Mstar方案软件运行基本原理

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1、 MApp_Main.c里有个while(1)循环； 2、 通过 while(1)循环MApp_MultiTasks 里面的 MApp_ProcessUserInput 可以 得到 当前的 u8KeyCode 3、 while(1)循环 里面的MApp_TopStateMachine的作用： 3.1、在刚开机时，首先 enTopState = STATE_TOP_DIGITALINPUTS 等待用户输入; 3.2、再次调用：MApp_TopStateMachine时，switch ( enTopState ) 之后调用 switch （MApp_TV） ; 3.3、当用户在IR中输入Menu按键; 3.4、通过MApp_TV调用MApp_TV_ProcessUserInput 之后 switch ( u8KeyCode ) case KEY_MENU: enTVState = STATE_TV_INIT; enTVRetVal = EXIT_GOTO_MENU; u8KeyCode = KEY_NULL; break;   switch(MApp_TV()) case EXIT_GOTO_MENU: enTopState = STATE_TOP_MENU; break; 3.5、再次调用：MApp_TopStateMachine时，witch ( enTopState ) 之后调用 switch(MApp_Menu_Main()) ; 3.6、通过MApp_Menu_Main调用MApp_ZUI_ACT_StartupOSD(E_OSD_MAIN_MENU);再调用MApp_ZUI_ACT_AppShowMainMenu();就可以Show出我们想要Show出的主界面了。 enMainMenuState = STATE_MENU_WAIT; _eZUIState = E_ZUI_STATE_RUNNING; 3.7、再次调用MApp_Menu_Main时，switch(enMainMenuState)时，就要执行： MApp_ZUI_ProcessKey(u8KeyCode); u8KeyCode = KEY_NULL; MApp_ZUI_ACT_ExecuteWndAction(EN_EXE_UPDATE_SIGNAL_INFORMAT); 了； 3.8、MApp_ZUI_ProcessKey调用MApp_ZUI_API_PostMessage(HWND_MAINFRAME, MSG_KEYDOWN, vk_code)，Post Message。 3.9、再次调用MApp_TopStateMachine 时执行到 MApp_ZUI_MainTask 时 switch (_eZUIState) eZUIState等于了E_ZUI_STATE_RUNNING,就会调用MApp_ZUI_API_GetMessage(&msg)收到刚才MApp_ZUI_ProcessKey发过来的Message，再通过MApp_ZUI_API_DispatchMessage (&msg);因为我们刚才发的是key的Message所以，执行的以下代码： if (pMsg->message == MSG_KEYDOWN) { //printf(“[dispmsg1]\n”); if (_eZUIState == E_ZUI_STATE_RUNNING /*|| _eZUIState == E_ZUI_STATE_MSGBOX_DOMODAL*/) { if (!MApp_ZUI_ACT_HandleGlobalKey((VIRTUAL_KEY_CODE)pMsg->wParam)) { focus = GETWNDFOCUS(); //printf(“/focus=%bu\n”, (U8)focus); //printf(“[dispmsg2]\n”); if (HWND_INVALID != focus) { pMsg->hwnd = focus; //2007/12/24: keydown message for focus iRet = MApp_ZUI_ACT_ExecuteWndProc(GETWNDPROCID(focus), pMsg); } } } #if ZUI_DBG_RECURSIVE _bInDispatchMessage = 0; #endif //ZUI_DBG_RECURSIVE return iRet; }   3.10、由focus = GETWNDFOCUS();得到当前Win的Focus 3.11、MApp_ZUI_ACT_ExecuteWndProc(GETWNDPROCID(focus), pMsg)两个参数的说明： GETWNDPROCID(focus)，得到当前Win的类型（有EN_ZUI_DEFAULTWINPROC、EN_ZUI_FLIPPAGE_WINPROC、EN_ZUI_EFFECT_WINPROC等类型） pMsg：收到的消息，在本例中收到是按键。 3.12、执行到S32 MApp_ZUI_ACT_ExecuteWndProc(U8 u8WinProcID, PMSG msg)，根据传过来的参数，执行：EFFECT_WINPROC(msg->hwnd, msg);直接调用：return DEFAULTWINPROC(hWnd, pMsg); 3.13、转到执行：MApp_ZUI_API_DefaultWindowProc   本例会执行以下语句： if (GETWNDKEYEVENT(focus)) { KEYEVENT *keyevent;   keyevent = GETWNDKEYEVENT(focus); while (keyevent->u16VirKey != VK_NULL) { if (keyevent->u16VirKey == pMsg->wParam) { handled = MApp_ZUI_ACT_ExecuteWndAction(keyevent->u16ExeActID); //we can allow multiple actions… depend on the last one action.. } keyevent++; } 对这段代码的理解，由GETWNDKEYEVENT(focus)得到当前focus定义的keyevent，如果有定义当前所按键的事件if (keyevent->u16VirKey == pMsg->wParam)则MApp_ZUI_ACT_ExecuteWndAction(keyevent->u16ExeActID);将定义要执行的事件ID传过去。 For example: static KEYEVENT _ZUI_TBLSEG _MENU_PICTURE_MODE_KEY[] = { { VK_SELECT, EN_EXE_GOTO_PICTURE_MODE_PAGE}, { VK_UP, EN_EXE_NOTIFY_PARENT_KEY_UP }, { VK_DOWN, EN_EXE_NOTIFY_PARENT_KEY_DOWN }, { VK_UP, EN_EXE_EFFECT_SLIDEITEM }, { VK_DOWN, EN_EXE_EFFECT_SLIDEITEM }, { VK_LEFT , EN_EXE_EFFECT_FLIPPAGE_LEFT }, { VK_RIGHT , EN_EXE_EFFECT_FLIPPAGE_RIGHT }, { VK_NULL, 0 }, };   3.14、执行到：MApp_ZUI_ACT_ExecuteWndAction 本例只执行：switch(_eActiveOSD)段。