How to start animation in WinForms image viewer?

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An ImageViewer can show animation, which is based on image collection. An image collection can be stored in ImageViewer or separately.

If images are loaded in image viewer and you need to animate images in image viewer, you need to change animation frame using the ImageViewer.SetFocusedIndexSync method.
Here is C#/VB.NET code that shows how to start animation in ImageViewer if images are loaded in image viewer:

/// <summary>
/// Shows animation in image viewer.
/// </summary>
/// <param name="viewer">An image viewer.</param>
/// <param name="delay">The animation delay in milliseconds.</param>
private void ShowAnimation(Vintasoft.Imaging.UI.ImageViewer viewer, int delay)
{
    // for each image in image collection of image viewer
    for (int i = 0; i < viewer.Images.Count; i++)
    {
        // change image in image viewer
        viewer.SetFocusedIndexSync(i);
        // sleep for a while
        System.Threading.Thread.Sleep(delay);
    }
}

VB.NET

''' <summary>
''' Shows animation in image viewer.
''' </summary>
''' <param name="viewer">An image viewer.</param>
''' <param name="delay">The animation delay in milliseconds.</param>
Private Sub ShowAnimation(viewer As Vintasoft.Imaging.UI.ImageViewer, delay As Integer)
    ' for each image in image collection of image viewer
    For i As Integer = 0 To viewer.Images.Count - 1
        ' change image in image viewer
        viewer.SetFocusedIndexSync(i)
        ' sleep for a while
        System.Threading.Thread.Sleep(delay)
    Next
End Sub

If images are stored separately from image viewer and you need to animate images, you need to change animation frame using the ImageViewer.Image property.

Here is C#/VB.NET code that shows how to capture images from camera and show captured images in in ImageViewer:

/// <summary>
/// Image capture source.
/// </summary>
Vintasoft.Imaging.Media.ImageCaptureSource _imageCaptureSource;



/// <summary>
/// Initializes a new instance of the <see cref="MainForm"/> class.
/// </summary>
public MainForm()
{
    InitializeComponent();

    // get available image capture devices
    System.Collections.ObjectModel.ReadOnlyCollection<Vintasoft.Imaging.Media.ImageCaptureDevice> availableDevices =
        Vintasoft.Imaging.Media.ImageCaptureDeviceConfiguration.GetCaptureDevices();

    // create new image capture source
    _imageCaptureSource = new Vintasoft.Imaging.Media.ImageCaptureSource();
    _imageCaptureSource.CaptureCompleted +=
        new System.EventHandler<Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs>(ImageCaptureSource_CaptureCompleted);

    // if there are available devices
    if (availableDevices.Count != 0)
    {
        // use the first image capture device
        _imageCaptureSource.CaptureDevice = availableDevices[0];
    }

    Shown += new System.EventHandler(MainForm_Shown);
    FormClosed += new System.Windows.Forms.FormClosedEventHandler(MainForm_FormClosed);
}



/// <summary>
/// Starts capturing from camera.
/// </summary>
private void MainForm_Shown(object sender, System.EventArgs e)
{
    // if capture device is empty
    if (_imageCaptureSource.CaptureDevice != null)
    {
        // start the image capture source
        _imageCaptureSource.Start();
        // initialize new image capture request
        _imageCaptureSource.CaptureAsync();
    }
}

/// <summary>
/// Image is captured.
/// </summary>
private void ImageCaptureSource_CaptureCompleted(object sender, Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs e)
{
    // save reference to the previously captured image
    Vintasoft.Imaging.VintasoftImage oldImage = imageViewer1.Image;

    // get captured image and show captured image in the image viewer
    imageViewer1.Image = e.GetCapturedImage();

    // if previously captured image exists
    if (oldImage != null)
    {
        // dispose previously captured image
        oldImage.Dispose();
    }

    // if capture source is started
    if (_imageCaptureSource.State == Vintasoft.Imaging.Media.ImageCaptureState.Started)
    {
        // initialize new image capture request
        _imageCaptureSource.CaptureAsync();
    }
}

/// <summary>
/// Form is closed.
/// </summary>
private void MainForm_FormClosed(object sender, System.Windows.Forms.FormClosedEventArgs e)
{
    // stop the image capture source
    _imageCaptureSource.Stop();
}

