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 GType 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 GType
  68 gtk_fixed_get_type (void)
  69 {
  70   static GType fixed_type = 0;
  71
  72   if (!fixed_type)
  73     {
  74       static const GTypeInfo fixed_info =
  75       {
  76         sizeof (GtkFixedClass),
  77         NULL,           /* base_init */
  78         NULL,           /* base_finalize */
  79         (GClassInitFunc) gtk_fixed_class_init,
  80         NULL,           /* class_finalize */
  81         NULL,           /* class_data */
  82         sizeof (GtkFixed),
  83         0,              /* n_preallocs */
  84         (GInstanceInitFunc) gtk_fixed_init,
  85       };
  86
  87       fixed_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkFixed",
  88                                            &fixed_info, 0);
  89     }
  90
  91   return fixed_type;
  92 }
  93
  94 static void
  95 gtk_fixed_class_init (GtkFixedClass *class)
  96 {
  97   GtkWidgetClass *widget_class;
  98   GtkContainerClass *container_class;
  99
 100   widget_class = (GtkWidgetClass*) class;
 101   container_class = (GtkContainerClass*) class;
 102
 103   parent_class = g_type_class_peek_parent (class);
 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                                                                 P_("X position"),
 121                                                                 P_("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                                                                 P_("Y position"),
 131                                                                 P_("Y position of child widget"),
 132                                                                 G_MININT,
 133                                                                 G_MAXINT,
 134                                                                 0,
 135                                                                 G_PARAM_READWRITE));
 136 }
 137
 138 static GType
 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   return g_object_new (GTK_TYPE_FIXED, NULL);
 156 }
 157
 158 static GtkFixedChild*
 159 get_child (GtkFixed  *fixed,
 160            GtkWidget *widget)
 161 {
 162   GList *children;
 163
 164   children = fixed->children;
 165   while (children)
 166     {
 167       GtkFixedChild *child;
 168
 169       child = children->data;
 170       children = children->next;
 171
 172       if (child->widget == widget)
 173         return child;
 174     }
 175
 176   return NULL;
 177 }
 178
 179 void
 180 gtk_fixed_put (GtkFixed       *fixed,
 181                GtkWidget      *widget,
 182                gint            x,
 183                gint            y)
 184 {
 185   GtkFixedChild *child_info;
 186
 187   g_return_if_fail (GTK_IS_FIXED (fixed));
 188   g_return_if_fail (GTK_IS_WIDGET (fixed));
 189
 190   child_info = g_new (GtkFixedChild, 1);
 191   child_info->widget = widget;
 192   child_info->x = x;
 193   child_info->y = y;
 194
 195   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 196
 197   fixed->children = g_list_append (fixed->children, child_info);
 198 }
 199
 200 static void
 201 gtk_fixed_move_internal (GtkFixed       *fixed,
 202                          GtkWidget      *widget,
 203                          gboolean        change_x,
 204                          gint            x,
 205                          gboolean        change_y,
 206                          gint            y)
 207 {
 208   GtkFixedChild *child;
 209
 210   g_return_if_fail (GTK_IS_FIXED (fixed));
 211   g_return_if_fail (GTK_IS_WIDGET (widget));
 212   g_return_if_fail (widget->parent == GTK_WIDGET (fixed));
 213
 214   child = get_child (fixed, widget);
 215
 216   g_assert (child);
 217
 218   gtk_widget_freeze_child_notify (widget);
 219
 220   if (change_x)
 221     {
 222       child->x = x;
 223       gtk_widget_child_notify (widget, "x");
 224     }
 225
 226   if (change_y)
 227     {
 228       child->y = y;
 229       gtk_widget_child_notify (widget, "y");
 230     }
 231
 232   gtk_widget_thaw_child_notify (widget);
 233
 234   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 235     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 236 }
 237
 238 void
 239 gtk_fixed_move (GtkFixed       *fixed,
 240                 GtkWidget      *widget,
 241                 gint            x,
 242                 gint            y)
 243 {
