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