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[wxWidgets.git] / src / common / event.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/event.cpp
3 // Purpose: Event classes
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 01/02/97
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #include "wx/event.h"
28 #include "wx/evtloop.h"
29
30 #ifndef WX_PRECOMP
31 #include "wx/list.h"
32 #include "wx/log.h"
33 #include "wx/app.h"
34 #include "wx/utils.h"
35 #include "wx/stopwatch.h"
36 #include "wx/module.h"
37
38 #if wxUSE_GUI
39 #include "wx/window.h"
40 #include "wx/control.h"
41 #include "wx/dc.h"
42 #include "wx/spinbutt.h"
43 #include "wx/textctrl.h"
44 #include "wx/validate.h"
45 #endif // wxUSE_GUI
46 #endif
47
48 #include "wx/thread.h"
49
50 #if wxUSE_BASE
51 #include "wx/scopedptr.h"
52
53 wxDECLARE_SCOPED_PTR(wxEvent, wxEventPtr)
54 wxDEFINE_SCOPED_PTR(wxEvent, wxEventPtr)
55 #endif // wxUSE_BASE
56
57 // ----------------------------------------------------------------------------
58 // wxWin macros
59 // ----------------------------------------------------------------------------
60
61 #if wxUSE_BASE
62 IMPLEMENT_DYNAMIC_CLASS(wxEvtHandler, wxObject)
63 IMPLEMENT_ABSTRACT_CLASS(wxEvent, wxObject)
64 IMPLEMENT_DYNAMIC_CLASS(wxIdleEvent, wxEvent)
65 #endif // wxUSE_BASE
66
67 #if wxUSE_GUI
68 IMPLEMENT_DYNAMIC_CLASS(wxCommandEvent, wxEvent)
69 IMPLEMENT_DYNAMIC_CLASS(wxThreadEvent, wxCommandEvent)
70 IMPLEMENT_DYNAMIC_CLASS(wxNotifyEvent, wxCommandEvent)
71 IMPLEMENT_DYNAMIC_CLASS(wxScrollEvent, wxCommandEvent)
72 IMPLEMENT_DYNAMIC_CLASS(wxScrollWinEvent, wxEvent)
73 IMPLEMENT_DYNAMIC_CLASS(wxMouseEvent, wxEvent)
74 IMPLEMENT_DYNAMIC_CLASS(wxKeyEvent, wxEvent)
75 IMPLEMENT_DYNAMIC_CLASS(wxSizeEvent, wxEvent)
76 IMPLEMENT_DYNAMIC_CLASS(wxPaintEvent, wxEvent)
77 IMPLEMENT_DYNAMIC_CLASS(wxNcPaintEvent, wxEvent)
78 IMPLEMENT_DYNAMIC_CLASS(wxEraseEvent, wxEvent)
79 IMPLEMENT_DYNAMIC_CLASS(wxMoveEvent, wxEvent)
80 IMPLEMENT_DYNAMIC_CLASS(wxFocusEvent, wxEvent)
81 IMPLEMENT_DYNAMIC_CLASS(wxChildFocusEvent, wxCommandEvent)
82 IMPLEMENT_DYNAMIC_CLASS(wxCloseEvent, wxEvent)
83 IMPLEMENT_DYNAMIC_CLASS(wxShowEvent, wxEvent)
84 IMPLEMENT_DYNAMIC_CLASS(wxMaximizeEvent, wxEvent)
85 IMPLEMENT_DYNAMIC_CLASS(wxIconizeEvent, wxEvent)
86 IMPLEMENT_DYNAMIC_CLASS(wxMenuEvent, wxEvent)
87 IMPLEMENT_DYNAMIC_CLASS(wxJoystickEvent, wxEvent)
88 IMPLEMENT_DYNAMIC_CLASS(wxDropFilesEvent, wxEvent)
89 IMPLEMENT_DYNAMIC_CLASS(wxActivateEvent, wxEvent)
90 IMPLEMENT_DYNAMIC_CLASS(wxInitDialogEvent, wxEvent)
91 IMPLEMENT_DYNAMIC_CLASS(wxSetCursorEvent, wxEvent)
92 IMPLEMENT_DYNAMIC_CLASS(wxSysColourChangedEvent, wxEvent)
93 IMPLEMENT_DYNAMIC_CLASS(wxDisplayChangedEvent, wxEvent)
94 IMPLEMENT_DYNAMIC_CLASS(wxUpdateUIEvent, wxCommandEvent)
95 IMPLEMENT_DYNAMIC_CLASS(wxNavigationKeyEvent, wxEvent)
96 IMPLEMENT_DYNAMIC_CLASS(wxPaletteChangedEvent, wxEvent)
97 IMPLEMENT_DYNAMIC_CLASS(wxQueryNewPaletteEvent, wxEvent)
98 IMPLEMENT_DYNAMIC_CLASS(wxWindowCreateEvent, wxEvent)
99 IMPLEMENT_DYNAMIC_CLASS(wxWindowDestroyEvent, wxEvent)
100 IMPLEMENT_DYNAMIC_CLASS(wxHelpEvent, wxCommandEvent)
101 IMPLEMENT_DYNAMIC_CLASS(wxContextMenuEvent, wxCommandEvent)
102 IMPLEMENT_DYNAMIC_CLASS(wxMouseCaptureChangedEvent, wxEvent)
103 IMPLEMENT_DYNAMIC_CLASS(wxMouseCaptureLostEvent, wxEvent)
104 IMPLEMENT_DYNAMIC_CLASS(wxClipboardTextEvent, wxCommandEvent)
105 #endif // wxUSE_GUI
106
107 #if wxUSE_BASE
108
109 const wxEventTable *wxEvtHandler::GetEventTable() const
110 { return &wxEvtHandler::sm_eventTable; }
111
112 const wxEventTable wxEvtHandler::sm_eventTable =
113 { (const wxEventTable *)NULL, &wxEvtHandler::sm_eventTableEntries[0] };
114
115 wxEventHashTable &wxEvtHandler::GetEventHashTable() const
116 { return wxEvtHandler::sm_eventHashTable; }
117
118 wxEventHashTable wxEvtHandler::sm_eventHashTable(wxEvtHandler::sm_eventTable);
119
120 const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
121 { wxDECLARE_EVENT_TABLE_TERMINATOR() };
122
123
124 // wxUSE_MEMORY_TRACING considers memory freed from the static objects dtors
125 // leaked, so we need to manually clean up all event tables before checking for
126 // the memory leaks when using it, however this breaks re-initializing the
127 // library (i.e. repeated calls to wxInitialize/wxUninitialize) because the
128 // event tables won't be rebuilt the next time, so disable this by default
129 #if wxUSE_MEMORY_TRACING
130
131 class wxEventTableEntryModule: public wxModule
132 {
133 public:
134 wxEventTableEntryModule() { }
135 virtual bool OnInit() { return true; }
136 virtual void OnExit() { wxEventHashTable::ClearAll(); }
137
138 DECLARE_DYNAMIC_CLASS(wxEventTableEntryModule)
139 };
140
141 IMPLEMENT_DYNAMIC_CLASS(wxEventTableEntryModule, wxModule)
142
143 #endif // wxUSE_MEMORY_TRACING
144
145 // ----------------------------------------------------------------------------
146 // global variables
147 // ----------------------------------------------------------------------------
148
149 // common event types are defined here, other event types are defined by the
150 // components which use them
151
152 const wxEventType wxEVT_FIRST = 10000;
153 const wxEventType wxEVT_USER_FIRST = wxEVT_FIRST + 2000;
154 const wxEventType wxEVT_NULL = wxNewEventType();
155
156 wxDEFINE_EVENT( wxEVT_IDLE, wxIdleEvent );
157
158 #endif // wxUSE_BASE
159
160 #if wxUSE_GUI
161
162 wxDEFINE_EVENT( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEvent );
163 wxDEFINE_EVENT( wxEVT_COMMAND_CHECKBOX_CLICKED, wxCommandEvent );
164 wxDEFINE_EVENT( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEvent );
165 wxDEFINE_EVENT( wxEVT_COMMAND_LISTBOX_SELECTED, wxCommandEvent );
166 wxDEFINE_EVENT( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, wxCommandEvent );
167 wxDEFINE_EVENT( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, wxCommandEvent );
168 wxDEFINE_EVENT( wxEVT_COMMAND_MENU_SELECTED, wxCommandEvent );
169 wxDEFINE_EVENT( wxEVT_COMMAND_SLIDER_UPDATED, wxCommandEvent );