 244   gtk_fixed_move_internal (fixed, widget, TRUE, x, TRUE, y);
 245 }
 246
 247 static void
 248 gtk_fixed_set_child_property (GtkContainer    *container,
 249                               GtkWidget       *child,
 250                               guint            property_id,
 251                               const GValue    *value,
 252                               GParamSpec      *pspec)
 253 {
 254   switch (property_id)
 255     {
 256     case CHILD_PROP_X:
 257       gtk_fixed_move_internal (GTK_FIXED (container),
 258                                child,
 259                                TRUE, g_value_get_int (value),
 260                                FALSE, 0);
 261       break;
 262     case CHILD_PROP_Y:
 263       gtk_fixed_move_internal (GTK_FIXED (container),
 264                                child,
 265                                FALSE, 0,
 266                                TRUE, g_value_get_int (value));
 267       break;
 268     default:
 269       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 270       break;
 271     }
 272 }
 273
 274 static void
 275 gtk_fixed_get_child_property (GtkContainer *container,
 276                               GtkWidget    *child,
 277                               guint         property_id,
 278                               GValue       *value,
 279                               GParamSpec   *pspec)
 280 {
 281   GtkFixedChild *fixed_child;
 282
 283   fixed_child = get_child (GTK_FIXED (container), child);
 284
 285   switch (property_id)
 286     {
 287     case CHILD_PROP_X:
 288       g_value_set_int (value, fixed_child->x);
 289       break;
 290     case CHILD_PROP_Y:
 291       g_value_set_int (value, fixed_child->y);
 292       break;
 293     default:
 294       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 295       break;
 296     }
 297 }
 298
 299 static void
 300 gtk_fixed_realize (GtkWidget *widget)
 301 {
 302   GdkWindowAttr attributes;
 303   gint attributes_mask;
 304
 305   if (GTK_WIDGET_NO_WINDOW (widget))
 306     GTK_WIDGET_CLASS (parent_class)->realize (widget);
 307   else
 308     {
 309       GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 310
 311       attributes.window_type = GDK_WINDOW_CHILD;
 312       attributes.x = widget->allocation.x;
 313       attributes.y = widget->allocation.y;
 314       attributes.width = widget->allocation.width;
 315       attributes.height = widget->allocation.height;
 316       attributes.wclass = GDK_INPUT_OUTPUT;
 317       attributes.visual = gtk_widget_get_visual (widget);
 318       attributes.colormap = gtk_widget_get_colormap (widget);
 319       attributes.event_mask = gtk_widget_get_events (widget);
 320       attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 321
 322       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 323
 324       widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 325                                        attributes_mask);
 326       gdk_window_set_user_data (widget->window, widget);
 327
 328       widget->style = gtk_style_attach (widget->style, widget->window);
 329       gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 330     }
 331 }
 332
 333 static void
 334 gtk_fixed_size_request (GtkWidget      *widget,
 335                         GtkRequisition *requisition)
 336 {
 337   GtkFixed *fixed;
 338   GtkFixedChild *child;
 339   GList *children;
 340   GtkRequisition child_requisition;
 341
 342   fixed = GTK_FIXED (widget);
 343   requisition->width = 0;
 344   requisition->height = 0;
 345
 346   children = fixed->children;
 347   while (children)
 348     {
 349       child = children->data;
 350       children = children->next;
 351
 352       if (GTK_WIDGET_VISIBLE (child->widget))
 353         {
 354           gtk_widget_size_request (child->widget, &child_requisition);
 355
 356           requisition->height = MAX (requisition->height,
 357                                      child->y +
 358                                      child_requisition.height);
 359           requisition->width = MAX (requisition->width,
 360                                     child->x +
 361                                     child_requisition.width);
 362         }
 363     }
 364
 365   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 366   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 367 }
 368
 369 static void
 370 gtk_fixed_size_allocate (GtkWidget     *widget,
 371                          GtkAllocation *allocation)
 372 {
