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 #include "gtkfixed.h"
  29 #include "gtkprivate.h"
  30 #include "gtkintl.h"
  31
  32
  33 struct _GtkFixedPriv
  34 {
  35   GList *children;
  36 };
  37
  38 enum {
  39   CHILD_PROP_0,
  40   CHILD_PROP_X,
  41   CHILD_PROP_Y
  42 };
  43
  44 static void gtk_fixed_realize       (GtkWidget        *widget);
  45 static void gtk_fixed_size_request  (GtkWidget        *widget,
  46                                      GtkRequisition   *requisition);
  47 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  48                                      GtkAllocation    *allocation);
  49 static void gtk_fixed_add           (GtkContainer     *container,
  50                                      GtkWidget        *widget);
  51 static void gtk_fixed_remove        (GtkContainer     *container,
  52                                      GtkWidget        *widget);
  53 static void gtk_fixed_forall        (GtkContainer     *container,
  54                                      gboolean          include_internals,
  55                                      GtkCallback       callback,
  56                                      gpointer          callback_data);
  57 static GType gtk_fixed_child_type   (GtkContainer     *container);
  58
  59 static void gtk_fixed_set_child_property (GtkContainer *container,
  60                                           GtkWidget    *child,
  61                                           guint         property_id,
  62                                           const GValue *value,
  63                                           GParamSpec   *pspec);
  64 static void gtk_fixed_get_child_property (GtkContainer *container,
  65                                           GtkWidget    *child,
  66                                           guint         property_id,
  67                                           GValue       *value,
  68                                           GParamSpec   *pspec);
  69
  70 G_DEFINE_TYPE (GtkFixed, gtk_fixed, GTK_TYPE_CONTAINER)
  71
  72 static void
  73 gtk_fixed_class_init (GtkFixedClass *class)
  74 {
  75   GtkWidgetClass *widget_class;
  76   GtkContainerClass *container_class;
  77
  78   widget_class = (GtkWidgetClass*) class;
  79   container_class = (GtkContainerClass*) class;
  80
  81   widget_class->realize = gtk_fixed_realize;
  82   widget_class->size_request = gtk_fixed_size_request;
  83   widget_class->size_allocate = gtk_fixed_size_allocate;
  84
  85   container_class->add = gtk_fixed_add;
  86   container_class->remove = gtk_fixed_remove;
  87   container_class->forall = gtk_fixed_forall;
  88   container_class->child_type = gtk_fixed_child_type;
  89
  90   container_class->set_child_property = gtk_fixed_set_child_property;
  91   container_class->get_child_property = gtk_fixed_get_child_property;
  92
  93   gtk_container_class_install_child_property (container_class,
  94                                               CHILD_PROP_X,
  95                                               g_param_spec_int ("x",
  96                                                                 P_("X position"),
  97                                                                 P_("X position of child widget"),
  98                                                                 G_MININT,
  99                                                                 G_MAXINT,
 100                                                                 0,
 101                                                                 GTK_PARAM_READWRITE));
 102
 103   gtk_container_class_install_child_property (container_class,
 104                                               CHILD_PROP_Y,
 105                                               g_param_spec_int ("y",
 106                                                                 P_("Y position"),
 107                                                                 P_("Y position of child widget"),
 108                                                                 G_MININT,
 109                                                                 G_MAXINT,
 110                                                                 0,
 111                                                                 GTK_PARAM_READWRITE));
 112
 113   g_type_class_add_private (class, sizeof (GtkFixedPriv));
 114 }
 115
 116 static GType
 117 gtk_fixed_child_type (GtkContainer     *container)
 118 {
 119   return GTK_TYPE_WIDGET;
 120 }
 121
 122 static void
 123 gtk_fixed_init (GtkFixed *fixed)
 124 {
 125   GtkFixedPriv *priv;
 126
 127   fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed,
 128                                              GTK_TYPE_FIXED,
 129                                              GtkFixedPriv);
 130   priv = fixed->priv;
 131
 132   gtk_widget_set_has_window (GTK_WIDGET (fixed), FALSE);
 133
 134   priv->children = NULL;
 135 }
 136
 137 GtkWidget*
 138 gtk_fixed_new (void)
 139 {
 140   return g_object_new (GTK_TYPE_FIXED, NULL);
 141 }
 142
 143 static GtkFixedChild*
 144 get_child (GtkFixed  *fixed,
 145            GtkWidget *widget)
 146 {
 147   GtkFixedPriv *priv = fixed->priv;
