IImageListItem Interface

Defines the properties required for an item in an ImageList control.

Object Model

Syntax

Visual Basic
C#
Objective-C
Java
C++

public interface IImageListItem

'Declaration
 
Public Interface IImageListItem

'Usage
 
Dim instance As IImageListItem

public interface class IImageListItem

Remarks

The IImageListItem interface defines the minimum properties required to for an item class that can be used with the ImageList control. The following classes implement this interface and are implemented by LEADTOOLS:

ImageListItem: For adding items that contain a WPF/Silverlight System.Windows.Media.ImageSource.
RasterImageListItem: For adding items that contain a LEADTOOLS Leadtools.RasterImage.

You can define your own classes that implement IImageListItem and use them with the LEADTOOLS ImageList control. The ImageList control derives from the WPF/Silverlight System.Windows.Controls.ItemsControl class and implements the the standard WPF binding using a ObservableCollection<IImageListItem> ItemsSource through the ImageList.ItemsSource property. Using binding, you can easily create a collection of your own image list items and add them to the control through code or markup. The example below shows you how to do that.

When using your own class that implements IImageListItem, the following items properties of the ImageList control will be used:

ImageList.ItemStyle
ImageList.ItemMargin
ImageList.ItemBorderThickness
ImageList.ItemBorderBrush
ImageList.ItemSize (will bind to IImageListItem.Width and IImageListItem.Height)
ImageList.ItemImageSize (will bind to IImageListItem.ImageSize
ImageList.ItemBackground (will bind to IImageListItem.Background
ImageList.ItemForeground (will bind to IImageListItem.Foreground

The following item properties will not be used:

ImageList.ItemSelectedBackground. instead, the default System.Windows.Controls.ListBox selection style will be used
ImageList.ItemSelectedForeground. instead, the default System.Windows.Controls.ListBox selection style will be used

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools.Windows.Controls

        Private Class MyImageListItem : Implements IImageListItem
#Region "IImageListItem Members"
            Private _background As Brush

            Public Property Background() As Brush Implements IImageListItem.Background
                Get
                    Return _background
                End Get
                Set(ByVal value As Brush)
                    _background = value
                End Set
            End Property

            Private _foreground As Brush

            Public Property Foreground() As Brush Implements IImageListItem.Foreground
                Get
                    Return _foreground
                End Get
                Set(ByVal value As Brush)
                    _foreground = value
                End Set
            End Property

            Private _height As Double = 100

            Public Property Height() As Double Implements IImageListItem.Height
                Get
                    Return _height
                End Get
                Set(ByVal value As Double)
                    _height = value
                End Set
            End Property

            Private _imageSize As Size

            Public Property ImageSize() As Size Implements IImageListItem.ImageSize
                Get
                    Return _imageSize
                End Get
                Set(ByVal value As Size)
                    _imageSize = value
                End Set
            End Property

            Private _source As ImageSource

            Public Property Source() As ImageSource Implements IImageListItem.Source
                Get
                    Return _source
                End Get
                Set(ByVal value As ImageSource)
                    _source = value
                End Set
            End Property

            Private _text As String

            Public Property Text() As String Implements IImageListItem.Text
                Get
                    Return _text
                End Get
                Set(ByVal value As String)
                    _text = value
                End Set
            End Property

            Private _uri As Uri

            Public Property Uri() As Uri Implements IImageListItem.Uri
                Get
                    Return _uri
                End Get
                Set(ByVal value As Uri)
                    _uri = value
                End Set
            End Property

            Private _width As Double = 100

            Public Property Width() As Double Implements IImageListItem.Width
                Get
                    Return _width
                End Get
                Set(ByVal value As Double)
                    _width = value
                End Set
            End Property
#End Region
        End Class

        Private Class MyWindow1 : Inherits Window
            Public imageList As ImageList
            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 ImageList()
                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 = LEAD_VARS.ImagesDir
                Dim items As ObservableCollection(Of IImageListItem) = New ObservableCollection(Of IImageListItem)()