 373   GtkFixed *fixed;
 374   GtkFixedChild *child;
 375   GtkAllocation child_allocation;
 376   GtkRequisition child_requisition;
 377   GList *children;
 378   guint16 border_width;
 379
 380   fixed = GTK_FIXED (widget);
 381
 382   widget->allocation = *allocation;
 383
 384   if (!GTK_WIDGET_NO_WINDOW (widget))
 385     {
 386       if (GTK_WIDGET_REALIZED (widget))
 387         gdk_window_move_resize (widget->window,
 388                                 allocation->x,
 389                                 allocation->y,
 390                                 allocation->width,
 391                                 allocation->height);
 392     }
 393
 394   border_width = GTK_CONTAINER (fixed)->border_width;
 395
 396   children = fixed->children;
 397   while (children)
 398     {
 399       child = children->data;
 400       children = children->next;
 401
 402       if (GTK_WIDGET_VISIBLE (child->widget))
 403         {
 404           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 405           child_allocation.x = child->x + border_width;
 406           child_allocation.y = child->y + border_width;
 407
 408           if (GTK_WIDGET_NO_WINDOW (widget))
 409             {
 410               child_allocation.x += widget->allocation.x;
 411               child_allocation.y += widget->allocation.y;
 412             }
 413
 414           child_allocation.width = child_requisition.width;
 415           child_allocation.height = child_requisition.height;
 416           gtk_widget_size_allocate (child->widget, &child_allocation);
 417         }
 418     }
 419 }
 420
 421 static void
 422 gtk_fixed_add (GtkContainer *container,
 423                GtkWidget    *widget)
 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   fixed = GTK_FIXED (container);
 437
 438   children = fixed->children;
 439   while (children)
 440     {
 441       child = children->data;
 442
 443       if (child->widget == widget)
 444         {
 445           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 446
 447           gtk_widget_unparent (widget);
 448
 449           fixed->children = g_list_remove_link (fixed->children, children);
 450           g_list_free (children);
 451           g_free (child);
 452
 453           if (was_visible && GTK_WIDGET_VISIBLE (container))
 454             gtk_widget_queue_resize (GTK_WIDGET (container));
 455
 456           break;
 457         }
 458
 459       children = children->next;
 460     }
 461 }
 462
 463 static void
 464 gtk_fixed_forall (GtkContainer *container,
 465                   gboolean      include_internals,
 466                   GtkCallback   callback,
 467                   gpointer      callback_data)
 468 {
 469   GtkFixed *fixed;
 470   GtkFixedChild *child;
 471   GList *children;
 472
 473   g_return_if_fail (callback != NULL);
 474
 475   fixed = GTK_FIXED (container);
 476
 477   children = fixed->children;
 478   while (children)
 479     {
 480       child = children->data;
 481       children = children->next;
 482
 483       (* callback) (child->widget, callback_data);
 484     }
 485 }
 486
 487 /**
 488  * gtk_fixed_set_has_window:
 489  * @fixed: a #GtkFixed
 490  * @has_window: %TRUE if a separate window should be created
 491  *
 492  * Sets whether a #GtkFixed widget is created with a separate
 493  * #GdkWindow for widget->window or not. (By default, it will be
 494  * created with no separate #GdkWindow). This function must be called
 495  * while the #GtkFixed is not realized, for instance, immediately after the
 496  * window is created.
 497  **/
 498 void
 499 gtk_fixed_set_has_window (GtkFixed *fixed,
 500                           gboolean  has_window)
 501 {
 502   g_return_if_fail (GTK_IS_FIXED (fixed));
 503   g_return_if_fail (!GTK_WIDGET_REALIZED (fixed));
 504
 505   if (!has_window != GTK_WIDGET_NO_WINDOW (fixed))
 506     {
 507       if (has_window)
 508         GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 509       else
 510         GTK_WIDGET_SET_FLAGS (fixed, GTK_NO_WINDOW);
 511     }
 512 }
 513
 514 /**
 515  * gtk_fixed_get_has_window:
 516  * @fixed: a #GtkWidget
 517  *
 518  * Gets whether the #GtkFixed has its own #GdkWindow.
 519  * See gdk_fixed_set_has_window().
 520  *
 521  * Return value: %TRUE if @fixed has its own window.
 522  **/
 523 gboolean
 524 gtk_fixed_get_has_window (GtkFixed *fixed)
 525 {
 526   g_return_val_if_fail (GTK_IS_FIXED (fixed), FALSE);
 527
 528   return !GTK_WIDGET_NO_WINDOW (fixed);
 529 }