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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/msw/app.cpp | |
3 | // Purpose: wxApp | |
4 | // Author: Julian Smart | |
5 | // Modified by: | |
6 | // Created: 04/01/98 | |
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 | #if defined(__BORLANDC__) | |
24 | #pragma hdrstop | |
25 | #endif | |
26 | ||
27 | #ifndef WX_PRECOMP | |
28 | #include "wx/msw/wrapcctl.h" | |
29 | #include "wx/dynarray.h" | |
30 | #include "wx/frame.h" | |
31 | #include "wx/app.h" | |
32 | #include "wx/utils.h" | |
33 | #include "wx/gdicmn.h" | |
34 | #include "wx/pen.h" | |
35 | #include "wx/brush.h" | |
36 | #include "wx/cursor.h" | |
37 | #include "wx/icon.h" | |
38 | #include "wx/palette.h" | |
39 | #include "wx/dc.h" | |
40 | #include "wx/dialog.h" | |
41 | #include "wx/msgdlg.h" | |
42 | #include "wx/intl.h" | |
43 | #include "wx/crt.h" | |
44 | #include "wx/log.h" | |
45 | #include "wx/module.h" | |
46 | #endif | |
47 | ||
48 | #include "wx/apptrait.h" | |
49 | #include "wx/filename.h" | |
50 | #include "wx/dynlib.h" | |
51 | #include "wx/evtloop.h" | |
52 | #include "wx/thread.h" | |
53 | ||
54 | #include "wx/msw/private.h" | |
55 | #include "wx/msw/dc.h" | |
56 | #include "wx/msw/ole/oleutils.h" | |
57 | #include "wx/msw/private/timer.h" | |
58 | ||
59 | #if wxUSE_TOOLTIPS | |
60 | #include "wx/tooltip.h" | |
61 | #endif // wxUSE_TOOLTIPS | |
62 | ||
63 | // OLE is used for drag-and-drop, clipboard, OLE Automation..., but some | |
64 | // compilers don't support it (missing headers, libs, ...) | |
65 | #if defined(__GNUWIN32_OLD__) || defined(__SYMANTEC__) | |
66 | #undef wxUSE_OLE | |
67 | ||
68 | #define wxUSE_OLE 0 | |
69 | #endif // broken compilers | |
70 | ||
71 | #if defined(__POCKETPC__) || defined(__SMARTPHONE__) | |
72 | #include <ole2.h> | |
73 | #include <aygshell.h> | |
74 | #endif | |
75 | ||
76 | #if wxUSE_OLE | |
77 | #include <ole2.h> | |
78 | #endif | |
79 | ||
80 | #include <string.h> | |
81 | #include <ctype.h> | |
82 | ||
83 | #include "wx/msw/missing.h" | |
84 | ||
85 | // instead of including <shlwapi.h> which is not part of the core SDK and not | |
86 | // shipped at all with other compilers, we always define the parts of it we | |
87 | // need here ourselves | |
88 | // | |
89 | // NB: DLLVER_PLATFORM_WINDOWS will be defined if shlwapi.h had been somehow | |
90 | // included already | |
91 | #ifndef DLLVER_PLATFORM_WINDOWS | |
92 | // hopefully we don't need to change packing as DWORDs should be already | |
93 | // correctly aligned | |
94 | struct DLLVERSIONINFO | |
95 | { | |
96 | DWORD cbSize; | |
97 | DWORD dwMajorVersion; // Major version | |
98 | DWORD dwMinorVersion; // Minor version | |
99 | DWORD dwBuildNumber; // Build number | |
100 | DWORD dwPlatformID; // DLLVER_PLATFORM_* | |
101 | }; | |
102 | ||
103 | typedef HRESULT (CALLBACK* DLLGETVERSIONPROC)(DLLVERSIONINFO *); | |
104 | #endif // defined(DLLVERSIONINFO) | |
105 | ||
106 | ||
107 | // --------------------------------------------------------------------------- | |
108 | // global variables | |
109 | // --------------------------------------------------------------------------- | |
110 | ||
111 | #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) | |
112 | extern void wxSetKeyboardHook(bool doIt); | |
113 | #endif | |
114 | ||
115 | // NB: all "NoRedraw" classes must have the same names as the "normal" classes | |
116 | // with NR suffix - wxWindow::MSWCreate() supposes this | |
117 | #ifdef __WXWINCE__ | |
118 | WXDLLIMPEXP_CORE wxChar *wxCanvasClassName; | |
119 | WXDLLIMPEXP_CORE wxChar *wxCanvasClassNameNR; | |
120 | #else | |
