1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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.
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 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library 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.
19 #ifndef __GTK_WIDGET_H__
20 #define __GTK_WIDGET_H__
24 #include <gtk/gtkaccelgroup.h>
25 #include <gtk/gtkobject.h>
26 #include <gtk/gtkstyle.h>
31 #endif /* __cplusplus */
34 /* The flags that are used by GtkWidget on top of the
35 * flags field of GtkObject.
39 GTK_TOPLEVEL = 1 << 4,
40 GTK_NO_WINDOW = 1 << 5,
41 GTK_REALIZED = 1 << 6,
44 GTK_SENSITIVE = 1 << 9,
45 GTK_PARENT_SENSITIVE = 1 << 10,
46 GTK_CAN_FOCUS = 1 << 11,
47 GTK_HAS_FOCUS = 1 << 12,
48 GTK_CAN_DEFAULT = 1 << 13,
49 GTK_HAS_DEFAULT = 1 << 14,
50 GTK_HAS_GRAB = 1 << 15,
51 GTK_RC_STYLE = 1 << 16,
52 GTK_COMPOSITE_CHILD = 1 << 17,
56 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
57 * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
59 #define GTK_TYPE_WIDGET (gtk_widget_get_type ())
60 #define GTK_WIDGET(widget) (GTK_CHECK_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
61 #define GTK_WIDGET_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
62 #define GTK_IS_WIDGET(widget) (GTK_CHECK_TYPE ((widget), GTK_TYPE_WIDGET))
63 #define GTK_IS_WIDGET_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
65 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
67 #define GTK_WIDGET_TYPE(wid) (GTK_OBJECT_TYPE (wid))
68 #define GTK_WIDGET_STATE(wid) (GTK_WIDGET (wid)->state)
69 #define GTK_WIDGET_SAVED_STATE(wid) (GTK_WIDGET (wid)->saved_state)
71 /* Macros for extracting the widget flags from GtkWidget.
73 #define GTK_WIDGET_FLAGS(wid) (GTK_OBJECT_FLAGS (wid))
74 #define GTK_WIDGET_TOPLEVEL(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
75 #define GTK_WIDGET_NO_WINDOW(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
76 #define GTK_WIDGET_REALIZED(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
77 #define GTK_WIDGET_MAPPED(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
78 #define GTK_WIDGET_VISIBLE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
79 #define GTK_WIDGET_DRAWABLE(wid) ((GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid)) != 0)
80 #define GTK_WIDGET_SENSITIVE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
81 #define GTK_WIDGET_PARENT_SENSITIVE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
82 #define GTK_WIDGET_IS_SENSITIVE(wid) (((GTK_WIDGET_SENSITIVE (wid) && \
83 GTK_WIDGET_PARENT_SENSITIVE (wid)) != 0) != 0)
84 #define GTK_WIDGET_CAN_FOCUS(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
85 #define GTK_WIDGET_HAS_FOCUS(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
86 #define GTK_WIDGET_CAN_DEFAULT(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
87 #define GTK_WIDGET_HAS_DEFAULT(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
88 #define GTK_WIDGET_HAS_GRAB(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
89 #define GTK_WIDGET_RC_STYLE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
90 #define GTK_WIDGET_COMPOSITE_CHILD(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
91 #define GTK_WIDGET_BASIC(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_BASIC) != 0)
93 /* Macros for setting and clearing widget flags.
95 #define GTK_WIDGET_SET_FLAGS(wid,flag) G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
96 #define GTK_WIDGET_UNSET_FLAGS(wid,flag) G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
100 typedef struct _GtkRequisition GtkRequisition;
101 typedef struct _GtkAllocation GtkAllocation;
102 typedef struct _GtkSelectionData GtkSelectionData;
103 typedef struct _GtkWidget GtkWidget;
104 typedef struct _GtkWidgetClass GtkWidgetClass;
105 typedef struct _GtkWidgetAuxInfo GtkWidgetAuxInfo;
106 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
108 typedef void (*GtkCallback) (GtkWidget *widget,
111 /* A requisition is a desired amount of space which a
112 * widget may request.
