【emwin】GRAPH_DATA_YT_Clear调用异常

christsong · 发表于 2014-5-4 09:30:09

我要实现的功能是点正弦按键的时候显示正弦波，按方波按键显示方波。现在的问题是只点击其中一个都正常，先点其中一个再点另一个就会两个波形都出现。我觉得应该是原来的数据项没有删除，所以调用了GRAPH_DATA_YT_Clear，结果直接异常了。。。。求解决，谢谢。前两个button都能正常工作，但是一按第三个立刻就异常了  也就是这句话：GRAPH_DATA_YT_Clear(hData);
相关代码如下：
       case ID_BUTTON_14: // Notifications sent by '正弦波¨'
      switch(NCode) {
      case WM_NOTIFICATION_CLICKED:
        // USER START (Optionally insert code for reacting on notification message)
                                convert_sin();//计算正弦表
                                hData=GRAPH_DATA_YT_Create(GUI_RED,200,wave_data,200);
                                GRAPH_DATA_YT_SetOffY(hData, 60);
                                GRAPH_DATA_YT_SetAlign(hData, GRAPH_ALIGN_LEFT);
                                hItem = WM_GetDialogItem(pMsg->hWin, ID_GRAPH_0);
                                GRAPH_SetGridDistX(hItem, 10);
                                GRAPH_SetGridDistY(hItem, 10);

                                GRAPH_SetGridVis(hItem, 1);

                                GRAPH_AttachData(hItem, hData);
        // USER END
        break;
      case WM_NOTIFICATION_RELEASED:
        // USER START (Optionally insert code for reacting on notification message)
        // USER END
        break;
      // USER START (Optionally insert additional code for further notification handling)
      // USER END
      }
      break;
                        case ID_BUTTON_15: // Notifications sent by '·方波¨'
      switch(NCode) {
      case WM_NOTIFICATION_CLICKED:
        // USER START (Optionally insert code for reacting on notification message)
                                convert_square();
                                hData=GRAPH_DATA_YT_Create(GUI_RED,200,wave_data,200);
                                GRAPH_DATA_YT_SetOffY(hData, 60);
                                GRAPH_DATA_YT_SetAlign(hData, GRAPH_ALIGN_LEFT);
                                hItem = WM_GetDialogItem(pMsg->hWin, ID_GRAPH_0);
                                GRAPH_SetGridDistX(hItem, 10);
                                GRAPH_SetGridDistY(hItem, 10);
                                GRAPH_SetGridVis(hItem, 1);
                                GRAPH_AttachData(hItem, hData);
        // USER END
        break;
      case WM_NOTIFICATION_RELEASED:
        // USER START (Optionally insert code for reacting on notification message)
        // USER END
        break;
      // USER START (Optionally insert additional code for further notification handling)
      // USER END
      }
                        break;
                        case ID_BUTTON_16: // Notifications sent by '清除graph'
      switch(NCode) {
      case WM_NOTIFICATION_CLICKED:
        // USER START (Optionally insert code for reacting on notification message)
//                                hData=GRAPH_DATA_YT_Create(GUI_RED,200,wave_data,200);
//                                hItem = WM_GetDialogItem(pMsg->hWin, ID_GRAPH_0);
                                 GRAPH_DetachData(hItem, hData);
                                GRAPH_DATA_YT_Clear(hData);
//                                GRAPH_DetachData(hItem, hData);
//                                GRAPH_DATA_YT_Delete(hData);
//                                WM_DeleteWindow(hItem);
//                                hItem = WM_GetDialogItem(pMsg->hWin, ID_GRAPH_0);
//                                GRAPH_SetBorder(hItem, 2, 2, 2, 2);
//                                hItem = GRAPH_CreateEx(120, 60, 200, 130, WM_HBKWIN, WM_CF_SHOW, 0, ID_GRAPH_0);
//                                hData = GRAPH_DATA_YT_Create(GUI_RED,200,wave_data,200);
//                                GRAPH_AttachData(hGraph, hData);
        // USER END
        break;
      case WM_NOTIFICATION_RELEASED:
        // USER START (Optionally insert code for reacting on notification message)
        // USER END
        break;
      // USER START (Optionally insert additional code for further notification handling)
      // USER END
      }
    // USER END
    }
    break;