bug - 切换功能时图章不会取消

Demo/Examples/PDFViewer/MainPage.xaml.cs

@@ -326,11 +326,13 @@ namespace PDFViewer
             {
                 annotationControl.UnloadEvent();
                 annotationControl.ClearViewerControl();
+                viewControl.PDFViewTool.GetCPDFViewer().SetIsShowStampMouse(false);
             }
             else if (currentMode == "Form")
             {
                 formControl.UnloadEvent();
                 formControl.ClearViewerControl();
+                viewControl.PDFViewTool.GetCPDFViewer().SetIsShowStampMouse(false);
             }
             else if (currentMode == "Content Editor")
             {