114 struct _GtkRequisition
120 /* An allocation is a size and position. Where a widget
121 * can ask for a desired size, it is actually given
122 * this amount of space at the specified position.
124 struct _GtkAllocation
132 /* The contents of a selection are returned in a GtkSelectionData
133 structure. selection/target identify the request.
134 type specifies the type of the return; if length < 0, and
135 the data should be ignored. This structure has object semantics -
136 no fields should be modified directly, they should not be created
137 directly, and pointers to them should not be stored beyond the duration of
138 a callback. (If the last is changed, we'll need to add reference
141 struct _GtkSelectionData
151 /* The widget is the base of the tree for displayable objects.
152 * (A displayable object is one which takes up some amount
153 * of screen real estate). It provides a common base and interface
154 * which actual widgets must adhere to.
158 /* The object structure needs to be the first
159 * element in the widget structure in order for
160 * the object mechanism to work correctly. This
161 * allows a GtkWidget pointer to be cast to a
166 /* 16 bits of internally used private flags.
167 * this will be packed into the same 4 byte alignment frame that
168 * state and saved_state go. we therefore don't waste any new
171 guint16 private_flags;
173 /* The state of the widget. There are actually only
174 * 5 widget states (defined in "gtkenums.h").
178 /* The saved state of the widget. When a widgets state
179 * is changed to GTK_STATE_INSENSITIVE via
180 * "gtk_widget_set_state" or "gtk_widget_set_sensitive"
181 * the old state is kept around in this field. The state
182 * will be restored once the widget gets sensitive again.
186 /* The widgets name. If the widget does not have a name
187 * (the name is NULL), then its name (as returned by
188 * "gtk_widget_get_name") is its classes name.
189 * Among other things, the widget name is used to determine
190 * the style to use for a widget.
194 /* The style for the widget. The style contains the
195 * colors the widget should be drawn in for each state
196 * along with graphics contexts used to draw with and
197 * the font to use for text.
201 /* The widgets desired size.
203 GtkRequisition requisition;
205 /* The widgets allocated size.
207 GtkAllocation allocation;
209 /* The widgets window or its parent window if it does
210 * not have a window. (Which will be indicated by the
211 * GTK_NO_WINDOW flag being set).
215 /* The widgets parent.
220 struct _GtkWidgetClass
222 /* The object class structure needs to be the first
223 * element in the widget class structure in order for
224 * the class mechanism to work correctly. This allows a
225 * GtkWidgetClass pointer to be cast to a GtkObjectClass
228 GtkObjectClass parent_class;
230 /* The signal to emit when an object of this class is activated.
231 * This is used when activating the current focus widget and
232 * the default widget.