121 | WXDLLIMPEXP_CORE const wxChar *wxCanvasClassName = wxT("wxWindowClass"); | |
122 | WXDLLIMPEXP_CORE const wxChar *wxCanvasClassNameNR = wxT("wxWindowClassNR"); | |
123 | #endif | |
124 | WXDLLIMPEXP_CORE const wxChar *wxMDIFrameClassName = wxT("wxMDIFrameClass"); | |
125 | WXDLLIMPEXP_CORE const wxChar *wxMDIFrameClassNameNoRedraw = wxT("wxMDIFrameClassNR"); | |
126 | WXDLLIMPEXP_CORE const wxChar *wxMDIChildFrameClassName = wxT("wxMDIChildFrameClass"); | |
127 | WXDLLIMPEXP_CORE const wxChar *wxMDIChildFrameClassNameNoRedraw = wxT("wxMDIChildFrameClassNR"); | |
128 | ||
129 | // ---------------------------------------------------------------------------- | |
130 | // private functions | |
131 | // ---------------------------------------------------------------------------- | |
132 | ||
133 | LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM); | |
134 | ||
135 | // =========================================================================== | |
136 | // wxGUIAppTraits implementation | |
137 | // =========================================================================== | |
138 | ||
139 | // private class which we use to pass parameters from BeforeChildWaitLoop() to | |
140 | // AfterChildWaitLoop() | |
141 | struct ChildWaitLoopData | |
142 | { | |
143 | ChildWaitLoopData(wxWindowDisabler *wd_, wxWindow *winActive_) | |
144 | { | |
145 | wd = wd_; | |
146 | winActive = winActive_; | |
147 | } | |
148 | ||
149 | wxWindowDisabler *wd; | |
150 | wxWindow *winActive; | |
151 | }; | |
152 | ||
153 | void *wxGUIAppTraits::BeforeChildWaitLoop() | |
154 | { | |
155 | /* | |
156 | We use a dirty hack here to disable all application windows (which we | |
157 | must do because otherwise the calls to wxYield() could lead to some very | |
158 | unexpected reentrancies in the users code) but to avoid losing | |
159 | focus/activation entirely when the child process terminates which would | |
160 | happen if we simply disabled everything using wxWindowDisabler. Indeed, | |
161 | remember that Windows will never activate a disabled window and when the | |
162 | last childs window is closed and Windows looks for a window to activate | |
163 | all our windows are still disabled. There is no way to enable them in | |
164 | time because we don't know when the childs windows are going to be | |
165 | closed, so the solution we use here is to keep one special tiny frame | |
166 | enabled all the time. Then when the child terminates it will get | |
167 | activated and when we close it below -- after reenabling all the other | |
168 | windows! -- the previously active window becomes activated again and | |
169 | everything is ok. | |
170 | */ | |
171 | wxBeginBusyCursor(); | |
172 | ||
173 | // first disable all existing windows | |
174 | wxWindowDisabler *wd = new wxWindowDisabler; | |
175 | ||
176 | // then create an "invisible" frame: it has minimal size, is positioned | |
177 | // (hopefully) outside the screen and doesn't appear on the taskbar | |
178 | wxWindow *winActive = new wxFrame | |
179 | ( | |
180 | wxTheApp->GetTopWindow(), | |
181 | wxID_ANY, | |
182 | wxEmptyString, | |
183 | wxPoint(32600, 32600), | |
184 | wxSize(1, 1), | |
185 | wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR | |
186 | ); | |
187 | winActive->Show(); | |
188 | ||
189 | return new ChildWaitLoopData(wd, winActive); | |
190 | } | |
191 | ||
192 | void wxGUIAppTraits::AlwaysYield() | |
193 | { | |
194 | wxYield(); | |
195 | } | |
196 | ||
197 | void wxGUIAppTraits::AfterChildWaitLoop(void *dataOrig) | |
198 | { | |
199 | wxEndBusyCursor(); | |
200 | ||
201 | ChildWaitLoopData * const data = (ChildWaitLoopData *)dataOrig; | |
202 | ||
203 | delete data->wd; | |
