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