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
  20 /*
  21  * Modified by the GTK+ Team and others 1997-1999.  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 "gtkpaned.h"
  28
  29
  30 static void gtk_paned_class_init (GtkPanedClass    *klass);
  31 static void gtk_paned_init       (GtkPaned         *paned);
  32 static void gtk_paned_realize    (GtkWidget *widget);
  33 static void gtk_paned_map        (GtkWidget      *widget);
  34 static void gtk_paned_unmap      (GtkWidget      *widget);
  35 static void gtk_paned_unrealize  (GtkWidget *widget);
  36 static gint gtk_paned_expose     (GtkWidget      *widget,
  37                                   GdkEventExpose *event);
  38 static void gtk_paned_add        (GtkContainer   *container,
  39                                   GtkWidget      *widget);
  40 static void gtk_paned_remove     (GtkContainer   *container,
  41                                   GtkWidget      *widget);
  42 static void gtk_paned_forall     (GtkContainer   *container,
  43                                   gboolean        include_internals,
  44                                   GtkCallback     callback,
  45                                   gpointer        callback_data);
  46 static GtkType gtk_paned_child_type (GtkContainer *container);
  47
  48
  49 static GtkContainerClass *parent_class = NULL;
  50
  51
  52 GtkType
  53 gtk_paned_get_type (void)
  54 {
  55   static GtkType paned_type = 0;
  56
  57   if (!paned_type)
  58     {
  59       static const GtkTypeInfo paned_info =
  60       {
  61         "GtkPaned",
  62         sizeof (GtkPaned),
  63         sizeof (GtkPanedClass),
  64         (GtkClassInitFunc) gtk_paned_class_init,
  65         (GtkObjectInitFunc) gtk_paned_init,
  66         /* reserved_1 */ NULL,
  67         /* reserved_2 */ NULL,
  68         (GtkClassInitFunc) NULL,
  69       };
  70
  71       paned_type = gtk_type_unique (GTK_TYPE_CONTAINER, &paned_info);
  72     }
  73
  74   return paned_type;
  75 }
  76
  77 static void
  78 gtk_paned_class_init (GtkPanedClass *class)
  79 {
  80   GtkObjectClass *object_class;
  81   GtkWidgetClass *widget_class;
  82   GtkContainerClass *container_class;
  83
  84   object_class = (GtkObjectClass*) class;
  85   widget_class = (GtkWidgetClass*) class;
  86   container_class = (GtkContainerClass*) class;
  87
  88   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  89
  90   widget_class->realize = gtk_paned_realize;
  91   widget_class->map = gtk_paned_map;
  92   widget_class->unmap = gtk_paned_unmap;
  93   widget_class->unrealize = gtk_paned_unrealize;
  94   widget_class->expose_event = gtk_paned_expose;
  95
  96   container_class->add = gtk_paned_add;
  97   container_class->remove = gtk_paned_remove;
  98   container_class->forall = gtk_paned_forall;
  99   container_class->child_type = gtk_paned_child_type;
 100 }
 101
 102 static GtkType
 103 gtk_paned_child_type (GtkContainer *container)
 104 {
 105   if (!GTK_PANED (container)->child1 || !GTK_PANED (container)->child2)
 106     return GTK_TYPE_WIDGET;
 107   else
 108     return GTK_TYPE_NONE;
 109 }
 110
 111 static void
 112 gtk_paned_init (GtkPaned *paned)
 113 {
 114   GTK_WIDGET_UNSET_FLAGS (paned, GTK_NO_WINDOW);
 115
 116   paned->child1 = NULL;
 117   paned->child2 = NULL;
 118   paned->handle = NULL;
 119   paned->xor_gc = NULL;
 120
 121   paned->handle_size = 10;
 122   paned->gutter_size = 6;
 123   paned->position_set = FALSE;
 124   paned->last_allocation = -1;
 125   paned->in_drag = FALSE;
 126
 127   paned->handle_xpos = -1;
 128   paned->handle_ypos = -1;
 129 }
 130
 131
 132 static void
 133 gtk_paned_realize (GtkWidget *widget)
 134 {
 135   GtkPaned *paned;
 136   GdkWindowAttr attributes;
 137   gint attributes_mask;
 138
 139   g_return_if_fail (widget != NULL);
 140   g_return_if_fail (GTK_IS_PANED (widget));
 141
 142   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 143   paned = GTK_PANED (widget);
 144
 145   attributes.x = widget->allocation.x;
 146   attributes.y = widget->allocation.y;
 147   attributes.width = widget->allocation.width;
 148   attributes.height = widget->allocation.height;
 149   attributes.window_type = GDK_WINDOW_CHILD;
 150   attributes.wclass = GDK_INPUT_OUTPUT;