170 wxDEFINE_EVENT( wxEVT_COMMAND_RADIOBOX_SELECTED, wxCommandEvent );
171 wxDEFINE_EVENT( wxEVT_COMMAND_RADIOBUTTON_SELECTED, wxCommandEvent );
172 wxDEFINE_EVENT( wxEVT_COMMAND_SCROLLBAR_UPDATED, wxCommandEvent );
173 wxDEFINE_EVENT( wxEVT_COMMAND_VLBOX_SELECTED, wxCommandEvent );
174 wxDEFINE_EVENT( wxEVT_COMMAND_COMBOBOX_SELECTED, wxCommandEvent );
175 wxDEFINE_EVENT( wxEVT_COMMAND_TOOL_RCLICKED, wxCommandEvent );
176 wxDEFINE_EVENT( wxEVT_COMMAND_TOOL_ENTER, wxCommandEvent );
177 wxDEFINE_EVENT( wxEVT_COMMAND_SPINCTRL_UPDATED, wxCommandEvent );
178 wxDEFINE_EVENT( wxEVT_COMMAND_SPINCTRLDOUBLE_UPDATED, wxCommandEvent );
179 wxDEFINE_EVENT( wxEVT_COMMAND_TOOL_DROPDOWN_CLICKED, wxCommandEvent );
180 wxDEFINE_EVENT( wxEVT_COMMAND_COMBOBOX_DROPDOWN, wxCommandEvent);
181 wxDEFINE_EVENT( wxEVT_COMMAND_COMBOBOX_CLOSEUP, wxCommandEvent);
182
183 // Mouse event types
184 wxDEFINE_EVENT( wxEVT_LEFT_DOWN, wxMouseEvent );
185 wxDEFINE_EVENT( wxEVT_LEFT_UP, wxMouseEvent );
186 wxDEFINE_EVENT( wxEVT_MIDDLE_DOWN, wxMouseEvent );
187 wxDEFINE_EVENT( wxEVT_MIDDLE_UP, wxMouseEvent );
188 wxDEFINE_EVENT( wxEVT_RIGHT_DOWN, wxMouseEvent );
189 wxDEFINE_EVENT( wxEVT_RIGHT_UP, wxMouseEvent );
190 wxDEFINE_EVENT( wxEVT_MOTION, wxMouseEvent );
191 wxDEFINE_EVENT( wxEVT_ENTER_WINDOW, wxMouseEvent );
192 wxDEFINE_EVENT( wxEVT_LEAVE_WINDOW, wxMouseEvent );
193 wxDEFINE_EVENT( wxEVT_LEFT_DCLICK, wxMouseEvent );
194 wxDEFINE_EVENT( wxEVT_MIDDLE_DCLICK, wxMouseEvent );
195 wxDEFINE_EVENT( wxEVT_RIGHT_DCLICK, wxMouseEvent );
196 wxDEFINE_EVENT( wxEVT_SET_FOCUS, wxFocusEvent );
197 wxDEFINE_EVENT( wxEVT_KILL_FOCUS, wxFocusEvent );
198 wxDEFINE_EVENT( wxEVT_CHILD_FOCUS, wxChildFocusEvent );
199 wxDEFINE_EVENT( wxEVT_MOUSEWHEEL, wxMouseEvent );
200 wxDEFINE_EVENT( wxEVT_AUX1_DOWN, wxMouseEvent );
201 wxDEFINE_EVENT( wxEVT_AUX1_UP, wxMouseEvent );
202 wxDEFINE_EVENT( wxEVT_AUX1_DCLICK, wxMouseEvent );
203 wxDEFINE_EVENT( wxEVT_AUX2_DOWN, wxMouseEvent );
204 wxDEFINE_EVENT( wxEVT_AUX2_UP, wxMouseEvent );
205 wxDEFINE_EVENT( wxEVT_AUX2_DCLICK, wxMouseEvent );
206
207 // Character input event type
208 wxDEFINE_EVENT( wxEVT_CHAR, wxKeyEvent );
209 wxDEFINE_EVENT( wxEVT_CHAR_HOOK, wxKeyEvent );
210 wxDEFINE_EVENT( wxEVT_NAVIGATION_KEY, wxNavigationKeyEvent );
211 wxDEFINE_EVENT( wxEVT_KEY_DOWN, wxKeyEvent );
212 wxDEFINE_EVENT( wxEVT_KEY_UP, wxKeyEvent );
213 #if wxUSE_HOTKEY
214 wxDEFINE_EVENT( wxEVT_HOTKEY, wxKeyEvent );
215 #endif
216
217 // Set cursor event
218 wxDEFINE_EVENT( wxEVT_SET_CURSOR, wxSetCursorEvent );
219
220 // wxScrollbar and wxSlider event identifiers
221 wxDEFINE_EVENT( wxEVT_SCROLL_TOP, wxScrollEvent );
222 wxDEFINE_EVENT( wxEVT_SCROLL_BOTTOM, wxScrollEvent );
223 wxDEFINE_EVENT( wxEVT_SCROLL_LINEUP, wxScrollEvent );
224 wxDEFINE_EVENT( wxEVT_SCROLL_LINEDOWN, wxScrollEvent );
225 wxDEFINE_EVENT( wxEVT_SCROLL_PAGEUP, wxScrollEvent );
226 wxDEFINE_EVENT( wxEVT_SCROLL_PAGEDOWN, wxScrollEvent );
227 wxDEFINE_EVENT( wxEVT_SCROLL_THUMBTRACK, wxScrollEvent );
228 wxDEFINE_EVENT( wxEVT_SCROLL_THUMBRELEASE, wxScrollEvent );
229 wxDEFINE_EVENT( wxEVT_SCROLL_CHANGED, wxScrollEvent );
230
231 // Due to a bug in older wx versions, wxSpinEvents were being sent with type of
232 // wxEVT_SCROLL_LINEUP, wxEVT_SCROLL_LINEDOWN and wxEVT_SCROLL_THUMBTRACK. But
233 // with the type-safe events in place, these event types are associated with
234 // wxScrollEvent. To allow handling of spin events, new event types have been
235 // defined in spinbutt.h/spinnbuttcmn.cpp. To maintain backward compatibility
236 // the spin event types are being initialized with the scroll event types.
237
238 #if wxUSE_SPINBTN
239
240 wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_UP, wxSpinEvent, wxEVT_SCROLL_LINEUP );
241 wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_DOWN, wxSpinEvent, wxEVT_SCROLL_LINEDOWN );
242 wxDEFINE_EVENT_ALIAS( wxEVT_SPIN, wxSpinEvent, wxEVT_SCROLL_THUMBTRACK );
243
244 #endif // wxUSE_SPINBTN
245
246 // Scroll events from wxWindow
247 wxDEFINE_EVENT( wxEVT_SCROLLWIN_TOP, wxScrollWinEvent );
248 wxDEFINE_EVENT( wxEVT_SCROLLWIN_BOTTOM, wxScrollWinEvent );
249 wxDEFINE_EVENT( wxEVT_SCROLLWIN_LINEUP, wxScrollWinEvent );
250 wxDEFINE_EVENT( wxEVT_SCROLLWIN_LINEDOWN, wxScrollWinEvent );
251 wxDEFINE_EVENT( wxEVT_SCROLLWIN_PAGEUP, wxScrollWinEvent );
252 wxDEFINE_EVENT( wxEVT_SCROLLWIN_PAGEDOWN, wxScrollWinEvent );
253 wxDEFINE_EVENT( wxEVT_SCROLLWIN_THUMBTRACK, wxScrollWinEvent );
254 wxDEFINE_EVENT( wxEVT_SCROLLWIN_THUMBRELEASE, wxScrollWinEvent );
255
256 // System events
257 wxDEFINE_EVENT( wxEVT_SIZE, wxSizeEvent );
258 wxDEFINE_EVENT( wxEVT_SIZING, wxSizeEvent );
259 wxDEFINE_EVENT( wxEVT_MOVE, wxMoveEvent );
260 wxDEFINE_EVENT( wxEVT_MOVING, wxMoveEvent );
261 wxDEFINE_EVENT( wxEVT_MOVE_START, wxMoveEvent );
262 wxDEFINE_EVENT( wxEVT_MOVE_END, wxMoveEvent );
263 wxDEFINE_EVENT( wxEVT_CLOSE_WINDOW, wxCloseEvent );
264 wxDEFINE_EVENT( wxEVT_END_SESSION, wxCloseEvent );
265 wxDEFINE_EVENT( wxEVT_QUERY_END_SESSION, wxCloseEvent );
266 wxDEFINE_EVENT( wxEVT_HIBERNATE, wxActivateEvent );
267 wxDEFINE_EVENT( wxEVT_ACTIVATE_APP, wxActivateEvent );
268 wxDEFINE_EVENT( wxEVT_ACTIVATE, wxActivateEvent );
269 wxDEFINE_EVENT( wxEVT_CREATE, wxWindowCreateEvent );
270 wxDEFINE_EVENT( wxEVT_DESTROY, wxWindowDestroyEvent );
271 wxDEFINE_EVENT( wxEVT_SHOW, wxShowEvent );
272 wxDEFINE_EVENT( wxEVT_ICONIZE, wxIconizeEvent );
273 wxDEFINE_EVENT( wxEVT_MAXIMIZE, wxMaximizeEvent );
274 wxDEFINE_EVENT( wxEVT_MOUSE_CAPTURE_CHANGED, wxMouseCaptureChangedEvent );
275 wxDEFINE_EVENT( wxEVT_MOUSE_CAPTURE_LOST, wxMouseCaptureLostEvent );
276 wxDEFINE_EVENT( wxEVT_PAINT, wxPaintEvent );
277 wxDEFINE_EVENT( wxEVT_ERASE_BACKGROUND, wxEraseEvent );
278 wxDEFINE_EVENT( wxEVT_NC_PAINT, wxNcPaintEvent );
279 wxDEFINE_EVENT( wxEVT_MENU_OPEN, wxMenuEvent );
280 wxDEFINE_EVENT( wxEVT_MENU_CLOSE, wxMenuEvent );
281 wxDEFINE_EVENT( wxEVT_MENU_HIGHLIGHT, wxMenuEvent );
282 wxDEFINE_EVENT( wxEVT_CONTEXT_MENU, wxContextMenuEvent );