当前是E_OSD_MAIN_MENU所以执行MApp_ZUI_ACT_ExecuteMainMenuAction(act); 3.15、以按左右键为例： switch(act) case EN_EXE_EFFECT_FLIPPAGE_LEFT: case EN_EXE_EFFECT_FLIPPAGE_RIGHT: { static HWND hwndTop[] = { HWND_MENU_CHANNEL_PAGE, HWND_MENU_PICTURE_PAGE, HWND_MENU_SOUND_PAGE, HWND_MENU_TIME_PAGE, HWND_MENU_OPTION_PAGE, #if SHOW_LIUBO_ADD_TEST_PAGE HWND_MENU_TEST_PAGE, #endif #if ENABLE_ATV_VCHIP//ENABLE_DTV HWND_MENU_LOCK_PAGE, #endif #if (INPUT_USB_SOURCE == 0) HWND_MENU_APP_PAGE, #endif };   HWND hwndFocus = MApp_ZUI_API_GetFocus(); HWND hwndEffect = hwndFocus; HWND hwndNext = HWND_INVALID; EN_FLIPPAGE dir = EN_FLIPPAGE_NONE; /******若当前不是第0个Index page则 要找到当前功能的首个page 即属性为EN_ZUI_FLIPPAGE_WINPROC的page**************/ while((hwndEffect=MApp_ZUI_API_GetParent(hwndEffect))!= HWND_MAINFRAME ) { if ( MApp_ZUI_API_GetWindowProcId(hwndEffect) == EN_ZUI_FLIPPAGE_WINPROC ) { break; } } /******若当前不是第0个Index page则 要找到当前功能的首个page 即属性为EN_ZUI_FLIPPAGE_WINPROC的page**************/   if ( hwndEffect == HWND_MAINFRAME ) return TRUE;   U32 u32Data = MApp_ZUI_API_GetWindowData(hwndEffect); if ( u32Data == 0 ) return TRUE;   U32 i; for (i=0; i<countof(hwndtop); i++)="" {="" if="" (="" hwndtop[i]="=" hwndeffect="" )="" break;="" }="" i="">= COUNTOF(hwndTop) ) return TRUE; if (act == EN_EXE_EFFECT_FLIPPAGE_LEFT) { if ( i < 1 ) i = COUNTOF(hwndTop) - 1; #if ENABLE_DTV else if((hwndTop[i]==HWND_MENU_APP_PAGE)&&(!IsDTVInUse())) i-=2; #endif else i--; hwndNext = hwndTop[i]; dir = EN_FLIPPAGE_LEFT; } else if (act == EN_EXE_EFFECT_FLIPPAGE_RIGHT) { if ( i+1 >= COUNTOF(hwndTop) ) i = 0; #if ENABLE_DTV else if((hwndTop[i]==HWND_MENU_OPTION_PAGE)&&(!IsDTVInUse())) i+=2; #endif else i++; hwndNext = hwndTop[i]; dir = EN_FLIPPAGE_RIGHT; } HWND child, last_succ; //2008/4/12: get last successor once HWND listwn = hwndNext+2; last_succ = MApp_ZUI_API_GetLastSuccessor(listwn); for (child = listwn+1; child <= last_succ; child++) { if (MApp_ZUI_API_GetParent(child) != listwn) continue; if (MApp_ZUI_ACT_QueryDynamicListItemStatus(child) != EN_DL_STATE_NORMAL) 这个if语句的作用是：设置下个页面不要显示的win。 continue; else break; } GUI_DATA_FLIPPAGE *windata = (GUI_DATA_FLIPPAGE *) u32Data; windata->pVarData->hwndCurrent = hwndEffect; windata->pVarData->hwndNext = hwndNext; /* if(windata->pVarData->hwndNext == HWND_MENU_LOCK_PAGE) { // if focus on HWND_MENU_LOCK_PAGE, set focus on HWND_MENU_LOCK_TITLE // Press Enter to invoke input password dialog and to input password to use HWND_MENU_LOCK_PAGE’s functions. child = windata->pVarData->hwndNext +1; } */ #if ENABLE_DTV if(windata->pVarData->hwndNext == HWND_MENU_LOCK_PAGE) stGenSetting.g_BlockSysSetting.u8EnterLockPage = 0; #endif if(child == last_succ) windata->pVarData->hwndNextFocus = windata->pVarData->hwndNext+3; else windata->pVarData->hwndNextFocus = child; windata->pVarData->dir = dir;   //MApp_ZUI_API_PostMessage(windata->pVarData->hwndCurrent, MSG_EFFECT, 0); MApp_ZUI_API_SendMessage(windata->pVarData->hwndCurrent, MSG_EFFECT, 0); MApp_ZUI_API_InvalidateWindow(HWND_MENU_MAIN_BOTTON_INFO_BAR); return TRUE;