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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: 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 and Markus Holzem | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #ifdef __GNUG__ | |
13 | #pragma implementation "event.h" | |
14 | #endif | |
15 | ||
16 | // For compilers that support precompilation, includes "wx.h". | |
17 | #include "wx/wxprec.h" | |
18 | ||
19 | #ifdef __BORLANDC__ | |
20 | #pragma hdrstop | |
21 | #endif | |
22 | ||
23 | #ifndef WX_PRECOMP | |
24 | #include "wx/defs.h" | |
25 | #include "wx/control.h" | |
26 | #include "wx/utils.h" | |
27 | #include "wx/app.h" | |
28 | #include "wx/dc.h" | |
29 | #endif | |
30 | ||
31 | #include "wx/event.h" | |
32 | #include "wx/validate.h" | |
33 | ||
34 | #if !USE_SHARED_LIBRARY | |
35 | IMPLEMENT_DYNAMIC_CLASS(wxEvtHandler, wxObject) | |
36 | IMPLEMENT_ABSTRACT_CLASS(wxEvent, wxObject) | |
37 | IMPLEMENT_DYNAMIC_CLASS(wxCommandEvent, wxEvent) | |
38 | IMPLEMENT_DYNAMIC_CLASS(wxScrollEvent, wxCommandEvent) | |
39 | IMPLEMENT_DYNAMIC_CLASS(wxMouseEvent, wxEvent) | |
40 | IMPLEMENT_DYNAMIC_CLASS(wxKeyEvent, wxEvent) | |
41 | IMPLEMENT_DYNAMIC_CLASS(wxSizeEvent, wxEvent) | |
42 | IMPLEMENT_DYNAMIC_CLASS(wxPaintEvent, wxEvent) | |
43 | IMPLEMENT_DYNAMIC_CLASS(wxEraseEvent, wxEvent) | |
44 | IMPLEMENT_DYNAMIC_CLASS(wxMoveEvent, wxEvent) | |
45 | IMPLEMENT_DYNAMIC_CLASS(wxFocusEvent, wxEvent) | |
46 | IMPLEMENT_DYNAMIC_CLASS(wxCloseEvent, wxEvent) | |
47 | IMPLEMENT_DYNAMIC_CLASS(wxShowEvent, wxEvent) | |
48 | IMPLEMENT_DYNAMIC_CLASS(wxMaximizeEvent, wxEvent) | |
49 | IMPLEMENT_DYNAMIC_CLASS(wxIconizeEvent, wxEvent) | |
50 | IMPLEMENT_DYNAMIC_CLASS(wxMenuEvent, wxEvent) | |
51 | IMPLEMENT_DYNAMIC_CLASS(wxJoystickEvent, wxEvent) | |
52 | IMPLEMENT_DYNAMIC_CLASS(wxDropFilesEvent, wxEvent) | |
53 | IMPLEMENT_DYNAMIC_CLASS(wxActivateEvent, wxEvent) | |
54 | IMPLEMENT_DYNAMIC_CLASS(wxInitDialogEvent, wxEvent) | |
55 | IMPLEMENT_DYNAMIC_CLASS(wxSysColourChangedEvent, wxEvent) | |
56 | IMPLEMENT_DYNAMIC_CLASS(wxIdleEvent, wxEvent) | |
57 | IMPLEMENT_DYNAMIC_CLASS(wxUpdateUIEvent, wxCommandEvent) | |
58 | IMPLEMENT_DYNAMIC_CLASS(wxNavigationKeyEvent, wxCommandEvent) | |
59 | IMPLEMENT_DYNAMIC_CLASS(wxPaletteChangedEvent, wxEvent) | |
60 | IMPLEMENT_DYNAMIC_CLASS(wxQueryNewPaletteEvent, wxEvent) | |
61 | ||
62 | const wxEventTable *wxEvtHandler::GetEventTable() const { return &wxEvtHandler::sm_eventTable; } | |
63 | ||
64 | const wxEventTable wxEvtHandler::sm_eventTable = | |
65 | { (const wxEventTable *) NULL, &wxEvtHandler::sm_eventTableEntries[0] }; | |
66 | ||
67 | const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] = { { 0, 0, 0, | |
68 | #ifdef __SGI_CC__ | |
69 | // stupid SGI compiler --- offer aug 98 | |
70 | 0L } | |
71 | #else | |
72 | NULL } | |
73 | #endif | |
74 | }; | |
75 | ||
76 | #endif | |
77 | ||
78 | /* | |
79 | * General wxWindows events, covering | |
80 | * all interesting things that might happen (button clicking, resizing, | |
81 | * setting text in widgets, etc.). | |
82 | * | |
83 | * For each completely new event type, derive a new event class. | |
84 | * | |
85 | */ | |
86 | ||
87 | wxEvent::wxEvent(int theId) | |
88 | { | |
89 | m_eventType = wxEVT_NULL; | |
90 | m_eventObject = (wxObject *) NULL; | |
91 | m_eventHandle = (char *) NULL; | |
92 | m_timeStamp = 0; | |
93 | m_id = theId; | |
94 | m_skipped = FALSE; | |
95 | m_callbackUserData = (wxObject *) NULL; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Command events | |
100 | * | |
101 | */ | |
102 | ||
103 | wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId) | |
104 | { | |
105 | m_eventType = commandType; | |
106 | m_clientData = (char *) NULL; | |
