Pileus Git - ~andy/gtk/blob - gtk/gtkpaned.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
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #include "gtkpaned.h"
  20
  21
  22 static void gtk_paned_class_init (GtkPanedClass    *klass);
  23 static void gtk_paned_init       (GtkPaned         *paned);
  24 static void gtk_paned_realize    (GtkWidget *widget);
  25 static void gtk_paned_map        (GtkWidget      *widget);
  26 static void gtk_paned_unmap      (GtkWidget      *widget);
  27 static void gtk_paned_unrealize  (GtkWidget *widget);
  28 static gint gtk_paned_expose     (GtkWidget      *widget,
  29                                   GdkEventExpose *event);
  30 static void gtk_paned_add        (GtkContainer   *container,
  31                                   GtkWidget      *widget);
  32 static void gtk_paned_remove     (GtkContainer   *container,
  33                                   GtkWidget      *widget);
  34 static void gtk_paned_forall   (GtkContainer   *container,
  35                                 gboolean        include_internals,
  36                                 GtkCallback     callback,
  37                                 gpointer        callback_data);
  38 static GtkType gtk_paned_child_type (GtkContainer *container);
  39
  40
  41 static GtkContainerClass *parent_class = NULL;
  42
  43
  44 GtkType
  45 gtk_paned_get_type (void)
  46 {
  47   static GtkType paned_type = 0;
  48
  49   if (!paned_type)
  50     {
  51       GtkTypeInfo paned_info =
  52       {
  53         "GtkPaned",
  54         sizeof (GtkPaned),
  55         sizeof (GtkPanedClass),
  56         (GtkClassInitFunc) gtk_paned_class_init,
  57         (GtkObjectInitFunc) gtk_paned_init,
  58         /* reserved_1 */ NULL,
  59         /* reserved_2 */ NULL,
  60         (GtkClassInitFunc) NULL,
  61       };
  62
  63       paned_type = gtk_type_unique (GTK_TYPE_CONTAINER, &paned_info);
  64     }
  65
  66   return paned_type;
  67 }
  68
  69 static void
  70 gtk_paned_class_init (GtkPanedClass *class)
  71 {
  72   GtkObjectClass *object_class;
  73   GtkWidgetClass *widget_class;
  74   GtkContainerClass *container_class;
  75
  76   object_class = (GtkObjectClass*) class;
  77   widget_class = (GtkWidgetClass*) class;
  78   container_class = (GtkContainerClass*) class;
  79
  80   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  81
  82   widget_class->realize = gtk_paned_realize;
  83   widget_class->map = gtk_paned_map;
  84   widget_class->unmap = gtk_paned_unmap;
  85   widget_class->unrealize = gtk_paned_unrealize;
  86   widget_class->expose_event = gtk_paned_expose;
  87
  88   container_class->add = gtk_paned_add;
  89   container_class->remove = gtk_paned_remove;
  90   container_class->forall = gtk_paned_forall;
  91   container_class->child_type = gtk_paned_child_type;
  92 }
  93
  94 static GtkType
  95 gtk_paned_child_type (GtkContainer *container)
  96 {
  97   if (!GTK_PANED (container)->child1 || !GTK_PANED (container)->child2)
  98     return GTK_TYPE_WIDGET;
  99   else
 100     return GTK_TYPE_NONE;
 101 }
 102
 103 static void
 104 gtk_paned_init (GtkPaned *paned)
 105 {
 106   GTK_WIDGET_UNSET_FLAGS (paned, GTK_NO_WINDOW);
 107
 108   paned->child1 = NULL;
 109   paned->child2 = NULL;
 110   paned->handle = NULL;
 111   paned->xor_gc = NULL;
 112
 113   paned->handle_size = 10;
 114   paned->gutter_size = 6;
 115   paned->position_set = FALSE;
 116   paned->in_drag = FALSE;
 117
 118   paned->handle_xpos = -1;
 119   paned->handle_ypos = -1;
 120 }
 121
 122
 123 static void
 124 gtk_paned_realize (GtkWidget *widget)
 125 {
 126   GtkPaned *paned;
 127   GdkWindowAttr attributes;
 128   gint attributes_mask;
 129
 130   g_return_if_fail (widget != NULL);
 131   g_return_if_fail (GTK_IS_PANED (widget));
 132
 133   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 134   paned = GTK_PANED (widget);
 135
 136   attributes.x = widget->allocation.x;
 137   attributes.y = widget->allocation.y;
 138   attributes.width = widget->allocation.width;
 139   attributes.height = widget->allocation.height;
 140   attributes.window_type = GDK_WINDOW_CHILD;
 141   attributes.wclass = GDK_INPUT_OUTPUT;
 142   attributes.visual = gtk_widget_get_visual (widget);
 143   attributes.colormap = gtk_widget_get_colormap (widget);
 144   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 145   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 146
 147   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 148                                    &attributes, attributes_mask);
 149   gdk_window_set_user_data (widget->window, paned);
 150
 151   attributes.x = paned->handle_xpos;
