lib/object.h

   1 /* Dia -- an diagram creation/manipulation program -*- c -*-
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 /** @file object.h -- definitions for Dia objects, in particular the 'virtual'
  20  * functions and the object and type structures.
  21  */
  22 #ifndef OBJECT_H
  23 #define OBJECT_H
  24
  25 #include "diatypes.h"
  26 #include <gtk/gtk.h>
  27
  28 #include "geometry.h"
  29 #include "connectionpoint.h"
  30 #include "handle.h"
  31 #include "diamenu.h"
  32 #include "objchange.h"
  33 #include "dia_xml.h"
  34 #include "text.h"
  35
  36 G_BEGIN_DECLS
  37
  38 /** Flags for DiaObject */
  39 /** Set this if the DiaObject can 'contain' other objects that move with
  40  *  it, a.k.a. be a parent.  A parent moves its children along and
  41  *  constricts its children to live inside its borders.
  42  */
  43 #define DIA_OBJECT_CAN_PARENT 1
  44 /** Set this if the DiaObject grabs all input destined for its children.
  45  * This is typically used for group-like objects.
  46  */
  47 #define DIA_OBJECT_GRABS_CHILD_INPUT 2
  48
  49 /** This enumeration gives a bitset of modifier keys currently held down.
  50  */
  51 typedef enum {
  52   MODIFIER_NONE,
  53   MODIFIER_LEFT_SHIFT,
  54   MODIFIER_RIGHT_SHIFT,
  55   MODIFIER_SHIFT,
  56   MODIFIER_LEFT_ALT = 4,
  57   MODIFIER_RIGHT_ALT = 8,
  58   MODIFIER_ALT = 12,
  59   MODIFIER_LEFT_CONTROL = 16,
  60   MODIFIER_RIGHT_CONTROL = 32,
  61   MODIFIER_CONTROL = 48
  62 } ModifierKeys;
  63
  64 /************************************
  65  ** Some general function prototypes
  66  **
  67  ** These are the prototypes for the
  68  ** functions that must be defined for
  69  ** every object we can insert in a
  70  ** diagram.
  71  **
  72  ************************************/
  73
  74 /*** Object type (class) operations ***/
  75
  76 /** Function called to create an object.
  77  *  This function is responsible for allocation memory for the object.
  78  *  This is one of the object class functions.
  79  * @param startpoint : initial position for the object
  80  * @param user_data  : Can be used to pass extra params to the creation
  81  *                of the object. Can be used to have two icons of
  82  *                the same object that are instansiated a bit different.
  83  * @param handle1    : (return) Handle connected to startpoint
  84  * @param handle2    : (return) Handle dragged on creation
  85  *  both handle1 and handle2 can be NULL
  86  * @return A newly created object.
  87 */
  88 typedef DiaObject* (*CreateFunc) (Point *startpoint,
  89                                void *user_data,
  90                                Handle **handle1,
  91                                Handle **handle2);
  92
  93 /** This function load the object's data from file fd. No header has to be
  94  *  skipped. The data should be read using the functions in lib/files.h
  95  *  The memory for the object has to be allocated (see CreateFunc)
  96  *  The version number is the version number of the DiaObjectType that was saved.
  97  *  This must be used to maintain backwards compatible if you change some
  98  *  in the save format. All objects must be capable of reading all earlier
  99  *  version.
 100  *  This is one of the object class functions.
 101  * @param obj_node A node in an XML object to load from.
 102  * @param version The version of the object found in the XML file.
 103  * @param filename The name of the file we're loading from, for use in
 104  *                 error messages.
 105  */
 106 typedef DiaObject* (*LoadFunc) (ObjectNode obj_node, int version,
 107                                 const char *filename);
 108
 109 /** This function save the object's data to file fd. No header is required.
 110  *  The data should be written using the functions in lib/files.h
 111  *  This is one of the object class functions.
 112  * @param obj An object to save.
 113  * @param obj_node An XML node to save it in.
 114  * @param filename The name of the file we're saving to, for use in error
 115  *                 messages.
 116  */
 117 typedef void (*SaveFunc) (DiaObject* obj, ObjectNode obj_node,
 118                           const char *filename);
 119
 120 /** Function called when the user has double clicked on an Tool.
