MApp_ZUI_CTL_MarqueeTextWinProc字串滚动

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/////////////////////////////////////////////////////////////////////////////// ///  global  MApp_ZUI_CTL_MarqueeTextWinProc ///  Window Proc for "marquee text" control, ///     which display a static text by clipped string with dynamic color ///     if the string content is more than boundary, it will set a timer for text rotation (once) /// ///     rule: if window data == 0, no marquee animation ///           if window is not focus state, no marquee animation ///           if dynamic string content is shorter than boundary, no marquee animation ///           if pData->u8ShowStartPosition==0xFF, animation disabled ///           if pData->u8ShowStartPosition>=strlen, animation disabled /// /// ///  @param [in]       hWnd HWND     window handle ///  @param [in]       pMsg PMSG     message type /// ///  @return S32 message execute result /// ///  @author MStarSemi @date 2007/1/25 ///////////////////////////////////////////////////////////////////////////////   S32 MApp_ZUI_CTL_MarqueeTextWinProc(HWND hWnd, PMSG pMsg) {     GUI_DATA_MARQUEE_VARDATA * pData =         (GUI_DATA_MARQUEE_VARDATA*)MApp_ZUI_API_GetWindowData(hWnd);       switch(pMsg->message)     {         case MSG_TIMER:             if (pData)             {                 if (pData->u8ShowStartPosition == 0)                     MApp_ZUI_API_SetTimer(hWnd, pMsg->wParam, ZUI_MARQUEE_ANIMATION_INTERVAL_MS);                 pData->u8ShowStartPosition++;                 MApp_ZUI_API_InvalidateWindow(hWnd);             }             return 0;           case MSG_PAINT:             {                 //get buffer GC for offline drawing...                 PAINT_PARAM * param = (PAINT_PARAM*)pMsg->wParam;                 DRAWSTYLE_TYPE ds_type = DS_NORMAL;                   if (param->bIsDisable)                 {                     param->dc.u8ConstantAlpha = MApp_ZUI_API_GetDisableAlpha(hWnd);                     ds_type = DS_DISABLE;                 }                 else if (param->bIsFocus) //the same focus group                 {                     param->dc.u8ConstantAlpha = MApp_ZUI_API_GetFocusAlpha(hWnd);                     ds_type = DS_FOCUS;                 }                 else                 {                     param->dc.u8ConstantAlpha = MApp_ZUI_API_GetNormalAlpha(hWnd);                 }                   _MApp_ZUI_API_DefaultOnPaint(hWnd, param, FALSE);                 {                     U16 u16TxtComponentIndex = _MApp_ZUI_API_FindFirstComponentIndex(hWnd, ds_type, CP_TEXT_OUT);                     LPTSTR pStr = MApp_ZUI_ACT_GetDynamicText(hWnd);                     if (u16TxtComponentIndex != 0xFFFF && pStr)                     {                         DRAW_TEXT_OUT_DYNAMIC dyna;                           _MApp_ZUI_API_ConvertTextComponentToDynamic(u16TxtComponentIndex, &dyna);                         dyna.pString = pStr;                         dyna.TextColor = MApp_ZUI_ACT_GetDynamicColor(hWnd, ds_type, dyna.TextColor);                           //marquee animation:                         if (ds_type == DS_FOCUS && pData != NULL &&                             pData->u8ShowStartPosition != 0xFF)                         {                             if (pData->u8ShowStartPosition >= MApp_ZUI_API_Strlen(pStr))                             {                                 pData->u8ShowStartPosition = 0xFF;                                 MApp_ZUI_API_KillTimer(hWnd, 0);                             }                             else if (pData->u8ShowStartPosition == 0)                             {                                 U16 width;                                 clrBtn1.Fontfmt.flag = dyna.flag;                                 clrBtn1.Fontfmt.ifont_gap = dyna.u8dis;                                 clrBtn1.bStringIndexWidth = CHAR_IDX_2BYTE;                                 width = msAPI_OSD_GetStrWidth(Font[dyna.eSystemFont].fHandle, (U8*)pStr, &clrBtn1);                                 //note: add border for a little truncate case..                                 if (width+BTN_TEXT_GAP*2 <= param->rect->width)                                 {                                     pData->u8ShowStartPosition = 0xFF;                                     MApp_ZUI_API_KillTimer(hWnd, 0);                                 }                             }                             else                             {                                 dyna.pString += pData->u8ShowStartPosition;                                 dyna.u8dots = 0; //note: don't show dots for animation..                             }                         }                         else                         {                             //note: pData may be shared with others, so don't clear them                             //      but we need to stop the timer if animation still going                             MApp_ZUI_API_KillTimer(hWnd, 0);                         }                           _MApp_ZUI_API_DrawDynamicComponent(CP_TEXT_OUT_DYNAMIC, &dyna, &param->dc, param->rect);                     }                 }               }             return 0;               default:                 break;     }       return DEFAULTWINPROC(hWnd, pMsg); }   /////////////////////////////////////////////////////////////// // methods   void MApp_ZUI_CTL_MarqueeTextEnableAnimation(HWND hwnd, BOOLEAN bEnable) {     //note: if enable, try to check string length is long enough, and then start animation     //          if disable, stop and clear to normal status       if (hwnd != HWND_INVALID)     {         GUI_DATA_MARQUEE_VARDATA * pData =             (GUI_DATA_MARQUEE_VARDATA*)MApp_ZUI_API_GetWindowData(hwnd);           if (pData == NULL)             return;           if (bEnable)         {             pData->u8ShowStartPosition = 0;             MApp_ZUI_API_SetTimer(hwnd, 0, ZUI_MARQUEE_INITIAL_INTERVAL_MS);         }         else         {             pData->u8ShowStartPosition = 0xFF;             MApp_ZUI_API_KillTimer(hwnd, 0);         }         MApp_ZUI_API_InvalidateWindow(hwnd);     } }