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 "config.h"
  28
  29 #include "gtkfixed.h"
  30
  31 #include "gtkprivate.h"
  32 #include "gtkintl.h"
  33
  34
  35 struct _GtkFixedPrivate
  36 {
  37   GList *children;
  38 };
  39
  40 enum {
  41   CHILD_PROP_0,
  42   CHILD_PROP_X,
  43   CHILD_PROP_Y
  44 };
  45
  46 static void gtk_fixed_realize       (GtkWidget        *widget);
  47 static void gtk_fixed_get_preferred_width  (GtkWidget *widget,
  48                                             gint      *minimum,
  49                                             gint      *natural);
  50 static void gtk_fixed_get_preferred_height (GtkWidget *widget,
  51                                             gint      *minimum,
  52                                             gint      *natural);
  53 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  54                                      GtkAllocation    *allocation);
  55 static void gtk_fixed_add           (GtkContainer     *container,
  56                                      GtkWidget        *widget);
  57 static void gtk_fixed_remove        (GtkContainer     *container,
  58                                      GtkWidget        *widget);
  59 static void gtk_fixed_forall        (GtkContainer     *container,
  60                                      gboolean          include_internals,
  61                                      GtkCallback       callback,
  62                                      gpointer          callback_data);
  63 static GType gtk_fixed_child_type   (GtkContainer     *container);
  64
  65 static void gtk_fixed_set_child_property (GtkContainer *container,
  66                                           GtkWidget    *child,
  67                                           guint         property_id,
  68                                           const GValue *value,
  69                                           GParamSpec   *pspec);
  70 static void gtk_fixed_get_child_property (GtkContainer *container,
  71                                           GtkWidget    *child,
  72                                           guint         property_id,
  73                                           GValue       *value,
  74                                           GParamSpec   *pspec);
  75
  76 G_DEFINE_TYPE (GtkFixed, gtk_fixed, GTK_TYPE_CONTAINER)
  77
  78 static void
  79 gtk_fixed_class_init (GtkFixedClass *class)
  80 {
  81   GtkWidgetClass *widget_class;
  82   GtkContainerClass *container_class;
  83
  84   widget_class = (GtkWidgetClass*) class;
  85   container_class = (GtkContainerClass*) class;
  86
  87   widget_class->realize = gtk_fixed_realize;
  88   widget_class->get_preferred_width = gtk_fixed_get_preferred_width;
  89   widget_class->get_preferred_height = gtk_fixed_get_preferred_height;
  90   widget_class->size_allocate = gtk_fixed_size_allocate;
  91
  92   container_class->add = gtk_fixed_add;
  93   container_class->remove = gtk_fixed_remove;
  94   container_class->forall = gtk_fixed_forall;
  95   container_class->child_type = gtk_fixed_child_type;
  96   container_class->set_child_property = gtk_fixed_set_child_property;
  97   container_class->get_child_property = gtk_fixed_get_child_property;
  98   gtk_container_class_handle_border_width (container_class);
  99
 100   gtk_container_class_install_child_property (container_class,
 101                                               CHILD_PROP_X,
 102                                               g_param_spec_int ("x",
 103                                                                 P_("X position"),
 104                                                                 P_("X position of child widget"),
 105                                                                 G_MININT, G_MAXINT, 0,
 106                                                                 GTK_PARAM_READWRITE));
 107
 108   gtk_container_class_install_child_property (container_class,
 109                                               CHILD_PROP_Y,
 110                                               g_param_spec_int ("y",
 111                                                                 P_("Y position"),
 112                                                                 P_("Y position of child widget"),
 113                                                                 G_MININT, G_MAXINT, 0,
 114                                                                 GTK_PARAM_READWRITE));
 115
 116   g_type_class_add_private (class, sizeof (GtkFixedPrivate));
 117 }
 118
 119 static GType
 120 gtk_fixed_child_type (GtkContainer *container)
 121 {
 122   return GTK_TYPE_WIDGET;
 123 }
 124
 125 static void
 126 gtk_fixed_init (GtkFixed *fixed)
 127 {
 128   fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed, GTK_TYPE_FIXED, GtkFixedPrivate);
 129
 130   gtk_widget_set_has_window (GTK_WIDGET (fixed), FALSE);
 131
 132   fixed->priv->children = NULL;
 133 }
 134
 135 GtkWidget*
 136 gtk_fixed_new (void)
 137 {
 138   return g_object_new (GTK_TYPE_FIXED, NULL);
 139 }
 140
 141 static GtkFixedChild*
 142 get_child (GtkFixed  *fixed,
 143            GtkWidget *widget)
 144 {
 145   GtkFixedPrivate *priv = fixed->priv;
 146   GList *children;
 147
 148   for (children = priv->children; children; children = children->next)
 149     {
 150       GtkFixedChild *child;
 151
 152       child = children->data;
 153
 154       if (child->widget == widget)
 155         return child;
 156     }
 157
 158   return NULL;
 159 }
 160
 161 void
 162 gtk_fixed_put (GtkFixed  *fixed,
 163                GtkWidget *widget,
 164                gint       x,
 165                gint       y)
 166 {
 167   GtkFixedPrivate *priv = fixed->priv;
 168   GtkFixedChild *child_info;
 169
 170   g_return_if_fail (GTK_IS_FIXED (fixed));
 171   g_return_if_fail (GTK_IS_WIDGET (widget));
 172
 173   child_info = g_new (GtkFixedChild, 1);
 174   child_info->widget = widget;
 175   child_info->x = x;
 176   child_info->y = y;
 177
 178   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 179
 180   priv->children = g_list_append (priv->children, child_info);
 181 }
 182
 183 static void
 184 gtk_fixed_move_internal (GtkFixed      *fixed,
 185                          GtkFixedChild *child,
 186                          gint           x,
 187                          gint           y)
 188 {
 189   g_return_if_fail (GTK_IS_FIXED (fixed));
 190   g_return_if_fail (gtk_widget_get_parent (child->widget) == GTK_WIDGET (fixed));
 191
 192   gtk_widget_freeze_child_notify (child->widget);
 193
 194   if (child->x != x)
 195     {
 196       child->x = x;
 197       gtk_widget_child_notify (child->widget, "x");
 198     }
 199
 200   if (child->y != y)
 201     {
 202       child->y = y;
 203       gtk_widget_child_notify (child->widget, "y");
 204     }
 205
 206   gtk_widget_thaw_child_notify (child->widget);
 207
 208   if (gtk_widget_get_visible (child->widget) &&
 209       gtk_widget_get_visible (GTK_WIDGET (fixed)))
 210     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 211 }
 212
 213 void
 214 gtk_fixed_move (GtkFixed  *fixed,
 215                 GtkWidget *widget,
 216                 gint       x,
 217                 gint       y)
 218 {
 219   gtk_fixed_move_internal (fixed, get_child (fixed, widget), x, y);
 220 }
 221
 222 static void
 223 gtk_fixed_set_child_property (GtkContainer *container,
 224                               GtkWidget    *child,
 225                               guint         property_id,
 226                               const GValue *value,
 227                               GParamSpec   *pspec)
 228 {
 229   GtkFixed *fixed = GTK_FIXED (container);
 230   GtkFixedChild *fixed_child;
 231
 232   fixed_child = get_child (fixed, child);
 233
 234   switch (property_id)
 235     {
 236     case CHILD_PROP_X:
 237       gtk_fixed_move_internal (fixed,
 238                                fixed_child,
 239                                g_value_get_int (value),
 240                                fixed_child->y);
 241       break;
 242     case CHILD_PROP_Y:
 243       gtk_fixed_move_internal (fixed,
 244                                fixed_child,
 245                                fixed_child->x,
 246                                g_value_get_int (value));
 247       break;
 248     default:
 249       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 250       break;
 251     }
 252 }
 253
 254 static void
 255 gtk_fixed_get_child_property (GtkContainer *container,
 256                               GtkWidget    *child,
 257                               guint         property_id,
 258                               GValue       *value,
 259                               GParamSpec   *pspec)
 260 {
 261   GtkFixedChild *fixed_child;
 262
 263   fixed_child = get_child (GTK_FIXED (container), child);
 264
 265   switch (property_id)
 266     {
 267     case CHILD_PROP_X:
 268       g_value_set_int (value, fixed_child->x);
 269       break;
 270     case CHILD_PROP_Y:
 271       g_value_set_int (value, fixed_child->y);
 272       break;
 273     default:
 274       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 275       break;
 276     }
 277 }
 278
 279 static void
 280 gtk_fixed_realize (GtkWidget *widget)
 281 {
 282   GtkAllocation allocation;
 283   GdkWindow *window;
 284   GdkWindowAttr attributes;
 285   gint attributes_mask;
 286
 287   if (!gtk_widget_get_has_window (widget))
 288     GTK_WIDGET_CLASS (gtk_fixed_parent_class)->realize (widget);
 289   else
 290     {
 291       gtk_widget_set_realized (widget, TRUE);
 292
 293       gtk_widget_get_allocation (widget, &allocation);
 294
 295       attributes.window_type = GDK_WINDOW_CHILD;
 296       attributes.x = allocation.x;
 297       attributes.y = allocation.y;
 298       attributes.width = allocation.width;
 299       attributes.height = allocation.height;
 300       attributes.wclass = GDK_INPUT_OUTPUT;
 301       attributes.visual = gtk_widget_get_visual (widget);
 302       attributes.event_mask = gtk_widget_get_events (widget);
 303       attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 304
 305       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
 306
 307       window = gdk_window_new (gtk_widget_get_parent_window (widget),
 308                                &attributes, attributes_mask);
 309       gtk_widget_set_window (widget, window);
 310       gdk_window_set_user_data (window, widget);
 311