 121  *  When this function is called and the dialog already is created,
 122  *  make sure to update the values in the widgets so that it
 123  *  accurately describes the current state of the tool.
 124  *  This is one of the object class functions.
 125  * @return a dialog that the user can use to edit the defaults for new
 126  * objects of this type.
 127 */
 128 typedef GtkWidget *(*GetDefaultsFunc) ();
 129
 130 /** Function called when the user clicks Apply on an edit defaults dialog.
 131  * This is currently not used by any object.
 132  * This is one of the object class functions.
 133  */
 134 typedef void *(*ApplyDefaultsFunc) ();
 135
 136 /*** Object operations ***/
 137
 138 /** Function called before an object is deleted.
 139  *  This function must call the parent class's DestroyFunc, and then free
 140  *  the memory associated with the object, but not the object itself
 141  *  Must also unconnect itself from all other objects.
 142  *  (This is by calling object_destroy, or letting the super-class call it)
 143  *  This is one of the object_ops functions.
 144  * @param obj An object to destroy.
 145  */
 146 typedef void (*DestroyFunc) (DiaObject* obj);
 147
 148
 149 /** Function responsible for drawing the object.
 150  *  Every drawing must be done through the use of the Renderer, so that we
 151  *  can render the picture on screen, in an eps file, ...
 152  *  This is one of the object_ops functions.
 153  * @param The object to draw.
 154  * @param The renderer object to draw with.
 155  */
 156 typedef void (*DrawFunc) (DiaObject* obj, DiaRenderer* ddisp);
 157
 158
 159 /** This function must return the distance between the DiaObject and the Point.
 160  *  Several functions are provided in geometry.h to facilitate this calculus.
 161  *  This is one of the object_ops functions.
 162  * @param obj The object.
 163  * @param point A point to give the distance to.
 164  * @return The distance from the point to the nearest part of the object.
 165  *         If the point is inside a closed object, return 0.0.
 166  */
 167 typedef real (*DistanceFunc) (DiaObject* obj, Point* point);
 168
 169
 170 /** Function called once the object has been selected.
 171  *  Basically, this function should update the object (position of the
 172  *  handles,...)  This is one of the object_ops functions.
 173  *  This function should not redraw the object.
 174  * @param obj An object that is being selected.
 175  * @param clicked_point is the point on the screen where the user has clicked
 176  * @param interactive_renderer is a renderer that has some extra functions
 177  *                        most notably the possibility to get EXACT
 178  *                       measures of strings. Used to place cursors
 179  *                       and other interactive stuff.
 180  *                       (Don't draw to the renderer)
 181  */
 182 typedef void (*SelectFunc) (DiaObject*   obj,
 183                             Point*    clicked_point,
 184                             DiaRenderer* interactive_renderer);
 185
 186 /** Returns a copy of DiaObject.
 187  *  This must be an depth-copy (pointers must be duplicated and so on)
 188  *  as the initial object can be deleted any time.
 189  *  This is one of the object_ops functions.
 190  * @param obj An object to make a copy of.
 191  * @return A newly allocated object copied from `obj', but without any
 192  *         connections to other objects.
 193  */
 194 typedef DiaObject* (*CopyFunc) (DiaObject* obj);
 195
 196 /** Function called to move the entire object.
 197  *  This is one of the object_ops functions.
 198  * @param obj The object being moved.
 199  * @param pos Where the object is being moved to.
 200  *  Its exact definition depends on the object. It is the point on the
 201  *  object that 'snaps' to the grid if that is enabled. (generally it
 202  *  is the upper left corner)
 203  * @return An ObjectChange* with additional undo information, or
 204  * (in most cases) NULL.  Undo for moving the object itself is handled
 205  * elsewhere.
 206  */
 207 typedef ObjectChange* (*MoveFunc) (DiaObject* obj, Point * pos);
 208
 209 /** Function called to move one of the handles associated with the
 210  *  object.  This is one of the object_ops functions.
 211  * @param obj The object whose handle is being moved.
 212  * @param handle The handle being moved.
 213  * @param pos The position it has been moved to (corrected for
 214  *   vertical/horizontal only movement).
