RotateViewPerspective Method

Summary

Rotates this RasterImage by changing its ViewPerspective.

Syntax

Objective-C

C++/CLI

Java

Python

public void RotateViewPerspective( 
   int degrees 
)

- (BOOL)rotateViewPerspective:(NSInteger)degrees error:(NSError **)error

public void rotateViewPerspective( 
   int intValue 
);

public: 
void RotateViewPerspective(  
   int degrees 
)

def RotateViewPerspective(self,degrees):

Parameters

degrees
Degrees of rotation. Valid values +-90, +-180, +-270, or +-360. Positive values are clockwise; negative values are counterclockwise.

Remarks

((Document/Medical only) only).

This method achieves fast rotation by changing only the ViewPerspective.

After using this method, you can reverse the result by restoring the original ViewPerspective.

Some methods must account for the view perspective. For more information refer to Accounting for View Perspective.

For more information, refer to Introduction to Image Processing With LEADTOOLS.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void ChangedExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
	// Load the image 
	RasterImage img = codecs.Load(srcFileName); 
 
	// Subscribe to the Changed event of this image 
	img.Changed += new EventHandler<RasterImageChangedEventArgs>(img_Changed); 
 
	// Call a few methods and image processing commands that changes the image 
	Console.WriteLine("Calling FlipViewPerspective"); 
	img.FlipViewPerspective(true); 
 
	Console.WriteLine("Calling RotateViewPerspective"); 
	img.RotateViewPerspective(90); 
 
	Console.WriteLine("Calling FlipCommand"); 
	FlipCommand flip = new FlipCommand(true); 
	flip.Run(img); 
 
	// Now disable firing the events and call the methods again 
	Console.WriteLine("Disabling the events"); 
	img.DisableEvents(); 
 
	Console.WriteLine("Calling FlipViewPerspective"); 
	img.FlipViewPerspective(true); 
 
	Console.WriteLine("Calling RotateViewPerspective"); 
	img.RotateViewPerspective(90); 
 
	Console.WriteLine("Calling FlipCommand while"); 
	flip.Run(img); 
 
	// Re-enable the events and fire it manually 
	Console.WriteLine("Re-enabling the events"); 
	img.EnableEvents(); 
 
	Console.WriteLine("Firing the event manually"); 
	RasterImageChangedFlags flags = RasterImageChangedFlags.Data | RasterImageChangedFlags.ViewPerspective; 
	RasterImageChangedEventArgs e = new RasterImageChangedEventArgs(flags); 
 
	img.OnChanged(e); 
 
	// Clean up 
	img.Changed -= new EventHandler<RasterImageChangedEventArgs>(img_Changed); 
	img.Dispose(); 
	codecs.Dispose(); 
} 
 
void img_Changed(object sender, RasterImageChangedEventArgs e) 
{ 
	// Show the changed flags 
	Console.WriteLine("Changed: {0}", e.Flags); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies