Mstar 6M48部分软件流程之一

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

    {

            if ( hwndTop[i] == hwndEffect )

           break;

      }

                if ( 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;