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Draw(RasterImage) Method

Summary

Draws the container on the surface of the specified Leadtools.RasterImage object.

Syntax

C++

public virtual void Draw( 
   RasterImage image 
)

  
Public Overloads Overridable Sub Draw( _ 
   ByVal image As Leadtools.RasterImage _ 
)

public: 
virtual void Draw(  
   Leadtools.RasterImage^ image 
)

Parameters

image
The Leadtools.RasterImage object on which to draw this AnnContainer.

Remarks

All visible objects in this container will be drawn into the specified image.

The container objects might be scaled to fit into the image dimension. This method is the equivalent of calling Draw(Graphics, Rectangle) with the rectangle values set to 0, 0, image.ImageWidth, image.ImageHeight/>.

Internally this method will call RasterImage.CreateLeadDC, so the image must satisfy the requirement for that method.

Example

This example will create a container, adds a few annotations objects then burn them on the surface of a Leadtools.RasterImage object.

using Leadtools; 
using Leadtools.Annotations; 
using Leadtools.Codecs; 
using Leadtools.WinForms; 
 
private void ContainerDrawRasterImageExample() 
{ 
   // Load the image 
   RasterCodecs codecs = new RasterCodecs(); 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")); 
 
   // Create and set up the container 
   AnnContainer container = new AnnContainer(); 
   container.Bounds = new AnnRectangle(0, 0, image.ImageWidth, image.ImageHeight); 
   container.UnitConverter = new AnnUnitConverter(image.XResolution, image.YResolution); 
 
   // add a few objects to the container 
   AnnLineObject line = new AnnLineObject(); 
   line.Name = "Line1"; 
   line.Pen = new AnnPen(Color.Red, new AnnLength(1, AnnUnit.Pixel)); 
   line.StartPoint = new AnnPoint(10, 10, AnnUnit.Pixel); 
   line.EndPoint = new AnnPoint(container.Bounds.Right - 10, container.Bounds.Bottom - 10, AnnUnit.Pixel); 
   container.Objects.Add(line); 
 
   AnnRectangleObject rect = new AnnRectangleObject(); 
   rect.Name = "Rectangle1"; 
   rect.Pen = new AnnPen(Color.Blue, new AnnLength(1, AnnUnit.Pixel)); 
   rect.Brush = new AnnSolidBrush(Color.White); 
   rect.Bounds = new AnnRectangle(25, 25, 50, 50, AnnUnit.Pixel); 
   container.Objects.Add(rect); 
 
   // Now paint the annotation onto the image surface 
   container.Draw(image); 
 
   // Save the image to the output file 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Ocr1_CotainerDraw.tif"), RasterImageFormat.Tif, image.BitsPerPixel); 
 
   // Clean up 
   container.Dispose(); 
   image.Dispose(); 
   codecs.Dispose(); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Annotations 
Imports Leadtools.Codecs 
Imports Leadtools.WinForms 
 
Private Sub ContainerDrawRasterImageExample() 
   ' Load the image 
   Dim codecs As New RasterCodecs() 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")) 
 
   ' Create and set up the container 
   Dim container As New AnnContainer() 
   container.Bounds = New AnnRectangle(0, 0, image.ImageWidth, image.ImageHeight) 
   container.UnitConverter = New AnnUnitConverter(image.XResolution, image.YResolution) 
 
   ' add a few objects to the container 
   Dim line As New AnnLineObject() 
   line.Name = "Line1" 
   line.Pen = New AnnPen(Color.Red, New AnnLength(1, AnnUnit.Pixel)) 
   line.StartPoint = New AnnPoint(10, 10, AnnUnit.Pixel) 
   line.EndPoint = New AnnPoint(container.Bounds.Right - 10, container.Bounds.Bottom - 10, AnnUnit.Pixel) 
   container.Objects.Add(line) 
 
   Dim rect As New AnnRectangleObject() 
   rect.Name = "Rectangle1" 
   rect.Pen = New AnnPen(Color.Blue, New AnnLength(1, AnnUnit.Pixel)) 
   rect.Brush = New AnnSolidBrush(Color.White) 
   rect.Bounds = New AnnRectangle(25, 25, 50, 50, AnnUnit.Pixel) 
   container.Objects.Add(rect) 
 
   ' Now paint the annotation onto the image surface 
   container.Draw(image) 
 
   ' Save the image to the output file 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Ocr1_CotainerDraw.tif"), RasterImageFormat.Tif, image.BitsPerPixel) 
 
   ' Clean up 
   container.Dispose() 
   image.Dispose() 
   codecs.Dispose() 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

Requirements

Target Platforms

Reference

AnnContainer Class

AnnContainer Members

Overload List

Help Version 19.0.2017.10.27

Leadtools.Annotations Assembly

Introduction

Getting Started

Namespaces

Leadtools.Annotations Namespace

Assemblies