←Select platform

ImageToViewerRectangle Method

Summary

Converts a rectangle in image coordinates to viewer coordinates.

Syntax

C++

public Rectangle ImageToViewerRectangle( 
   Rectangle rect, 
   bool accountForViewPerspective 
)

  
Public Function ImageToViewerRectangle( _ 
   ByVal rect As Rectangle, _ 
   ByVal accountForViewPerspective As Boolean _ 
) As Rectangle

public: 
Rectangle ImageToViewerRectangle(  
   Rectangle rect, 
   bool accountForViewPerspective 
)

Parameters

rect
The rectangle in image coordinates.

accountForViewPerspective
true if rect is already in the image view-perspective. false if rect is in top-left coordinates.

Return Value

A System.Drawing.Rectangle object containing the rectangle coordinates.

Remarks

This method converts a rectangle from image (logical) to viewer (physical) coordinates. The viewer coordinates is what you are currently seeing on the screen. It contains the current scale and scroll values (as well as any padding if set). For example, when you use the RasterViewerInteractiveMode.UserRectangle, the value obtained from the RasterViewerRectangleEventArgs.Rectangle parameter to the InteractiveUserRectangle event is in physical coordinates. If you need to convert this value to image coordinates (for example, to use it as a region or to find the exact pixel coordinate of this rectangle in the image) then you should use the ViewerToImageRectangle method.

When accountForViewPerspective is set to true, it is assumed that rect is already in the correct view perspective of the as the current image (RasterImage.ViewPerspective), therefore, no conversion to top-left (which what the physical coordinates are always in) is performed. If however this value is false, then this method will convert rect to top-left coordinates before converting it to physical coordinates.

To convert a rectangle from viewer (physical) to image (logical) coordinates, use the ViewerToImageRectangle method.

To convert a point from image to viewer coordinates and back, use ImageToViewerPoint and ViewerToImagePoint.

Example

For an example, refer to InteractiveUserRectangle.

Requirements

Target Platforms

Reference

RasterImageViewer Class

RasterImageViewer Members

Help Version 19.0.2017.10.27

Leadtools.WinForms Assembly

Introduction

Getting Started

Namespaces

Leadtools.WinForms Namespace

Assemblies