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RasterImageViewer Class

Summary

Represents a Leadtools ImageViewer control for displaying an image.

Syntax

C++/CLI

[DefaultEventAttribute("TransformChanged")] 
[DefaultPropertyAttribute("ScaleFactor")] 
public class RasterImageViewer : Control

public: 
   [DefaultEventAttribute(L"TransformChanged"),  
   DefaultPropertyAttribute(L"ScaleFactor")] 
   ref class RasterImageViewer : Control

Remarks

The RasterImageViewer is used to display graphics from a bitmap, metafile, icon, JPEG, GIF or PNG (or any other image file format supported by Leadtools) file. Set the Image property to an Leadtools.RasterImage object to be displayed. The RasterImageViewer control can automatically handle zooming and scrolling. For information on using Annotations with the RasterImageViewer, refer to Implementing Annotations

Example

This example will create an instance of the RasterImageViewer control and adds it to a form

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Drawing; 
 
public void RasterImageViewer_RasterImageViewer() 
{ 
   MyForm1 form = new MyForm1(); 
   form.ShowDialog(); 
} 
 
class MyForm1 : Form 
{ 
   RasterImageViewer theViewer; 
 
   public MyForm1() 
   { 
      // Create the raster viewer 
      theViewer = new RasterImageViewer(); 
      theViewer.Dock = DockStyle.Fill; 
      theViewer.DoubleBuffer = true; 
      theViewer.BorderStyle = BorderStyle.Fixed3D; 
      theViewer.AutoResetScaleFactor = true; 
      theViewer.AutoResetScrollPosition = true; 
      theViewer.HorizontalAlignMode = RasterPaintAlignMode.Center; 
      theViewer.VerticalAlignMode = RasterPaintAlignMode.Far; 
      theViewer.FrameSize = new SizeF(10, 5); 
      theViewer.FrameColor = Color.Red; 
      theViewer.FramesIsPartOfImage = true; 
      theViewer.FrameShadowSize = new SizeF(5, 5); 
      theViewer.FrameShadowColor = Color.Blue; 
      theViewer.AutoScroll = true; 
      theViewer.UseDpi = true; 
 
      // Set the paint properties 
      RasterPaintProperties p = new RasterPaintProperties(); 
      p.PaintDisplayMode = RasterPaintDisplayModeFlags.Bicubic; 
      p.PaintEngine = RasterPaintEngine.GdiPlus; 
      p.UsePaintPalette = true; 
      theViewer.PaintProperties = p; 
 
      theViewer.AnimateRegion = true; 
      theViewer.EnableTimer = true; 
      theViewer.EnableScrollingInterface = true; 
 
      Controls.Add(theViewer); 
      theViewer.BringToFront(); 
 
      // load an image into the viewer 
      RasterCodecs codecs = new RasterCodecs(); 
      theViewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Sample1.cmp")); 
      codecs.Dispose(); 
 
      Text = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
 
      theViewer.DoubleClick += new EventHandler(theViewer_DoubleClick); 
   } 
 
   void theViewer_DoubleClick(object sender, EventArgs e) 
   { 
      switch (theViewer.SizeMode) 
      { 
         case RasterPaintSizeMode.Normal: 
            theViewer.SizeMode = RasterPaintSizeMode.Stretch; 
            break; 
 
         case RasterPaintSizeMode.Stretch: 
            theViewer.SizeMode = RasterPaintSizeMode.Fit; 
            break; 
 
         case RasterPaintSizeMode.Fit: 
            theViewer.SizeMode = RasterPaintSizeMode.FitAlways; 
            break; 
 
         case RasterPaintSizeMode.FitAlways: 
            theViewer.SizeMode = RasterPaintSizeMode.FitWidth; 
            break; 
 
         case RasterPaintSizeMode.FitWidth: 
            theViewer.SizeMode = RasterPaintSizeMode.Normal; 
            break; 
      } 
 
      Text = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
 
      base.OnDoubleClick(e); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms