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RasterImageListItem Class

Summary

Represents an item in a ImageList control containing a LEADTOOLS Leadtools.RasterImage.

Syntax

C++

public class RasterImageListItem : ImageListItem

  
Public Class RasterImageListItem  
   Inherits Leadtools.Windows.Controls.ImageListItem 
   Implements Leadtools.Windows.Controls.IImageListItem, System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

public ref class RasterImageListItem : public Leadtools.Windows.Controls.ImageListItem, Leadtools.Windows.Controls.IImageListItem, System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

Remarks

The RasterImageListItem class derives from ImageListItem and adds functionality to display a LEADTOOLS Leadtools.RasterImage object in the WPF/Silverlight ImageList control. To display a System.Windows.Media.ImageSource or one of its derived classes, use the ImageListItem class.

In addition to all the features supported by the ImageListItem class, RasterImageListItem adds the following:

Adding items with a LEADTOOLS Leadtools.RasterImage object using the Image property.
In WPF/Silverlight, an image that is displayed must be an System.Windows.Media.ImageSource or one of its derived classes, the RasterImageListItem class keeps the ImageListItem.Source property synchronized with RasterImageListItem.Image, any changes that occur to the LEADTOOLS Leadtools.RasterImage is reflected in the Source property and a standard System.Windows.FrameworkPropertyMetadata.AffectsMeasure or System.Windows.FrameworkPropertyMetadata.AffectsRender is performed. Also, this control will subscribe to the RasterImage.Changed to monitor any changes that may occur to the image (through image processing for example) and reflect these changes to the Source property.
If the Source property is changed, the RasterImageListItem must be informed so it can reflect the changes into the Image object. The UpdateImageFromSource can be used to perform this task.

Example

Silverlight C#

Silverlight VB

using Leadtools.Help; 
using Leadtools.Windows.Controls; 
using Leadtools.Codecs; 
 
class MyWindow2 : Window 
{ 
   public ImageList imageList; 
   public MyWindow2(string title) 
   { 
      Title = title; 
 
      // Set the size of the window 
      Width = 400; 
      Height = 200; 
 
      // Create a new ImageList control. 
      imageList = new ImageList(); 
      imageList.Width = Double.NaN; 
      imageList.Height = Double.NaN; 
 
      imageList.Items.SortDescriptions.Clear(); 
      imageList.Background = new RadialGradientBrush(Colors.DarkGray, Colors.LightGray); 
      imageList.Items.SortDescriptions.Add(new SortDescription("Text", ListSortDirection.Ascending)); 
 
      imageList.BorderThickness = new Thickness(5, 5, 5, 5); 
 
 
      // Create three items 
      string imagesPath = LEAD_VARS.ImagesDir; 
      try 
      { 
 
         using (RasterCodecs codecs = new RasterCodecs()) 
         { 
            for (int i = 0; i < 3; i++) 
            { 
               int index = i + 1; 
               string imageFileName = Path.Combine(imagesPath, @"ImageProcessingDemo\Image" + index.ToString() + ".jpg"); 
 
               RasterImageListItem item = new RasterImageListItem(); 
               item.Uri = new Uri(imageFileName); 
               item.Text = imageFileName; 
               item.ShowText = true; 
 
               item.Image = codecs.Load(imageFileName); 
               item.ImageSize = new Size(120, 120); 
               item.Width = 150; 
               item.Height = 150; 
               item.SelectedBackground = Brushes.White; 
               item.SelectedForeground = Brushes.Blue; 
 
               // Select the first item 
               if (i == 0) 
                  item.IsSelected = true; 
 
               // Add the item to the image list 
               imageList.Items.Add(item); 
            } 
         } 
      } 
      catch (Exception ex) 
      { 
         MessageBox.Show(ex.Message); 
      } 
      finally 
      { 
      } 
 
      // Add the ImageList to the Window. 
      Content = imageList; 
   } 
} 
 
public void ImageListItem_RasterImageListItem(string title) 
{ 
   MyWindow1 window = new MyWindow1(title); 
   window.ShowDialog(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools.Windows.Controls 
Imports Leadtools.Codecs 
 
Private Class MyWindow2 : Inherits Window 
   Public imageList As ListBox 
   Public Sub New(ByVal title As String) 
      title = title 
 
      ' Set the size of the window 
      Width = 400 
      Height = 200 
 
      ' Create a new ImageList control. 
      imageList = New ListBox() 
      imageList.Width = Double.NaN 
      imageList.Height = Double.NaN 
 
      imageList.Items.SortDescriptions.Clear() 
      imageList.Background = New RadialGradientBrush(Colors.DarkGray, Colors.LightGray) 
      imageList.Items.SortDescriptions.Add(New SortDescription("Text", ListSortDirection.Ascending)) 
 
      imageList.BorderThickness = New Thickness(5, 5, 5, 5) 
 
 
      ' Create three items 
      Dim imagesPath As String = LEAD_VARS.ImagesDir 
      Try 
 
         Using codecs As RasterCodecs = New RasterCodecs() 
            For i As Integer = 0 To 2 
               Dim index As Integer = i + 1 
               Dim imageFileName As String = Path.Combine(imagesPath, "ImageProcessingDemo\Image" & index.ToString() & ".jpg") 
 