204 | ||
205 | // finally delete the dummy frame and, as wd has been already destroyed and | |
206 | // the other windows reenabled, the activation is going to return to the | |
207 | // window which had had it before | |
208 | data->winActive->Destroy(); | |
209 | ||
210 | // also delete the temporary data object itself | |
211 | delete data; | |
212 | } | |
213 | ||
214 | bool wxGUIAppTraits::DoMessageFromThreadWait() | |
215 | { | |
216 | // we should return false only if the app should exit, i.e. only if | |
217 | // Dispatch() determines that the main event loop should terminate | |
218 | wxEventLoopBase * const evtLoop = wxEventLoop::GetActive(); | |
219 | if ( !evtLoop || !evtLoop->Pending() ) | |
220 | { | |
221 | // no events means no quit event | |
222 | return true; | |
223 | } | |
224 | ||
225 | return evtLoop->Dispatch(); | |
226 | } | |
227 | ||
228 | DWORD wxGUIAppTraits::WaitForThread(WXHANDLE hThread) | |
229 | { | |
230 | // if we don't have a running event loop, we shouldn't wait for the | |
231 | // messages as we never remove them from the message queue and so we enter | |
232 | // an infinite loop as MsgWaitForMultipleObjects() keeps returning | |
233 | // WAIT_OBJECT_0 + 1 | |
234 | if ( !wxEventLoop::GetActive() ) | |
235 | return DoSimpleWaitForThread(hThread); | |
236 | ||
237 | return ::MsgWaitForMultipleObjects | |
238 | ( | |
239 | 1, // number of objects to wait for | |
240 | (HANDLE *)&hThread, // the objects | |
241 | false, // wait for any objects, not all | |
242 | INFINITE, // no timeout | |
243 | QS_ALLINPUT | // return as soon as there are any events | |
244 | QS_ALLPOSTMESSAGE | |
245 | ); | |
246 | } | |
247 | ||
248 | wxPortId wxGUIAppTraits::GetToolkitVersion(int *majVer, int *minVer) const | |
249 | { | |
250 | OSVERSIONINFO info; | |
251 | wxZeroMemory(info); | |
252 | ||
253 | // on Windows, the toolkit version is the same of the OS version | |
254 | // as Windows integrates the OS kernel with the GUI toolkit. | |
255 | info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); | |
256 | if ( ::GetVersionEx(&info) ) | |
257 | { | |
258 | if ( majVer ) | |
259 | *majVer = info.dwMajorVersion; | |
260 | if ( minVer ) | |
261 | *minVer = info.dwMinorVersion; | |
262 | } | |
263 | ||
264 | #if defined(__WXHANDHELD__) || defined(__WXWINCE__) | |
265 | return wxPORT_WINCE; | |
266 | #else | |
267 | return wxPORT_MSW; | |
268 | #endif | |
269 | } | |
270 | ||
271 | #if wxUSE_TIMER | |
272 | ||
273 | wxTimerImpl *wxGUIAppTraits::CreateTimerImpl(wxTimer *timer) | |
274 | { | |
275 | return new wxMSWTimerImpl(timer); | |
276 | } | |
277 | ||
278 | #endif // wxUSE_TIMER | |
279 | ||
280 | wxEventLoopBase* wxGUIAppTraits::CreateEventLoop() | |
281 | { | |
282 | return new wxEventLoop; | |
283 | } | |
284 | ||
285 | // =========================================================================== | |
286 | // wxApp implementation | |
287 | // =========================================================================== | |
288 | ||
289 | int wxApp::m_nCmdShow = SW_SHOWNORMAL; | |
290 | ||
291 | // --------------------------------------------------------------------------- | |
292 | // wxWin macros | |
293 | // --------------------------------------------------------------------------- | |
294 | ||
295 | IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler) | |
296 | ||
297 | BEGIN_EVENT_TABLE(wxApp, wxEvtHandler) | |
298 | EVT_IDLE(wxApp::OnIdle) | |
299 | EVT_END_SESSION(wxApp::OnEndSession) | |
300 | EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession) | |
301 | END_EVENT_TABLE() | |
302 | ||
303 | // class to ensure that wxAppBase::CleanUp() is called if our Initialize() | |
