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InteractiveZoomTo Event

Summary

Occurs when the user performs interactive center of the image display.

Syntax

C++/CLI

C++

public event EventHandler<RasterViewerRectangleEventArgs> InteractiveZoomTo

public: 
event EventHandler<RasterViewerRectangleEventArgs^>^ InteractiveZoomTo

public:  
   event EventHandler<RasterViewerRectangleEventArgs^>^ InteractiveZoomTo

Event Data

The event handler receives an argument of type RasterViewerRectangleEventArgs containing data related to this event. The following RasterViewerRectangleEventArgs properties provide information specific to this event.

Property	Description
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets or sets a value indicating whether the interactive mode should be canceled.
Rectangle	Returns the current interactive mode rectangle.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets the current status of the interactive mode.

Remarks

Only occurs when the InteractiveMode property is set to RasterViewerInteractiveMode.ZoomTo.

Example

This sample zooms the image when dragging a rectangle on the image. Also, it displays the contents of the InteractiveZoomTo event in the console

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Drawing; 
 
private void viewer_InteractiveZoomTo(object sender, RasterViewerRectangleEventArgs e) 
{ 
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Rectangle, e.Status, e.Cancel); 
} 
 
public void RasterImageViewer_InteractiveZoomTo(RasterImageViewer viewer) 
{ 
   viewer.InteractiveMode = RasterViewerInteractiveMode.ZoomTo; 
   viewer.InteractiveZoomTo += new EventHandler<RasterViewerRectangleEventArgs>(viewer_InteractiveZoomTo); 
 
   MessageBox.Show("Draw a rectangle with the mouse to cause a zoom"); 
   // After you are done, you must remove the event handler as in below 
   // 
   // viewer.InteractiveZoomTo -= new EventHandler<RasterViewerRectangleEventArgs>(viewer_InteractiveZoomTo); 
}

Requirements

Target Platforms