emwin之点击窗口的无效部分来实现一些功能

@2018-07-27

触摸屏幕窗口的无效部分实现 Dropdown 部件的折叠操作

> 具体代码

 case WM_TOUCH:
     if (pMsg->Data.p) // Something happened in our area (pressed or released)
     {
         const GUI_PID_STATE* pState;
         pState = (const GUI_PID_STATE*)pMsg->Data.p;

         if (pState->Pressed)
         {
             if (WM_GetFocussedWindow() != pMsg->hWin)
             {
                 hItem = WM_GetDialogItem(pMsg->hWin, ID_DROPDOWN_0);

                 if( != DROPDOWN_GetListbox(hItem))
                 {
                     DROPDOWN_Collapse(hItem);
                 }

                 hItem = WM_GetDialogItem(pMsg->hWin, ID_DROPDOWN_1);

                 if( != DROPDOWN_GetListbox(hItem))
                 {
                     DROPDOWN_Collapse(hItem);
                 }

                 hItem = WM_GetDialogItem(pMsg->hWin, ID_DROPDOWN_2);

                 if( != DROPDOWN_GetListbox(hItem))
                 {
                     DROPDOWN_Collapse(hItem);
                 }
             }
         }
     }
     break;