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IsInteractiveModeBusy Property
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Leadtools.WinForms Namespace > RasterImageViewer Class : IsInteractiveModeBusy Property




Determines if the user is currently involved in an interactive operation.

Syntax

Visual Basic (Declaration) 
<BrowsableAttribute(False)>
Public Overridable ReadOnly Property IsInteractiveModeBusy As Boolean
Visual Basic (Usage)Copy Code
Dim instance As RasterImageViewer
Dim value As Boolean
 
value = instance.IsInteractiveModeBusy
C# 
[BrowsableAttribute(false)]
public virtual bool IsInteractiveModeBusy {get;}
Managed Extensions for C++ 
[BrowsableAttribute(false)]
public: __property virtual bool get_IsInteractiveModeBusy();
C++/CLI 
[BrowsableAttribute(false)]
public:
virtual property bool IsInteractiveModeBusy {
   bool get();
}

Return Value

true if the user is currently involved in an interactive operation, false otherwise.

Example

This sets the interactive mode to draw a rectangular region. If the mouse is dragged up or to the left, the interactive mode is cancelled.

Visual BasicCopy Code
Private Sub MyRasterViewerRectangleEventHandler(ByVal sender As Object, ByVal e As RasterViewerRectangleEventArgs)
   Dim viewer As RasterImageViewer = CType(IIf(TypeOf sender Is RasterImageViewer, sender, Nothing), RasterImageViewer)
   Dim ee As RasterViewerRectangleEventArgs = New RasterViewerRectangleEventArgs(e.Status, e.Rectangle)
   If ((e.Rectangle.Left > e.Rectangle.Right) OrElse (e.Rectangle.Top > e.Rectangle.Bottom)) AndAlso e.Status = RasterViewerInteractiveStatus.End Then
      e.Cancel = True
      viewer.Invalidate()
      If (Not viewer.IsInteractiveModeBusy) Then
         MessageBox.Show("Interactive mode (Rectangular region) cancelled")
         viewer.InteractiveMode = RasterViewerInteractiveMode.None
      End If
   End If
   Console.WriteLine("" & e.Rectangle.Left & ", " & e.Rectangle.Top & ", " & e.Rectangle.Right & ", " & e.Rectangle.Bottom)
End Sub

Public Sub RasterImageViewer_IsInteractiveModeBusy(ByVal viewer As RasterImageViewer)
   AddHandler viewer.InteractiveRegionRectangle, AddressOf MyRasterViewerRectangleEventHandler
   viewer.InteractiveMode = RasterViewerInteractiveMode.Region
   viewer.InteractiveRegionType = RasterViewerInteractiveRegionType.Rectangle

   MessageBox.Show("Interactive mode set to draw a rectangular region." & Constants.vbLf & "If mouse is dragged up or to the left, interactive mode is cancelled")
End Sub
C#Copy Code
private void MyRasterViewerRectangleEventHandler(object sender, RasterViewerRectangleEventArgs e) 
{ 
   RasterImageViewer viewer = sender as RasterImageViewer; 
  RasterViewerRectangleEventArgs ee = new RasterViewerRectangleEventArgs(e.Status, e.Rectangle); 
  if (((e.Rectangle.Left > e.Rectangle.Right) || (e.Rectangle.Top > e.Rectangle.Bottom)) && e.Status == RasterViewerInteractiveStatus.End) 
  { 
     e.Cancel = true; 
     viewer.Invalidate(); 
     if(!viewer.IsInteractiveModeBusy) 
     { 
        MessageBox.Show("Interactive mode (Rectangular region) cancelled"); 
        viewer.InteractiveMode = RasterViewerInteractiveMode.None; 
     } 
  } 
  Console.WriteLine(@"" + e.Rectangle.Left + ", " + e.Rectangle.Top + ", " + e.Rectangle.Right + ", " + e.Rectangle.Bottom); 
} 
 
public void RasterImageViewer_IsInteractiveModeBusy(RasterImageViewer viewer) 
{ 
   viewer.InteractiveRegionRectangle += new EventHandler<RasterViewerRectangleEventArgs>(MyRasterViewerRectangleEventHandler); 
   viewer.InteractiveMode = RasterViewerInteractiveMode.Region; 
   viewer.InteractiveRegionType = RasterViewerInteractiveRegionType.Rectangle; 
 
   MessageBox.Show("Interactive mode set to draw a rectangular region.\nIf mouse is dragged up or to the left, interactive mode is cancelled"); 
}

Remarks

The type of interactive user operation is determined by the InteractiveMode property.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also