 215  * @param cp If non-NULL, the connectionpoint found at this position.
 216  *   If @a cp is NULL, there may or may not be a connectionpoint.
 217  * @param The reason the handle was moved.
 218  *     - HANDLE_MOVE_USER means the user is dragging the point.
 219  *     - HANDLE_MOVE_USER_FINAL means the user let go of the point.
 220  *     - HANDLE_MOVE_CONNECTED means it was moved because something
 221  *          it was connected to moved.
 222  * @param modifiers gives a bitset of modifier keys currently held down
 223  *     - MODIFIER_SHIFT is either shift key
 224  *     - MODIFIER_ALT is either alt key
 225  *     - MODIFIER_CONTROL is either control key
 226  *          Each has MODIFIER_LEFT_* and MODIFIER_RIGHT_* variants
 227  * @return An @a ObjectChange* with additional undo information, or
 228  *  (in most cases) NULL.  Undo for moving the handle itself is handled
 229  *  elsewhere.
 230  */
 231 typedef ObjectChange* (*MoveHandleFunc) (DiaObject*          obj,
 232                                          Handle*          handle,
 233                                          Point*           pos,
 234                                          ConnectionPoint* cp,
 235                                          HandleMoveReason reason,
 236                                          ModifierKeys     modifiers);
 237
 238 /** Function called when the user has double clicked on an DiaObject.
 239  *  This is one of the object_ops functions.
 240  * @param obj An obj that this dialog is being made for.
 241  * @param is_default If true, this dialog is for object defaults, and
 242  * the toolbox options should not be shown.
 243  * @return A dialog to edit the properties of the object.
 244  * When this function is called and the dialog already is created,
 245  * make sure to update the values in the widgets so that it
 246  * accurately describes the current state of the object.
 247  * Remember to destroy this dialog when the object is destroyed!
 248
 249  * Note that if you want to use the same dialog multiple times,
 250  * you should ref it first.  Just run the following on the widget
 251  * when you create it:
 252  *   gtk_object_ref(GTK_OBJECT(widget));
 253  *   gtk_object_sink(GTK_OBJECT(widget)); / * optional, but recommended * /
 254  * If you don't do this, the widget will be destroyed when the
 255  * properties dialog is closed.
 256  */
 257 typedef GtkWidget *(*GetPropertiesFunc) (DiaObject* obj, gboolean is_default);
 258
 259 /** This function is called when the user clicks on
 260  *  the "Apply" button.  The widget parameter is the one created by
 261  *  the get_properties function.
 262  *  This is one of the object_ops functions.
 263  * @param obj The object whose dialog has had its Apply button clicked.
 264  * @param widget The properties dialog being applied.
 265  * @return a Change that can be used for undo/redo.
 266  * The returned change is already applied.
 267  */
 268 typedef ObjectChange *(*ApplyPropertiesFunc) (DiaObject* obj, GtkWidget *widget);
 269
 270 /** Desribe the properties that this object supports.
 271  *  This is one of the object_ops functions.
 272  * @param obj The object whose properties we want described.
 273  * @return a NULL-terminated array of property descriptions.
 274  * As the const return implies the returned data is not owned by  the caller.
 275  */
 276 typedef const PropDescription *(* DescribePropsFunc) (DiaObject *obj);
 277
 278 /** Get the actual values of the properties given.
 279  * Note that the props array need not contain all the properties
 280  * defined for the object, nor do all the properties in the array need be
 281  * defined for the object.  All properties in the props array that are
 282  * actually set will be set.
 283  * This is one of the object_ops functions.
 284  * @param obj An object that delivers the values.
 285  * @param props A list of Property objects whose values are to be set based
 286  *              on the objects internal data.  The types for the objects are
 287  *              also being set as a side-effect.
 288  */
 289 typedef void (* GetPropsFunc) (DiaObject *obj, GPtrArray *props);
 290
 291 /** Set the object to have the values defined in the properties list.
 292  * Note that the props array may contain more or fewer properties than the
 293  * object defines, but only and all the ones defined for the object will
 294  * be applied to the object.
 295  * This is one of the object_ops functions.
 296  * @param obj An object to update values on.
 297  * @param props An array of Property objects whose values are to be set on
 298  *              the object.