304 | // fails | |
305 | class wxCallBaseCleanup | |
306 | { | |
307 | public: | |
308 | wxCallBaseCleanup(wxApp *app) : m_app(app) { } | |
309 | ~wxCallBaseCleanup() { if ( m_app ) m_app->wxAppBase::CleanUp(); } | |
310 | ||
311 | void Dismiss() { m_app = NULL; } | |
312 | ||
313 | private: | |
314 | wxApp *m_app; | |
315 | }; | |
316 | ||
317 | //// Initialize | |
318 | bool wxApp::Initialize(int& argc, wxChar **argv) | |
319 | { | |
320 | if ( !wxAppBase::Initialize(argc, argv) ) | |
321 | return false; | |
322 | ||
323 | // ensure that base cleanup is done if we return too early | |
324 | wxCallBaseCleanup callBaseCleanup(this); | |
325 | ||
326 | #ifdef __WXWINCE__ | |
327 | wxString tmp = GetAppName(); | |
328 | tmp += wxT("ClassName"); | |
329 | wxCanvasClassName = wxStrdup( tmp.wc_str() ); | |
330 | tmp += wxT("NR"); | |
331 | wxCanvasClassNameNR = wxStrdup( tmp.wc_str() ); | |
332 | HWND hWnd = FindWindow( wxCanvasClassNameNR, NULL ); | |
333 | if (hWnd) | |
334 | { | |
335 | SetForegroundWindow( (HWND)(((DWORD)hWnd)|0x01) ); | |
336 | return false; | |
337 | } | |
338 | #endif | |
339 | ||
340 | #if !defined(__WXMICROWIN__) | |
341 | InitCommonControls(); | |
342 | #endif // !defined(__WXMICROWIN__) | |
343 | ||
344 | #if defined(__SMARTPHONE__) || defined(__POCKETPC__) | |
345 | SHInitExtraControls(); | |
346 | #endif | |
347 | ||
348 | #ifndef __WXWINCE__ | |
349 | // Don't show a message box if a function such as SHGetFileInfo | |
350 | // fails to find a device. | |
351 | SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOOPENFILEERRORBOX); | |
352 | #endif | |
353 | ||
354 | wxOleInitialize(); | |
355 | ||
356 | RegisterWindowClasses(); | |
357 | ||
358 | #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) | |
359 | wxSetKeyboardHook(true); | |
360 | #endif | |
361 | ||
362 | callBaseCleanup.Dismiss(); | |
363 | ||
364 | return true; | |
365 | } | |
366 | ||
367 | // --------------------------------------------------------------------------- | |
368 | // RegisterWindowClasses | |
369 | // --------------------------------------------------------------------------- | |
370 | ||
371 | // TODO we should only register classes really used by the app. For this it | |
372 | // would be enough to just delay the class registration until an attempt | |
373 | // to create a window of this class is made. | |
374 | bool wxApp::RegisterWindowClasses() | |
375 | { | |
376 | WNDCLASS wndclass; | |
377 | wxZeroMemory(wndclass); | |
378 | ||
379 | // for each class we register one with CS_(V|H)REDRAW style and one | |
380 | // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag | |
381 | static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS; | |
382 | static const long styleNoRedraw = CS_DBLCLKS; | |
383 | ||
384 | // the fields which are common to all classes | |
385 | wndclass.lpfnWndProc = (WNDPROC)wxWndProc; | |
386 | wndclass.hInstance = wxhInstance; | |
387 | wndclass.hCursor = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW); | |
388 | ||
389 | // register the class for all normal windows | |
390 | wndclass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1); | |
391 | wndclass.lpszClassName = wxCanvasClassName; | |
392 | wndclass.style = styleNormal; | |
393 | ||
394 | if ( !RegisterClass(&wndclass) ) | |
395 | { | |
396 | wxLogLastError(wxT("RegisterClass(frame)")); | |
397 | } | |
398 | ||
399 | // "no redraw" frame | |
400 | wndclass.lpszClassName = wxCanvasClassNameNR; | |
401 | wndclass.style = styleNoRedraw; | |
402 | ||
403 | if ( !RegisterClass(&wndclass) ) | |
404 | { | |
405 | wxLogLastError(wxT("RegisterClass(no redraw frame)")); | |
406 | } | |
407 | ||