 148   GList *children;
 149
 150   children = priv->children;
 151   while (children)
 152     {
 153       GtkFixedChild *child;
 154
 155       child = children->data;
 156       children = children->next;
 157
 158       if (child->widget == widget)
 159         return child;
 160     }
 161
 162   return NULL;
 163 }
 164
 165 void
 166 gtk_fixed_put (GtkFixed       *fixed,
 167                GtkWidget      *widget,
 168                gint            x,
 169                gint            y)
 170 {
 171   GtkFixedPriv *priv = fixed->priv;
 172   GtkFixedChild *child_info;
 173
 174   g_return_if_fail (GTK_IS_FIXED (fixed));
 175   g_return_if_fail (GTK_IS_WIDGET (widget));
 176
 177   child_info = g_new (GtkFixedChild, 1);
 178   child_info->widget = widget;
 179   child_info->x = x;
 180   child_info->y = y;
 181
 182   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 183
 184   priv->children = g_list_append (priv->children, child_info);
 185 }
 186
 187 static void
 188 gtk_fixed_move_internal (GtkFixed       *fixed,
 189                          GtkWidget      *widget,
 190                          gboolean        change_x,
 191                          gint            x,
 192                          gboolean        change_y,
 193                          gint            y)
 194 {
 195   GtkFixedChild *child;
 196
 197   g_return_if_fail (GTK_IS_FIXED (fixed));
 198   g_return_if_fail (GTK_IS_WIDGET (widget));
 199   g_return_if_fail (widget->parent == GTK_WIDGET (fixed));
 200
 201   child = get_child (fixed, widget);
 202
 203   g_assert (child);
 204
 205   gtk_widget_freeze_child_notify (widget);
 206
 207   if (change_x)
 208     {
 209       child->x = x;
 210       gtk_widget_child_notify (widget, "x");
 211     }
 212
 213   if (change_y)
 214     {
 215       child->y = y;
 216       gtk_widget_child_notify (widget, "y");
 217     }
 218
 219   gtk_widget_thaw_child_notify (widget);
 220
 221   if (gtk_widget_get_visible (widget) &&
 222       gtk_widget_get_visible (GTK_WIDGET (fixed)))
 223     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 224 }
 225
 226 void
 227 gtk_fixed_move (GtkFixed       *fixed,
 228                 GtkWidget      *widget,
 229                 gint            x,
 230                 gint            y)
 231 {
 232   gtk_fixed_move_internal (fixed, widget, TRUE, x, TRUE, y);
 233 }
 234
 235 static void
 236 gtk_fixed_set_child_property (GtkContainer    *container,
 237                               GtkWidget       *child,
 238                               guint            property_id,
 239                               const GValue    *value,
 240                               GParamSpec      *pspec)
 241 {
 242   switch (property_id)
 243     {
 244     case CHILD_PROP_X:
 245       gtk_fixed_move_internal (GTK_FIXED (container),
 246                                child,
 247                                TRUE, g_value_get_int (value),
 248                                FALSE, 0);
 249       break;
 250     case CHILD_PROP_Y:
 251       gtk_fixed_move_internal (GTK_FIXED (container),
 252                                child,
 253                                FALSE, 0,
 254                                TRUE, g_value_get_int (value));
 255       break;
 256     default:
 257       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 258       break;
 259     }
 260 }
 261
 262 static void
 263 gtk_fixed_get_child_property (GtkContainer *container,
 264                               GtkWidget    *child,
 265                               guint         property_id,
 266                               GValue       *value,
 267                               GParamSpec   *pspec)
 268 {
 269   GtkFixedChild *fixed_child;
 270
 271   fixed_child = get_child (GTK_FIXED (container), child);
 272
 273   switch (property_id)
 274     {
 275     case CHILD_PROP_X:
 276       g_value_set_int (value, fixed_child->x);
 277       break;
 278     case CHILD_PROP_Y:
 279       g_value_set_int (value, fixed_child->y);
 280       break;
 281     default:
 282       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 283       break;
 284     }
 285 }
 286
 287 static void
 288 gtk_fixed_realize (GtkWidget *widget)
 289 {
 290   GdkWindowAttr attributes;
 291   gint attributes_mask;
 292
 293   if (!gtk_widget_get_has_window (widget))
 294     GTK_WIDGET_CLASS (gtk_fixed_parent_class)->realize (widget);
 295   else
 296     {
 297       gtk_widget_set_realized (widget, TRUE);
 298
 299       attributes.window_type = GDK_WINDOW_CHILD;
 300       attributes.x = widget->allocation.x;
 301       attributes.y = widget->allocation.y;
 302       attributes.width = widget->allocation.width;
 303       attributes.height = widget->allocation.height;
 304       attributes.wclass = GDK_INPUT_OUTPUT;
 305       attributes.visual = gtk_widget_get_visual (widget);
 306       attributes.colormap = gtk_widget_get_colormap (widget);
 307       attributes.event_mask = gtk_widget_get_events (widget);
 308       attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 309
 310       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 311