283 wxDEFINE_EVENT( wxEVT_SYS_COLOUR_CHANGED, wxSysColourChangedEvent );
284 wxDEFINE_EVENT( wxEVT_DISPLAY_CHANGED, wxDisplayChangedEvent );
285 wxDEFINE_EVENT( wxEVT_QUERY_NEW_PALETTE, wxQueryNewPaletteEvent );
286 wxDEFINE_EVENT( wxEVT_PALETTE_CHANGED, wxPaletteChangedEvent );
287 wxDEFINE_EVENT( wxEVT_JOY_BUTTON_DOWN, wxJoystickEvent );
288 wxDEFINE_EVENT( wxEVT_JOY_BUTTON_UP, wxJoystickEvent );
289 wxDEFINE_EVENT( wxEVT_JOY_MOVE, wxJoystickEvent );
290 wxDEFINE_EVENT( wxEVT_JOY_ZMOVE, wxJoystickEvent );
291 wxDEFINE_EVENT( wxEVT_DROP_FILES, wxDropFilesEvent );
292 wxDEFINE_EVENT( wxEVT_INIT_DIALOG, wxInitDialogEvent );
293 wxDEFINE_EVENT( wxEVT_UPDATE_UI, wxUpdateUIEvent );
294
295 // Clipboard events
296 wxDEFINE_EVENT( wxEVT_COMMAND_TEXT_COPY, wxClipboardTextEvent );
297 wxDEFINE_EVENT( wxEVT_COMMAND_TEXT_CUT, wxClipboardTextEvent );
298 wxDEFINE_EVENT( wxEVT_COMMAND_TEXT_PASTE, wxClipboardTextEvent );
299
300 // Generic command events
301 // Note: a click is a higher-level event than button down/up
302 wxDEFINE_EVENT( wxEVT_COMMAND_LEFT_CLICK, wxCommandEvent );
303 wxDEFINE_EVENT( wxEVT_COMMAND_LEFT_DCLICK, wxCommandEvent );
304 wxDEFINE_EVENT( wxEVT_COMMAND_RIGHT_CLICK, wxCommandEvent );
305 wxDEFINE_EVENT( wxEVT_COMMAND_RIGHT_DCLICK, wxCommandEvent );
306 wxDEFINE_EVENT( wxEVT_COMMAND_SET_FOCUS, wxCommandEvent );
307 wxDEFINE_EVENT( wxEVT_COMMAND_KILL_FOCUS, wxCommandEvent );
308 wxDEFINE_EVENT( wxEVT_COMMAND_ENTER, wxCommandEvent );
309
310 // Help events
311 wxDEFINE_EVENT( wxEVT_HELP, wxHelpEvent );
312 wxDEFINE_EVENT( wxEVT_DETAILED_HELP, wxHelpEvent );
313
314 // Thread event
315 wxDEFINE_EVENT( wxEVT_COMMAND_THREAD, wxThreadEvent );
316
317 #endif // wxUSE_GUI
318
319 #if wxUSE_BASE
320
321 wxIdleMode wxIdleEvent::sm_idleMode = wxIDLE_PROCESS_ALL;
322
323 // ============================================================================
324 // implementation
325 // ============================================================================
326
327 // ----------------------------------------------------------------------------
328 // event initialization
329 // ----------------------------------------------------------------------------
330
331 int wxNewEventType()
332 {
333 // MT-FIXME
334 static int s_lastUsedEventType = wxEVT_FIRST;
335
336 return s_lastUsedEventType++;
337 }
338 // ----------------------------------------------------------------------------
339 // wxEventFunctor
340 // ----------------------------------------------------------------------------
341
342 wxEventFunctor::~wxEventFunctor()
343 {
344 }
345
346 // ----------------------------------------------------------------------------
347 // wxEvent
348 // ----------------------------------------------------------------------------
349
350 /*
351 * General wxWidgets events, covering all interesting things that might happen
352 * (button clicking, resizing, setting text in widgets, etc.).
353 *
354 * For each completely new event type, derive a new event class.
355 *
356 */
357
358 wxEvent::wxEvent(int theId, wxEventType commandType)
359 {
360 m_eventType = commandType;
361 m_eventObject = NULL;
362 m_timeStamp = 0;
363 m_id = theId;
364 m_skipped = false;
365 m_callbackUserData = NULL;
366 m_handlerToProcessOnlyIn = NULL;
367 m_isCommandEvent = false;
368 m_propagationLevel = wxEVENT_PROPAGATE_NONE;
369 m_wasProcessed = false;
370 }
371
372 wxEvent::wxEvent(const wxEvent& src)
373 : wxObject(src)
374 , m_eventObject(src.m_eventObject)
375 , m_eventType(src.m_eventType)
376 , m_timeStamp(src.m_timeStamp)
377 , m_id(src.m_id)
378 , m_callbackUserData(src.m_callbackUserData)
379 , m_handlerToProcessOnlyIn(NULL)
380 , m_propagationLevel(src.m_propagationLevel)
381 , m_skipped(src.m_skipped)
382 , m_isCommandEvent(src.m_isCommandEvent)
383 , m_wasProcessed(false)
384 {
385 }
386
387 wxEvent& wxEvent::operator=(const wxEvent& src)
388 {
389 wxObject::operator=(src);
390
391 m_eventObject = src.m_eventObject;
392 m_eventType = src.m_eventType;
393 m_timeStamp = src.m_timeStamp;
394 m_id = src.m_id;
395 m_callbackUserData = src.m_callbackUserData;
396 m_handlerToProcessOnlyIn = NULL;
397 m_propagationLevel = src.m_propagationLevel;
398 m_skipped = src.m_skipped;
399 m_isCommandEvent = src.m_isCommandEvent;
400
401 // don't change m_wasProcessed
402
403 return *this;
404 }
405
406 #endif // wxUSE_BASE
407
408 #if wxUSE_GUI
409
410 // ----------------------------------------------------------------------------
411 // wxCommandEvent
412 // ----------------------------------------------------------------------------
413
414 #ifdef __VISUALC__
415 // 'this' : used in base member initializer list (for m_commandString)
416 #pragma warning(disable:4355)
417 #endif
418
419 wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId)
420 : wxEvent(theId, commandType)
421 {
422 m_clientData = NULL;
423 m_clientObject = NULL;
424 m_extraLong = 0;
425 m_commandInt = 0;
426 m_isCommandEvent = true;
427
428 // the command events are propagated upwards by default
429 m_propagationLevel = wxEVENT_PROPAGATE_MAX;
430 }
431
432 #ifdef __VISUALC__
433 #pragma warning(default:4355)
434 #endif
435
436 wxString wxCommandEvent::GetString() const
437 {
438 if (m_eventType != wxEVT_COMMAND_TEXT_UPDATED || !m_eventObject)
439 {
440 return m_cmdString;
441 }
442 else
443 {
444 #if wxUSE_TEXTCTRL
445 wxTextCtrl *txt = wxDynamicCast(m_eventObject, wxTextCtrl);
446 if ( txt )
447 return txt->GetValue();
448 else
449 #endif // wxUSE_TEXTCTRL
450 return m_cmdString;
451 }
452 }
453
454 // ----------------------------------------------------------------------------
455 // wxUpdateUIEvent
456 // ----------------------------------------------------------------------------
457
458 #if wxUSE_LONGLONG
459 wxLongLong wxUpdateUIEvent::sm_lastUpdate = 0;
460 #endif
461
462 long wxUpdateUIEvent::sm_updateInterval = 0;
463
464 wxUpdateUIMode wxUpdateUIEvent::sm_updateMode = wxUPDATE_UI_PROCESS_ALL;
465
466 // Can we update?