234 guint activate_signal;
237 void (* show) (GtkWidget *widget);
238 void (* show_all) (GtkWidget *widget);
239 void (* hide) (GtkWidget *widget);
240 void (* hide_all) (GtkWidget *widget);
241 void (* map) (GtkWidget *widget);
242 void (* unmap) (GtkWidget *widget);
243 void (* realize) (GtkWidget *widget);
244 void (* unrealize) (GtkWidget *widget);
245 void (* draw) (GtkWidget *widget,
247 void (* draw_focus) (GtkWidget *widget);
248 void (* draw_default) (GtkWidget *widget);
249 void (* size_request) (GtkWidget *widget,
250 GtkRequisition *requisition);
251 void (* size_allocate) (GtkWidget *widget,
252 GtkAllocation *allocation);
253 void (* state_changed) (GtkWidget *widget,
254 GtkStateType previous_state);
255 void (* parent_set) (GtkWidget *widget,
256 GtkWidget *previous_parent);
257 void (* style_set) (GtkWidget *widget,
258 GtkStyle *previous_style);
261 gint (* add_accelerator) (GtkWidget *widget,
262 guint accel_signal_id,
263 GtkAccelGroup *accel_group,
265 GdkModifierType accel_mods,
266 GtkAccelFlags accel_flags);
267 void (* remove_accelerator) (GtkWidget *widget,
268 GtkAccelGroup *accel_group,
270 GdkModifierType accel_mods);
273 gint (* event) (GtkWidget *widget,
275 gint (* button_press_event) (GtkWidget *widget,
276 GdkEventButton *event);
277 gint (* button_release_event) (GtkWidget *widget,
278 GdkEventButton *event);
279 gint (* motion_notify_event) (GtkWidget *widget,
280 GdkEventMotion *event);
281 gint (* delete_event) (GtkWidget *widget,
283 gint (* destroy_event) (GtkWidget *widget,
285 gint (* expose_event) (GtkWidget *widget,
286 GdkEventExpose *event);
287 gint (* key_press_event) (GtkWidget *widget,
289 gint (* key_release_event) (GtkWidget *widget,
291 gint (* enter_notify_event) (GtkWidget *widget,
292 GdkEventCrossing *event);
293 gint (* leave_notify_event) (GtkWidget *widget,
294 GdkEventCrossing *event);
295 gint (* configure_event) (GtkWidget *widget,
296 GdkEventConfigure *event);
297 gint (* focus_in_event) (GtkWidget *widget,
298 GdkEventFocus *event);
299 gint (* focus_out_event) (GtkWidget *widget,
300 GdkEventFocus *event);
301 gint (* map_event) (GtkWidget *widget,
303 gint (* unmap_event) (GtkWidget *widget,
305 gint (* property_notify_event) (GtkWidget *widget,
306 GdkEventProperty *event);
307 gint (* selection_clear_event) (GtkWidget *widget,
308 GdkEventSelection *event);
309 gint (* selection_request_event) (GtkWidget *widget,
310 GdkEventSelection *event);
311 gint (* selection_notify_event) (GtkWidget *widget,
312 GdkEventSelection *event);
313 gint (* proximity_in_event) (GtkWidget *widget,
314 GdkEventProximity *event);
315 gint (* proximity_out_event) (GtkWidget *widget,
316 GdkEventProximity *event);
317 gint (* drag_begin_event) (GtkWidget *widget,
318 GdkEventDragBegin *event);
319 gint (* drag_request_event) (GtkWidget *widget,
320 GdkEventDragRequest *event);
321 gint (* drag_end_event) (GtkWidget *widget,
323 gint (* drop_enter_event) (GtkWidget *widget,
324 GdkEventDropEnter *event);
325 gint (* drop_leave_event) (GtkWidget *widget,
326 GdkEventDropLeave *event);
327 gint (* drop_data_available_event)(GtkWidget *widget,
328 GdkEventDropDataAvailable *event);
329 gint (* visibility_notify_event) (GtkWidget *widget,
330 GdkEventVisibility *event);
331 gint (* client_event) (GtkWidget *widget,
332 GdkEventClient *event);
333 gint (* no_expose_event) (GtkWidget *widget,
335 gint (* other_event) (GtkWidget *widget,
336 GdkEventOther *event);
339 void (* selection_received) (GtkWidget *widget,
340 GtkSelectionData *selection_data);
343 void (* debug_msg) (GtkWidget *widget,
344 const gchar *string);
347 struct _GtkWidgetAuxInfo
355 struct _GtkWidgetShapeInfo
359 GdkBitmap *shape_mask;
363 GtkType gtk_widget_get_type (void);
364 GtkWidget* gtk_widget_new (GtkType type,
