Question

Qt怎样处理Windows消息

Answer 1

1. bool MainWindow::winEvent(MSG* pMsg)
2. {
3. if ( pMsg->message == WM_COPYDATA )
4. {
5. COPYDATASTRUCT* pCopyDataStruct;
6. POSTERS_REC_STRUCT* pRec;
7. unsigned char* odapMsgPtr[MAX_POSTERS_SIZE];
8. QString str;
9. pCopyDataStruct = (COPYDATASTRUCT*) pMsg->lParam;
10. switch (pCopyDataStruct->dwData)
11. {
12. case VALID_REC1 :
13. case VALID_REC2 :
14. {
15. (void)memcpy(odapMsgPtr, pCopyDataStruct->lpData, pCopyDataStruct->cbData);
16. if (odapMsgPtr != NULL)
17. {
18. pRec = (POSTERS_REC_STRUCT *)odapMsgPtr;
19. class_data1 = pRec->var1;
20. class_data2 = pRec->var2;
21. }
22. }
23. }
24. return true;
25. }
26. else
27. return false;
28. }
29. Some Code on the web gives another example
30. #ifdef HAVE_WIN32_API
31. virtual bool winEventFilter(MSG * msg) {
32. SPW_InputEvent sbEvent;
33. if (SPW_TranslateEventWin32(msg, &sbEvent)) {
34. QWidget * focus = this->focusWidget();
35. if (!focus) focus = this->activeWindow();
36. if (focus) {
37. QCustomEvent qevent((QEvent::Type)SoQtInternal::SPACEBALL_EVENT,
38. (void *)&sbEvent);
39. QApplication::sendEvent(focus, &qevent);
40. }
41. }
42. #if (QT_VERSION >= 0x040000)
43. long result = 0;
44. return QApplication::winEventFilter(msg, &result);
45. #else
46. return QApplication::winEventFilter(msg);
47. #endif

The QSystemTrayIcon class provides an icon for an application in the system tray.
Modern operating systems usually provide a special area on the desktop, called the system tray or notification area, where long-running applications can display icons and short messages.

1. /* translates a Win32 event to a SPW_InputEvent. */
2. int SPW_TranslateEventWin32(MSG * msg, SPW_InputEvent * sbEvent)
3. {
4. SiSpwEvent spwEvent;
5. SiGetEventData eventdata;
6. if (Spw_DeviceHandle != SI_NO_HANDLE) {
7. SiGetEventWinInit (&eventdata, msg->message, msg->wParam, msg->lParam);
8. if (SiGetEvent (Spw_DeviceHandle, 0, &eventdata, &spwEvent) == SI_IS_EVENT) {
9. int i;
10. switch(spwEvent.type) {
11. case SI_MOTION_EVENT:
12. sbEvent->type = SPW_InputMotionEvent;
13. for(i=0; i<6; i++) {
14. sbEvent->sData[i] = (short)spwEvent.u.spwData.mData[i];
15. }
16. break;
17. case SI_BUTTON_EVENT:
18. sbEvent->type = SPW_InputButtonPressEvent;
19. sbEvent->buttonState.pressed = (SiButtonPressed(&spwEvent) != SI_NO_BUTTON);
20. sbEvent->buttonState.released = (SiButtonReleased(&spwEvent) != SI_NO_BUTTON);
21. break;
22. }
23. return TRUE;
24. }
25. }
26. return FALSE;
27. }