Pileus Git - ~andy/gtk/blob - gtk/gtkfixed.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 "gtkfixed.h"
  28
  29
  30 static void gtk_fixed_class_init    (GtkFixedClass    *klass);
  31 static void gtk_fixed_init          (GtkFixed         *fixed);
  32 static void gtk_fixed_map           (GtkWidget        *widget);
  33 static void gtk_fixed_realize       (GtkWidget        *widget);
  34 static void gtk_fixed_size_request  (GtkWidget        *widget,
  35                                      GtkRequisition   *requisition);
  36 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  37                                      GtkAllocation    *allocation);
  38 static void gtk_fixed_paint         (GtkWidget        *widget,
  39                                      GdkRectangle     *area);
  40 static void gtk_fixed_draw          (GtkWidget        *widget,
  41                                      GdkRectangle     *area);
  42 static gint gtk_fixed_expose        (GtkWidget        *widget,
  43                                      GdkEventExpose   *event);
  44 static void gtk_fixed_add           (GtkContainer     *container,
  45                                      GtkWidget        *widget);
  46 static void gtk_fixed_remove        (GtkContainer     *container,
  47                                      GtkWidget        *widget);
  48 static void gtk_fixed_forall        (GtkContainer     *container,
  49                                      gboolean          include_internals,
  50                                      GtkCallback       callback,
  51                                      gpointer          callback_data);
  52 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  53
  54
  55 static GtkContainerClass *parent_class = NULL;
  56
  57
  58 GtkType
  59 gtk_fixed_get_type (void)
  60 {
  61   static GtkType fixed_type = 0;
  62
  63   if (!fixed_type)
  64     {
  65       static const GtkTypeInfo fixed_info =
  66       {
  67         "GtkFixed",
  68         sizeof (GtkFixed),
  69         sizeof (GtkFixedClass),
  70         (GtkClassInitFunc) gtk_fixed_class_init,
  71         (GtkObjectInitFunc) gtk_fixed_init,
  72         /* reserved_1 */ NULL,
  73         /* reserved_2 */ NULL,
  74         (GtkClassInitFunc) NULL,
  75       };
  76
  77       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  78     }
  79
  80   return fixed_type;
  81 }
  82
  83 static void
  84 gtk_fixed_class_init (GtkFixedClass *class)
  85 {
  86   GtkObjectClass *object_class;
  87   GtkWidgetClass *widget_class;
  88   GtkContainerClass *container_class;
  89
  90   object_class = (GtkObjectClass*) class;
  91   widget_class = (GtkWidgetClass*) class;
  92   container_class = (GtkContainerClass*) class;
  93
  94   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  95
  96   widget_class->map = gtk_fixed_map;
  97   widget_class->realize = gtk_fixed_realize;
  98   widget_class->size_request = gtk_fixed_size_request;
  99   widget_class->size_allocate = gtk_fixed_size_allocate;
 100   widget_class->draw = gtk_fixed_draw;
 101   widget_class->expose_event = gtk_fixed_expose;
 102
 103   container_class->add = gtk_fixed_add;
 104   container_class->remove = gtk_fixed_remove;
 105   container_class->forall = gtk_fixed_forall;
 106   container_class->child_type = gtk_fixed_child_type;
 107 }
 108
 109 static GtkType
 110 gtk_fixed_child_type (GtkContainer     *container)
 111 {
 112   return GTK_TYPE_WIDGET;
 113 }
 114
 115 static void
 116 gtk_fixed_init (GtkFixed *fixed)
 117 {
 118   GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 119
 120   fixed->children = NULL;
 121 }
 122
 123 GtkWidget*
 124 gtk_fixed_new (void)
 125 {
 126   GtkFixed *fixed;
 127
 128   fixed = gtk_type_new (GTK_TYPE_FIXED);
 129   return GTK_WIDGET (fixed);
 130 }
 131
 132 void
 133 gtk_fixed_put (GtkFixed       *fixed,
 134                GtkWidget      *widget,
 135                gint16         x,
 136                gint16         y)
 137 {
 138   GtkFixedChild *child_info;
 139
 140   g_return_if_fail (fixed != NULL);
 141   g_return_if_fail (GTK_IS_FIXED (fixed));
 142   g_return_if_fail (widget != NULL);
 143
 144   child_info = g_new (GtkFixedChild, 1);
 145   child_info->widget = widget;
 146   child_info->x = x;
 147   child_info->y = y;
 148
 149   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 150
 151   fixed->children = g_list_append (fixed->children, child_info);
 152
 153   if (GTK_WIDGET_REALIZED (fixed) && !GTK_WIDGET_REALIZED (widget))
 154     gtk_widget_realize (widget);
 155
 156   if (GTK_WIDGET_MAPPED (fixed) && !GTK_WIDGET_MAPPED (widget))
 157     gtk_widget_map (widget);
 158
 159   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 160     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 161 }
 162
 163 void
 164 gtk_fixed_move (GtkFixed       *fixed,
 165                 GtkWidget      *widget,
 166                 gint16         x,