408 | // Register the MDI frame window class. | |
409 | wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves | |
410 | wndclass.lpszClassName = wxMDIFrameClassName; | |
411 | wndclass.style = styleNormal; | |
412 | ||
413 | if ( !RegisterClass(&wndclass) ) | |
414 | { | |
415 | wxLogLastError(wxT("RegisterClass(MDI parent)")); | |
416 | } | |
417 | ||
418 | // "no redraw" MDI frame | |
419 | wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw; | |
420 | wndclass.style = styleNoRedraw; | |
421 | ||
422 | if ( !RegisterClass(&wndclass) ) | |
423 | { | |
424 | wxLogLastError(wxT("RegisterClass(no redraw MDI parent frame)")); | |
425 | } | |
426 | ||
427 | // Register the MDI child frame window class. | |
428 | wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); | |
429 | wndclass.lpszClassName = wxMDIChildFrameClassName; | |
430 | wndclass.style = styleNormal; | |
431 | ||
432 | if ( !RegisterClass(&wndclass) ) | |
433 | { | |
434 | wxLogLastError(wxT("RegisterClass(MDI child)")); | |
435 | } | |
436 | ||
437 | // "no redraw" MDI child frame | |
438 | wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw; | |
439 | wndclass.style = styleNoRedraw; | |
440 | ||
441 | if ( !RegisterClass(&wndclass) ) | |
442 | { | |
443 | wxLogLastError(wxT("RegisterClass(no redraw MDI child)")); | |
444 | } | |
445 | ||
446 | return true; | |
447 | } | |
448 | ||
449 | // --------------------------------------------------------------------------- | |
450 | // UnregisterWindowClasses | |
451 | // --------------------------------------------------------------------------- | |
452 | ||
453 | bool wxApp::UnregisterWindowClasses() | |
454 | { | |
455 | bool retval = true; | |
456 | ||
457 | #ifndef __WXMICROWIN__ | |
458 | // MDI frame window class. | |
459 | if ( !::UnregisterClass(wxMDIFrameClassName, wxhInstance) ) | |
460 | { | |
461 | wxLogLastError(wxT("UnregisterClass(MDI parent)")); | |
462 | ||
463 | retval = false; | |
464 | } | |
465 | ||
466 | // "no redraw" MDI frame | |
467 | if ( !::UnregisterClass(wxMDIFrameClassNameNoRedraw, wxhInstance) ) | |
468 | { | |
469 | wxLogLastError(wxT("UnregisterClass(no redraw MDI parent frame)")); | |
470 | ||
471 | retval = false; | |
472 | } | |
473 | ||
474 | // MDI child frame window class. | |
475 | if ( !::UnregisterClass(wxMDIChildFrameClassName, wxhInstance) ) | |
476 | { | |
477 | wxLogLastError(wxT("UnregisterClass(MDI child)")); | |
478 | ||
479 | retval = false; | |
480 | } | |
481 | ||
482 | // "no redraw" MDI child frame | |
483 | if ( !::UnregisterClass(wxMDIChildFrameClassNameNoRedraw, wxhInstance) ) | |
484 | { | |
485 | wxLogLastError(wxT("UnregisterClass(no redraw MDI child)")); | |
486 | ||
487 | retval = false; | |
488 | } | |
489 | ||
490 | // canvas class name | |
491 | if ( !::UnregisterClass(wxCanvasClassName, wxhInstance) ) | |
492 | { | |
493 | wxLogLastError(wxT("UnregisterClass(canvas)")); | |
494 | ||
495 | retval = false; | |
496 | } | |
497 | ||
498 | if ( !::UnregisterClass(wxCanvasClassNameNR, wxhInstance) ) | |
499 | { | |
500 | wxLogLastError(wxT("UnregisterClass(no redraw canvas)")); | |
501 | ||
502 | retval = false; | |
503 | } | |
504 | #endif // __WXMICROWIN__ | |
505 | ||
506 | return retval; | |
507 | } | |
508 | ||
509 | void wxApp::CleanUp() | |
510 | { | |
511 | // all objects pending for deletion must be deleted first, otherwise | |
512 | // UnregisterWindowClasses() call wouldn't succeed (because windows | |
513 | // using the classes being unregistered still exist), so call the base | |
514 | // class method first and only then do our clean up | |
515 | wxAppBase::CleanUp(); | |
516 | ||
517 | #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) | |