365 const gchar *first_arg_name,
367 GtkWidget* gtk_widget_newv (GtkType type,
370 void gtk_widget_ref (GtkWidget *widget);
371 void gtk_widget_unref (GtkWidget *widget);
372 void gtk_widget_destroy (GtkWidget *widget);
373 void gtk_widget_destroyed (GtkWidget *widget,
374 GtkWidget **widget_pointer);
375 void gtk_widget_get (GtkWidget *widget,
377 void gtk_widget_getv (GtkWidget *widget,
380 void gtk_widget_set (GtkWidget *widget,
381 const gchar *first_arg_name,
383 void gtk_widget_setv (GtkWidget *widget,
386 void gtk_widget_unparent (GtkWidget *widget);
387 void gtk_widget_show (GtkWidget *widget);
388 void gtk_widget_show_now (GtkWidget *widget);
389 void gtk_widget_hide (GtkWidget *widget);
390 void gtk_widget_show_all (GtkWidget *widget);
391 void gtk_widget_hide_all (GtkWidget *widget);
392 void gtk_widget_map (GtkWidget *widget);
393 void gtk_widget_unmap (GtkWidget *widget);
394 void gtk_widget_realize (GtkWidget *widget);
395 void gtk_widget_unrealize (GtkWidget *widget);
396 void gtk_widget_queue_draw (GtkWidget *widget);
397 void gtk_widget_queue_resize (GtkWidget *widget);
398 void gtk_widget_draw (GtkWidget *widget,
400 void gtk_widget_draw_focus (GtkWidget *widget);
401 void gtk_widget_draw_default (GtkWidget *widget);
402 void gtk_widget_draw_children (GtkWidget *widget);
403 void gtk_widget_size_request (GtkWidget *widget,
404 GtkRequisition *requisition);
405 void gtk_widget_size_allocate (GtkWidget *widget,
406 GtkAllocation *allocation);
407 void gtk_widget_add_accelerator (GtkWidget *widget,
408 const gchar *accel_signal,
409 GtkAccelGroup *accel_group,
412 GtkAccelFlags accel_flags);
413 void gtk_widget_remove_accelerator (GtkWidget *widget,
414 GtkAccelGroup *accel_group,
417 void gtk_widget_remove_accelerators (GtkWidget *widget,
418 const gchar *accel_signal,
419 gboolean visible_only);
420 guint gtk_widget_accelerator_signal (GtkWidget *widget,
421 GtkAccelGroup *accel_group,
424 void gtk_widget_freeze_accelerators (GtkWidget *widget);
425 void gtk_widget_thaw_accelerators (GtkWidget *widget);
426 gint gtk_widget_event (GtkWidget *widget,
429 void gtk_widget_activate (GtkWidget *widget);
430 void gtk_widget_reparent (GtkWidget *widget,
431 GtkWidget *new_parent);
432 void gtk_widget_popup (GtkWidget *widget,
435 gint gtk_widget_intersect (GtkWidget *widget,
437 GdkRectangle *intersection);
438 gint gtk_widget_basic (GtkWidget *widget);
440 void gtk_widget_grab_focus (GtkWidget *widget);
441 void gtk_widget_grab_default (GtkWidget *widget);
443 void gtk_widget_set_name (GtkWidget *widget,
445 gchar* gtk_widget_get_name (GtkWidget *widget);
446 void gtk_widget_set_state (GtkWidget *widget,
448 void gtk_widget_set_sensitive (GtkWidget *widget,
450 void gtk_widget_set_parent (GtkWidget *widget,
452 void gtk_widget_set_parent_window (GtkWidget *widget,
453 GdkWindow *parent_window);
454 GdkWindow *gtk_widget_get_parent_window (GtkWidget *widget);
455 void gtk_widget_set_uposition (GtkWidget *widget,
458 void gtk_widget_set_usize (GtkWidget *widget,
461 void gtk_widget_set_events (GtkWidget *widget,
463 void gtk_widget_set_extension_events (GtkWidget *widget,
464 GdkExtensionMode mode);
466 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget *widget);
467 GtkWidget* gtk_widget_get_toplevel (GtkWidget *widget);
468 GtkWidget* gtk_widget_get_ancestor (GtkWidget *widget,
469 GtkType widget_type);
470 GdkColormap* gtk_widget_get_colormap (GtkWidget *widget);
471 GdkVisual* gtk_widget_get_visual (GtkWidget *widget);
472 gint gtk_widget_get_events (GtkWidget *widget);
473 void gtk_widget_get_pointer (GtkWidget *widget,
477 gint gtk_widget_is_ancestor (GtkWidget *widget,
478 GtkWidget *ancestor);
479 gint gtk_widget_is_child (GtkWidget *widget,
482 /* Hide widget and return TRUE.