 152   attributes.y = paned->handle_ypos;
 153   attributes.width = paned->handle_size;
 154   attributes.height = paned->handle_size;
 155   attributes.cursor = paned->cursor = gdk_cursor_new (GDK_CROSS);
 156   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 157                             GDK_BUTTON_RELEASE_MASK |
 158                             GDK_POINTER_MOTION_MASK |
 159                             GDK_POINTER_MOTION_HINT_MASK);
 160   attributes_mask |= GDK_WA_CURSOR;
 161
 162   paned->handle = gdk_window_new (widget->window,
 163                                   &attributes, attributes_mask);
 164   gdk_window_set_user_data (paned->handle, paned);
 165
 166   widget->style = gtk_style_attach (widget->style, widget->window);
 167
 168   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 169   gtk_style_set_background (widget->style, paned->handle, GTK_STATE_NORMAL);
 170
 171   gdk_window_show (paned->handle);
 172 }
 173
 174 static void
 175 gtk_paned_map (GtkWidget *widget)
 176 {
 177   GtkPaned *paned;
 178
 179   g_return_if_fail (widget != NULL);
 180   g_return_if_fail (GTK_IS_PANED (widget));
 181
 182   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 183   paned = GTK_PANED (widget);
 184
 185   gdk_window_show (widget->window);
 186
 187   if (paned->child1 &&
 188       GTK_WIDGET_VISIBLE (paned->child1) &&
 189       !GTK_WIDGET_MAPPED (paned->child1))
 190     gtk_widget_map (paned->child1);
 191   if (paned->child2 &&
 192       GTK_WIDGET_VISIBLE (paned->child2) &&
 193       !GTK_WIDGET_MAPPED (paned->child2))
 194     gtk_widget_map (paned->child2);
 195 }
 196
 197 static void
 198 gtk_paned_unmap (GtkWidget *widget)
 199 {
 200   g_return_if_fail (widget != NULL);
 201   g_return_if_fail (GTK_IS_PANED (widget));
 202
 203   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 204
 205   gdk_window_hide (widget->window);
 206 }
 207
 208 static void
 209 gtk_paned_unrealize (GtkWidget *widget)
 210 {
 211   GtkPaned *paned;
 212
 213   g_return_if_fail (widget != NULL);
 214   g_return_if_fail (GTK_IS_PANED (widget));
 215
 216   paned = GTK_PANED (widget);
 217
 218   if (paned->xor_gc)
 219     {
 220       gdk_gc_destroy (paned->xor_gc);
 221       paned->xor_gc = NULL;
 222     }
 223
 224   if (paned->handle)
 225     {
 226       gdk_window_set_user_data (paned->handle, NULL);
 227       gdk_window_destroy (paned->handle);
 228       paned->handle = NULL;
 229       gdk_cursor_destroy (paned->cursor);
 230       paned->cursor = NULL;
 231     }
 232
 233   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 234     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 235 }
 236
 237 static gint
 238 gtk_paned_expose (GtkWidget      *widget,
 239                   GdkEventExpose *event)
 240 {
 241   GtkPaned *paned;
 242   GdkEventExpose child_event;
 243
 244   g_return_val_if_fail (widget != NULL, FALSE);
 245   g_return_val_if_fail (GTK_IS_PANED (widget), FALSE);
 246   g_return_val_if_fail (event != NULL, FALSE);
 247
 248   if (GTK_WIDGET_DRAWABLE (widget))
 249     {
 250       paned = GTK_PANED (widget);
 251
 252       /* An expose event for the handle */
 253       if (event->window == paned->handle)
 254         {
 255           gdk_window_set_background (paned->handle,
 256                                      &widget->style->bg[widget->state]);
 257           gdk_window_clear (paned->handle);
 258           gtk_draw_shadow (widget->style, paned->handle,
 259                            GTK_WIDGET_STATE(widget),
 260                            GTK_SHADOW_OUT, 0, 0,
 261                            paned->handle_size, paned->handle_size);
 262         }
 263       else
 264         {
 265           child_event = *event;
 266           if (paned->child1 &&
 267               GTK_WIDGET_NO_WINDOW (paned->child1) &&
 268               gtk_widget_intersect (paned->child1, &event->area, &child_event.area))
 269             gtk_widget_event (paned->child1, (GdkEvent*) &child_event);
 270
 271           if (paned->child2 &&
 272               GTK_WIDGET_NO_WINDOW (paned->child2) &&
 273               gtk_widget_intersect (paned->child2, &event->area, &child_event.area))
 274             gtk_widget_event (paned->child2, (GdkEvent*) &child_event);
 275
 276           /* redraw the groove if necessary */
 277           if (gdk_rectangle_intersect (&paned->groove_rectangle,
 278                                        &event->area,
 279                                        &child_event.area))
 280             gtk_widget_draw (widget, &child_event.area);
 281         }
 282     }
 283   return FALSE;
 284 }
 285
 286 void
 287 gtk_paned_add1 (GtkPaned     *paned,