467 bool wxUpdateUIEvent::CanUpdate(wxWindowBase *win)
468 {
469 // Don't update if we've switched global updating off
470 // and this window doesn't support updates.
471 if (win &&
472 (GetMode() == wxUPDATE_UI_PROCESS_SPECIFIED &&
473 ((win->GetExtraStyle() & wxWS_EX_PROCESS_UI_UPDATES) == 0)))
474 return false;
475
476 if (sm_updateInterval == -1)
477 return false;
478
479 if (sm_updateInterval == 0)
480 return true;
481
482 #if wxUSE_STOPWATCH && wxUSE_LONGLONG
483 wxLongLong now = wxGetLocalTimeMillis();
484 if (now > (sm_lastUpdate + sm_updateInterval))
485 {
486 return true;
487 }
488
489 return false;
490 #else
491 // If we don't have wxStopWatch or wxLongLong, we
492 // should err on the safe side and update now anyway.
493 return true;
494 #endif
495 }
496
497 // Reset the update time to provide a delay until the next
498 // time we should update
499 void wxUpdateUIEvent::ResetUpdateTime()
500 {
501 #if wxUSE_STOPWATCH && wxUSE_LONGLONG
502 if (sm_updateInterval > 0)
503 {
504 wxLongLong now = wxGetLocalTimeMillis();
505 if (now > (sm_lastUpdate + sm_updateInterval))
506 {
507 sm_lastUpdate = now;
508 }
509 }
510 #endif
511 }
512
513 // ----------------------------------------------------------------------------
514 // wxScrollEvent
515 // ----------------------------------------------------------------------------
516
517 wxScrollEvent::wxScrollEvent(wxEventType commandType,
518 int id,
519 int pos,
520 int orient)
521 : wxCommandEvent(commandType, id)
522 {
523 m_extraLong = orient;
524 m_commandInt = pos;
525 }
526
527 // ----------------------------------------------------------------------------
528 // wxScrollWinEvent
529 // ----------------------------------------------------------------------------
530
531 wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
532 int pos,
533 int orient)
534 {
535 m_eventType = commandType;
536 m_extraLong = orient;
537 m_commandInt = pos;
538 }
539
540 // ----------------------------------------------------------------------------
541 // wxMouseEvent
542 // ----------------------------------------------------------------------------
543
544 wxMouseEvent::wxMouseEvent(wxEventType commandType)
545 {
546 m_eventType = commandType;
547
548 m_x = 0;
549 m_y = 0;
550
551 m_leftDown = false;
552 m_middleDown = false;
553 m_rightDown = false;
554 m_aux1Down = false;
555 m_aux2Down = false;
556
557 m_clickCount = -1;
558
559 m_wheelRotation = 0;
560 m_wheelDelta = 0;
561 m_linesPerAction = 0;
562 m_wheelAxis = 0;
563 }
564
565 void wxMouseEvent::Assign(const wxMouseEvent& event)
566 {
567 wxEvent::operator=(event);
568
569 // Borland C++ 5.82 doesn't compile an explicit call to an implicitly
570 // defined operator=() so need to do it this way:
571 *static_cast<wxMouseState *>(this) = event;
572
573 m_x = event.m_x;
574 m_y = event.m_y;
575
576 m_leftDown = event.m_leftDown;
577 m_middleDown = event.m_middleDown;
578 m_rightDown = event.m_rightDown;
579 m_aux1Down = event.m_aux1Down;
580 m_aux2Down = event.m_aux2Down;
581
582 m_wheelRotation = event.m_wheelRotation;
583 m_wheelDelta = event.m_wheelDelta;
584 m_linesPerAction = event.m_linesPerAction;
585 m_wheelAxis = event.m_wheelAxis;
586 }
587
588 // return true if was a button dclick event
589 bool wxMouseEvent::ButtonDClick(int but) const
590 {
591 switch (but)
592 {
593 default:
594 wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
595 // fall through
596
597 case wxMOUSE_BTN_ANY:
598 return (LeftDClick() || MiddleDClick() || RightDClick() ||
599 Aux1DClick() || Aux2DClick());
600
601 case wxMOUSE_BTN_LEFT:
602 return LeftDClick();
603
604 case wxMOUSE_BTN_MIDDLE:
605 return MiddleDClick();
606
607 case wxMOUSE_BTN_RIGHT:
608 return RightDClick();
609
610 case wxMOUSE_BTN_AUX1:
611 return Aux1DClick();
612
613 case wxMOUSE_BTN_AUX2:
614 return Aux2DClick();
615 }
616 }
617
618 // return true if was a button down event
619 bool wxMouseEvent::ButtonDown(int but) const
620 {
621 switch (but)
622 {
623 default:
624 wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
625 // fall through
626
627 case wxMOUSE_BTN_ANY:
628 return (LeftDown() || MiddleDown() || RightDown() ||
629 Aux1Down() || Aux2Down());
630
631 case wxMOUSE_BTN_LEFT:
632 return LeftDown();
633
634 case wxMOUSE_BTN_MIDDLE:
635 return MiddleDown();
636
637 case wxMOUSE_BTN_RIGHT:
638 return RightDown();
639
640 case wxMOUSE_BTN_AUX1:
641 return Aux1Down();
642
643 case wxMOUSE_BTN_AUX2:
644 return Aux2Down();
645 }
646 }
647
648 // return true if was a button up event
649 bool wxMouseEvent::ButtonUp(int but) const
650 {
651 switch (but)
652 {
653 default:
654 wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
655 // fall through
656
657 case wxMOUSE_BTN_ANY:
658 return (LeftUp() || MiddleUp() || RightUp() ||
659 Aux1Up() || Aux2Up());
660
661 case wxMOUSE_BTN_LEFT:
662 return LeftUp();
663
664 case wxMOUSE_BTN_MIDDLE:
665 return MiddleUp();
666
667 case wxMOUSE_BTN_RIGHT:
668 return RightUp();
669
670 case wxMOUSE_BTN_AUX1:
671 return Aux1Up();
672
673 case wxMOUSE_BTN_AUX2:
674 return Aux2Up();
675 }
676 }
677
678 // return true if the given button is currently changing state
679 bool wxMouseEvent::Button(int but) const
680 {
681 switch (but)
682 {
683 default:
684 wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
685 // fall through
686
687 case wxMOUSE_BTN_ANY:
688 return ButtonUp(wxMOUSE_BTN_ANY) ||
689 ButtonDown(wxMOUSE_BTN_ANY) ||
690 ButtonDClick(wxMOUSE_BTN_ANY);
691
692 case wxMOUSE_BTN_LEFT:
693 return LeftDown() || LeftUp() || LeftDClick();
694
695 case wxMOUSE_BTN_MIDDLE:
696 return MiddleDown() || MiddleUp() || MiddleDClick();
697
698 case wxMOUSE_BTN_RIGHT:
699 return RightDown() || RightUp() || RightDClick();
700
701 case wxMOUSE_BTN_AUX1:
702 return Aux1Down() || Aux1Up() || Aux1DClick();
703
704 case wxMOUSE_BTN_AUX2:
705 return Aux2Down() || Aux2Up() || Aux2DClick();
706 }
707 }
708
709 int wxMouseEvent::GetButton() const
710 {
711 for ( int i = 1; i < wxMOUSE_BTN_MAX; i++ )
712 {
713 if ( Button(i) )
714 {
715 return i;
716 }
717 }
718
719 return wxMOUSE_BTN_NONE;
720 }
721
722 // Find the logical position of the event given the DC
723 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
724 {
725 wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
726 return pt;
727 }
728
729 // ----------------------------------------------------------------------------
730 // wxKeyEvent
731 // ----------------------------------------------------------------------------
732
733 wxKeyEvent::wxKeyEvent(wxEventType type)
734 {
735 m_eventType = type;
736 m_keyCode = 0;
737 #if wxUSE_UNICODE
738 m_uniChar = 0;
739 #endif
740 }
741
742 wxKeyEvent::wxKeyEvent(const wxKeyEvent& evt)
743 : wxEvent(evt),
744 wxKeyboardState(evt)
745 {
746 m_x = evt.m_x;
747 m_y = evt.m_y;
748
749 m_keyCode = evt.m_keyCode;
750 m_rawCode = evt.m_rawCode;
751 m_rawFlags = evt.m_rawFlags;
752
753 #if wxUSE_UNICODE
754 m_uniChar = evt.m_uniChar;
755 #endif
756 }
757
758 bool wxKeyEvent::IsKeyInCategory(int category) const
759 {
