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 Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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 1997-2000.  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 #include "gtkintl.h"
  29
  30 enum {
  31   CHILD_PROP_0,
  32   CHILD_PROP_X,
  33   CHILD_PROP_Y
  34 };
  35
  36 static void gtk_fixed_class_init    (GtkFixedClass    *klass);
  37 static void gtk_fixed_init          (GtkFixed         *fixed);
  38 static void gtk_fixed_realize       (GtkWidget        *widget);
  39 static void gtk_fixed_size_request  (GtkWidget        *widget,
  40                                      GtkRequisition   *requisition);
  41 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  42                                      GtkAllocation    *allocation);
  43 static void gtk_fixed_add           (GtkContainer     *container,
  44                                      GtkWidget        *widget);
  45 static void gtk_fixed_remove        (GtkContainer     *container,
  46                                      GtkWidget        *widget);
  47 static void gtk_fixed_forall        (GtkContainer     *container,
  48                                      gboolean          include_internals,
  49                                      GtkCallback       callback,
  50                                      gpointer          callback_data);
  51 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  52
  53 static void gtk_fixed_set_child_property (GtkContainer *container,
  54                                           GtkWidget    *child,
  55                                           guint         property_id,
  56                                           const GValue *value,
  57                                           GParamSpec   *pspec);
  58 static void gtk_fixed_get_child_property (GtkContainer *container,
  59                                           GtkWidget    *child,
  60                                           guint         property_id,
  61                                           GValue       *value,
  62                                           GParamSpec   *pspec);
  63
  64 static GtkContainerClass *parent_class = NULL;
  65
  66
  67 GtkType
  68 gtk_fixed_get_type (void)
  69 {
  70   static GtkType fixed_type = 0;
  71
  72   if (!fixed_type)
  73     {
  74       static const GtkTypeInfo fixed_info =
  75       {
  76         "GtkFixed",
  77         sizeof (GtkFixed),
  78         sizeof (GtkFixedClass),
  79         (GtkClassInitFunc) gtk_fixed_class_init,
  80         (GtkObjectInitFunc) gtk_fixed_init,
  81         /* reserved_1 */ NULL,
  82         /* reserved_2 */ NULL,
  83         (GtkClassInitFunc) NULL,
  84       };
  85
  86       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  87     }
  88
  89   return fixed_type;
  90 }
  91
  92 static void
  93 gtk_fixed_class_init (GtkFixedClass *class)
  94 {
  95   GtkObjectClass *object_class;
  96   GtkWidgetClass *widget_class;
  97   GtkContainerClass *container_class;
  98
  99   object_class = (GtkObjectClass*) class;
 100   widget_class = (GtkWidgetClass*) class;
 101   container_class = (GtkContainerClass*) class;
 102
 103   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 104
 105   widget_class->realize = gtk_fixed_realize;
 106   widget_class->size_request = gtk_fixed_size_request;
 107   widget_class->size_allocate = gtk_fixed_size_allocate;
 108
 109   container_class->add = gtk_fixed_add;
 110   container_class->remove = gtk_fixed_remove;
 111   container_class->forall = gtk_fixed_forall;
 112   container_class->child_type = gtk_fixed_child_type;
 113
 114   container_class->set_child_property = gtk_fixed_set_child_property;
 115   container_class->get_child_property = gtk_fixed_get_child_property;
 116
 117   gtk_container_class_install_child_property (container_class,
 118                                               CHILD_PROP_X,
 119                                               g_param_spec_int ("x",
 120                                                                 _("X position"),
 121                                                                 _("X position of child widget"),
 122                                                                 G_MININT,
 123                                                                 G_MAXINT,
 124                                                                 0,
 125                                                                 G_PARAM_READWRITE));
