
 419   GtkStateFlags state = 0;
 420   gint x, y;
 421   gint indicator_size;
 422   gint indicator_spacing;
 423   gint focus_width;
 424   gint focus_pad;
 425   guint border_width;
 426   gboolean interior_focus;
 427   GtkAllocation allocation;
 428   GtkStyleContext *context;
 429
 430   widget = GTK_WIDGET (check_button);
 431   button = GTK_BUTTON (check_button);
 432   toggle_button = GTK_TOGGLE_BUTTON (check_button);
 433
 434   gtk_widget_get_allocation (widget, &allocation);
 435   context = gtk_widget_get_style_context (widget);
 436
 437   gtk_widget_style_get (widget,
 438                         "interior-focus", &interior_focus,
 439                         "focus-line-width", &focus_width,
 440                         "focus-padding", &focus_pad,
 441                         NULL);
 442
 443   _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 444
 445   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 446
 447   x = indicator_spacing + border_width;
 448   y = (allocation.height - indicator_size) / 2;
 449
 450   child = gtk_bin_get_child (GTK_BIN (check_button));
 451   if (!interior_focus || !(child && gtk_widget_get_visible (child)))
 452     x += focus_width + focus_pad;
 453
 454   if (gtk_toggle_button_get_inconsistent (toggle_button))
 455     state |= GTK_STATE_FLAG_INCONSISTENT;
 456   else if (gtk_toggle_button_get_active (toggle_button))
 457     state |= GTK_STATE_FLAG_ACTIVE;
 458
 459   if (button->priv->activate_timeout || (button->priv->button_down && button->priv->in_button))
 460     state |= GTK_STATE_FLAG_SELECTED;
 461
 462   if (button->priv->in_button)
 463     state |= GTK_STATE_FLAG_PRELIGHT;
 464   else if (!gtk_widget_is_sensitive (widget))
 465     state |= GTK_STATE_FLAG_INSENSITIVE;
 466
 467   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 468     x = allocation.width - (indicator_size + x);
 469
 470   gtk_style_context_set_state (context, state);
 471
 472   if (state & GTK_STATE_FLAG_PRELIGHT)
 473     gtk_render_background (context, cr,
 474                            border_width, border_width,
 475                            allocation.width - (2 * border_width),
 476                            allocation.height - (2 * border_width));
 477
 478   gtk_style_context_save (context);
 479   gtk_style_context_add_class (context, GTK_STYLE_CLASS_CHECK);
 480
 481   gtk_render_check (context, cr,
 482                     x, y, indicator_size, indicator_size);
 483
 484   gtk_style_context_restore (context);
 485 }