 299  */
 300 typedef void (* SetPropsFunc) (DiaObject *obj, GPtrArray *props);
 301
 302 /** Return an object-specific menu with toggles etc. properly set.
 303  * This is one of the object_ops functions.
 304  * @param obj The object that is selected when the object menu is asked for.
 305  * @param position Where the user clicked.  This can be used to place whatever
 306  * the menu point may create, such as new segment corners.
 307  * @return A menu description with values set appropriately for this object.
 308  * The description object must not be freed by the caller.
 309  */
 310 typedef DiaMenu *(*ObjectMenuFunc) (DiaObject* obj, Point *position);
 311
 312 /** Function for updates on a text part of an object.  This function, if
 313  * not null, will be called every time the text is changed or editing
 314  * starts or stops.
 315  * This is one of the object_ops functions.
 316  * @param obj The self object
 317  * @param text The text entry being edited
 318  * @param state The state of the editing, either TEXT_EDIT_START,
 319  * TEXT_EDIT_INSERT, TEXT_EDIT_DELETE, or TEXT_EDIT_END.
 320  * @param textchange For TEXT_EDIT_INSERT, the text about to be inserted.
 321  * For TEXT_EDIT_DELETE, the text about to be deleted.
 322  * @return For TEXT_EDIT_INSERT and TEXT_EDIT_DELETE, TRUE this change
 323  * will be allowed, FALSE otherwise.  For TEXT_EDIT_START and TEXT_EDIT_END,
 324  * the return value is ignored.
 325  */
 326 typedef gboolean (*TextEditFunc) (DiaObject *obj, Text *text, TextEditState state, gchar *textchange);
 327
 328 /*************************************
 329  **  The functions provided in object.c
 330  *************************************/
 331
 332 void object_init(DiaObject *obj, int num_handles, int num_connections);
 333 void object_destroy(DiaObject *obj); /* Unconnects handles, so don't
 334                                             free handles before calling. */
 335 void object_copy(DiaObject *from, DiaObject *to);
 336
 337 void object_save(DiaObject *obj, ObjectNode obj_node);
 338 void object_load(DiaObject *obj, ObjectNode obj_node);
 339
 340 GList *object_copy_list(GList *list);
 341 ObjectChange* object_list_move_delta_r(GList *objects, Point *delta, gboolean affected);
 342 ObjectChange* object_list_move_delta(GList *objects, Point *delta);
 343 /** Rotate an object around a point.  If center is NULL, the position of
 344  * the object is used. */
 345 ObjectChange* object_list_rotate(GList *objects, Point *center, real angle);
 346 /** Scale an object around a point.  If center is NULL, the position of
 347  * the object is used. */
 348 ObjectChange* object_list_scale(GList *objects, Point *center, real factor);
 349 void destroy_object_list(GList *list);
 350 void object_add_handle(DiaObject *obj, Handle *handle);
 351 void object_add_handle_at(DiaObject *obj, Handle *handle, int pos);
 352 void object_remove_handle(DiaObject *obj, Handle *handle);
 353 void object_add_connectionpoint(DiaObject *obj, ConnectionPoint *conpoint);
 354 void object_remove_connectionpoint(DiaObject *obj,
 355                                    ConnectionPoint *conpoint);
 356 void object_add_connectionpoint_at(DiaObject *obj,
 357                                    ConnectionPoint *conpoint,
 358                                    int pos);
 359 void object_connect(DiaObject *obj, Handle *handle,
 360                     ConnectionPoint *conpoint);
 361 void object_unconnect(DiaObject *connected_obj, Handle *handle);
 362 void object_remove_connections_to(ConnectionPoint *conpoint);
 363 void object_unconnect_all(DiaObject *connected_obj);
 364 void object_registry_init(void);
 365 void object_register_type(DiaObjectType *type);
 366 void object_registry_foreach(GHFunc func, gpointer  user_data);
 367 DiaObjectType *object_get_type(char *name);
 368 gchar *object_get_displayname (DiaObject* obj);
 369 gboolean object_flags_set(DiaObject* obj, gint flags);
 370
 371 int object_return_false(DiaObject *obj); /* Just returns FALSE */
 372 void *object_return_null(DiaObject *obj); /* Just returns NULL */
 373 void object_return_void(DiaObject *obj); /* Just an empty function */
 374
 375 /* These functions can be used as a default implementation for an object which
 376    can be completely described, loaded and saved through standard properties.