 126
 127   gtk_container_class_install_child_property (container_class,
 128                                               CHILD_PROP_Y,
 129                                               g_param_spec_int ("y",
 130                                                                 _("Y position"),
 131                                                                 _("Y position of child widget"),
 132                                                                 G_MININT,
 133                                                                 G_MAXINT,
 134                                                                 0,
 135                                                                 G_PARAM_READWRITE));
 136 }
 137
 138 static GtkType
 139 gtk_fixed_child_type (GtkContainer     *container)
 140 {
 141   return GTK_TYPE_WIDGET;
 142 }
 143
 144 static void
 145 gtk_fixed_init (GtkFixed *fixed)
 146 {
 147   GTK_WIDGET_SET_FLAGS (fixed, GTK_NO_WINDOW);
 148
 149   fixed->children = NULL;
 150 }
 151
 152 GtkWidget*
 153 gtk_fixed_new (void)
 154 {
 155   GtkFixed *fixed;
 156
 157   fixed = gtk_type_new (GTK_TYPE_FIXED);
 158   return GTK_WIDGET (fixed);
 159 }
 160
 161 static GtkFixedChild*
 162 get_child (GtkFixed  *fixed,
 163            GtkWidget *widget)
 164 {
 165   GList *children;
 166
 167   children = fixed->children;
 168   while (children)
 169     {
 170       GtkFixedChild *child;
 171
 172       child = children->data;
 173       children = children->next;
 174
 175       if (child->widget == widget)
 176         return child;
 177     }
 178
 179   return NULL;
 180 }
 181
 182 void
 183 gtk_fixed_put (GtkFixed       *fixed,
 184                GtkWidget      *widget,
 185                gint            x,
 186                gint            y)
 187 {
 188   GtkFixedChild *child_info;
 189
 190   g_return_if_fail (GTK_IS_FIXED (fixed));
 191   g_return_if_fail (widget != NULL);
 192
 193   child_info = g_new (GtkFixedChild, 1);
 194   child_info->widget = widget;
 195   child_info->x = x;
 196   child_info->y = y;
 197
 198   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 199
 200   fixed->children = g_list_append (fixed->children, child_info);
 201 }
 202
 203 static void
 204 gtk_fixed_move_internal (GtkFixed       *fixed,
 205                          GtkWidget      *widget,
 206                          gboolean        change_x,
 207                          gint            x,
 208                          gboolean        change_y,
 209                          gint            y)
 210 {
 211   GtkFixedChild *child;
 212
 213   g_return_if_fail (GTK_IS_FIXED (fixed));
 214   g_return_if_fail (GTK_IS_WIDGET (widget));
 215   g_return_if_fail (widget->parent == GTK_WIDGET (fixed));
 216
 217   child = get_child (fixed, widget);
 218
 219   g_assert (child);
 220
 221   gtk_widget_freeze_child_notify (widget);
 222
 223   if (change_x)
 224     {
 225       child->x = x;
 226       gtk_widget_child_notify (widget, "x");
 227     }
 228
 229   if (change_y)
 230     {
 231       child->y = y;
 232       gtk_widget_child_notify (widget, "y");
 233     }
 234
 235   gtk_widget_thaw_child_notify (widget);
 236
 237   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 238     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 239 }
 240
 241 void
 242 gtk_fixed_move (GtkFixed       *fixed,
 243                 GtkWidget      *widget,
 244                 gint            x,
 245                 gint            y)
 246 {
 247   g_return_if_fail (GTK_IS_FIXED (fixed));
 248   g_return_if_fail (GTK_IS_WIDGET (widget));
 249   g_return_if_fail (widget->parent == GTK_WIDGET (fixed));
 250
 251   gtk_fixed_move_internal (fixed, widget, TRUE, x, TRUE, y);
 252 }
 253
 254 static void
 255 gtk_fixed_set_child_property (GtkContainer    *container,
 256                               GtkWidget       *child,
 257                               guint            property_id,
 258                               const GValue    *value,
 259                               GParamSpec      *pspec)
 260 {
 261   switch (property_id)
 262     {
 263     case CHILD_PROP_X:
 264       gtk_fixed_move_internal (GTK_FIXED (container),
 265                                child,
 266                                TRUE, g_value_get_int (value),
 267                                FALSE, 0);
 268       break;
 269     case CHILD_PROP_Y:
 270       gtk_fixed_move_internal (GTK_FIXED (container),