                For i As Integer = 0 To 2
                    ' Load the image
                    Dim index As Integer = i + 1
                    Dim imageFileName As String = Path.Combine(imagesPath, "ImageProcessingDemo\Image" & index.ToString() & ".jpg")

                    Dim item As MyImageListItem = New MyImageListItem()
                    item.Source = New BitmapImage(New Uri(imageFileName))
                    item.Text = "item" & index.ToString()
                    item.Uri = New Uri(imageFileName)

                    ' Add the item to the image list
                    items.Add(item)
                Next i

                imageList.ItemsSource = items

                ' Add the ImageList to the Window.
                Content = imageList
            End Sub
        End Class

        Public Sub ImageList_IImageListItem(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;

class MyImageListItem : IImageListItem
{
   #region IImageListItem Members
   Brush _background;

   public Brush Background
   {
      get { return _background; }
      set { _background = value; }
   }

   Brush _foreground;

   public Brush Foreground
   {
      get { return _foreground; }
      set { _foreground = value; }
   }

   double _height = 100;

   public double Height
   {
      get { return _height; }
      set { _height = value; }
   }

   Size _imageSize;

   public Size ImageSize
   {
      get { return _imageSize; }
      set { _imageSize = value; }
   }

   ImageSource _source;

   public ImageSource Source
   {
      get { return _source; }
      set { _source = value; }
   }

   string _text;

   public string Text
   {
      get { return _text; }
      set { _text = value; }
   }

   Uri _uri;

   public Uri Uri
   {
      get { return _uri; }
      set { _uri = value; }
   }

   double _width = 100;

   public double Width
   {
      get { return _width; }
      set { _width = value; }
   }
   #endregion
}

class MyWindow1 : Window
{
   public ImageList imageList;
   public MyWindow1(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.Background = new RadialGradientBrush(Colors.DarkGray, Colors.LightGray);

      imageList.BorderThickness = new Thickness(5, 5, 5, 5);

      // Create three items
      string imagesPath = LEAD_VARS.ImagesDir;
      ObservableCollection<IImageListItem> items = new ObservableCollection<IImageListItem>();

      for (int i = 0; i < 3; i++)
      {
         // Load the image
         int index = i + 1;
         string imageFileName = Path.Combine(imagesPath, @"ImageProcessingDemo\Image" + index.ToString() + ".jpg");

         MyImageListItem item = new MyImageListItem();
         item.Source = new BitmapImage(new Uri(imageFileName));
         item.Text = "item" + index.ToString();
         item.Uri = new Uri(imageFileName);

         // Add the item to the image list
         items.Add(item);
      }

      imageList.ItemsSource = items;

      // Add the ImageList to the Window.
      Content = imageList;
   }
}

public void ImageList_IImageListItem(string title)
{
   MyWindow1 window = new MyWindow1(title);
   window.ShowDialog();
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

using Leadtools.Help;
using Leadtools.Windows.Controls;

class MyImageListItem : IImageListItem
{
   #region IImageListItem Members
   Brush _background;

   public Brush Background
   {
      get { return _background; }
      set { _background = value; }
   }

   Brush _foreground;

   public Brush Foreground
   {
      get { return _foreground; }
      set { _foreground = value; }
   }

   double _height = 100;

   public double Height
   {
      get { return _height; }
      set { _height = value; }
   }

   Size _imageSize;

   public Size ImageSize
   {
      get { return _imageSize; }
      set { _imageSize = value; }
   }

   ImageSource _source;

   public ImageSource Source
   {
      get { return _source; }
      set { _source = value; }
   }

   string _text;

   public string Text
   {
      get { return _text; }
      set { _text = value; }
   }

   Uri _uri;

   public Uri Uri
   {
      get { return _uri; }
      set { _uri = value; }
   }

   double _width = 100;

   public double Width
   {
      get { return _width; }
      set { _width = value; }
   }
   #endregion
}

class MyWindow1 : ChildWindow
{
   public ImageList imageList;
   public MyWindow1(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.Background = new RadialGradientBrush(Colors.DarkGray, Colors.LightGray);

      imageList.BorderThickness = new Thickness(5, 5, 5, 5);