 377 */
 378 DiaObject *object_load_using_properties(const DiaObjectType *type,
 379                                      ObjectNode obj_node, int version,
 380                                      const char *filename);
 381 void object_save_using_properties(DiaObject *obj, ObjectNode obj_node,
 382                                   int version, const char *filename);
 383 DiaObject *object_copy_using_properties(DiaObject *obj);
 384
 385 /*****************************************
 386  **  The structures used to define an object
 387  *****************************************/
 388
 389 /**
 390  * \private This is currently unused
 391  *
 392  * This structure defines an affine transformation that has been applied
 393  * to this object.  Affine transformations done on a group are performed
 394  * on all objects in the group.
 395  */
 396 typedef struct _Affine {
 397   real rotation;
 398   real scale;
 399   real translation;
 400 } Affine;
 401
 402
 403 /*!
 404   \brief _DiaObject vtable
 405
 406   This structure gives access to the functions used to manipulate an object
 407   See information above on the use of the functions
 408 */
 409 struct _ObjectOps {
 410   DestroyFunc         destroy;
 411   DrawFunc            draw;
 412   DistanceFunc        distance_from;
 413   SelectFunc          selectf;
 414   CopyFunc            copy;
 415   MoveFunc            move;
 416   MoveHandleFunc      move_handle;
 417   GetPropertiesFunc   get_properties;
 418   ApplyPropertiesFunc apply_properties;
 419   ObjectMenuFunc      get_object_menu;
 420
 421   DescribePropsFunc   describe_props;
 422   GetPropsFunc        get_props;
 423   SetPropsFunc        set_props;
 424
 425   TextEditFunc        edit_text;
 426
 427   /*!
 428     Unused places (for extension).
 429     These should be NULL for now. In the future they might be used.
 430     Then an older object will be binary compatible, because all new code
 431     checks if new ops are supported (!= NULL)
 432   */
 433   void      (*(unused[5]))(DiaObject *obj,...);
 434 };
 435
 436 /*!
 437   \class _DiaObject
 438
 439   \brief Base class for all of Dia's objects, i.e. diagram building blocks
 440
 441   The base class in the DiaObject hierarchy.
 442   All information in this structure read-only
 443   from the application point of view except
 444   when connection objects. (Then handles and
 445   connections are changed).
 446
 447   position is not necessarly the corner of the object, but rather
 448   some 'good' spot on it which will be natural to snap to.
 449 */
 450 struct _DiaObject {
 451   DiaObjectType    *type; /*!< pointer to the registered type */
 452   Point             position; /*!<  often but not necessarily the upper left corner of the object */
 453   /** The area that contains all parts of the 'real' object, i.e. the parts
 454    *  that would be printed, exported to pixmaps etc.  This is also used to
 455    *  determine the size of autofit scaling, so it should be as large as
 456    *  the objects without interactive bits and preferably no larger.
 457    *  The bounding_box will always contain this box.
 458    *  Do not access this field directly, but use dia_object_get_enclosing_box().
 459    */
 460   Rectangle         bounding_box;
 461   Affine            affine; /*!< unused */
 462
 463   int               num_handles;
 464   Handle          **handles;
 465
 466   int               num_connections;
 467   ConnectionPoint **connections;
 468
 469   ObjectOps *ops; /*!< pointer to the vtable */
 470
 471   Layer *parent_layer; /*< Back-pointer to the owning layer.
 472                            This may only be set by functions internal to
 473                            the layer, and accessed via
 474                            dia_object_get_parent_layer() */
 475   DiaObject *parent; /*!< Back-pointer to DiaObject which is parenting this object. Can be NULL */
 476   GList *children; /*!< In case this object is a parent of other object the children are listed here */
 477   gint flags; /*!< Various flags that can be set for this object, see defines above */
 478
 479   Color *highlight_color; /*!< The color that this object is currently
 480                                highlighted with, or NULL if it is not
 481                                highlighted. */
 482   /** The area that contains all parts rendered interactively, so includes
 483    *  handles, bezier controllers etc.  Despite historical difference, this
 484    *  should not be accessed directly, but through dia_object_get_bounding_box().