 151   attributes.visual = gtk_widget_get_visual (widget);
 152   attributes.colormap = gtk_widget_get_colormap (widget);
 153   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 154   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 155
 156   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 157                                    &attributes, attributes_mask);
 158   gdk_window_set_user_data (widget->window, paned);
 159
 160   attributes.x = paned->handle_xpos;
 161   attributes.y = paned->handle_ypos;
 162   attributes.width = paned->handle_size;
 163   attributes.height = paned->handle_size;
 164   attributes.cursor = gdk_cursor_new (GDK_CROSS);
 165   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 166                             GDK_BUTTON_RELEASE_MASK |
 167                             GDK_POINTER_MOTION_MASK |
 168                             GDK_POINTER_MOTION_HINT_MASK);
 169   attributes_mask |= GDK_WA_CURSOR;
 170
 171   paned->handle = gdk_window_new (widget->window,
 172                                   &attributes, attributes_mask);
 173   gdk_window_set_user_data (paned->handle, paned);
 174   gdk_cursor_destroy (attributes.cursor);
 175
 176   widget->style = gtk_style_attach (widget->style, widget->window);
 177
 178   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 179   gtk_style_set_background (widget->style, paned->handle, GTK_STATE_NORMAL);
 180
 181   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 182
 183   gdk_window_show (paned->handle);
 184 }
 185
 186 static void
 187 gtk_paned_map (GtkWidget *widget)
 188 {
 189   GtkPaned *paned;
 190
 191   g_return_if_fail (widget != NULL);
 192   g_return_if_fail (GTK_IS_PANED (widget));
 193
 194   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 195   paned = GTK_PANED (widget);
 196
 197   if (paned->child1 &&
 198       GTK_WIDGET_VISIBLE (paned->child1) &&
 199       !GTK_WIDGET_MAPPED (paned->child1))
 200     gtk_widget_map (paned->child1);
 201   if (paned->child2 &&
 202       GTK_WIDGET_VISIBLE (paned->child2) &&
 203       !GTK_WIDGET_MAPPED (paned->child2))
 204     gtk_widget_map (paned->child2);
 205
 206   gdk_window_show (widget->window);
 207 }
 208
 209 static void
 210 gtk_paned_unmap (GtkWidget *widget)
 211 {
 212   g_return_if_fail (widget != NULL);
 213   g_return_if_fail (GTK_IS_PANED (widget));
 214
 215   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 216
 217   gdk_window_hide (widget->window);
 218 }
 219
 220 static void
 221 gtk_paned_unrealize (GtkWidget *widget)
 222 {
 223   GtkPaned *paned;
 224
 225   g_return_if_fail (widget != NULL);
 226   g_return_if_fail (GTK_IS_PANED (widget));
 227
 228   paned = GTK_PANED (widget);
 229
 230   if (paned->xor_gc)
 231     {
 232       gdk_gc_destroy (paned->xor_gc);
 233       paned->xor_gc = NULL;
 234     }
 235
 236   if (paned->handle)
 237     {
 238       gdk_window_set_user_data (paned->handle, NULL);
 239       gdk_window_destroy (paned->handle);
 240       paned->handle = NULL;
 241     }
 242
 243   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 244     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 245 }
 246
 247 static gint
 248 gtk_paned_expose (GtkWidget      *widget,
 249                   GdkEventExpose *event)
 250 {
 251   GtkPaned *paned;
 252   GdkEventExpose child_event;
 253
 254   g_return_val_if_fail (widget != NULL, FALSE);
 255   g_return_val_if_fail (GTK_IS_PANED (widget), FALSE);
 256   g_return_val_if_fail (event != NULL, FALSE);
 257
 258   if (GTK_WIDGET_DRAWABLE (widget))
 259     {
 260       paned = GTK_PANED (widget);
 261
 262       /* An expose event for the handle */
 263       if (event->window == paned->handle)
 264         {
 265            gtk_paint_box (widget->style, paned->handle,
 266                           GTK_WIDGET_STATE(widget),
 267                           GTK_SHADOW_OUT,
 268                           &event->area, widget, "paned",
 269                           0, 0,
 270                           paned->handle_size, paned->handle_size);
 271         }
 272       else
 273         {
 274           child_event = *event;
 275           if (paned->child1 &&
 276               GTK_WIDGET_NO_WINDOW (paned->child1) &&