      // Create three items
      string imagesPath = LeadtoolsExamples.Common.ImagesPath.Path;
      ObservableCollection<IImageListItem> items = new ObservableCollection<IImageListItem>();

      for (int i = 0; i < 3; i++)
      {
         // Load the image
         int index = i + 1;
         string imageFileName = imagesPath + "Image" + index.ToString() + ".jpg";

         MyImageListItem item = new MyImageListItem();
         item.Source = new BitmapImage(new Uri(imageFileName));
         item.Text = "item" + index.ToString();
         item.Uri = new Uri(imageFileName);

         // Add the item to the image list
         items.Add(item);
      }

      imageList.ItemsSource = items;

      // Add the ImageList to the Window.
      Content = imageList;
   }
}

public void ImageList_IImageListItem(string title)
{
   MyWindow1 window = new MyWindow1(title);
   window.Show();
}

Imports Leadtools
      Imports Leadtools.Windows.Controls

      Private Class MyImageListItem : Implements IImageListItem
#Region "IImageListItem Members"

         Private _background As Brush

         Public Property Background() As Brush Implements IImageListItem.Background
            Get
               Return _background
            End Get
            Set(ByVal value As Brush)
               _background = value
            End Set
         End Property

         Private _foreground As Brush

         Public Property Foreground() As Brush Implements IImageListItem.Foreground
            Get
               Return _foreground
            End Get
            Set(ByVal value As Brush)
               _foreground = value
            End Set
         End Property

         Private _height As Double = 100

         Public Property Height() As Double Implements IImageListItem.Height
            Get
               Return _height
            End Get
            Set(ByVal value As Double)
               _height = value
            End Set
         End Property

         Private _imageSize As Size

         Public Property ImageSize() As Size Implements IImageListItem.ImageSize
            Get
               Return _imageSize
            End Get
            Set(ByVal value As Size)
               _imageSize = value
            End Set
         End Property

         Private _source As ImageSource

         Public Property Source() As ImageSource Implements IImageListItem.Source
            Get
               Return _source
            End Get
            Set(ByVal value As ImageSource)
               _source = value
            End Set
         End Property

         Private _text As String

         Public Property Text() As String Implements IImageListItem.Text
            Get
               Return _text
            End Get
            Set(ByVal value As String)
               _text = value
            End Set
         End Property

         Private _uri As Uri

         Public Property Uri() As Uri Implements IImageListItem.Uri
            Get
               Return _uri
            End Get
            Set(ByVal value As Uri)
               _uri = value
            End Set
         End Property

         Private _width As Double = 100

         Public Property Width() As Double Implements IImageListItem.Width
            Get
               Return _width
            End Get
            Set(ByVal value As Double)
               _width = value
            End Set
         End Property
#End Region
      End Class

      Private Class MyWindow1 : Inherits ChildWindow
         Public imageList As ImageList
         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 ImageList()
            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
            Dim items As ObservableCollection(Of IImageListItem) = New ObservableCollection(Of IImageListItem)()

            For i As Integer = 0 To 2
               ' Load the image
               Dim index As Integer = i + 1
               Dim imageFileName As String = imagesPath & "Image" & index.ToString() & ".jpg"

               Dim item As MyImageListItem = New MyImageListItem()
               item.Source = New BitmapImage(New Uri(imageFileName))
               item.Text = "item" & index.ToString()
               item.Uri = New Uri(imageFileName)

               ' Add the item to the image list
               items.Add(item)
            Next i

            imageList.ItemsSource = items

            ' Add the ImageList to the Window.
            Content = imageList
         End Sub
      End Class

      Public Sub ImageList_IImageListItem(ByVal title As String)
         Dim window As MyWindow1 = New MyWindow1(title)
         window.Show()
      End Sub

Requirements

Target Platforms

Reference

IImageListItem Members
Leadtools.Windows.Controls Namespace