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