 485    *  Note that handles and connection points are not included by this, but
 486    *  added by that which needs it.
 487    *  Internal:  If this is set to a 0x0 box, returns bounding_box.  That is for
 488    *  those objects that don't actually calculate it, but can just use the BB.
 489    *  Since handles and CPs are not in the BB, that will be the case for most
 490    *  objects.
 491    */
 492   Rectangle         enclosing_box;
 493 };
 494
 495 /*!
 496  * \brief Vtable for _DiaObjectType
 497  */
 498 struct _ObjectTypeOps {
 499   CreateFunc        create;
 500   LoadFunc          load;
 501   SaveFunc          save;
 502   GetDefaultsFunc   get_defaults;
 503   ApplyDefaultsFunc apply_defaults;
 504   /*
 505     Unused places (for extension).
 506     These should be NULL for now. In the future they might be used.
 507     Then an older object will be binary compatible, because all new code
 508     checks if new ops are supported (!= NULL)
 509   */
 510   void      (*(unused[10]))(DiaObject *obj,...);
 511 };
 512
 513 /*!
 514    \brief _DiaObject factory
 515
 516    Structure so that the ObjectFactory can create objects
 517    of unknown type. (Read in from a shared lib.)
 518  */
 519 struct _DiaObjectType {
 520
 521   char *name; /*!< The type name should follow a pattern of '<module> - <class>' like "UML - Class" */
 522   int version; /*!< DiaObjects must be backward compatible, i.e. support possibly older versions formats */
 523
 524   char **pixmap; /* Also put a pixmap in the sheet_object.
 525                     This one is used if not in sheet but in toolbar.
 526                     Stored in xpm format */
 527
 528   ObjectTypeOps *ops; /*!< pointer to the vtable */
 529
 530   char *pixmap_file; /* fallback if pixmap is NULL */
 531   void *default_user_data; /* use this if no user data is specified in
 532                               the .sheet file */
 533 };
 534
 535 /* base property stuff ... */
 536 #define OBJECT_COMMON_PROPERTIES \
 537   { "obj_pos", PROP_TYPE_POINT, 0, \
 538     "Object position", "Where the object is located"}, \
 539   { "obj_bb", PROP_TYPE_RECT, 0, \
 540     "Object bounding box", "The bounding box of the object"}
 541
 542 #define OBJECT_COMMON_PROPERTIES_OFFSETS \
 543   { "obj_pos", PROP_TYPE_POINT, offsetof(DiaObject, position) }, \
 544   { "obj_bb", PROP_TYPE_RECT, offsetof(DiaObject, bounding_box) }
 545
 546
 547 gboolean       dia_object_defaults_load (const gchar *filename,
 548                                          gboolean create_lazy);
 549 void           dia_object_default_make (const DiaObject *obj_from);
 550 DiaObject  *dia_object_default_get  (const DiaObjectType *type);
 551 DiaObject  *dia_object_default_create (const DiaObjectType *type,
 552                                     Point *startpoint,
 553                                     void *user_data,
 554                                     Handle **handle1,
 555                                     Handle **handle2);
 556 gboolean       dia_object_defaults_save (const gchar *filename);
 557 Layer         *dia_object_get_parent_layer(DiaObject *obj);
 558 gboolean       dia_object_is_selected (const DiaObject *obj);
 559 Rectangle     *dia_object_get_bounding_box(const DiaObject *obj);
 560 Rectangle     *dia_object_get_enclosing_box(const DiaObject *obj);
 561 DiaObject     *dia_object_get_parent_with_flags(DiaObject *obj, guint flags);
 562 gboolean       dia_object_is_selectable(DiaObject *obj);
 563 /* The below are for debugging purposes only. */
 564 gboolean   dia_object_sanity_check(const DiaObject *obj, const gchar *msg);
 565
 566 /** A standard definition of a function that takes a DiaObject */
 567 typedef void (*DiaObjectFunc) (const DiaObject *obj);
 568
 569 G_END_DECLS
 570
 571 #endif /* OBJECT_H */
 572