 277               gtk_widget_intersect (paned->child1, &event->area, &child_event.area))
 278             gtk_widget_event (paned->child1, (GdkEvent*) &child_event);
 279
 280           if (paned->child2 &&
 281               GTK_WIDGET_NO_WINDOW (paned->child2) &&
 282               gtk_widget_intersect (paned->child2, &event->area, &child_event.area))
 283             gtk_widget_event (paned->child2, (GdkEvent*) &child_event);
 284
 285           /* redraw the groove if necessary */
 286           if (gdk_rectangle_intersect (&paned->groove_rectangle,
 287                                        &event->area,
 288                                        &child_event.area))
 289             gtk_widget_draw (widget, &child_event.area);
 290         }
 291     }
 292   return FALSE;
 293 }
 294
 295 void
 296 gtk_paned_add1 (GtkPaned     *paned,
 297                 GtkWidget    *widget)
 298 {
 299   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
 300 }
 301
 302 void
 303 gtk_paned_add2 (GtkPaned  *paned,
 304                 GtkWidget *widget)
 305 {
 306   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
 307 }
 308
 309 void
 310 gtk_paned_pack1 (GtkPaned     *paned,
 311                  GtkWidget    *widget,
 312                  gboolean      resize,
 313                  gboolean      shrink)
 314 {
 315   g_return_if_fail (paned != NULL);
 316   g_return_if_fail (GTK_IS_PANED (paned));
 317   g_return_if_fail (widget != NULL);
 318
 319   if (!paned->child1)
 320     {
 321       gtk_widget_set_parent (widget, GTK_WIDGET (paned));
 322
 323       if (GTK_WIDGET_VISIBLE (widget->parent))
 324         {
 325           if (GTK_WIDGET_REALIZED (widget->parent) &&
 326               !GTK_WIDGET_REALIZED (widget))
 327             gtk_widget_realize (widget);
 328
 329           if (GTK_WIDGET_MAPPED (widget->parent) &&
 330               !GTK_WIDGET_MAPPED (widget))
 331             gtk_widget_map (widget);
 332         }
 333
 334       paned->child1 = widget;
 335       paned->child1_resize = resize;
 336       paned->child1_shrink = shrink;
 337
 338       if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (paned))
 339         gtk_widget_queue_resize (widget);
 340     }
 341 }
 342
 343 void
 344 gtk_paned_pack2 (GtkPaned  *paned,
 345                  GtkWidget *widget,
 346                  gboolean   resize,
 347                  gboolean   shrink)
 348 {
 349   g_return_if_fail (paned != NULL);
 350   g_return_if_fail (GTK_IS_PANED (paned));
 351   g_return_if_fail (widget != NULL);
 352
 353   if (!paned->child2)
 354     {
 355       gtk_widget_set_parent (widget, GTK_WIDGET (paned));
 356
 357       if (GTK_WIDGET_VISIBLE (widget->parent))
 358         {
 359           if (GTK_WIDGET_REALIZED (widget->parent) &&
 360               !GTK_WIDGET_REALIZED (widget))
 361             gtk_widget_realize (widget);
 362
 363           if (GTK_WIDGET_MAPPED (widget->parent) &&
 364               !GTK_WIDGET_MAPPED (widget))
 365             gtk_widget_map (widget);
 366         }
 367
 368       paned->child2 = widget;
 369       paned->child2_resize = resize;
 370       paned->child2_shrink = shrink;
 371
 372       if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (paned))
 373         gtk_widget_queue_resize (widget);
 374     }
 375 }
 376
 377 static void
 378 gtk_paned_add (GtkContainer *container,
 379                GtkWidget    *widget)
 380 {
 381   GtkPaned *paned;
 382
 383   g_return_if_fail (container != NULL);
 384   g_return_if_fail (GTK_IS_PANED (container));
 385   g_return_if_fail (widget != NULL);
 386
 387   paned = GTK_PANED (container);
 388
 389   if (!paned->child1)
 390     gtk_paned_add1 (GTK_PANED (container),widget);
 391   else if (!paned->child2)
 392     gtk_paned_add2 (GTK_PANED (container),widget);
 393 }
 394
 395 static void
 396 gtk_paned_remove (GtkContainer *container,
 397                   GtkWidget    *widget)
 398 {
 399   GtkPaned *paned;
 400   gboolean was_visible;
 401
 402   g_return_if_fail (container != NULL);
 403   g_return_if_fail (GTK_IS_PANED (container));
 404   g_return_if_fail (widget != NULL);
 405
 406   paned = GTK_PANED (container);
 407   was_visible = GTK_WIDGET_VISIBLE (widget);
 408
 409   if (paned->child1 == widget)
 410     {
 411       gtk_widget_unparent (widget);