               Dim item As RasterImageListItem = New RasterImageListItem() 
               item.Uri = New Uri(imageFileName) 
               item.Text = imageFileName 
               item.ShowText = True 
 
               item.Image = codecs.Load(imageFileName) 
               item.ImageSize = New Size(120, 120) 
               item.Width = 150 
               item.Height = 150 
               item.SelectedBackground = Brushes.White 
               item.SelectedForeground = Brushes.Blue 
 
               ' Select the first item 
               If i = 0 Then 
                  item.IsSelected = True 
               End If 
 
               ' Add the item to the image list 
               imageList.Items.Add(item) 
            Next i 
         End Using 
      Catch ex As Exception 
         MessageBox.Show(ex.Message) 
      Finally 
      End Try 
 
      ' Add the ImageList to the Window. 
      Content = imageList 
   End Sub 
End Class 
 
Public Sub ImageListItem_RasterImageListItem(ByVal title As String) 
   Dim window As MyWindow1 = New MyWindow1(title) 
   window.ShowDialog() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

using Leadtools.Help; 
using Leadtools.Windows.Controls; 
using Leadtools.Codecs; 
 
class MyWindow2 : ChildWindow 
{ 
   public ListBox imageList; 
   public MyWindow2(string title) 
   { 
      Title = title; 
 
      // Set the size of the window 
      Width = 400; 
      Height = 200; 
 
      // Create a new ImageList control. 
      imageList = new ListBox(); 
      imageList.Width = Double.NaN; 
      imageList.Height = Double.NaN; 
 
      imageList.Background = new RadialGradientBrush(Colors.DarkGray, Colors.LightGray); 
      imageList.BorderThickness = new Thickness(5, 5, 5, 5); 
 
 
      // Create three items 
      string imagesPath = LeadtoolsExamples.Common.ImagesPath.Path; 
      try 
      { 
         RasterCodecs codecs = new RasterCodecs(); 
         for (int i = 0; i < 3; i++) 
         { 
            int index = i + 1; 
            string imageFileName = imagesPath + "Image" + index.ToString() + ".jpg"; 
 
            RasterImageListItem item = new RasterImageListItem(); 
            item.Uri = new Uri(imageFileName); 
            item.Text = imageFileName; 
            item.ShowText = true; 
 
            item.Image = codecs.Load(imageFileName); 
            item.ImageSize = new Size(120, 120); 
            item.Width = 150; 
            item.Height = 150; 
            item.SelectedBackground = new SolidColorBrush(Colors.White); 
            item.SelectedForeground = new SolidColorBrush(Colors.Blue); 
 
            // Select the first item 
            if (i == 0) 
               item.IsSelected = true; 
 
            // Add the item to the image list 
            imageList.Items.Add(item); 
         } 
      } 
      catch (Exception ex) 
      { 
         MessageBox.Show(ex.Message); 
      } 
      finally 
      { 
      } 
 
      // Add the ImageList to the Window. 
      Content = imageList; 
   } 
} 
 
public void ImageListItem_RasterImageListItem(string title) 
{ 
   MyWindow1 window = new MyWindow1(title); 
   window.Show(); 
}

Imports Leadtools.Windows.Controls 
Imports Leadtools.Codecs 
 
Private Class MyWindow2 : Inherits ChildWindow 
   Public imageList As ListBox 
   Public Sub New(ByVal title As String) 
      title = title 
 
      ' Set the size of the window 
      Width = 400 
      Height = 200 
 
      ' Create a new ImageList control. 
      imageList = New ListBox() 
      imageList.Width = Double.NaN 
      imageList.Height = Double.NaN 
 
      imageList.Background = New RadialGradientBrush(Colors.DarkGray, Colors.LightGray) 
      imageList.BorderThickness = New Thickness(5, 5, 5, 5) 
 
 
      ' Create three items 
      Dim imagesPath As String = LeadtoolsExamples.Common.ImagesPath.Path 
      Try 
         Dim codecs As RasterCodecs = New RasterCodecs() 
         For i As Integer = 0 To 2 
            Dim index As Integer = i + 1 
            Dim imageFileName As String = imagesPath & "Image" & index.ToString() & ".jpg" 
 
            Dim item As RasterImageListItem = New RasterImageListItem() 
            item.Uri = New Uri(imageFileName) 
            item.Text = imageFileName 
            item.ShowText = True 
 
            item.Image = codecs.Load(imageFileName) 
            item.ImageSize = New Size(120, 120) 
            item.Width = 150 
            item.Height = 150 
            item.SelectedBackground = New SolidColorBrush(Colors.White) 
            item.SelectedForeground = New SolidColorBrush(Colors.Blue) 
 
            ' Select the first item 
            If i = 0 Then 
               item.IsSelected = True 
            End If 
 
            ' Add the item to the image list 
            imageList.Items.Add(item) 
         Next i 
      Catch ex As Exception 
         MessageBox.Show(ex.Message) 
      Finally 
      End Try 
 
      ' Add the ImageList to the Window. 
      Content = imageList 
   End Sub 
End Class 
 
Public Sub ImageListItem_RasterImageListItem(ByVal title As String) 
   Dim window As MyWindow1 = New MyWindow1(title) 
   window.Show() 
End Sub

Requirements

Target Platforms

Reference

RasterImageListItem Members

Leadtools.Windows.Controls Namespace

RasterImage and WPF/Silverlight

Help Version 19.0.2017.10.27

Leadtools.Windows.Controls Assembly

Introduction

Getting Started

Namespaces

Leadtools.Windows.Controls Namespace

Assemblies