760 switch ( GetKeyCode() )
761 {
762 case WXK_LEFT:
763 case WXK_RIGHT:
764 case WXK_UP:
765 case WXK_DOWN:
766 case WXK_NUMPAD_LEFT:
767 case WXK_NUMPAD_RIGHT:
768 case WXK_NUMPAD_UP:
769 case WXK_NUMPAD_DOWN:
770 return (category & WXK_CATEGORY_ARROW) != 0;
771
772 case WXK_PAGEDOWN:
773 case WXK_END:
774 case WXK_NUMPAD_PAGEUP:
775 case WXK_NUMPAD_PAGEDOWN:
776 return (category & WXK_CATEGORY_PAGING) != 0;
777
778 case WXK_HOME:
779 case WXK_PAGEUP:
780 case WXK_NUMPAD_HOME:
781 case WXK_NUMPAD_END:
782 return (category & WXK_CATEGORY_JUMP) != 0;
783
784 case WXK_TAB:
785 case WXK_NUMPAD_TAB:
786 return (category & WXK_CATEGORY_TAB) != 0;
787
788 case WXK_BACK:
789 case WXK_DELETE:
790 case WXK_NUMPAD_DELETE:
791 return (category & WXK_CATEGORY_CUT) != 0;
792
793 default:
794 return false;
795 }
796 }
797
798 // ----------------------------------------------------------------------------
799 // wxWindowCreateEvent
800 // ----------------------------------------------------------------------------
801
802 wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
803 {
804 SetEventType(wxEVT_CREATE);
805 SetEventObject(win);
806 }
807
808 // ----------------------------------------------------------------------------
809 // wxWindowDestroyEvent
810 // ----------------------------------------------------------------------------
811
812 wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
813 {
814 SetEventType(wxEVT_DESTROY);
815 SetEventObject(win);
816 }
817
818 // ----------------------------------------------------------------------------
819 // wxChildFocusEvent
820 // ----------------------------------------------------------------------------
821
822 wxChildFocusEvent::wxChildFocusEvent(wxWindow *win)
823 : wxCommandEvent(wxEVT_CHILD_FOCUS)
824 {
825 SetEventObject(win);
826 }
827
828 // ----------------------------------------------------------------------------
829 // wxHelpEvent
830 // ----------------------------------------------------------------------------
831
832 /* static */
833 wxHelpEvent::Origin wxHelpEvent::GuessOrigin(Origin origin)
834 {
835 if ( origin == Origin_Unknown )
836 {
837 // assume that the event comes from the help button if it's not from
838 // keyboard and that pressing F1 always results in the help event
839 origin = wxGetKeyState(WXK_F1) ? Origin_Keyboard : Origin_HelpButton;
840 }
841
842 return origin;
843 }
844
845 #endif // wxUSE_GUI
846
847
848 #if wxUSE_BASE
849
850 // ----------------------------------------------------------------------------
851 // wxEventHashTable
852 // ----------------------------------------------------------------------------
853
854 static const int EVENT_TYPE_TABLE_INIT_SIZE = 31; // Not too big not too small...
855
856 wxEventHashTable* wxEventHashTable::sm_first = NULL;
857
858 wxEventHashTable::wxEventHashTable(const wxEventTable &table)
859 : m_table(table),
860 m_rebuildHash(true)
861 {
862 AllocEventTypeTable(EVENT_TYPE_TABLE_INIT_SIZE);
863
864 m_next = sm_first;
865 if (m_next)
866 m_next->m_previous = this;
867 sm_first = this;
868 }
869
870 wxEventHashTable::~wxEventHashTable()
871 {
872 if (m_next)
873 m_next->m_previous = m_previous;
874 if (m_previous)
875 m_previous->m_next = m_next;
876 if (sm_first == this)
877 sm_first = m_next;
878
879 Clear();
880 }
881
882 void wxEventHashTable::Clear()
883 {
884 for ( size_t i = 0; i < m_size; i++ )
885 {
886 EventTypeTablePointer eTTnode = m_eventTypeTable[i];
887 delete eTTnode;
888 }
889
890 wxDELETEA(m_eventTypeTable);
891
892 m_size = 0;
893 }
894
895 #if wxUSE_MEMORY_TRACING
896
897 // Clear all tables
898 void wxEventHashTable::ClearAll()
899 {
900 wxEventHashTable* table = sm_first;
901 while (table)
902 {
903 table->Clear();
904 table = table->m_next;
905 }
906 }
907
908 #endif // wxUSE_MEMORY_TRACING
909
910 bool wxEventHashTable::HandleEvent(wxEvent &event, wxEvtHandler *self)
911 {
912 if (m_rebuildHash)
913 {
914 InitHashTable();
915 m_rebuildHash = false;
916 }
917
918 if (!m_eventTypeTable)
919 return false;
920
921 // Find all entries for the given event type.
922 wxEventType eventType = event.GetEventType();
923 const EventTypeTablePointer eTTnode = m_eventTypeTable[eventType % m_size];
924 if (eTTnode && eTTnode->eventType == eventType)
925 {
926 // Now start the search for an event handler
927 // that can handle an event with the given ID.
928 const wxEventTableEntryPointerArray&
929 eventEntryTable = eTTnode->eventEntryTable;
930
931 const size_t count = eventEntryTable.GetCount();
932 for (size_t n = 0; n < count; n++)
933 {
934 const wxEventTableEntry& entry = *eventEntryTable[n];
935 if ( wxEvtHandler::ProcessEventIfMatchesId(entry, self, event) )
936 return true;
937 }
938 }
939
940 return false;
941 }
942
943 void wxEventHashTable::InitHashTable()
944 {
945 // Loop over the event tables and all its base tables.
946 const wxEventTable *table = &m_table;
947 while (table)
948 {
949 // Retrieve all valid event handler entries
950 const wxEventTableEntry *entry = table->entries;
951 while (entry->m_fn != 0)
952 {
953 // Add the event entry in the Hash.
954 AddEntry(*entry);
955
956 entry++;
957 }
958
959 table = table->baseTable;
960 }
961
962 // Lets free some memory.
963 size_t i;
964 for(i = 0; i < m_size; i++)
965 {
966 EventTypeTablePointer eTTnode = m_eventTypeTable[i];
967 if (eTTnode)
968 {
969 eTTnode->eventEntryTable.Shrink();
970 }
971 }
972 }
973
974 void wxEventHashTable::AddEntry(const wxEventTableEntry &entry)
975 {
976 // This might happen 'accidentally' as the app is exiting
977 if (!m_eventTypeTable)
978 return;
979
980 EventTypeTablePointer *peTTnode = &m_eventTypeTable[entry.m_eventType % m_size];
981 EventTypeTablePointer eTTnode = *peTTnode;
982
983 if (eTTnode)
984 {
985 if (eTTnode->eventType != entry.m_eventType)
986 {
987 // Resize the table!
988 GrowEventTypeTable();
989 // Try again to add it.
990 AddEntry(entry);
991 return;
992 }
993 }
994 else
995 {
996 eTTnode = new EventTypeTable;
997 eTTnode->eventType = entry.m_eventType;
998 *peTTnode = eTTnode;
999 }
1000
1001 // Fill all hash entries between entry.m_id and entry.m_lastId...
1002 eTTnode->eventEntryTable.Add(&entry);
1003 }
1004
1005 void wxEventHashTable::AllocEventTypeTable(size_t size)
1006 {
1007 m_eventTypeTable = new EventTypeTablePointer[size];
1008 memset((void *)m_eventTypeTable, 0, sizeof(EventTypeTablePointer)*size);
1009 m_size = size;
1010 }
1011
1012 void wxEventHashTable::GrowEventTypeTable()
1013 {
1014 size_t oldSize = m_size;
1015 EventTypeTablePointer *oldEventTypeTable = m_eventTypeTable;
1016
1017 // TODO: Search the most optimal grow sequence
1018 AllocEventTypeTable(/* GetNextPrime(oldSize) */oldSize*2+1);
1019
1020 for ( size_t i = 0; i < oldSize; /* */ )
1021 {
1022 EventTypeTablePointer eTToldNode = oldEventTypeTable[i];
1023 if (eTToldNode)
1024 {
1025 EventTypeTablePointer *peTTnode = &m_eventTypeTable[eTToldNode->eventType % m_size];
1026 EventTypeTablePointer eTTnode = *peTTnode;
1027
1028 // Check for collision, we don't want any.