 312       widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 313                                        attributes_mask);
 314       gdk_window_set_user_data (widget->window, widget);
 315
 316       widget->style = gtk_style_attach (widget->style, widget->window);
 317       gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 318     }
 319 }
 320
 321 static void
 322 gtk_fixed_size_request (GtkWidget      *widget,
 323                         GtkRequisition *requisition)
 324 {
 325   GtkFixedPriv *priv;
 326   GtkFixed *fixed;
 327   GtkFixedChild *child;
 328   GList *children;
 329   GtkRequisition child_requisition;
 330   guint border_width;
 331
 332   fixed = GTK_FIXED (widget);
 333   priv = fixed->priv;
 334
 335   requisition->width = 0;
 336   requisition->height = 0;
 337
 338   children = priv->children;
 339   while (children)
 340     {
 341       child = children->data;
 342       children = children->next;
 343
 344       if (gtk_widget_get_visible (child->widget))
 345         {
 346           gtk_widget_size_request (child->widget, &child_requisition);
 347
 348           requisition->height = MAX (requisition->height,
 349                                      child->y +
 350                                      child_requisition.height);
 351           requisition->width = MAX (requisition->width,
 352                                     child->x +
 353                                     child_requisition.width);
 354         }
 355     }
 356
 357   border_width = gtk_container_get_border_width (GTK_CONTAINER (fixed));
 358   requisition->height += border_width * 2;
 359   requisition->width += border_width * 2;
 360 }
 361
 362 static void
 363 gtk_fixed_size_allocate (GtkWidget     *widget,
 364                          GtkAllocation *allocation)
 365 {
 366   GtkFixed *fixed = GTK_FIXED (widget);
 367   GtkFixedPriv *priv = fixed->priv;
 368   GtkFixedChild *child;
 369   GtkAllocation child_allocation;
 370   GtkRequisition child_requisition;
 371   GList *children;
 372   guint border_width;
 373
 374   widget->allocation = *allocation;
 375
 376   if (gtk_widget_get_has_window (widget))
 377     {
 378       if (gtk_widget_get_realized (widget))
 379         gdk_window_move_resize (widget->window,
 380                                 allocation->x,
 381                                 allocation->y,
 382                                 allocation->width,
 383                                 allocation->height);
 384     }
 385
 386   border_width = gtk_container_get_border_width (GTK_CONTAINER (fixed));
 387
 388   children = priv->children;
 389   while (children)
 390     {
 391       child = children->data;
 392       children = children->next;
 393
 394       if (gtk_widget_get_visible (child->widget))
 395         {
 396           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 397           child_allocation.x = child->x + border_width;
 398           child_allocation.y = child->y + border_width;
 399
 400           if (!gtk_widget_get_has_window (widget))
 401             {
 402               child_allocation.x += widget->allocation.x;
 403               child_allocation.y += widget->allocation.y;
 404             }
 405
 406           child_allocation.width = child_requisition.width;
 407           child_allocation.height = child_requisition.height;
 408           gtk_widget_size_allocate (child->widget, &child_allocation);
 409         }
 410     }
 411 }
 412
 413 static void
 414 gtk_fixed_add (GtkContainer *container,
 415                GtkWidget    *widget)
 416 {
 417   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 418 }
 419
 420 static void
 421 gtk_fixed_remove (GtkContainer *container,
 422                   GtkWidget    *widget)
 423 {
 424   GtkFixed *fixed = GTK_FIXED (container);
 425   GtkFixedPriv *priv = fixed->priv;
 426   GtkFixedChild *child;
 427   GtkWidget *widget_container = GTK_WIDGET (container);
 428   GList *children;
 429
 430   children = priv->children;
 431   while (children)
 432     {
 433       child = children->data;
 434
 435       if (child->widget == widget)
 436         {
 437           gboolean was_visible = gtk_widget_get_visible (widget);
 438
 439           gtk_widget_unparent (widget);
 440
 441           priv->children = g_list_remove_link (priv->children, children);
 442           g_list_free (children);
 443           g_free (child);
 444
 445           if (was_visible && gtk_widget_get_visible (widget_container))
 446             gtk_widget_queue_resize (widget_container);
 447
 448           break;
 449         }
 450
 451       children = children->next;
 452     }
 453 }
 454
 455 static void
 456 gtk_fixed_forall (GtkContainer *container,
 457                   gboolean      include_internals,
 458                   GtkCallback   callback,
 459                   gpointer      callback_data)
 460 {
 461   GtkFixed *fixed = GTK_FIXED (container);
 462   GtkFixedPriv *priv = fixed->priv;
 463   GtkFixedChild *child;
 464   GList *children;
 465
 466   children = priv->children;
 467   while (children)
 468     {
 469       child = children->data;
 470       children = children->next;
 471
 472       (* callback) (child->widget, callback_data);
 473     }
 474 }