107 | m_clientObject = (wxClientData *) NULL; | |
108 | m_extraLong = 0; | |
109 | m_commandInt = 0; | |
110 | m_id = theId; | |
111 | m_commandString = (char *) NULL; | |
112 | } | |
113 | ||
114 | /* | |
115 | * Scroll events | |
116 | */ | |
117 | ||
118 | wxScrollEvent::wxScrollEvent(wxEventType commandType, int id, int pos, int orient): | |
119 | wxCommandEvent(commandType, id) | |
120 | { | |
121 | m_extraLong = orient; | |
122 | m_commandInt = pos; | |
123 | } | |
124 | ||
125 | ||
126 | /* | |
127 | * Mouse events | |
128 | * | |
129 | */ | |
130 | ||
131 | wxMouseEvent::wxMouseEvent(wxEventType commandType) | |
132 | { | |
133 | m_eventType = commandType; | |
134 | m_metaDown = FALSE; | |
135 | m_altDown = FALSE; | |
136 | m_controlDown = FALSE; | |
137 | m_shiftDown = FALSE; | |
138 | m_leftDown = FALSE; | |
139 | m_rightDown = FALSE; | |
140 | m_middleDown = FALSE; | |
141 | m_x = 0; | |
142 | m_y = 0; | |
143 | } | |
144 | ||
145 | // True if was a button dclick event (1 = left, 2 = middle, 3 = right) | |
146 | // or any button dclick event (but = -1) | |
147 | bool wxMouseEvent::ButtonDClick(int but) const | |
148 | { | |
149 | switch (but) { | |
150 | case -1: | |
151 | return (LeftDClick() || MiddleDClick() || RightDClick()); | |
152 | case 1: | |
153 | return LeftDClick(); | |
154 | case 2: | |
155 | return MiddleDClick(); | |
156 | case 3: | |
157 | return RightDClick(); | |
158 | default: | |
159 | return FALSE; | |
160 | } | |
161 | // NOTREACHED | |
162 | } | |
163 | ||
164 | // True if was a button down event (1 = left, 2 = middle, 3 = right) | |
165 | // or any button down event (but = -1) | |
166 | bool wxMouseEvent::ButtonDown(int but) const | |
167 | { | |
168 | switch (but) { | |
169 | case -1: | |
170 | return (LeftDown() || MiddleDown() || RightDown()); | |
171 | case 1: | |
172 | return LeftDown(); | |
173 | case 2: | |
174 | return MiddleDown(); | |
175 | case 3: | |
176 | return RightDown(); | |
177 | default: | |
178 | return FALSE; | |
179 | } | |
180 | // NOTREACHED | |
181 | } | |
182 | ||
183 | // True if was a button up event (1 = left, 2 = middle, 3 = right) | |
184 | // or any button up event (but = -1) | |
185 | bool wxMouseEvent::ButtonUp(int but) const | |
186 | { | |
187 | switch (but) { | |
188 | case -1: | |
189 | return (LeftUp() || MiddleUp() || RightUp()); | |
190 | case 1: | |
191 | return LeftUp(); | |
192 | case 2: | |
193 | return MiddleUp(); | |
194 | case 3: | |
195 | return RightUp(); | |
196 | default: | |
197 | return FALSE; | |
198 | } | |
199 | // NOTREACHED | |
200 | } | |
201 | ||
202 | // True if the given button is currently changing state | |
203 | bool wxMouseEvent::Button(int but) const | |
204 | { | |
205 | switch (but) { | |
206 | case -1: | |
207 | return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1)) ; | |
208 | case 1: | |
209 | return (LeftDown() || LeftUp() || LeftDClick()); | |
210 | case 2: | |
211 | return (MiddleDown() || MiddleUp() || MiddleDClick()); | |
212 | case 3: | |
213 | return (RightDown() || RightUp() || RightDClick()); | |
214 | default: | |
215 | return FALSE; | |
216 | } | |
217 | // NOTREACHED | |
218 | } | |
219 | ||
220 | bool wxMouseEvent::ButtonIsDown(int but) const | |
221 | { | |
222 | switch (but) { | |
223 | case -1: | |
224 | return (LeftIsDown() || MiddleIsDown() || RightIsDown()); | |
225 | case 1: | |
226 | return LeftIsDown(); | |
227 | case 2: | |
228 | return MiddleIsDown(); | |
229 | case 3: | |
230 | return RightIsDown(); | |
231 | default: | |
232 | return FALSE; | |
233 | } | |
234 | // NOTREACHED | |
235 | } | |
236 | ||
237 | // Find the logical position of the event given the DC | |
238 | wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const | |