1029 if (eTTnode)
1030 {
1031 GrowEventTypeTable();
1032 continue; // Don't increment the counter,
1033 // as we still need to add this element.
1034 }
1035 else
1036 {
1037 // Get the old value and put it in the new table.
1038 *peTTnode = oldEventTypeTable[i];
1039 }
1040 }
1041
1042 i++;
1043 }
1044
1045 delete[] oldEventTypeTable;
1046 }
1047
1048 // ----------------------------------------------------------------------------
1049 // wxEvtHandler
1050 // ----------------------------------------------------------------------------
1051
1052 wxEvtHandler::wxEvtHandler()
1053 {
1054 m_nextHandler = NULL;
1055 m_previousHandler = NULL;
1056 m_enabled = true;
1057 m_dynamicEvents = NULL;
1058 m_pendingEvents = NULL;
1059
1060 // no client data (yet)
1061 m_clientData = NULL;
1062 m_clientDataType = wxClientData_None;
1063 }
1064
1065 wxEvtHandler::~wxEvtHandler()
1066 {
1067 Unlink();
1068
1069 if (m_dynamicEvents)
1070 {
1071 for ( wxList::iterator it = m_dynamicEvents->begin(),
1072 end = m_dynamicEvents->end();
1073 it != end;
1074 ++it )
1075 {
1076 wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)*it;
1077
1078 // Remove ourselves from sink destructor notifications
1079 // (this has usually been done, in wxTrackable destructor)
1080 wxEvtHandler *eventSink = entry->m_fn->GetEvtHandler();
1081 if ( eventSink )
1082 {
1083 wxEventConnectionRef * const
1084 evtConnRef = FindRefInTrackerList(eventSink);
1085 if ( evtConnRef )
1086 {
1087 eventSink->RemoveNode(evtConnRef);
1088 delete evtConnRef;
1089 }
1090 }
1091
1092 delete entry->m_callbackUserData;
1093 delete entry;
1094 }
1095 delete m_dynamicEvents;
1096 }
1097
1098 // Remove us from the list of the pending events if necessary.
1099 if (wxTheApp)
1100 wxTheApp->RemovePendingEventHandler(this);
1101
1102 DeletePendingEvents();
1103
1104 // we only delete object data, not untyped
1105 if ( m_clientDataType == wxClientData_Object )
1106 delete m_clientObject;
1107 }
1108
1109 void wxEvtHandler::Unlink()
1110 {
1111 // this event handler must take itself out of the chain of handlers:
1112
1113 if (m_previousHandler)
1114 m_previousHandler->SetNextHandler(m_nextHandler);
1115
1116 if (m_nextHandler)
1117 m_nextHandler->SetPreviousHandler(m_previousHandler);
1118
1119 m_nextHandler = NULL;
1120 m_previousHandler = NULL;
1121 }
1122
1123 bool wxEvtHandler::IsUnlinked() const
1124 {
1125 return m_previousHandler == NULL &&
1126 m_nextHandler == NULL;
1127 }
1128
1129 #if wxUSE_THREADS
1130
1131 bool wxEvtHandler::ProcessThreadEvent(const wxEvent& event)
1132 {
1133 // check that we are really in a child thread
1134 wxASSERT_MSG( !wxThread::IsMain(),
1135 wxT("use ProcessEvent() in main thread") );
1136
1137 AddPendingEvent(event);
1138
1139 return true;
1140 }
1141
1142 #endif // wxUSE_THREADS
1143
1144 void wxEvtHandler::QueueEvent(wxEvent *event)
1145 {
1146 wxCHECK_RET( event, "NULL event can't be posted" );
1147
1148 if (!wxTheApp)
1149 {
1150 // we need an event loop which manages the list of event handlers with
1151 // pending events... cannot proceed without it!
1152 wxLogDebug("No application object! Cannot queue this event!");
1153
1154 // anyway delete the given event to avoid memory leaks
1155 delete event;
1156
1157 return;
1158 }
1159
1160 // 1) Add this event to our list of pending events
1161 wxENTER_CRIT_SECT( m_pendingEventsLock );
1162
1163 if ( !m_pendingEvents )
1164 m_pendingEvents = new wxList;
1165
1166 m_pendingEvents->Append(event);
1167
1168 // 2) Add this event handler to list of event handlers that
1169 // have pending events.
1170
1171 wxTheApp->AppendPendingEventHandler(this);
1172
1173 // only release m_pendingEventsLock now because otherwise there is a race
1174 // condition as described in the ticket #9093: we could process the event
1175 // just added to m_pendingEvents in our ProcessPendingEvents() below before
1176 // we had time to append this pointer to wxHandlersWithPendingEvents list; thus
1177 // breaking the invariant that a handler should be in the list iff it has
1178 // any pending events to process
1179 wxLEAVE_CRIT_SECT( m_pendingEventsLock );
1180
1181 // 3) Inform the system that new pending events are somewhere,
1182 // and that these should be processed in idle time.
1183 wxWakeUpIdle();
1184 }
1185
1186 void wxEvtHandler::DeletePendingEvents()
1187 {
1188 if (m_pendingEvents)
1189 m_pendingEvents->DeleteContents(true);
1190 wxDELETE(m_pendingEvents);
1191 }
1192
1193 void wxEvtHandler::ProcessPendingEvents()
1194 {
1195 if (!wxTheApp)
1196 {
1197 // we need an event loop which manages the list of event handlers with
1198 // pending events... cannot proceed without it!
1199 wxLogDebug("No application object! Cannot process pending events!");
1200 return;
1201 }
1202
1203 // we need to process only a single pending event in this call because
1204 // each call to ProcessEvent() could result in the destruction of this
1205 // same event handler (see the comment at the end of this function)
1206
1207 wxENTER_CRIT_SECT( m_pendingEventsLock );
1208
1209 // this method is only called by wxApp if this handler does have
1210 // pending events
1211 wxCHECK_RET( m_pendingEvents && !m_pendingEvents->IsEmpty(),
1212 "should have pending events if called" );
1213
1214 wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
1215 wxEvent* pEvent = static_cast<wxEvent *>(node->GetData());
1216
1217 // find the first event which can be processed now:
1218 wxEventLoopBase* evtLoop = wxEventLoopBase::GetActive();
1219 if (evtLoop && evtLoop->IsYielding())
1220 {
1221 while (node && pEvent && !evtLoop->IsEventAllowedInsideYield(pEvent->GetEventCategory()))
1222 {
1223 node = node->GetNext();
1224 pEvent = node ? static_cast<wxEvent *>(node->GetData()) : NULL;
1225 }
1226
1227 if (!node)
1228 {
1229 // all our events are NOT processable now... signal this:
1230 wxTheApp->DelayPendingEventHandler(this);
1231
1232 // see the comment at the beginning of evtloop.h header for the
1233 // logic behind YieldFor() and behind DelayPendingEventHandler()
1234
1235 wxLEAVE_CRIT_SECT( m_pendingEventsLock );
1236
1237 return;
1238 }
1239 }
1240
1241 wxEventPtr event(pEvent);
1242
1243 // it's important we remove event from list before processing it, else a
1244 // nested event loop, for example from a modal dialog, might process the
1245 // same event again.
1246 m_pendingEvents->Erase(node);
1247
1248 if ( m_pendingEvents->IsEmpty() )
1249 {
1250 // if there are no more pending events left, we don't need to
1251 // stay in this list
1252 wxTheApp->RemovePendingEventHandler(this);
1253 }
1254
1255 wxLEAVE_CRIT_SECT( m_pendingEventsLock );
1256
1257 ProcessEvent(*event);
1258
1259 // careful: this object could have been deleted by the event handler
1260 // executed by the above ProcessEvent() call, so we can't access any fields
1261 // of this object any more
1262 }
1263
1264 /* static */
1265 bool wxEvtHandler::ProcessEventIfMatchesId(const wxEventTableEntryBase& entry,
1266 wxEvtHandler *handler,
1267 wxEvent& event)
1268 {
1269 int tableId1 = entry.m_id,
1270 tableId2 = entry.m_lastId;
1271
1272 // match only if the event type is the same and the id is either -1 in
1273 // the event table (meaning "any") or the event id matches the id
1274 // specified in the event table either exactly or by falling into
1275 // range between first and last
1276 if ((tableId1 == wxID_ANY) ||
1277 (tableId2 == wxID_ANY && tableId1 == event.GetId()) ||
1278 (tableId2 != wxID_ANY &&
1279 (event.GetId() >= tableId1 && event.GetId() <= tableId2)))
1280 {
1281 event.Skip(false);
1282 event.m_callbackUserData = entry.m_callbackUserData;
1283
1284 #if wxUSE_EXCEPTIONS
1285 if ( wxTheApp )
1286 {
1287 // call the handler via wxApp method which allows the user to catch
1288 // any exceptions which may be thrown by any handler in the program
1289 // in one place
1290 wxTheApp->CallEventHandler(handler, *entry.m_fn, event);
1291 }
1292 else
1293 #endif // wxUSE_EXCEPTIONS
1294 {
1295 (*entry.m_fn)(handler, event);
1296 }
1297
1298 if (!event.GetSkipped())
1299 return true;
1300 }
1301
1302 return false;
1303 }
1304
1305 bool wxEvtHandler::DoTryApp(wxEvent& event)
1306 {
1307 if ( wxTheApp && (this != wxTheApp) )
1308 {
1309 // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
1310 // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
1311 // processed appropriately via SearchEventTable.