518 | wxSetKeyboardHook(false); | |
519 | #endif | |
520 | ||
521 | wxOleUninitialize(); | |
522 | ||
523 | // for an EXE the classes are unregistered when it terminates but DLL may | |
524 | // be loaded several times (load/unload/load) into the same process in | |
525 | // which case the registration will fail after the first time if we don't | |
526 | // unregister the classes now | |
527 | UnregisterWindowClasses(); | |
528 | ||
529 | #ifdef __WXWINCE__ | |
530 | free( wxCanvasClassName ); | |
531 | free( wxCanvasClassNameNR ); | |
532 | #endif | |
533 | } | |
534 | ||
535 | // ---------------------------------------------------------------------------- | |
536 | // wxApp ctor/dtor | |
537 | // ---------------------------------------------------------------------------- | |
538 | ||
539 | wxApp::wxApp() | |
540 | { | |
541 | m_printMode = wxPRINT_WINDOWS; | |
542 | } | |
543 | ||
544 | wxApp::~wxApp() | |
545 | { | |
546 | } | |
547 | ||
548 | // ---------------------------------------------------------------------------- | |
549 | // wxApp idle handling | |
550 | // ---------------------------------------------------------------------------- | |
551 | ||
552 | void wxApp::OnIdle(wxIdleEvent& WXUNUSED(event)) | |
553 | { | |
554 | #if wxUSE_DC_CACHEING | |
555 | // automated DC cache management: clear the cached DCs and bitmap | |
556 | // if it's likely that the app has finished with them, that is, we | |
557 | // get an idle event and we're not dragging anything. | |
558 | if (!::GetKeyState(MK_LBUTTON) && !::GetKeyState(MK_MBUTTON) && !::GetKeyState(MK_RBUTTON)) | |
559 | wxMSWDCImpl::ClearCache(); | |
560 | #endif // wxUSE_DC_CACHEING | |
561 | } | |
562 | ||
563 | void wxApp::WakeUpIdle() | |
564 | { | |
565 | // Send the top window a dummy message so idle handler processing will | |
566 | // start up again. Doing it this way ensures that the idle handler | |
567 | // wakes up in the right thread (see also wxWakeUpMainThread() which does | |
568 | // the same for the main app thread only) | |
569 | wxWindow * const topWindow = wxTheApp->GetTopWindow(); | |
570 | if ( topWindow ) | |
571 | { | |
572 | HWND hwndTop = GetHwndOf(topWindow); | |
573 | ||
574 | // Do not post WM_NULL if there's already a pending WM_NULL to avoid | |
575 | // overflowing the message queue. | |
576 | // | |
577 | // Notice that due to a limitation of PeekMessage() API (which handles | |
578 | // 0,0 range specially), we have to check the range from 0-1 instead. | |
579 | // This still makes it possible to overflow the queue with WM_NULLs by | |
580 | // interspersing the calles to WakeUpIdle() with windows creation but | |
581 | // it should be rather hard to do it accidentally. | |
582 | MSG msg; | |
583 | if ( !::PeekMessage(&msg, hwndTop, 0, 1, PM_NOREMOVE) || | |
584 | ::PeekMessage(&msg, hwndTop, 1, 1, PM_NOREMOVE) ) | |
585 | { | |
586 | if ( !::PostMessage(hwndTop, WM_NULL, 0, 0) ) | |
587 | { | |
588 | // should never happen | |
589 | wxLogLastError(wxT("PostMessage(WM_NULL)")); | |
590 | } | |
591 | } | |
592 | } | |
593 | } | |
594 | ||
595 | // ---------------------------------------------------------------------------- | |
596 | // other wxApp event hanlders | |
597 | // ---------------------------------------------------------------------------- | |
598 | ||
599 | void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event)) | |
600 | { | |
601 | if (GetTopWindow()) | |
602 | GetTopWindow()->Close(true); | |
603 | } | |
604 | ||
605 | // Default behaviour: close the application with prompts. The | |
606 | // user can veto the close, and therefore the end session. | |