239 | { | |
240 | wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y)); | |
241 | return pt; | |
242 | } | |
243 | ||
244 | ||
245 | /* | |
246 | * Keyboard events | |
247 | * | |
248 | */ | |
249 | ||
250 | wxKeyEvent::wxKeyEvent(wxEventType type) | |
251 | { | |
252 | m_eventType = type; | |
253 | m_shiftDown = FALSE; | |
254 | m_controlDown = FALSE; | |
255 | m_metaDown = FALSE; | |
256 | m_altDown = FALSE; | |
257 | m_keyCode = 0; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Event handler | |
262 | */ | |
263 | ||
264 | wxEvtHandler::wxEvtHandler(void) | |
265 | { | |
266 | m_nextHandler = (wxEvtHandler *) NULL; | |
267 | m_previousHandler = (wxEvtHandler *) NULL; | |
268 | m_enabled = TRUE; | |
269 | m_dynamicEvents = (wxList *) NULL; | |
270 | } | |
271 | ||
272 | wxEvtHandler::~wxEvtHandler(void) | |
273 | { | |
274 | // Takes itself out of the list of handlers | |
275 | if (m_previousHandler) | |
276 | m_previousHandler->m_nextHandler = m_nextHandler; | |
277 | ||
278 | if (m_nextHandler) | |
279 | m_nextHandler->m_previousHandler = m_previousHandler; | |
280 | ||
281 | if (m_dynamicEvents) | |
282 | { | |
283 | wxNode *node = m_dynamicEvents->First(); | |
284 | while (node) | |
285 | { | |
286 | wxEventTableEntry *entry = (wxEventTableEntry*)node->Data(); | |
287 | if (entry->m_callbackUserData) delete entry->m_callbackUserData; | |
288 | delete entry; | |
289 | node = node->Next(); | |
290 | } | |
291 | delete m_dynamicEvents; | |
292 | }; | |
293 | } | |
294 | ||
295 | /* | |
296 | * Event table stuff | |
297 | */ | |
298 | ||
299 | bool wxEvtHandler::ProcessEvent(wxEvent& event) | |
300 | { | |
301 | // An event handler can be enabled or disabled | |
302 | if ( GetEvtHandlerEnabled() ) | |
303 | { | |
304 | // Handle per-instance dynamic event tables first | |
305 | ||
306 | if (SearchDynamicEventTable( event )) return TRUE; | |
307 | ||
308 | // Then static per-class event tables | |
309 | ||
310 | const wxEventTable *table = GetEventTable(); | |
311 | ||
312 | // Try the associated validator first, if this is a window. | |
313 | // Problem: if the event handler of the window has been replaced, | |
314 | // this wxEvtHandler may no longer be a window. | |
315 | // Therefore validators won't be processed if the handler | |
316 | // has been replaced with SetEventHandler. | |
317 | // THIS CAN BE CURED if PushEventHandler is used instead of | |
318 | // SetEventHandler, and then processing will be passed down the | |
319 | // chain of event handlers. | |
320 | if (IsKindOf(CLASSINFO(wxWindow))) | |
321 | { | |
322 | wxWindow *win = (wxWindow *)this; | |
323 | ||
324 | // Can only use the validator of the window which | |
325 | // is receiving the event | |
326 | if ( (win == event.GetEventObject()) && | |
327 | win->GetValidator() && | |
328 | win->GetValidator()->ProcessEvent(event)) | |
329 | return TRUE; | |
330 | } | |
331 | ||
332 | // Search upwards through the inheritance hierarchy | |
333 | while (table) | |
334 | { | |
335 | if (SearchEventTable((wxEventTable&)*table, event)) | |
336 | return TRUE; | |
337 | table = table->baseTable; | |
338 | } | |
339 | } | |
340 | ||
341 | // Try going down the event handler chain | |
342 | if ( GetNextHandler() ) | |
343 | { | |
344 | if ( GetNextHandler()->ProcessEvent(event) ) | |
345 | return TRUE; | |
346 | } | |
347 | ||
348 | // Carry on up the parent-child hierarchy, | |
349 | // but only if event is a command event: it wouldn't | |
350 | // make sense for a parent to receive a child's size event, for example | |
351 | if (IsKindOf(CLASSINFO(wxWindow)) && event.IsKindOf(CLASSINFO(wxCommandEvent))) | |
352 | { | |
353 | wxWindow *win = (wxWindow *)this; | |
354 | wxWindow *parent = win->GetParent(); | |
