ImageViewerActiveItemInteractiveMode Class

C#
Visual Basic
Objective-C
Java

public class ImageViewerActiveItemInteractiveMode : ImageViewerInteractiveMode

'Declaration

Public Class ImageViewerActiveItemInteractiveMode 
   Inherits ImageViewerInteractiveMode

ImageViewerActiveItemInteractiveMode derives from ImageViewerInteractiveMode and subscribes to the following events of the InteractiveService:

DragStarted
Move if IsHoverEnabled is true
KeyDown if IsKeyboardEnabled is true

ImageViewerActiveItemInteractiveMode changes the current ActiveItem as follows:

If the user clicks on an item, it will become the new ActiveItem.
If IsKeyboardEnabled is set to true, the moving using the arrow, page up/down, home and end key will also set the ActiveItem. This works as a "grid" using the current ViewLayout. For example, if you press down, the item below the current active item (if any) will become the new active. If you press left, the item to the left of the current item will become the new active item and so on.
If the value of IsHoverEnabled is set to true, then moving the mouse over an item will change its IsHovered to true, moving the mouse away from the item sets it back to false. If you changed the image viewer appearance to have different styles for hovered item then the UI will give indication of this operation. For more information refer to Image Viewer Appearance.

For more information, refer to Image Viewer Interactive Modes.

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

Copy Code

Imports Leadtools
Imports Leadtools.Controls
Imports Leadtools.Codecs
Imports Leadtools.Drawing
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color

<TestMethod>
Public Sub ImageViewerActiveItemInteractiveModeExample()
   _imageViewer.InteractiveModes.BeginUpdate()
   Dim mode As New MyImageViewerInteractivMode
   mode.IsHoverEnabled = True
   mode.IsKeyboardEnabled = True
   _imageViewer.InteractiveModes.Add(mode)
   _imageViewer.InteractiveModes.EndUpdate()
End Sub
Public Class MyImageViewerInteractivMode : Inherits ImageViewerActiveItemInteractiveMode
   Public Sub New()
   End Sub

   Public Overrides ReadOnly Property Name() As String
      Get
         Return "MyImageViewerInteractivMode"
      End Get
   End Property

   Public Overrides ReadOnly Property Id() As Integer
      Get
         Return ImageViewerInteractiveMode.UserModeId
      End Get
   End Property

   Public Overrides Sub Start(ByVal imageViewer As ImageViewer)
      MyBase.Start(imageViewer)
      Dim service As InteractiveService = MyBase.InteractiveService
      AddHandler service.Tap, AddressOf service_Tap
   End Sub

   Public Overrides Sub [Stop](ByVal imageViewer As ImageViewer)
      If IsStarted Then
         Dim service As InteractiveService = MyBase.InteractiveService
         RemoveHandler service.Tap, AddressOf service_Tap
         MyBase.Stop(imageViewer)
      End If
   End Sub

   Private Sub service_Tap(ByVal sender As Object, ByVal e As InteractiveEventArgs)
      If CanStartWork(e) Then
         e.IsHandled = True
         OnWorkStarted(EventArgs.Empty)

         Dim imageViewer As ImageViewer = Me.ImageViewer

         imageViewer.BeginRender()
         ' ...
         ' ...
         ' ...
         ' set your render code here
         ' ...
         ' ...
         ' ...
         imageViewer.EndRender()

         OnWorkCompleted(EventArgs.Empty)
      End If
   End Sub
End Class

using Leadtools;
using Leadtools.Controls;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;

public void ImageViewerActiveItemInteractiveModeExample()
{
   _imageViewer.InteractiveModes.BeginUpdate();
   _imageViewer.InteractiveModes.Add(new MyImageViewerInteractivMode { IsHoverEnabled = true, IsKeyboardEnabled = true });
   _imageViewer.InteractiveModes.EndUpdate();
}

Target Platforms

Reference

ImageViewerActiveItemInteractiveMode Members
Leadtools.Controls Namespace