607 | void wxApp::OnQueryEndSession(wxCloseEvent& event) | |
608 | { | |
609 | if (GetTopWindow()) | |
610 | { | |
611 | if (!GetTopWindow()->Close(!event.CanVeto())) | |
612 | event.Veto(true); | |
613 | } | |
614 | } | |
615 | ||
616 | // ---------------------------------------------------------------------------- | |
617 | // system DLL versions | |
618 | // ---------------------------------------------------------------------------- | |
619 | ||
620 | // these functions have trivial inline implementations for CE | |
621 | #ifndef __WXWINCE__ | |
622 | ||
623 | #if wxUSE_DYNLIB_CLASS | |
624 | ||
625 | namespace | |
626 | { | |
627 | ||
628 | // helper function: retrieve the DLL version by using DllGetVersion(), returns | |
629 | // 0 if the DLL doesn't export such function | |
630 | int CallDllGetVersion(wxDynamicLibrary& dll) | |
631 | { | |
632 | // now check if the function is available during run-time | |
633 | wxDYNLIB_FUNCTION( DLLGETVERSIONPROC, DllGetVersion, dll ); | |
634 | if ( !pfnDllGetVersion ) | |
635 | return 0; | |
636 | ||
637 | DLLVERSIONINFO dvi; | |
638 | dvi.cbSize = sizeof(dvi); | |
639 | ||
640 | HRESULT hr = (*pfnDllGetVersion)(&dvi); | |
641 | if ( FAILED(hr) ) | |
642 | { | |
643 | wxLogApiError(_T("DllGetVersion"), hr); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | return 100*dvi.dwMajorVersion + dvi.dwMinorVersion; | |
649 | } | |
650 | ||
651 | } // anonymous namespace | |
652 | ||
653 | /* static */ | |
654 | int wxApp::GetComCtl32Version() | |
655 | { | |
656 | // cache the result | |
657 | // | |
658 | // NB: this is MT-ok as in the worst case we'd compute s_verComCtl32 twice, | |
659 | // but as its value should be the same both times it doesn't matter | |
660 | static int s_verComCtl32 = -1; | |
661 | ||
662 | if ( s_verComCtl32 == -1 ) | |
663 | { | |
664 | // we're prepared to handle the errors | |
665 | wxLogNull noLog; | |
666 | ||
667 | // the DLL should really be available | |
668 | wxDynamicLibrary dllComCtl32(_T("comctl32.dll"), wxDL_VERBATIM); | |
669 | if ( !dllComCtl32.IsLoaded() ) | |
670 | { | |
671 | s_verComCtl32 = 0; | |
672 | return 0; | |
673 | } | |
674 | ||
675 | // try DllGetVersion() for recent DLLs | |
676 | s_verComCtl32 = CallDllGetVersion(dllComCtl32); | |
677 | ||
678 | // if DllGetVersion() is unavailable either during compile or | |
679 | // run-time, try to guess the version otherwise | |
680 | if ( !s_verComCtl32 ) | |
681 | { | |
682 | // InitCommonControlsEx is unique to 4.70 and later | |
683 | void *pfn = dllComCtl32.GetSymbol(_T("InitCommonControlsEx")); | |
684 | if ( !pfn ) | |
685 | { | |
686 | // not found, must be 4.00 | |
687 | s_verComCtl32 = 400; | |
688 | } | |
689 | else // 4.70+ | |
690 | { | |
691 | // many symbols appeared in comctl32 4.71, could use any of | |
692 | // them except may be DllInstall() | |
693 | pfn = dllComCtl32.GetSymbol(_T("InitializeFlatSB")); | |
694 | if ( !pfn ) | |
695 | { | |
696 | // not found, must be 4.70 | |
697 | s_verComCtl32 = 470; | |
698 | } | |
699 | else | |
700 | { | |
701 | // found, must be 4.71 or later | |
702 | s_verComCtl32 = 471; | |
703 | } | |
704 | } | |
705 | } | |
706 | } | |
707 | ||
708 | return s_verComCtl32; | |
709 | } | |
710 | ||
711 | /* static */ | |
712 | int wxApp::GetShell32Version() | |
713 | { | |
714 | static int s_verShell32 = -1; | |
715 | if ( s_verShell32 == -1 ) | |
716 | { | |
717 | // we're prepared to handle the errors | |
718 | wxLogNull noLog; | |
719 | ||
720 | wxDynamicLibrary dllShell32(_T("shell32.dll"), wxDL_VERBATIM); | |
721 | if ( dllShell32.IsLoaded() ) | |
722 | { | |
723 | s_verShell32 = CallDllGetVersion(dllShell32); | |
724 | ||