 271                                child,
 272                                FALSE, 0,
 273                                TRUE, g_value_get_int (value));
 274       break;
 275     default:
 276       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 277       break;
 278     }
 279 }
 280
 281 static void
 282 gtk_fixed_get_child_property (GtkContainer *container,
 283                               GtkWidget    *child,
 284                               guint         property_id,
 285                               GValue       *value,
 286                               GParamSpec   *pspec)
 287 {
 288   GtkFixedChild *fixed_child;
 289
 290   fixed_child = get_child (GTK_FIXED (container), child);
 291
 292   switch (property_id)
 293     {
 294     case CHILD_PROP_X:
 295       g_value_set_int (value, fixed_child->x);
 296       break;
 297     case CHILD_PROP_Y:
 298       g_value_set_int (value, fixed_child->y);
 299       break;
 300     default:
 301       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 302       break;
 303     }
 304 }
 305
 306 static void
 307 gtk_fixed_realize (GtkWidget *widget)
 308 {
 309   GdkWindowAttr attributes;
 310   gint attributes_mask;
 311
 312   g_return_if_fail (GTK_IS_FIXED (widget));
 313
 314   if (GTK_WIDGET_NO_WINDOW (widget))
 315     GTK_WIDGET_CLASS (parent_class)->realize (widget);
 316   else
 317     {
 318       GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 319
 320       attributes.window_type = GDK_WINDOW_CHILD;
 321       attributes.x = widget->allocation.x;
 322       attributes.y = widget->allocation.y;
 323       attributes.width = widget->allocation.width;
 324       attributes.height = widget->allocation.height;
 325       attributes.wclass = GDK_INPUT_OUTPUT;
 326       attributes.visual = gtk_widget_get_visual (widget);
 327       attributes.colormap = gtk_widget_get_colormap (widget);
 328       attributes.event_mask = gtk_widget_get_events (widget);
 329       attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 330
 331       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 332
 333       widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 334                                        attributes_mask);
 335       gdk_window_set_user_data (widget->window, widget);
 336
 337       widget->style = gtk_style_attach (widget->style, widget->window);
 338       gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 339     }
 340 }
 341
 342 static void
 343 gtk_fixed_size_request (GtkWidget      *widget,
 344                         GtkRequisition *requisition)
 345 {
 346   GtkFixed *fixed;
 347   GtkFixedChild *child;
 348   GList *children;
 349   GtkRequisition child_requisition;
 350
 351   g_return_if_fail (GTK_IS_FIXED (widget));
 352   g_return_if_fail (requisition != NULL);
 353
 354   fixed = GTK_FIXED (widget);
 355   requisition->width = 0;
 356   requisition->height = 0;
 357
 358   children = fixed->children;
 359   while (children)
 360     {
 361       child = children->data;
 362       children = children->next;
 363
 364       if (GTK_WIDGET_VISIBLE (child->widget))
 365         {
 366           gtk_widget_size_request (child->widget, &child_requisition);
 367
 368           requisition->height = MAX (requisition->height,
 369                                      child->y +
 370                                      child_requisition.height);
 371           requisition->width = MAX (requisition->width,
 372                                     child->x +
 373                                     child_requisition.width);
 374         }
 375     }
 376
 377   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 378   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 379 }
 380
 381 static void
 382 gtk_fixed_size_allocate (GtkWidget     *widget,
 383                          GtkAllocation *allocation)
 384 {
 385   GtkFixed *fixed;
 386   GtkFixedChild *child;
 387   GtkAllocation child_allocation;
 388   GtkRequisition child_requisition;
 389   GList *children;
 390   guint16 border_width;
 391
 392   g_return_if_fail (GTK_IS_FIXED(widget));
 393   g_return_if_fail (allocation != NULL);
 394
 395   fixed = GTK_FIXED (widget);
 396
 397   widget->allocation = *allocation;
 398
 399   if (!GTK_WIDGET_NO_WINDOW (widget))
 400     {
 401       if (GTK_WIDGET_REALIZED (widget))
 402         gdk_window_move_resize (widget->window,
 403                                 allocation->x,
