Storyboard.Begin Metodo

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::FrameworkTemplate ^ frameworkTemplate, System::Windows::Media::Animation::HandoffBehavior handoffBehavior, bool isControllable);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.FrameworkTemplate frameworkTemplate, System.Windows.Media.Animation.HandoffBehavior handoffBehavior, bool isControllable);

member this.Begin : System.Windows.FrameworkElement * System.Windows.FrameworkTemplate * System.Windows.Media.Animation.HandoffBehavior * bool -> unit

Public Sub Begin (containingObject As FrameworkElement, frameworkTemplate As FrameworkTemplate, handoffBehavior As HandoffBehavior, isControllable As Boolean)

Parametri

Commenti

Per controllare in modo interattivo questo storyboard, è necessario specificare lo stesso containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

Uso di Compose HandoffBehavior

Quando si applica un Storyboard, AnimationTimelineo AnimationClock a una proprietà utilizzando l'ComposeHandoffBehavior, tutti gli oggetti Clock precedentemente associati a tale proprietà continuano a utilizzare le risorse di sistema; il sistema di temporizzazione non rimuove automaticamente questi orologi.

Per evitare problemi di prestazioni quando si applica un numero elevato di orologi usando Compose, è necessario rimuovere i clock di composizione dalla proprietà animata dopo il completamento. Esistono diversi modi per rimuovere un orologio.

• Per rimuovere tutti gli orologi da una proprietà, utilizzare il metodo ApplyAnimationClock(DependencyProperty, AnimationClock) o BeginAnimation(DependencyProperty, AnimationTimeline) dell'oggetto animato. Specificare la proprietà animata come primo parametro e null come seconda. In questo modo tutti gli orologi di animazione vengono rimossi dalla proprietà .

• Per rimuovere un AnimationClock specifico da un elenco di orologi, utilizzare la proprietà Controller del AnimationClock per recuperare un ClockController, quindi chiamare il metodo Remove del ClockController. Questa operazione viene in genere eseguita nel gestore eventi Completed per un orologio. Si noti che solo gli orologi radice possono essere controllati da un ClockController; la proprietà Controller di un orologio figlio restituisce null. Si noti anche che l'evento Completed non viene chiamato se la durata effettiva dell'orologio è per sempre. In tal caso, l'utente deve determinare quando chiamare Remove.

Si tratta principalmente di un problema per le animazioni sugli oggetti che hanno una durata prolungata. Quando un oggetto viene sottoposto a Garbage Collection, anche i relativi orologi vengono disconnessi e sottoposto a Garbage Collection.

Per altre informazioni sugli oggetti clock, vedere Animation and Timing System Overview.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::Media::Animation::HandoffBehavior handoffBehavior, bool isControllable);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.Media.Animation.HandoffBehavior handoffBehavior, bool isControllable);

member this.Begin : System.Windows.FrameworkElement * System.Windows.Media.Animation.HandoffBehavior * bool -> unit

Public Sub Begin (containingObject As FrameworkElement, handoffBehavior As HandoffBehavior, isControllable As Boolean)

Parametri

Esempio

Nell'esempio seguente viene illustrato come creare uno storyboard controllabile.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace SDKSample
{

    public class ControllableStoryboardExample : Page
    {
        private Storyboard myStoryboard;

        public ControllableStoryboardExample()
        {

            // Create a name scope for the page.

            NameScope.SetNameScope(this, new NameScope()); 
 
            this.WindowTitle = "Controllable Storyboard Example";
            StackPanel myStackPanel = new StackPanel();
            myStackPanel.Margin = new Thickness(10);

            // Create a rectangle.
            Rectangle myRectangle = new Rectangle();
            myRectangle.Name = "myRectangle";

            // Assign the rectangle a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations.
            this.RegisterName(myRectangle.Name, myRectangle);
            myRectangle.Width = 100;
            myRectangle.Height = 100;
            myRectangle.Fill = Brushes.Blue;
            myStackPanel.Children.Add(myRectangle);