 167                 gint16         y)
 168 {
 169   GtkFixedChild *child;
 170   GList *children;
 171
 172   g_return_if_fail (fixed != NULL);
 173   g_return_if_fail (GTK_IS_FIXED (fixed));
 174   g_return_if_fail (widget != NULL);
 175
 176   children = fixed->children;
 177   while (children)
 178     {
 179       child = children->data;
 180       children = children->next;
 181
 182       if (child->widget == widget)
 183         {
 184           child->x = x;
 185           child->y = y;
 186
 187           if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 188             gtk_widget_queue_resize (GTK_WIDGET (fixed));
 189
 190           break;
 191         }
 192     }
 193 }
 194
 195 static void
 196 gtk_fixed_map (GtkWidget *widget)
 197 {
 198   GtkFixed *fixed;
 199   GtkFixedChild *child;
 200   GList *children;
 201
 202   g_return_if_fail (widget != NULL);
 203   g_return_if_fail (GTK_IS_FIXED (widget));
 204
 205   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 206   fixed = GTK_FIXED (widget);
 207
 208   children = fixed->children;
 209   while (children)
 210     {
 211       child = children->data;
 212       children = children->next;
 213
 214       if (GTK_WIDGET_VISIBLE (child->widget) &&
 215           !GTK_WIDGET_MAPPED (child->widget))
 216         gtk_widget_map (child->widget);
 217     }
 218
 219   gdk_window_show (widget->window);
 220 }
 221
 222 static void
 223 gtk_fixed_realize (GtkWidget *widget)
 224 {
 225   GdkWindowAttr attributes;
 226   gint attributes_mask;
 227
 228   g_return_if_fail (widget != NULL);
 229   g_return_if_fail (GTK_IS_FIXED (widget));
 230
 231   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 232
 233   attributes.window_type = GDK_WINDOW_CHILD;
 234   attributes.x = widget->allocation.x;
 235   attributes.y = widget->allocation.y;
 236   attributes.width = widget->allocation.width;
 237   attributes.height = widget->allocation.height;
 238   attributes.wclass = GDK_INPUT_OUTPUT;
 239   attributes.visual = gtk_widget_get_visual (widget);
 240   attributes.colormap = gtk_widget_get_colormap (widget);
 241   attributes.event_mask = gtk_widget_get_events (widget);
 242   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 243
 244   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 245
 246   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 247                                    attributes_mask);
 248   gdk_window_set_user_data (widget->window, widget);
 249
 250   widget->style = gtk_style_attach (widget->style, widget->window);
 251   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 252 }
 253
 254 static void
 255 gtk_fixed_size_request (GtkWidget      *widget,
 256                         GtkRequisition *requisition)
 257 {
 258   GtkFixed *fixed;
 259   GtkFixedChild *child;
 260   GList *children;
 261   GtkRequisition child_requisition;
 262
 263   g_return_if_fail (widget != NULL);
 264   g_return_if_fail (GTK_IS_FIXED (widget));
 265   g_return_if_fail (requisition != NULL);
 266
 267   fixed = GTK_FIXED (widget);
 268   requisition->width = 0;
 269   requisition->height = 0;
 270
 271   children = fixed->children;
 272   while (children)
 273     {
 274       child = children->data;
 275       children = children->next;
 276
 277       if (GTK_WIDGET_VISIBLE (child->widget))
 278         {
 279           gtk_widget_size_request (child->widget, &child_requisition);
 280
 281           requisition->height = MAX (requisition->height,
 282                                      child->y +
 283                                      child_requisition.height);
 284           requisition->width = MAX (requisition->width,
 285                                     child->x +
 286                                     child_requisition.width);
 287         }
 288     }
 289
 290   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 291   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 292 }
 293
 294 static void
 295 gtk_fixed_size_allocate (GtkWidget     *widget,
 296                          GtkAllocation *allocation)
 297 {
 298   GtkFixed *fixed;
 299   GtkFixedChild *child;
 300   GtkAllocation child_allocation;
 301   GtkRequisition child_requisition;
 302   GList *children;
 303   guint16 border_width;
 304
 305   g_return_if_fail (widget != NULL);
 306   g_return_if_fail (GTK_IS_FIXED(widget));
 307   g_return_if_fail (allocation != NULL);
 308
 309   fixed = GTK_FIXED (widget);
 310
 311   widget->allocation = *allocation;
 312   if (GTK_WIDGET_REALIZED (widget))
 313     gdk_window_move_resize (widget->window,
 314                             allocation->x,
 315                             allocation->y,
 316                             allocation->width,
 317                             allocation->height);
 318
 319   border_width = GTK_CONTAINER (fixed)->border_width;
 320
 321   children = fixed->children;
 322   while (children)
 323     {
 324       child = children->data;
