emwin之CHECKBOX控件的通知代码的响应规则

@2018-08-28

【小记】

在 case WM_INIT_DIALOG: 中使用 CHECKBOX_SetState()函数改变了复选框状态，就会产生 WM_NOTIFICATION_VALUE_CHANGED 通知代码，则在 case WM_NOTIFY_PARENT: 中就会进入该分支

【调试记录】

下段代码的执行顺序 ①——⑤——②——⑥——③——⑦——④，这都是因使用了函数 CHECKBOX_SetState（） 引起的

 case WM_INIT_DIALOG:
     //
     // Initialization of 'opt1-Checkbox'
     //
     hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_0);
     CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt1]);
     CHECKBOX_SetFont(hItem, GUI_FONT_16B_1);
     CHECKBOX_SetTextColor(hItem, GUI_MAKE_COLOR(0x00FF0000));
     CHECKBOX_SetState(hItem, ttEnableOpt1);    // --①
     //
     // Initialization of 'opt2-Checkbox'
     //
     hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_1);
     CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt2]);
     CHECKBOX_SetFont(hItem, GUI_FONT_16B_1);
     CHECKBOX_SetTextColor(hItem, GUI_MAKE_COLOR(0x00FF0000));
     CHECKBOX_SetState(hItem, ttEnableOpt2);    // --②
     //
     // Initialization of 'opt3-Checkbox'
     //
     hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_2);
     CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt3]);
     CHECKBOX_SetFont(hItem, GUI_FONT_16B_1);
     CHECKBOX_SetTextColor(hItem, GUI_MAKE_COLOR(0x00FF0000));
     CHECKBOX_SetState(hItem, ttEnableOpt3);    // --③
     // USER START (Optionally insert additional code for further widget initialization)
     // --④
     WM_MakeModal(pMsg->hWin);
     initFlag = ;

     // USER END
     break;

  case WM_NOTIFY_PARENT:
     Id    = WM_GetId(pMsg->hWinSrc);
     NCode = pMsg->Data.v;
     switch(Id) {
         case ID_CHECKBOX_0: // Notifications sent by 'opt1-Checkbox'
             switch(NCode) {
                 case WM_NOTIFICATION_CLICKED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_RELEASED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_VALUE_CHANGED:
                     // USER START (Optionally insert code for reacting on notification message)
                 　　 // --⑤
                     if( == initFlag)
                     {
                         ttEnableOpt1 = !ttEnableOpt1;
                         hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_0);
                         CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt1]);
                     }

                     // USER END
                     break;
                 // USER START (Optionally insert additional code for further notification handling)
                 // USER END
             }
             break;
         case ID_CHECKBOX_1: // Notifications sent by 'opt2-Checkbox'
             switch(NCode) {
                 case WM_NOTIFICATION_CLICKED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_RELEASED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_VALUE_CHANGED:
                     // USER START (Optionally insert code for reacting on notification message)
                 　　 // --⑥
                     if( == initFlag)
                     {
                         ttEnableOpt2 = !ttEnableOpt2;
                         hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_1);
                         CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt2]);
                     }

                     // USER END
                     break;
                 // USER START (Optionally insert additional code for further notification handling)
                 // USER END
             }
             break;
         case ID_CHECKBOX_2: // Notifications sent by 'opt3-Checkbox'
             switch(NCode) {
                 case WM_NOTIFICATION_CLICKED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_RELEASED:
                     // USER START (Optionally insert code for reacting on notification message)
                     // USER END
                     break;
                 case WM_NOTIFICATION_VALUE_CHANGED:
                     // USER START (Optionally insert code for reacting on notification message)
                 　　 // --⑦
                     if( == initFlag)
                     {
                         ttEnableOpt3 = !ttEnableOpt3;
                         hItem = WM_GetDialogItem(pMsg->hWin, ID_CHECKBOX_2);
                         CHECKBOX_SetText(hItem, ttEnable[ttEnableOpt3]);
                     }

                     // USER END
                     break;
                 // USER START (Optionally insert additional code for further notification handling)
                 // USER END
             }
             break;
         // USER START (Optionally insert additional code for further Ids)
         // USER END
     }
     break;