            //
            // Create an animation and a storyboard to animate the
            // rectangle.
            //
            DoubleAnimation myDoubleAnimation = new DoubleAnimation();
            myDoubleAnimation.From = 1.0;
            myDoubleAnimation.To = 0.0;
            myDoubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(5000));
            myDoubleAnimation.AutoReverse = true;

            // Create the storyboard.
            myStoryboard = new Storyboard();
            myStoryboard.Children.Add(myDoubleAnimation);
            Storyboard.SetTargetName(myDoubleAnimation, myRectangle.Name);
            Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Rectangle.OpacityProperty));

            //
            // Create some buttons to control the storyboard
            // and a panel to contain them.
            //
            StackPanel buttonPanel = new StackPanel();
            buttonPanel.Orientation = Orientation.Horizontal;
            Button beginButton = new Button();
            beginButton.Content = "Begin";
            beginButton.Click += new RoutedEventHandler(beginButton_Clicked);
            buttonPanel.Children.Add(beginButton);
            Button pauseButton = new Button();
            pauseButton.Content = "Pause";
            pauseButton.Click += new RoutedEventHandler(pauseButton_Clicked);
            buttonPanel.Children.Add(pauseButton);
            Button resumeButton = new Button();
            resumeButton.Content = "Resume";
            resumeButton.Click += new RoutedEventHandler(resumeButton_Clicked);
            buttonPanel.Children.Add(resumeButton);
            Button skipToFillButton = new Button();
            skipToFillButton.Content = "Skip to Fill";
            skipToFillButton.Click += new RoutedEventHandler(skipToFillButton_Clicked);
            buttonPanel.Children.Add(skipToFillButton);
            Button setSpeedRatioButton = new Button();
            setSpeedRatioButton.Content = "Triple Speed";
            setSpeedRatioButton.Click += new RoutedEventHandler(setSpeedRatioButton_Clicked);
            buttonPanel.Children.Add(setSpeedRatioButton);
            Button stopButton = new Button();
            stopButton.Content = "Stop";
            stopButton.Click += new RoutedEventHandler(stopButton_Clicked);
            buttonPanel.Children.Add(stopButton);
            myStackPanel.Children.Add(buttonPanel);
            this.Content = myStackPanel;        
        }

        // Begins the storyboard.
        private void beginButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Specifying "true" as the second Begin parameter
            // makes this storyboard controllable.
            myStoryboard.Begin(this, true);
        }

        // Pauses the storyboard.
        private void pauseButton_Clicked(object sender, RoutedEventArgs args)
        {
            myStoryboard.Pause(this);
        }

        // Resumes the storyboard.
        private void resumeButton_Clicked(object sender, RoutedEventArgs args)
        {
            myStoryboard.Resume(this);
        }

        // Advances the storyboard to its fill period.
        private void skipToFillButton_Clicked(object sender, RoutedEventArgs args)
        {
            myStoryboard.SkipToFill(this);
        }

        // Updates the storyboard's speed.
        private void setSpeedRatioButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(this, 3);
        }

        // Stops the storyboard.
        private void stopButton_Clicked(object sender, RoutedEventArgs args)
        {
            myStoryboard.Stop(this);
        }         
    }
}

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Shapes
Imports System.Windows.Media
Imports System.Windows.Media.Animation

Namespace SDKSample

    Public Class ControllableStoryboardExample
        Inherits Page
        Private myStoryboard As Storyboard

        Public Sub New()

            ' Create a name scope for the page.

            NameScope.SetNameScope(Me, New NameScope())

            Me.WindowTitle = "Controllable Storyboard Example"
            Dim myStackPanel As New StackPanel()
            myStackPanel.Margin = New Thickness(10)

            ' Create a rectangle.
            Dim myRectangle As New Rectangle()
            myRectangle.Name = "myRectangle"

            ' Assign the rectangle a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations.
            Me.RegisterName(myRectangle.Name, myRectangle)
            myRectangle.Width = 100
            myRectangle.Height = 100
            myRectangle.Fill = Brushes.Blue
            myStackPanel.Children.Add(myRectangle)

            '
            ' Create an animation and a storyboard to animate the
            ' rectangle.
            '
            Dim myDoubleAnimation As New DoubleAnimation()
            myDoubleAnimation.From = 1.0
            myDoubleAnimation.To = 0.0
            myDoubleAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(5000))
            myDoubleAnimation.AutoReverse = True