 312       gtk_style_context_set_background (gtk_widget_get_style_context (widget),
 313                                         window);
 314     }
 315 }
 316
 317 static void
 318 gtk_fixed_get_preferred_width (GtkWidget *widget,
 319                                gint      *minimum,
 320                                gint      *natural)
 321 {
 322   GtkFixed *fixed = GTK_FIXED (widget);
 323   GtkFixedPrivate *priv = fixed->priv;
 324   GtkFixedChild *child;
 325   GList *children;
 326   gint child_min, child_nat;
 327
 328   *minimum = 0;
 329   *natural = 0;
 330
 331   for (children = priv->children; children; children = children->next)
 332     {
 333       child = children->data;
 334
 335       if (!gtk_widget_get_visible (child->widget))
 336         continue;
 337
 338       gtk_widget_get_preferred_width (child->widget, &child_min, &child_nat);
 339
 340       *minimum = MAX (*minimum, child->x + child_min);
 341       *natural = MAX (*natural, child->x + child_nat);
 342     }
 343 }
 344
 345 static void
 346 gtk_fixed_get_preferred_height (GtkWidget *widget,
 347                                 gint      *minimum,
 348                                 gint      *natural)
 349 {
 350   GtkFixed *fixed = GTK_FIXED (widget);
 351   GtkFixedPrivate *priv = fixed->priv;
 352   GtkFixedChild *child;
 353   GList *children;
 354   gint child_min, child_nat;
 355
 356   *minimum = 0;
 357   *natural = 0;
 358
 359   for (children = priv->children; children; children = children->next)
 360     {
 361       child = children->data;
 362
 363       if (!gtk_widget_get_visible (child->widget))
 364         continue;
 365
 366       gtk_widget_get_preferred_height (child->widget, &child_min, &child_nat);
 367
 368       *minimum = MAX (*minimum, child->y + child_min);
 369       *natural = MAX (*natural, child->y + child_nat);
 370     }
 371 }
 372
 373 static void
 374 gtk_fixed_size_allocate (GtkWidget     *widget,
 375                          GtkAllocation *allocation)
 376 {
 377   GtkFixed *fixed = GTK_FIXED (widget);
 378   GtkFixedPrivate *priv = fixed->priv;
 379   GtkFixedChild *child;
 380   GtkAllocation child_allocation;
 381   GtkRequisition child_requisition;
 382   GList *children;
 383
 384   gtk_widget_set_allocation (widget, allocation);
 385
 386   if (gtk_widget_get_has_window (widget))
 387     {
 388       if (gtk_widget_get_realized (widget))
 389         gdk_window_move_resize (gtk_widget_get_window (widget),
 390                                 allocation->x,
 391                                 allocation->y,
 392                                 allocation->width,
 393                                 allocation->height);
 394     }
 395
 396   for (children = priv->children; children; children = children->next)
 397     {
 398       child = children->data;
 399
 400       if (!gtk_widget_get_visible (child->widget))
 401         continue;
 402
 403       gtk_widget_get_preferred_size (child->widget, &child_requisition, NULL);
 404       child_allocation.x = child->x;
 405       child_allocation.y = child->y;
 406
 407       if (!gtk_widget_get_has_window (widget))
 408         {
 409           child_allocation.x += allocation->x;
 410           child_allocation.y += allocation->y;
 411         }
 412
 413       child_allocation.width = child_requisition.width;
 414       child_allocation.height = child_requisition.height;
 415       gtk_widget_size_allocate (child->widget, &child_allocation);
 416     }
 417 }
 418
 419 static void
 420 gtk_fixed_add (GtkContainer *container,
 421                GtkWidget    *widget)
 422 {
 423   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 424 }
 425
 426 static void
 427 gtk_fixed_remove (GtkContainer *container,
 428                   GtkWidget    *widget)
 429 {
 430   GtkFixed *fixed = GTK_FIXED (container);
 431   GtkFixedPrivate *priv = fixed->priv;
 432   GtkFixedChild *child;
 433   GtkWidget *widget_container = GTK_WIDGET (container);
 434   GList *children;
 435
 436   for (children = priv->children; children; children = children->next)
 437     {
 438       child = children->data;
 439
 440       if (child->widget == widget)
 441         {
 442           gboolean was_visible = gtk_widget_get_visible (widget);
 443
 444           gtk_widget_unparent (widget);
 445
 446           priv->children = g_list_remove_link (priv->children, children);
 447           g_list_free (children);
 448           g_free (child);
 449
 450           if (was_visible && gtk_widget_get_visible (widget_container))
 451             gtk_widget_queue_resize (widget_container);
 452
 453           break;
 454         }
 455
 456       children = children->next;
 457     }
 458 }
 459
 460 static void
 461 gtk_fixed_forall (GtkContainer *container,
 462                   gboolean      include_internals,
 463                   GtkCallback   callback,
 464                   gpointer      callback_data)
 465 {
 466   GtkFixed *fixed = GTK_FIXED (container);
 467   GtkFixedPrivate *priv = fixed->priv;
 468   GtkFixedChild *child;
 469   GList *children;
 470
 471   for (children = priv->children; children; children = children->next)
 472     {
 473       child = children->data;
 474
 475       (* callback) (child->widget, callback_data);
 476     }
 477 }