484 gint gtk_widget_hide_on_delete (GtkWidget *widget);
488 void gtk_widget_set_style (GtkWidget *widget,
490 void gtk_widget_set_rc_style (GtkWidget *widget);
491 void gtk_widget_ensure_style (GtkWidget *widget);
492 GtkStyle* gtk_widget_get_style (GtkWidget *widget);
493 void gtk_widget_restore_default_style (GtkWidget *widget);
495 /* Descend recursively and set rc-style on all widgets without user styles */
496 void gtk_widget_reset_rc_styles (GtkWidget *widget);
498 /* Push/pop pairs, to change default values upon a widget's creation.
499 * This will override the values that got set by the
500 * gtk_widget_set_default_* () functions.
502 void gtk_widget_push_style (GtkStyle *style);
503 void gtk_widget_push_colormap (GdkColormap *cmap);
504 void gtk_widget_push_visual (GdkVisual *visual);
505 void gtk_widget_push_composite_flag (void);
506 void gtk_widget_pop_composite_flag (void);
507 void gtk_widget_pop_style (void);
508 void gtk_widget_pop_colormap (void);
509 void gtk_widget_pop_visual (void);
511 /* Set certain default values to be used at widget creation time.
513 void gtk_widget_set_default_style (GtkStyle *style);
514 void gtk_widget_set_default_colormap (GdkColormap *colormap);
515 void gtk_widget_set_default_visual (GdkVisual *visual);
516 GtkStyle* gtk_widget_get_default_style (void);
517 GdkColormap* gtk_widget_get_default_colormap (void);
518 GdkVisual* gtk_widget_get_default_visual (void);
520 /* Counterpart to gdk_window_shape_combine_mask.
522 void gtk_widget_shape_combine_mask (GtkWidget *widget,
523 GdkBitmap *shape_mask,
527 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
528 * return newly alocated strings.
530 void gtk_widget_path (GtkWidget *widget,
533 gchar **path_reversed);
534 void gtk_widget_class_path (GtkWidget *widget,
537 gchar **path_reversed);
539 /* When you get a drag_enter event, you can use this to tell Gtk of other
540 * items that are to be dragged as well...
542 void gtk_widget_dnd_drag_add (GtkWidget *widget);
544 /* These two functions enable drag and/or drop on a widget,
545 * and also let Gtk know what data types will be accepted (use MIME
546 * type naming, plus tacking "URL:" on the front for link dragging)
548 void gtk_widget_dnd_drag_set (GtkWidget *widget,
550 gchar **type_accept_list,
552 void gtk_widget_dnd_drop_set (GtkWidget *widget,
554 gchar **type_accept_list,
556 guint8 is_destructive_operation);
558 /* Used to reply to a DRAG_REQUEST event - if you don't want to
559 * give the data then pass in NULL for it
561 void gtk_widget_dnd_data_set (GtkWidget *widget,
564 gulong data_numbytes);
566 #if defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
567 # define gtk_widget_ref gtk_object_ref
568 # define gtk_widget_unref gtk_object_unref
569 #endif /* GTK_TRACE_OBJECTS && __GNUC__ */
574 #endif /* __cplusplus */
577 #endif /* __GTK_WIDGET_H__ */