 404                                 allocation->y,
 405                                 allocation->width,
 406                                 allocation->height);
 407     }
 408
 409   border_width = GTK_CONTAINER (fixed)->border_width;
 410
 411   children = fixed->children;
 412   while (children)
 413     {
 414       child = children->data;
 415       children = children->next;
 416
 417       if (GTK_WIDGET_VISIBLE (child->widget))
 418         {
 419           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 420           child_allocation.x = child->x + border_width;
 421           child_allocation.y = child->y + border_width;
 422
 423           if (GTK_WIDGET_NO_WINDOW (widget))
 424             {
 425               child_allocation.x += widget->allocation.x;
 426               child_allocation.y += widget->allocation.y;
 427             }
 428
 429           child_allocation.width = child_requisition.width;
 430           child_allocation.height = child_requisition.height;
 431           gtk_widget_size_allocate (child->widget, &child_allocation);
 432         }
 433     }
 434 }
 435
 436 static void
 437 gtk_fixed_add (GtkContainer *container,
 438                GtkWidget    *widget)
 439 {
 440   g_return_if_fail (GTK_IS_FIXED (container));
 441   g_return_if_fail (widget != NULL);
 442
 443   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 444 }
 445
 446 static void
 447 gtk_fixed_remove (GtkContainer *container,
 448                   GtkWidget    *widget)
 449 {
 450   GtkFixed *fixed;
 451   GtkFixedChild *child;
 452   GList *children;
 453
 454   g_return_if_fail (GTK_IS_FIXED (container));
 455   g_return_if_fail (widget != NULL);
 456
 457   fixed = GTK_FIXED (container);
 458
 459   children = fixed->children;
 460   while (children)
 461     {
 462       child = children->data;
 463
 464       if (child->widget == widget)
 465         {
 466           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 467
 468           gtk_widget_unparent (widget);
 469
 470           fixed->children = g_list_remove_link (fixed->children, children);
 471           g_list_free (children);
 472           g_free (child);
 473
 474           if (was_visible && GTK_WIDGET_VISIBLE (container))
 475             gtk_widget_queue_resize (GTK_WIDGET (container));
 476
 477           break;
 478         }
 479
 480       children = children->next;
 481     }
 482 }
 483
 484 static void
 485 gtk_fixed_forall (GtkContainer *container,
 486                   gboolean      include_internals,
 487                   GtkCallback   callback,
 488                   gpointer      callback_data)
 489 {
 490   GtkFixed *fixed;
 491   GtkFixedChild *child;
 492   GList *children;
 493
 494   g_return_if_fail (GTK_IS_FIXED (container));
 495   g_return_if_fail (callback != NULL);
 496
 497   fixed = GTK_FIXED (container);
 498
 499   children = fixed->children;
 500   while (children)
 501     {
 502       child = children->data;
 503       children = children->next;
 504
 505       (* callback) (child->widget, callback_data);
 506     }
 507 }
 508
 509 /**
 510  * gtk_fixed_set_has_window:
 511  * @fixed: a #GtkFixed
 512  * @has_window: %TRUE if a separate window should be created
 513  *
 514  * Sets whether a #GtkFixed widget is created with a separate
 515  * #GdkWindow for widget->window or not. (By default, it will be
 516  * created with no separate #GdkWindow). This function must be called
 517  * while the #GtkFixed is not realized, for instance, immediately after the
 518  * window is created.
 519  **/
 520 void
 521 gtk_fixed_set_has_window (GtkFixed *fixed,
 522                           gboolean  has_window)
 523 {
 524   g_return_if_fail (GTK_IS_FIXED (fixed));
 525   g_return_if_fail (!GTK_WIDGET_REALIZED (fixed));
 526
 527   if (!has_window != GTK_WIDGET_NO_WINDOW (fixed))
 528     {
 529       if (has_window)
 530         GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 531       else
 532         GTK_WIDGET_SET_FLAGS (fixed, GTK_NO_WINDOW);
 533     }
 534 }
 535
 536 /**
 537  * gtk_fixed_get_has_window:
 538  * @fixed: a #GtkWidget
 539  *
 540  * Gets whether the #GtkFixed has it's own #GdkWindow.
 541  * See gdk_fixed_set_has_window().
 542  *
 543  * Return value: %TRUE if @fixed has its own window.
 544  **/
 545 gboolean
 546 gtk_fixed_get_has_window (GtkFixed *fixed)
 547 {
 548   g_return_val_if_fail (GTK_IS_FIXED (fixed), FALSE);
 549
 550   return !GTK_WIDGET_NO_WINDOW (fixed);
 551 }