VB.NET

''' <summary>
''' Image capture source.
''' </summary>
Private _imageCaptureSource As Vintasoft.Imaging.Media.ImageCaptureSource



''' <summary>
''' Initializes a new instance of the <see cref="MainForm"/> class.
''' </summary>
Public Sub New()
    InitializeComponent()

    ' get available image capture devices
    Dim availableDevices As System.Collections.ObjectModel.ReadOnlyCollection(Of Vintasoft.Imaging.Media.ImageCaptureDevice) = Vintasoft.Imaging.Media.ImageCaptureDeviceConfiguration.GetCaptureDevices()

    ' create new image capture source
    _imageCaptureSource = New Vintasoft.Imaging.Media.ImageCaptureSource()
    AddHandler _imageCaptureSource.CaptureCompleted, New System.EventHandler(Of Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs)(AddressOf ImageCaptureSource_CaptureCompleted)

    ' if there are available devices
    If availableDevices.Count <> 0 Then
        ' use the first image capture device
        _imageCaptureSource.CaptureDevice = availableDevices(0)
    End If

    AddHandler Shown, New System.EventHandler(AddressOf MainForm_Shown)
    AddHandler FormClosed, New System.Windows.Forms.FormClosedEventHandler(AddressOf MainForm_FormClosed)
End Sub



''' <summary>
''' Starts capturing from camera.
''' </summary>
Private Sub MainForm_Shown(sender As Object, e As System.EventArgs)
    ' if capture device is empty
    If _imageCaptureSource.CaptureDevice IsNot Nothing Then
        ' start the image capture source
        _imageCaptureSource.Start()
        ' initialize new image capture request
        _imageCaptureSource.CaptureAsync()
    End If
End Sub

''' <summary>
''' Image is captured.
''' </summary>
Private Sub ImageCaptureSource_CaptureCompleted(sender As Object, e As Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs)
    ' save reference to the previously captured image
    Dim oldImage As Vintasoft.Imaging.VintasoftImage = imageViewer1.Image

    ' get captured image and show captured image in the image viewer
    imageViewer1.Image = e.GetCapturedImage()

    ' if previously captured image exists
    If oldImage IsNot Nothing Then
        ' dispose previously captured image
        oldImage.Dispose()
    End If

    ' if capture source is started
    If _imageCaptureSource.State = Vintasoft.Imaging.Media.ImageCaptureState.Started Then
        ' initialize new image capture request
        _imageCaptureSource.CaptureAsync()
    End If
End Sub

''' <summary>
''' Form is closed.
''' </summary>
Private Sub MainForm_FormClosed(sender As Object, e As System.Windows.Forms.FormClosedEventArgs)
    ' stop the image capture source
    _imageCaptureSource.[Stop]()
End Sub

Also, you can use AnimatedImageViewer to show animation.

Here is C#/VB.NET code that shows how to show animation from GIF image file in AnimatedImageViewer:

/// <summary>
/// Shows animation in animated image viewer.
/// </summary>
/// <param name="viewer">An animated image viewer.</param>
/// <param name="filename">The filename.</param>
private void StartAnimation(Vintasoft.Imaging.UI.AnimatedImageViewer viewer, string filename)
{
    // if image collection of the image viewer is not empty
    if (viewer.Images.Count > 0)
    {
        // clear the image collection of the image viewer
        viewer.Images.ClearAndDisposeItems();
    }

    // open the file
    viewer.Images.Add(filename);
    // start the animation
    viewer.Animation = true;
}

VB.NET

''' <summary>
''' Shows animation in animated image viewer.
''' </summary>
''' <param name="viewer">An animated image viewer.</param>
''' <param name="filename">The filename.</param>
Private Sub StartAnimation(viewer As Vintasoft.Imaging.UI.AnimatedImageViewer, filename As String)
    ' if image collection of the image viewer is not empty
    If viewer.Images.Count > 0 Then
        ' clear the image collection of the image viewer
        viewer.Images.ClearAndDisposeItems()
    End If

    ' open the file
    viewer.Images.Add(filename)
    ' start the animation
    viewer.Animation = True
End Sub

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