1312 if ( event.GetEventType() != wxEVT_IDLE )
1313 {
1314 if ( wxTheApp->ProcessEvent(event) )
1315 return true;
1316 }
1317 }
1318
1319 return false;
1320 }
1321
1322 bool wxEvtHandler::TryBefore(wxEvent& event)
1323 {
1324 #if WXWIN_COMPATIBILITY_2_8
1325 // call the old virtual function to keep the code overriding it working
1326 return TryValidator(event);
1327 #else
1328 wxUnusedVar(event);
1329 return false;
1330 #endif
1331 }
1332
1333 bool wxEvtHandler::TryAfter(wxEvent& event)
1334 {
1335 // We only want to pass the window to the application object once even if
1336 // there are several chained handlers. Ensure that this is what happens by
1337 // only calling DoTryApp() if there is no next handler (which would do it).
1338 //
1339 // Notice that, unlike simply calling TryAfter() on the last handler in the
1340 // chain only from ProcessEvent(), this also works with wxWindow object in
1341 // the middle of the chain: its overridden TryAfter() will still be called
1342 // and propagate the event upwards the window hierarchy even if it's not
1343 // the last one in the chain (which, admittedly, shouldn't happen often).
1344 if ( GetNextHandler() )
1345 return GetNextHandler()->TryAfter(event);
1346
1347 #if WXWIN_COMPATIBILITY_2_8
1348 // as above, call the old virtual function for compatibility
1349 return TryParent(event);
1350 #else
1351 return DoTryApp(event);
1352 #endif
1353 }
1354
1355 bool wxEvtHandler::ProcessEvent(wxEvent& event)
1356 {
1357 // The very first thing we do is to allow the application to hook into
1358 // event processing in order to globally pre-process all events.
1359 //
1360 // Note that we should only do it if we're the first event handler called
1361 // to avoid calling FilterEvent() multiple times as the event goes through
1362 // the event handler chain and possibly upwards the window hierarchy.
1363 if ( !event.WasProcessed() )
1364 {
1365 if ( wxTheApp )
1366 {
1367 int rc = wxTheApp->FilterEvent(event);
1368 if ( rc != -1 )
1369 {
1370 wxASSERT_MSG( rc == 1 || rc == 0,
1371 "unexpected wxApp::FilterEvent return value" );
1372
1373 return rc != 0;
1374 }
1375 //else: proceed normally
1376 }
1377 }
1378
1379 // Short circuit the event processing logic if we're requested to process
1380 // this event in this handler only, see DoTryChain() for more details.
1381 if ( event.ShouldProcessOnlyIn(this) )
1382 return TryHere(event);
1383
1384
1385 // Try to process the event in this handler itself.
1386 if ( ProcessEventLocally(event) )
1387 {
1388 // It is possible that DoTryChain() called from ProcessEventLocally()
1389 // returned true but the event was not really processed: this happens
1390 // if a custom handler ignores the request to process the event in this
1391 // handler only and in this case we should skip the post processing
1392 // done in TryAfter() but still return the correct value ourselves to
1393 // indicate whether we did or did not find a handler for this event.
1394 return !event.GetSkipped();
1395 }
1396
1397 // If we still didn't find a handler, propagate the event upwards the
1398 // window chain and/or to the application object.
1399 if ( TryAfter(event) )
1400 return true;
1401
1402
1403 // No handler found anywhere, bail out.
1404 return false;
1405 }
1406
1407 bool wxEvtHandler::ProcessEventLocally(wxEvent& event)
1408 {
1409 // First try the hooks which should be called before our own handlers
1410 if ( TryBefore(event) )
1411 return true;
1412
1413 // Then try this handler itself, notice that we should not call
1414 // ProcessEvent() on this one as we're already called from it, which
1415 // explains why we do it here and not in DoTryChain()
1416 if ( TryHere(event) )
1417 return true;
1418
1419 // Finally try the event handlers chained to this one,
1420 if ( DoTryChain(event) )
1421 return true;
1422
1423 // And return false to indicate that we didn't find any handler at this
1424 // level.
1425 return false;
1426 }
1427
1428 bool wxEvtHandler::DoTryChain(wxEvent& event)
1429 {
1430 for ( wxEvtHandler *h = GetNextHandler(); h; h = h->GetNextHandler() )
1431 {
1432 // We need to process this event at the level of this handler only
1433 // right now, the pre-/post-processing was either already done by
1434 // ProcessEvent() from which we were called or will be done by it when
1435 // we return.
1436 //
1437 // However we must call ProcessEvent() and not TryHere() because the
1438 // existing code (including some in wxWidgets itself) expects the
1439 // overridden ProcessEvent() in its custom event handlers pushed on a
1440 // window to be called.
1441 //
1442 // So we must call ProcessEvent() but it must not do what it usually
1443 // does. To resolve this paradox we set up a special flag inside the
1444 // object itself to let ProcessEvent() know that it shouldn't do any
1445 // pre/post-processing for this event if it gets it. Note that this
1446 // only applies to this handler, if the event is passed to another one
1447 // by explicitly calling its ProcessEvent(), pre/post-processing should
1448 // be done as usual.
1449 //
1450 // Final complication is that if the implementation of ProcessEvent()
1451 // called wxEvent::DidntHonourProcessOnlyIn() (as the gross hack that
1452 // is wxScrollHelperEvtHandler::ProcessEvent() does) and ignored our
1453 // request to process event in this handler only, we have to compensate
1454 // for it by not processing the event further because this was already
1455 // done by that rogue event handler.
1456 wxEventProcessInHandlerOnly processInHandlerOnly(event, h);
1457 if ( h->ProcessEvent(event) )
1458 {
1459 // Make sure "skipped" flag is not set as the event was really
1460 // processed in this case. Normally it shouldn't be set anyhow but
1461 // make sure just in case the user code does something strange.
1462 event.Skip(false);
1463
1464 return true;
1465 }
1466
1467 if ( !event.ShouldProcessOnlyIn(h) )
1468 {
1469 // Still return true to indicate that no further processing should
1470 // be undertaken but ensure that "skipped" flag is set so that the
1471 // caller knows that the event was not really processed.
1472 event.Skip();
1473
1474 return true;
1475 }
1476 }
1477
1478 return false;
1479 }
1480
1481 bool wxEvtHandler::TryHere(wxEvent& event)
1482 {
1483 // If the event handler is disabled it doesn't process any events
1484 if ( !GetEvtHandlerEnabled() )
1485 return false;
1486
1487 // Handle per-instance dynamic event tables first
1488 if ( m_dynamicEvents && SearchDynamicEventTable(event) )
1489 return true;
1490
1491 // Then static per-class event tables
1492 if ( GetEventHashTable().HandleEvent(event, this) )
1493 return true;
1494
1495 // We don't have a handler for this event.
