How to start animation in WinForms image viewer?
In This Topic
An
ImageViewer can show animation, which is based on image collection.
An image collection can be stored in
ImageViewer or separately.
You need use the
ImageViewer.SetFocusedIndexSync method
if images are stored in
ImageViewerBase.Images property and you want to animate the images in
ImageViewer.
Here is C#/VB.NET code that shows how to start animation in
ImageViewer if images are stored in
ImageViewerBase.Images property:
/// <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);
}
}
''' <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
You need use the
ImageViewer.Image property
if images are stored in separate image collection and you want to animate the images in
ImageViewer.
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();
}
''' <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;
}
''' <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