 412
 413       paned->child1 = NULL;
 414
 415       if (was_visible && GTK_WIDGET_VISIBLE (container))
 416         gtk_widget_queue_resize (GTK_WIDGET (container));
 417     }
 418   else if (paned->child2 == widget)
 419     {
 420       gtk_widget_unparent (widget);
 421
 422       paned->child2 = NULL;
 423
 424       if (was_visible && GTK_WIDGET_VISIBLE (container))
 425         gtk_widget_queue_resize (GTK_WIDGET (container));
 426     }
 427 }
 428
 429 static void
 430 gtk_paned_forall (GtkContainer *container,
 431                   gboolean      include_internals,
 432                   GtkCallback   callback,
 433                   gpointer      callback_data)
 434 {
 435   GtkPaned *paned;
 436
 437   g_return_if_fail (container != NULL);
 438   g_return_if_fail (GTK_IS_PANED (container));
 439   g_return_if_fail (callback != NULL);
 440
 441   paned = GTK_PANED (container);
 442
 443   if (paned->child1)
 444     (* callback) (paned->child1, callback_data);
 445   if (paned->child2)
 446     (* callback) (paned->child2, callback_data);
 447 }
 448
 449 void
 450 gtk_paned_set_position    (GtkPaned  *paned,
 451                            gint       position)
 452 {
 453   g_return_if_fail (paned != NULL);
 454   g_return_if_fail (GTK_IS_PANED (paned));
 455
 456   if (position >= 0)
 457     {
 458       paned->child1_size = CLAMP (position,
 459                                   paned->min_position,
 460                                   paned->max_position);
 461       paned->position_set = TRUE;
 462     }
 463   else
 464     paned->position_set = FALSE;
 465
 466   gtk_widget_queue_resize (GTK_WIDGET (paned));
 467 }
 468
 469 void
 470 gtk_paned_set_handle_size (GtkPaned *paned,
 471                            guint16   size)
 472 {
 473   gint x,y;
 474
 475   g_return_if_fail (paned != NULL);
 476   g_return_if_fail (GTK_IS_PANED (paned));
 477
 478   if (paned->handle)
 479     {
 480       gdk_window_get_geometry (paned->handle, &x, &y, NULL, NULL, NULL);
 481       gdk_window_move_resize (paned->handle,
 482                               x + paned->handle_size / 2 - size / 2,
 483                               y + paned->handle_size / 2 - size / 2,
 484                               size, size);
 485     }
 486   paned->handle_size = size;
 487 }
 488
 489 void
 490 gtk_paned_set_gutter_size (GtkPaned *paned,
 491                            guint16   size)
 492 {
 493   g_return_if_fail (paned != NULL);
 494   g_return_if_fail (GTK_IS_PANED (paned));
 495
 496   paned->gutter_size = size;
 497
 498   if (GTK_WIDGET_VISIBLE (GTK_WIDGET (paned)))
 499     gtk_widget_queue_resize (GTK_WIDGET (paned));
 500 }
 501
 502 void
 503 gtk_paned_compute_position (GtkPaned *paned,
 504                             gint      allocation,
 505                             gint      child1_req,
 506                             gint      child2_req)
 507 {
 508   g_return_if_fail (paned != NULL);
 509   g_return_if_fail (GTK_IS_PANED (paned));
 510
 511   paned->min_position = paned->child1_shrink ? 0 : child1_req;
 512
 513   paned->max_position = allocation;
 514   if (!paned->child2_shrink)
 515     paned->max_position -= child2_req;
 516
 517   if (!paned->position_set)
 518     {
 519       if (paned->child1_resize && !paned->child2_resize)
 520         paned->child1_size = allocation - child2_req;
 521       else if (!paned->child1_resize && paned->child2_resize)
 522         paned->child1_size = child1_req;
 523       else
 524         paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req));
 525     }
 526   else
 527     {
 528       if (paned->last_allocation < 0)
 529         paned->last_allocation = allocation;
 530
 531       if (paned->child1_resize && !paned->child2_resize)
 532         paned->child1_size += (allocation - paned->last_allocation);
 533       else if (!(!paned->child1_resize && paned->child2_resize))
 534         paned->child1_size = allocation * ((gdouble)paned->child1_size / (paned->last_allocation));
 535     }
 536
 537   paned->child1_size = CLAMP (paned->child1_size,
 538                               paned->min_position,
 539                               paned->max_position);
 540
 541   paned->last_allocation = allocation;
 542
 543 }