 325       children = children->next;
 326
 327       if (GTK_WIDGET_VISIBLE (child->widget))
 328         {
 329           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 330           child_allocation.x = child->x + border_width;
 331           child_allocation.y = child->y + border_width;
 332           child_allocation.width = child_requisition.width;
 333           child_allocation.height = child_requisition.height;
 334           gtk_widget_size_allocate (child->widget, &child_allocation);
 335         }
 336     }
 337 }
 338
 339 static void
 340 gtk_fixed_paint (GtkWidget    *widget,
 341                  GdkRectangle *area)
 342 {
 343   g_return_if_fail (widget != NULL);
 344   g_return_if_fail (GTK_IS_FIXED (widget));
 345   g_return_if_fail (area != NULL);
 346
 347   if (GTK_WIDGET_DRAWABLE (widget))
 348     gdk_window_clear_area (widget->window,
 349                            area->x, area->y,
 350                            area->width, area->height);
 351 }
 352
 353 static void
 354 gtk_fixed_draw (GtkWidget    *widget,
 355                 GdkRectangle *area)
 356 {
 357   GtkFixed *fixed;
 358   GtkFixedChild *child;
 359   GdkRectangle child_area;
 360   GList *children;
 361
 362   g_return_if_fail (widget != NULL);
 363   g_return_if_fail (GTK_IS_FIXED (widget));
 364
 365   if (GTK_WIDGET_DRAWABLE (widget))
 366     {
 367       fixed = GTK_FIXED (widget);
 368       gtk_fixed_paint (widget, area);
 369
 370       children = fixed->children;
 371       while (children)
 372         {
 373           child = children->data;
 374           children = children->next;
 375
 376           if (gtk_widget_intersect (child->widget, area, &child_area))
 377             gtk_widget_draw (child->widget, &child_area);
 378         }
 379     }
 380 }
 381
 382 static gint
 383 gtk_fixed_expose (GtkWidget      *widget,
 384                   GdkEventExpose *event)
 385 {
 386   GtkFixed *fixed;
 387   GtkFixedChild *child;
 388   GdkEventExpose child_event;
 389   GList *children;
 390
 391   g_return_val_if_fail (widget != NULL, FALSE);
 392   g_return_val_if_fail (GTK_IS_FIXED (widget), FALSE);
 393   g_return_val_if_fail (event != NULL, FALSE);
 394
 395   if (GTK_WIDGET_DRAWABLE (widget))
 396     {
 397       fixed = GTK_FIXED (widget);
 398
 399       child_event = *event;
 400
 401       children = fixed->children;
 402       while (children)
 403         {
 404           child = children->data;
 405           children = children->next;
 406
 407           if (GTK_WIDGET_NO_WINDOW (child->widget) &&
 408               gtk_widget_intersect (child->widget, &event->area,
 409                                     &child_event.area))
 410             gtk_widget_event (child->widget, (GdkEvent*) &child_event);
 411         }
 412     }
 413
 414   return FALSE;
 415 }
 416
 417 static void
 418 gtk_fixed_add (GtkContainer *container,
 419                GtkWidget    *widget)
 420 {
 421   g_return_if_fail (container != NULL);
 422   g_return_if_fail (GTK_IS_FIXED (container));
 423   g_return_if_fail (widget != NULL);
 424
 425   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 426 }
 427
 428 static void
 429 gtk_fixed_remove (GtkContainer *container,
 430                   GtkWidget    *widget)
 431 {
 432   GtkFixed *fixed;
 433   GtkFixedChild *child;
 434   GList *children;
 435
 436   g_return_if_fail (container != NULL);
 437   g_return_if_fail (GTK_IS_FIXED (container));
 438   g_return_if_fail (widget != NULL);
 439
 440   fixed = GTK_FIXED (container);
 441
 442   children = fixed->children;
 443   while (children)
 444     {
 445       child = children->data;
 446
 447       if (child->widget == widget)
 448         {
 449           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 450
 451           gtk_widget_unparent (widget);
 452
 453           fixed->children = g_list_remove_link (fixed->children, children);
 454           g_list_free (children);
 455           g_free (child);
 456
 457           if (was_visible && GTK_WIDGET_VISIBLE (container))
 458             gtk_widget_queue_resize (GTK_WIDGET (container));
 459
 460           break;
 461         }
 462
 463       children = children->next;
 464     }
 465 }
 466
 467 static void
 468 gtk_fixed_forall (GtkContainer *container,
 469                   gboolean      include_internals,
 470                   GtkCallback   callback,
 471                   gpointer      callback_data)
 472 {
 473   GtkFixed *fixed;
 474   GtkFixedChild *child;
 475   GList *children;
 476
 477   g_return_if_fail (container != NULL);
 478   g_return_if_fail (GTK_IS_FIXED (container));
 479   g_return_if_fail (callback != NULL);
 480
 481   fixed = GTK_FIXED (container);
 482
 483   children = fixed->children;
 484   while (children)
 485     {
 486       child = children->data;
 487       children = children->next;
 488
 489       (* callback) (child->widget, callback_data);
 490     }
 491 }