ImageAnimator.Animate(Image, EventHandler) Methode

Definition

Namespace:

System.Drawing

Assembly:

System.Drawing.Common.dll

Paket:

System.Drawing.Common v8.0.0

Quelle:

ImageAnimator.cs

Zeigt ein Bild, das mehrere Frames enthält, als Animation an.

public:
 static void Animate(System::Drawing::Image ^ image, EventHandler ^ onFrameChangedHandler);

public static void Animate (System.Drawing.Image image, EventHandler onFrameChangedHandler);

static member Animate : System.Drawing.Image * EventHandler -> unit

Public Shared Sub Animate (image As Image, onFrameChangedHandler As EventHandler)

Parameter

image

Image

Das zu animierende Image-Objekt.

onFrameChangedHandler

EventHandler

Ein EventHandler-Objekt, das die beim Ändern des Animationsframes aufgerufene Methode angibt.

Beispiele

Diese Windows Forms Anwendung zeigt, wie sie ein animiertes Bild auf den Bildschirm zeichnen. Das Bild wird aus der animierten GIF-Datei erstellt SampleAnimation.gif sich im selben Ordner wie die Anwendung befinden.

#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

public ref class AnimateImageForm : public Form 
{

    // Create a Bitmap Object.
private:
    Bitmap^ animatedImage;
private:
    bool currentlyAnimating;

public:
    AnimateImageForm()
    {
        try
        {
            animatedImage = gcnew Bitmap("SampleAnimation.gif");
        }
        catch (ArgumentException^)
        {
            MessageBox::Show("Could not read the image file " +
                "\"SampleAnimation.gif\",\n" +
                "or it is not a valid image file.");
        }
    }

    // This method begins the animation.
public:
    void AnimateImage() 
    {
        // Begin the animation only once.
        // Make sure to animate only if animatedImage was
        // successfully initialised.
        if (!currentlyAnimating && animatedImage != nullptr)
        {
            ImageAnimator::Animate(animatedImage,
                gcnew EventHandler(this, &AnimateImageForm::OnFrameChanged));
            currentlyAnimating = true;
        }
    }

private:
    void OnFrameChanged(Object^ , EventArgs^ ) 
    {
        // Force a call to the Paint event handler.
        this->Invalidate();
    }

protected:
    virtual void OnPaint(PaintEventArgs^ e) override
    {
        // Begin the animation.
        AnimateImage();

        // Get the next frame ready for rendering.
        ImageAnimator::UpdateFrames();

        if (animatedImage != nullptr)
        {
            // Draw the next frame in the animation.
            e->Graphics->DrawImage(this->animatedImage,
                Point(0, 0));
        }
    }
};

[STAThread]
int main()
{
    Application::Run(gcnew AnimateImageForm());
}

using System;
using System.Drawing;
using System.Windows.Forms;

public class animateImage : Form 
{
                     
    //Create a Bitmpap Object.
    Bitmap animatedImage = new Bitmap("SampleAnimation.gif");
    bool currentlyAnimating = false;
                     
    //This method begins the animation.
    public void AnimateImage() 
    {
        if (!currentlyAnimating) 
        {
                     
            //Begin the animation only once.
            ImageAnimator.Animate(animatedImage, new EventHandler(this.OnFrameChanged));
            currentlyAnimating = true;
        }
    }

    private void OnFrameChanged(object o, EventArgs e) 
    {
                     
        //Force a call to the Paint event handler.
        this.Invalidate();
    }

    protected override void OnPaint(PaintEventArgs e) 
    {
                     
        //Begin the animation.
        AnimateImage();
                     
        //Get the next frame ready for rendering.
        ImageAnimator.UpdateFrames();
                     
        //Draw the next frame in the animation.
        e.Graphics.DrawImage(this.animatedImage, new Point(0, 0));
    }

    public static void Main() 
    {
        Application.Run(new animateImage());
    }
}

Imports System.Drawing
Imports System.Windows.Forms

Public Class animateImage
    Inherits Form

    'Create a Bitmpap Object.
    Private animatedImage As New Bitmap("SampleAnimation.gif")
    Private currentlyAnimating As Boolean = False

    'This method begins the animation.
    Public Sub AnimateImage()
        If Not currentlyAnimating Then

            'Begin the animation only once.
            ImageAnimator.Animate(animatedImage, _
            New EventHandler(AddressOf Me.OnFrameChanged))
            currentlyAnimating = True
        End If
    End Sub

    Private Sub OnFrameChanged(ByVal o As Object, ByVal e As EventArgs)

        'Force a call to the Paint event handler.
        Me.Invalidate()
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)

        'Begin the animation.
        AnimateImage()

        'Get the next frame ready for rendering.
        ImageAnimator.UpdateFrames()

        'Draw the next frame in the animation.
        e.Graphics.DrawImage(Me.animatedImage, New Point(0, 0))
    End Sub

    Public Shared Sub Main()
        Application.Run(New AnimateImage)
    End Sub
End Class

Hinweise

Hinweis

In .NET 6 und höheren Versionen wird das System.Drawing.Common-Paket, das diesen Typ enthält, nur unter Windows-Betriebssystemen unterstützt. Die Verwendung dieses Typs in plattformübergreifenden Apps führt zu Kompilierzeitwarnungen und Laufzeitausnahmen. Weitere Informationen finden Sie unter System.Drawing.Common wird nur unter Windows unterstützt.