 288                 GtkWidget    *widget)
 289 {
 290   g_return_if_fail (widget != NULL);
 291
 292   if (!paned->child1)
 293     {
 294       gtk_widget_set_parent (widget, GTK_WIDGET (paned));
 295
 296       if (GTK_WIDGET_VISIBLE (widget->parent))
 297         {
 298           if (GTK_WIDGET_REALIZED (widget->parent) &&
 299               !GTK_WIDGET_REALIZED (widget))
 300             gtk_widget_realize (widget);
 301
 302           if (GTK_WIDGET_MAPPED (widget->parent) &&
 303               !GTK_WIDGET_MAPPED (widget))
 304             gtk_widget_map (widget);
 305         }
 306
 307       paned->child1 = widget;
 308
 309       if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (paned))
 310         gtk_widget_queue_resize (widget);
 311     }
 312 }
 313
 314 void
 315 gtk_paned_add2 (GtkPaned  *paned,
 316                 GtkWidget *widget)
 317 {
 318   g_return_if_fail (widget != NULL);
 319
 320   if (!paned->child2)
 321     {
 322       gtk_widget_set_parent (widget, GTK_WIDGET (paned));
 323
 324       if (GTK_WIDGET_VISIBLE (widget->parent))
 325         {
 326           if (GTK_WIDGET_REALIZED (widget->parent) &&
 327               !GTK_WIDGET_REALIZED (widget))
 328             gtk_widget_realize (widget);
 329
 330           if (GTK_WIDGET_MAPPED (widget->parent) &&
 331               !GTK_WIDGET_MAPPED (widget))
 332             gtk_widget_map (widget);
 333         }
 334
 335       paned->child2 = widget;
 336
 337       if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (paned))
 338         gtk_widget_queue_resize (widget);
 339     }
 340 }
 341
 342 static void
 343 gtk_paned_add (GtkContainer *container,
 344                GtkWidget    *widget)
 345 {
 346   GtkPaned *paned;
 347
 348   g_return_if_fail (container != NULL);
 349   g_return_if_fail (GTK_IS_PANED (container));
 350   g_return_if_fail (widget != NULL);
 351
 352   paned = GTK_PANED (container);
 353
 354   if (!paned->child1)
 355     gtk_paned_add1 (GTK_PANED (container),widget);
 356   else if (!paned->child2)
 357     gtk_paned_add2 (GTK_PANED (container),widget);
 358 }
 359
 360 static void
 361 gtk_paned_remove (GtkContainer *container,
 362                   GtkWidget    *widget)
 363 {
 364   GtkPaned *paned;
 365   gboolean was_visible;
 366
 367   g_return_if_fail (container != NULL);
 368   g_return_if_fail (GTK_IS_PANED (container));
 369   g_return_if_fail (widget != NULL);
 370
 371   paned = GTK_PANED (container);
 372   was_visible = GTK_WIDGET_VISIBLE (widget);
 373
 374   if (paned->child1 == widget)
 375     {
 376       gtk_widget_unparent (widget);
 377
 378       paned->child1 = NULL;
 379
 380       if (was_visible && GTK_WIDGET_VISIBLE (container))
 381         gtk_widget_queue_resize (GTK_WIDGET (container));
 382     }
 383   else if (paned->child2 == widget)
 384     {
 385       gtk_widget_unparent (widget);
 386
 387       paned->child2 = NULL;
 388
 389       if (was_visible && GTK_WIDGET_VISIBLE (container))
 390         gtk_widget_queue_resize (GTK_WIDGET (container));
 391     }
 392 }
 393
 394 static void
 395 gtk_paned_forall (GtkContainer *container,
 396                   gboolean      include_internals,
 397                   GtkCallback   callback,
 398                   gpointer      callback_data)
 399 {
 400   GtkPaned *paned;
 401
 402   g_return_if_fail (container != NULL);
 403   g_return_if_fail (GTK_IS_PANED (container));
 404   g_return_if_fail (callback != NULL);
 405
 406   paned = GTK_PANED (container);
 407
 408   if (paned->child1)
 409     (* callback) (paned->child1, callback_data);
 410   if (paned->child2)
 411     (* callback) (paned->child2, callback_data);
 412 }
 413
 414 void
 415 gtk_paned_handle_size (GtkPaned *paned,
 416                        guint16   size)
 417 {
 418   gint x,y;
 419
 420   g_return_if_fail (paned != NULL);
 421   g_return_if_fail (GTK_IS_PANED (paned));
 422
 423   if (paned->handle)
 424     {
 425       gdk_window_get_geometry (paned->handle, &x, &y, NULL, NULL, NULL);
 426       gdk_window_move_resize (paned->handle,
 427                               x + paned->handle_size / 2 - size / 2,
 428                               y + paned->handle_size / 2 - size / 2,
 429                               size, size);
 430     }
 431   paned->handle_size = size;
 432 }
 433
 434 void
 435 gtk_paned_gutter_size (GtkPaned *paned,
 436                        guint16   size)
 437 {
 438   g_return_if_fail (paned != NULL);
 439   g_return_if_fail (GTK_IS_PANED (paned));
 440
 441   paned->gutter_size = size;
 442
 443   if (GTK_WIDGET_VISIBLE (GTK_WIDGET (paned)))
 444     gtk_widget_queue_resize (GTK_WIDGET (paned));
 445 }