725 | if ( !s_verShell32 ) | |
726 | { | |
727 | // there doesn't seem to be any way to distinguish between 4.00 | |
728 | // and 4.70 (starting from 4.71 we have DllGetVersion()) so | |
729 | // just assume it is 4.0 | |
730 | s_verShell32 = 400; | |
731 | } | |
732 | } | |
733 | else // failed load the DLL? | |
734 | { | |
735 | s_verShell32 = 0; | |
736 | } | |
737 | } | |
738 | ||
739 | return s_verShell32; | |
740 | } | |
741 | ||
742 | #else // !wxUSE_DYNLIB_CLASS | |
743 | ||
744 | /* static */ | |
745 | int wxApp::GetComCtl32Version() | |
746 | { | |
747 | return 0; | |
748 | } | |
749 | ||
750 | /* static */ | |
751 | int wxApp::GetShell32Version() | |
752 | { | |
753 | return 0; | |
754 | } | |
755 | ||
756 | #endif // wxUSE_DYNLIB_CLASS/!wxUSE_DYNLIB_CLASS | |
757 | ||
758 | #endif // !__WXWINCE__ | |
759 | ||
760 | // ---------------------------------------------------------------------------- | |
761 | // Yield to incoming messages | |
762 | // ---------------------------------------------------------------------------- | |
763 | ||
764 | bool wxApp::Yield(bool onlyIfNeeded) | |
765 | { | |
766 | // MT-FIXME | |
767 | static bool s_inYield = false; | |
768 | ||
769 | #if wxUSE_LOG | |
770 | // disable log flushing from here because a call to wxYield() shouldn't | |
771 | // normally result in message boxes popping up &c | |
772 | wxLog::Suspend(); | |
773 | #endif // wxUSE_LOG | |
774 | ||
775 | if ( s_inYield ) | |
776 | { | |
777 | if ( !onlyIfNeeded ) | |
778 | { | |
779 | wxFAIL_MSG( wxT("wxYield called recursively" ) ); | |
780 | } | |
781 | ||
782 | return false; | |
783 | } | |
784 | ||
785 | s_inYield = true; | |
786 | ||
787 | // we don't want to process WM_QUIT from here - it should be processed in | |
788 | // the main event loop in order to stop it | |
789 | MSG msg; | |
790 | while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) && | |
791 | msg.message != WM_QUIT ) | |
792 | { | |
793 | #if wxUSE_THREADS | |
794 | wxMutexGuiLeaveOrEnter(); | |
795 | #endif // wxUSE_THREADS | |
796 | ||
797 | if ( !wxTheApp->Dispatch() ) | |
798 | break; | |
799 | } | |
800 | ||
801 | // if there are pending events, we must process them. | |
802 | ProcessPendingEvents(); | |
803 | ||
804 | #if wxUSE_LOG | |
805 | // let the logs be flashed again | |
806 | wxLog::Resume(); | |
807 | #endif // wxUSE_LOG | |
808 | ||
809 | s_inYield = false; | |
810 | ||
811 | return true; | |
812 | } | |
813 | ||
814 | #if wxUSE_EXCEPTIONS | |
815 | ||
816 | // ---------------------------------------------------------------------------- | |
817 | // exception handling | |
818 | // ---------------------------------------------------------------------------- | |
819 | ||
820 | bool wxApp::OnExceptionInMainLoop() | |
821 | { | |
822 | // ask the user about what to do: use the Win32 API function here as it | |
823 | // could be dangerous to use any wxWidgets code in this state | |
824 | switch ( | |
825 | ::MessageBox | |
826 | ( | |
827 | NULL, | |
828 | _T("An unhandled exception occurred. Press \"Abort\" to \ | |
829 | terminate the program,\r\n\ | |
830 | \"Retry\" to exit the program normally and \"Ignore\" to try to continue."), | |
831 | _T("Unhandled exception"), | |
832 | MB_ABORTRETRYIGNORE | | |
833 | MB_ICONERROR| | |
834 | MB_TASKMODAL | |
835 | ) | |
836 | ) | |
837 | { | |
838 | case IDABORT: | |
839 | throw; | |
840 | ||
841 | default: | |
842 | wxFAIL_MSG( _T("unexpected MessageBox() return code") ); | |
843 | // fall through | |
844 | ||
845 | case IDRETRY: | |
846 | return false; | |
847 | ||
848 | case IDIGNORE: | |
849 | return true; | |
850 | } | |
851 | } | |
852 | ||
853 | #endif // wxUSE_EXCEPTIONS |