            ' Create the storyboard.
            myStoryboard = New Storyboard()
            myStoryboard.Children.Add(myDoubleAnimation)
            Storyboard.SetTargetName(myDoubleAnimation, myRectangle.Name)
            Storyboard.SetTargetProperty(myDoubleAnimation, New PropertyPath(Rectangle.OpacityProperty))

            '
            ' Create some buttons to control the storyboard
            ' and a panel to contain them.
            '
            Dim buttonPanel As New StackPanel()
            buttonPanel.Orientation = Orientation.Horizontal
            Dim beginButton As New Button()
            beginButton.Content = "Begin"
            AddHandler beginButton.Click, AddressOf beginButton_Clicked
            buttonPanel.Children.Add(beginButton)
            Dim pauseButton As New Button()
            pauseButton.Content = "Pause"
            AddHandler pauseButton.Click, AddressOf pauseButton_Clicked
            buttonPanel.Children.Add(pauseButton)
            Dim resumeButton As New Button()
            resumeButton.Content = "Resume"
            AddHandler resumeButton.Click, AddressOf resumeButton_Clicked
            buttonPanel.Children.Add(resumeButton)
            Dim skipToFillButton As New Button()
            skipToFillButton.Content = "Skip to Fill"
            AddHandler skipToFillButton.Click, AddressOf skipToFillButton_Clicked
            buttonPanel.Children.Add(skipToFillButton)
            Dim setSpeedRatioButton As New Button()
            setSpeedRatioButton.Content = "Triple Speed"
            AddHandler setSpeedRatioButton.Click, AddressOf setSpeedRatioButton_Clicked
            buttonPanel.Children.Add(setSpeedRatioButton)
            Dim stopButton As New Button()
            stopButton.Content = "Stop"
            AddHandler stopButton.Click, AddressOf stopButton_Clicked
            buttonPanel.Children.Add(stopButton)
            myStackPanel.Children.Add(buttonPanel)
            Me.Content = myStackPanel


        End Sub

        ' Begins the storyboard.
        Private Sub beginButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Specifying "true" as the second Begin parameter
            ' makes this storyboard controllable.
            myStoryboard.Begin(Me, True)

        End Sub

        ' Pauses the storyboard.
        Private Sub pauseButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            myStoryboard.Pause(Me)

        End Sub

        ' Resumes the storyboard.
        Private Sub resumeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            myStoryboard.Resume(Me)

        End Sub

        ' Advances the storyboard to its fill period.
        Private Sub skipToFillButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            myStoryboard.SkipToFill(Me)

        End Sub

        ' Updates the storyboard's speed.
        Private Sub setSpeedRatioButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(Me, 3)

        End Sub

        ' Stops the storyboard.
        Private Sub stopButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            myStoryboard.Stop(Me)

        End Sub

    End Class

End Namespace

Nell'esempio seguente viene usato il SnapshotAndReplaceHandoffBehavior per animare quando l'utente fa clic con il pulsante sinistro del mouse e il ComposeHandoffBehavior quando l'utente fa clic con il pulsante destro del mouse.

/*

   This sample animates the position of an ellipse when 
   the user clicks within the main border. If the user
   left-clicks, the SnapshotAndReplace HandoffBehavior
   is used when applying the animations. If the user
   right-clicks, the Compose HandoffBehavior is used
   instead.

*/

using System;
using System.Windows;
using System.Windows.Navigation;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls;
using System.Windows.Input;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{

    // Create the demonstration.
    public class FrameworkElementStoryboardHandoffBehaviorExample : Page {

        private Border containerBorder;
        private Ellipse interactiveEllipse;
        private Storyboard theStoryboard;
        private DoubleAnimation xAnimation;
        private DoubleAnimation yAnimation;
        
        public FrameworkElementStoryboardHandoffBehaviorExample()
        {
        
            WindowTitle = "Interactive Animation Example";
            
            // Create a name scope for the page.
            NameScope.SetNameScope(this, new NameScope());  
            