1496 return false;
1497 }
1498
1499 bool wxEvtHandler::SafelyProcessEvent(wxEvent& event)
1500 {
1501 #if wxUSE_EXCEPTIONS
1502 try
1503 {
1504 #endif
1505 return ProcessEvent(event);
1506 #if wxUSE_EXCEPTIONS
1507 }
1508 catch ( ... )
1509 {
1510 // notice that we do it in 2 steps to avoid warnings about possibly
1511 // uninitialized loop variable from some versions of g++ which are not
1512 // smart enough to figure out that GetActive() doesn't throw and so
1513 // that loop will always be initialized
1514 wxEventLoopBase *loop = NULL;
1515 try
1516 {
1517 loop = wxEventLoopBase::GetActive();
1518
1519 if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() )
1520 {
1521 if ( loop )
1522 loop->Exit();
1523 }
1524 //else: continue running current event loop
1525
1526 return false;
1527 }
1528 catch ( ... )
1529 {
1530 // OnExceptionInMainLoop() threw, possibly rethrowing the same
1531 // exception again: very good, but we still need Exit() to
1532 // be called
1533 if ( loop )
1534 loop->Exit();
1535 throw;
1536 }
1537 }
1538 #endif // wxUSE_EXCEPTIONS
1539 }
1540
1541 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
1542 {
1543 const wxEventType eventType = event.GetEventType();
1544 for ( int i = 0; table.entries[i].m_fn != 0; i++ )
1545 {
1546 const wxEventTableEntry& entry = table.entries[i];
1547 if ( eventType == entry.m_eventType )
1548 {
1549 if ( ProcessEventIfMatchesId(entry, this, event) )
1550 return true;
1551 }
1552 }
1553
1554 return false;
1555 }
1556
1557 void wxEvtHandler::DoBind(int id,
1558 int lastId,
1559 wxEventType eventType,
1560 wxEventFunctor *func,
1561 wxObject *userData)
1562 {
1563 wxDynamicEventTableEntry *entry =
1564 new wxDynamicEventTableEntry(eventType, id, lastId, func, userData);
1565
1566 if (!m_dynamicEvents)
1567 m_dynamicEvents = new wxList;
1568
1569 // Insert at the front of the list so most recent additions are found first
1570 m_dynamicEvents->Insert( (wxObject*) entry );
1571
1572 // Make sure we get to know when a sink is destroyed
1573 wxEvtHandler *eventSink = func->GetEvtHandler();
1574 if ( eventSink && eventSink != this )
1575 {
1576 wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
1577 if ( evtConnRef )
1578 evtConnRef->IncRef( );
1579 else
1580 new wxEventConnectionRef(this, eventSink);
1581 }
1582 }
1583
1584 bool
1585 wxEvtHandler::DoUnbind(int id,
1586 int lastId,
1587 wxEventType eventType,
1588 const wxEventFunctor& func,
1589 wxObject *userData)
1590 {
1591 if (!m_dynamicEvents)
1592 return false;
1593
1594 // Remove connection from tracker node (wxEventConnectionRef)
1595 wxEvtHandler *eventSink = func.GetEvtHandler();
1596 if ( eventSink && eventSink != this )
1597 {
1598 wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
1599 if ( evtConnRef )
1600 evtConnRef->DecRef();
1601 }
1602
1603 wxList::compatibility_iterator node = m_dynamicEvents->GetFirst();
1604 while (node)
1605 {
1606 wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
1607
1608 if ((entry->m_id == id) &&
1609 ((entry->m_lastId == lastId) || (lastId == wxID_ANY)) &&
1610 ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
1611 entry->m_fn->IsMatching(func) &&
1612 ((entry->m_callbackUserData == userData) || !userData))
1613 {
1614 delete entry->m_callbackUserData;
1615 m_dynamicEvents->Erase( node );
1616 delete entry;
1617 return true;
1618 }
1619 node = node->GetNext();
1620 }
1621 return false;
1622 }
1623
1624 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
1625 {
1626 wxCHECK_MSG( m_dynamicEvents, false,
1627 wxT("caller should check that we have dynamic events") );
1628
1629 wxList::compatibility_iterator node = m_dynamicEvents->GetFirst();
1630 while (node)
1631 {
1632 wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
1633
1634 // get next node before (maybe) calling the event handler as it could
1635 // call Disconnect() invalidating the current node
1636 node = node->GetNext();
1637
1638 if ( event.GetEventType() == entry->m_eventType )
1639 {
1640 wxEvtHandler *handler = entry->m_fn->GetEvtHandler();
1641 if ( !handler )
1642 handler = this;
1643 if ( ProcessEventIfMatchesId(*entry, handler, event) )
1644 return true;
1645 }
1646 }
1647
1648 return false;
1649 }
1650
1651 void wxEvtHandler::DoSetClientObject( wxClientData *data )
1652 {
1653 wxASSERT_MSG( m_clientDataType != wxClientData_Void,
1654 wxT("can't have both object and void client data") );
1655
1656 if ( m_clientObject )
1657 delete m_clientObject;
1658
1659 m_clientObject = data;
1660 m_clientDataType = wxClientData_Object;
1661 }
1662
1663 wxClientData *wxEvtHandler::DoGetClientObject() const
1664 {
1665 // it's not an error to call GetClientObject() on a window which doesn't
1666 // have client data at all - NULL will be returned
1667 wxASSERT_MSG( m_clientDataType != wxClientData_Void,
1668 wxT("this window doesn't have object client data") );
1669
1670 return m_clientObject;
1671 }
1672
1673 void wxEvtHandler::DoSetClientData( void *data )
1674 {
1675 wxASSERT_MSG( m_clientDataType != wxClientData_Object,
1676 wxT("can't have both object and void client data") );
1677
1678 m_clientData = data;
1679 m_clientDataType = wxClientData_Void;
1680 }
1681
1682 void *wxEvtHandler::DoGetClientData() const
1683 {
1684 // it's not an error to call GetClientData() on a window which doesn't have
1685 // client data at all - NULL will be returned
1686 wxASSERT_MSG( m_clientDataType != wxClientData_Object,
1687 wxT("this window doesn't have void client data") );
1688
1689 return m_clientData;
1690 }
1691
1692 // A helper to find an wxEventConnectionRef object
1693 wxEventConnectionRef *
1694 wxEvtHandler::FindRefInTrackerList(wxEvtHandler *eventSink)
1695 {
1696 for ( wxTrackerNode *node = eventSink->GetFirst(); node; node = node->m_nxt )
1697 {
1698 // we only want wxEventConnectionRef nodes here
1699 wxEventConnectionRef *evtConnRef = node->ToEventConnection();
1700 if ( evtConnRef && evtConnRef->m_src == this )
1701 {
1702 wxASSERT( evtConnRef->m_sink==eventSink );
1703 return evtConnRef;
1704 }
1705 }
1706
1707 return NULL;
1708 }
1709
1710 void wxEvtHandler::OnSinkDestroyed( wxEvtHandler *sink )
1711 {
1712 wxASSERT(m_dynamicEvents);
1713
1714 // remove all connections with this sink
1715 wxList::compatibility_iterator node = m_dynamicEvents->GetFirst(), node_nxt;
1716 while (node)
1717 {
1718 wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
1719 node_nxt = node->GetNext();
1720
1721 if ( entry->m_fn->GetEvtHandler() == sink )
1722 {
1723 delete entry->m_callbackUserData;
1724 m_dynamicEvents->Erase( node );
1725 delete entry;
1726 }
1727 node = node_nxt;
1728 }
1729 }
1730
1731 #endif // wxUSE_BASE
1732
1733 #if wxUSE_GUI
1734
1735 // Find a window with the focus, that is also a descendant of the given window.
1736 // This is used to determine the window to initially send commands to.
1737 wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
1738 {
1739 // Process events starting with the window with the focus, if any.
1740 wxWindow* focusWin = wxWindow::FindFocus();
1741 wxWindow* win = focusWin;
1742
1743 // Check if this is a descendant of this frame.
1744 // If not, win will be set to NULL.
1745 while (win)
1746 {
1747 if (win == ancestor)
1748 break;
1749 else
1750 win = win->GetParent();
1751 }
1752 if (win == NULL)
1753 focusWin = NULL;
1754
1755 return focusWin;
1756 }
1757
1758 // ----------------------------------------------------------------------------
1759 // wxEventBlocker
1760 // ----------------------------------------------------------------------------
1761
1762 wxEventBlocker::wxEventBlocker(wxWindow *win, wxEventType type)
1763 {
1764 wxCHECK_RET(win, wxT("Null window given to wxEventBlocker"));
1765
1766 m_window = win;
1767
1768 Block(type);
1769 m_window->PushEventHandler(this);
1770 }
1771
1772 wxEventBlocker::~wxEventBlocker()
1773 {
1774 wxEvtHandler *popped = m_window->PopEventHandler(false);
1775 wxCHECK_RET(popped == this,
1776 wxT("Don't push other event handlers into a window managed by wxEventBlocker!"));
1777 }
1778
1779 bool wxEventBlocker::ProcessEvent(wxEvent& event)
1780 {
1781 // should this event be blocked?
1782 for ( size_t i = 0; i < m_eventsToBlock.size(); i++ )
1783 {
1784 wxEventType t = (wxEventType)m_eventsToBlock[i];
1785 if ( t == wxEVT_ANY || t == event.GetEventType() )
1786 return true; // yes, it should: mark this event as processed
1787 }
1788
1789 return false;
1790 }
1791
1792 #endif // wxUSE_GUI
1793
wxWidgets (Impactor)