355 | if (parent && !parent->IsBeingDeleted()) | |
356 | return win->GetParent()->GetEventHandler()->ProcessEvent(event); | |
357 | } | |
358 | ||
359 | // Last try - application object. | |
360 | // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always swallow it. | |
361 | // wxEVT_IDLE is sent explicitly to wxApp so it will be processed appropriately | |
362 | // via SearchEventTable. | |
363 | if (wxTheApp && this != wxTheApp && (event.GetEventType() != wxEVT_IDLE) && wxTheApp->ProcessEvent(event)) | |
364 | return TRUE; | |
365 | else | |
366 | return FALSE; | |
367 | } | |
368 | ||
369 | bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event) | |
370 | { | |
371 | int i = 0; | |
372 | int commandId = event.GetId(); | |
373 | ||
374 | while (table.entries[i].m_fn != | |
375 | #ifdef __SGI_CC__ | |
376 | 0L | |
377 | #else | |
378 | NULL | |
379 | #endif | |
380 | ) | |
381 | { | |
382 | // wxEventType eventType = (wxEventType) table.entries[i].m_eventType; | |
383 | ||
384 | if ((event.GetEventType() == table.entries[i].m_eventType) && | |
385 | (table.entries[i].m_id == -1 || // Match, if event spec says any id will do (id == -1) | |
386 | (table.entries[i].m_lastId == -1 && commandId == table.entries[i].m_id) || | |
387 | (table.entries[i].m_lastId != -1 && | |
388 | (commandId >= table.entries[i].m_id && commandId <= table.entries[i].m_lastId)))) | |
389 | { | |
390 | event.Skip(FALSE); | |
391 | event.m_callbackUserData = table.entries[i].m_callbackUserData; | |
392 | ||
393 | (this->*((wxEventFunction) (table.entries[i].m_fn)))(event); | |
394 | ||
395 | if ( event.GetSkipped() ) | |
396 | return FALSE; | |
397 | else | |
398 | return TRUE; | |
399 | } | |
400 | i ++; | |
401 | } | |
402 | return FALSE; | |
403 | } | |
404 | ||
405 | void wxEvtHandler::Connect( int id, int lastId, | |
406 | int eventType, | |
407 | wxObjectEventFunction func, | |
408 | wxObject *userData ) | |
409 | { | |
410 | wxEventTableEntry *entry = new wxEventTableEntry; | |
411 | entry->m_id = id; | |
412 | entry->m_lastId = lastId; | |
413 | entry->m_eventType = eventType; | |
414 | entry->m_fn = func; | |
415 | entry->m_callbackUserData = userData; | |
416 | ||
417 | if (!m_dynamicEvents) | |
418 | m_dynamicEvents = new wxList; | |
419 | ||
420 | m_dynamicEvents->Append( (wxObject*) entry ); | |
421 | } | |
422 | ||
423 | bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event ) | |
424 | { | |
425 | if (!m_dynamicEvents) return FALSE; | |
426 | ||
427 | int commandId = event.GetId(); | |
428 | ||
429 | wxNode *node = m_dynamicEvents->First(); | |
430 | while (node) | |
431 | { | |
432 | wxEventTableEntry *entry = (wxEventTableEntry*)node->Data(); | |
433 | ||
434 | // wxEventType eventType = (wxEventType) entry->m_eventType; | |
435 | ||
436 | if (entry->m_fn) | |
437 | { | |
438 | if ((event.GetEventType() == entry->m_eventType) && | |
439 | (entry->m_id == -1 || // Match, if event spec says any id will do (id == -1) | |
440 | (entry->m_lastId == -1 && commandId == entry->m_id) || | |
441 | (entry->m_lastId != -1 && | |
442 | (commandId >= entry->m_id && commandId <= entry->m_lastId)))) | |
443 | { | |
444 | event.Skip(FALSE); | |
445 | event.m_callbackUserData = entry->m_callbackUserData; | |
446 | ||
447 | (this->*((wxEventFunction) (entry->m_fn)))(event); | |
448 | ||
449 | if (event.GetSkipped()) | |
450 | return FALSE; | |
451 | else | |
452 | return TRUE; | |
453 | } | |
454 | }; | |
455 | node = node->Next(); | |
456 | } | |
457 | return FALSE; | |
458 | }; | |
459 | ||
460 | bool wxEvtHandler::OnClose(void) | |
461 | { | |
462 | if (GetNextHandler()) return GetNextHandler()->OnClose(); | |
463 | else return FALSE; | |
464 | } | |
465 | ||
466 |