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LogicalViewRectangle Property

Summary

Gets the logical view rectangle.

Syntax

C++/CLI

C++

public virtual RectangleF LogicalViewRectangle { get; }

[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)] 
[BrowsableAttribute(false)] 
public: 
virtual property RectangleF LogicalViewRectangle { 
   RectangleF get(); 
}

public:  
   virtual property RectangleF^ LogicalViewRectangle 
   { 
      RectangleF^ get() 
   }

Property Value

The logical view rectangle.

Remarks

The logical view rectangle is the current viewing rectangle in image coordinates. The value of this property is the current pixel location (in top-left coordinates) of the left, top, right and bottom portion of the image being viewed on the screen.

In RasterPaintSizeMode.Fit, the value of LogicalViewRectangle is always (0, 0, image width in pixels, image height in pixels) since the entire image is always visible.

Since this property represents the values in image coordinates, if you change the HorizontalAlignMode or VerticalAlignMode mode to RasterPaintAlignMode.Center for example, the top and left values of the LogicalViewRectangle property will still be 0,0 since you are still viewing the entire image.

In other size modes, for example RasterPaintSizeMode.Normal, only portion of the image is viewed due to scrolling and zooming setting, the value of LogicalViewRectangle will be the rectangle formed by the left, top, right and bottom pixel "clip" values into the image.

Example

This example displays the information about the image and the RasterImageViewer settings.

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Drawing; 
 
private void viewer_BorderPadding(object sender, EventArgs e) 
{ 
   RasterImageViewer viewer = sender as RasterImageViewer; 
   MessageBox.Show(viewer.SizeMode.ToString()); 
} 
 
public void RasterImageViewer_BorderPadding(RasterImageViewer viewer) 
{ 
   ViewerBorderPadding b = viewer.BorderPadding; 
   string s = string.Format("Border Padding: All {0}  Left {1}  Top {2}  Right {3}  Bottom {4}", b.All, b.Left, b.Top, b.Right, b.Bottom); 
   Console.WriteLine(s); 
   Console.WriteLine("Image Dpi: (" + viewer.ImageDpiX + ", " + viewer.ImageDpiY + ")"); 
   Console.WriteLine("Image Size: " + viewer.ImageSize.Width + ", " + viewer.ImageSize.Height); 
 
   s = string.Format("LogicalViewRectangle {0}", viewer.LogicalViewRectangle); 
   Console.WriteLine(s); 
   s = string.Format("PhysicalViewRectangle {0}", viewer.PhysicalViewRectangle); 
   Console.WriteLine(s); 
 
}

Requirements

Target Platforms