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InteractiveScale Event

Summary

Occurs when the user performs interactive change of the current scale factor using the mouse.

Syntax

C++/CLI

C++

public event EventHandler<RasterViewerLineEventArgs> InteractiveScale

public: 
event EventHandler<RasterViewerLineEventArgs^>^ InteractiveScale

public:  
   event EventHandler<RasterViewerLineEventArgs^>^ InteractiveScale

Event Data

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

Property	Description
Begin	Returns the beginning point for the current interactive mode line.
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets or sets a value indicating whether the interactive mode should be canceled.
End	Returns the end point for the current interactive mode line.
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.Scale.

Example

This sample lets you drag the mouse to scale an image. Also, it displays the contents of the InteractiveScale event in the console

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Drawing; 
 
private void viewer_InteractiveScale(object sender, RasterViewerLineEventArgs e) 
{ 
   RasterImageViewer viewer = sender as RasterImageViewer; 
   if (e.Status == RasterViewerInteractiveStatus.Begin) 
      viewer.Cursor = Cursors.SizeAll; 
   else if (e.Status == RasterViewerInteractiveStatus.End) 
      viewer.Cursor = Cursors.Default; 
   Console.WriteLine("InteractiveScale: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel); 
} 
 
public void RasterImageViewer_InteractiveScale(RasterImageViewer viewer) 
{ 
   viewer.InteractiveMode = RasterViewerInteractiveMode.Scale; 
   viewer.InteractiveScale += new EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveScale); 
 
   // Drag mouse across image to scale the image 
   // After you are done, you must remove the event handler as in below 
   // 
   // viewer.InteractiveScale -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveScale); 
}

Requirements

Target Platforms