            DockPanel myPanel = new DockPanel();
            myPanel.Margin = new Thickness(20.0);            
    
            containerBorder = new Border();
            containerBorder.Background = Brushes.White;
            containerBorder.BorderBrush = Brushes.Black;
            containerBorder.BorderThickness = new Thickness(2.0); 
            containerBorder.VerticalAlignment = VerticalAlignment.Stretch;
            
            interactiveEllipse = new Ellipse();
            interactiveEllipse.Fill = Brushes.Lime;
            interactiveEllipse.Stroke = Brushes.Black;
            interactiveEllipse.StrokeThickness = 2.0;
            interactiveEllipse.Width = 25;
            interactiveEllipse.Height = 25;
            interactiveEllipse.HorizontalAlignment = HorizontalAlignment.Left;
            interactiveEllipse.VerticalAlignment = VerticalAlignment.Top;

            TranslateTransform interactiveTranslateTransform = new TranslateTransform();       
            this.RegisterName("InteractiveTranslateTransform", interactiveTranslateTransform);
            
            interactiveEllipse.RenderTransform = 
                interactiveTranslateTransform;
                
            xAnimation = new DoubleAnimation();
            xAnimation.Duration = TimeSpan.FromSeconds(4);
            yAnimation = xAnimation.Clone();
            Storyboard.SetTargetName(xAnimation, "InteractiveTranslateTransform");
            Storyboard.SetTargetProperty(xAnimation, new PropertyPath(TranslateTransform.XProperty));
            Storyboard.SetTargetName(yAnimation, "InteractiveTranslateTransform");
            Storyboard.SetTargetProperty(yAnimation, new PropertyPath(TranslateTransform.YProperty));            
            
            theStoryboard = new Storyboard();
            theStoryboard.Children.Add(xAnimation);
            theStoryboard.Children.Add(yAnimation);

            containerBorder.MouseLeftButtonDown += 
                new MouseButtonEventHandler(border_mouseLeftButtonDown);
            containerBorder.MouseRightButtonDown += 
                new MouseButtonEventHandler(border_mouseRightButtonDown);                
            
            containerBorder.Child = interactiveEllipse;
            myPanel.Children.Add(containerBorder);
            this.Content = myPanel;
        }

        // When the user left-clicks, use the 
        // SnapshotAndReplace HandoffBehavior when applying the animation.        
        private void border_mouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            Point targetPoint = new Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;  
            
            // Animate to the target point.
            xAnimation.To = targetPoint.X;
            yAnimation.To = targetPoint.Y;
            theStoryboard.Begin(this, HandoffBehavior.SnapshotAndReplace);

            // Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Lime;
        }
        
        // When the user right-clicks, use the 
        // Compose HandoffBehavior when applying the animation.
        private void border_mouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            // Find the point where the use clicked.
            Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            Point targetPoint = new Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;
 
            // Animate to the target point.
            xAnimation.To = targetPoint.X;
            yAnimation.To = targetPoint.Y;
            theStoryboard.Begin(this, HandoffBehavior.Compose);
                
            // Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Orange;
        }
    }
}

'
'
'   This sample animates the position of an ellipse when 
'   the user clicks within the main border. If the user
'   left-clicks, the SnapshotAndReplace HandoffBehavior
'   is used when applying the animations. If the user
'   right-clicks, the Compose HandoffBehavior is used
'   instead.
'
'


Imports System.Windows
Imports System.Windows.Navigation
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
Imports System.Windows.Controls
Imports System.Windows.Input

Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards

    ' Create the demonstration.
    Public Class FrameworkElementStoryboardHandoffBehaviorExample
        Inherits Page


        Private containerBorder As Border
        Private interactiveEllipse As Ellipse
        Private theStoryboard As Storyboard
        Private xAnimation As DoubleAnimation
        Private yAnimation As DoubleAnimation

        Public Sub New()

            WindowTitle = "Interactive Animation Example"

            ' Create a name scope for the page.
            NameScope.SetNameScope(Me, New NameScope())

            Dim myPanel As New DockPanel()
            myPanel.Margin = New Thickness(20.0)

            containerBorder = New Border()
            containerBorder.Background = Brushes.White
            containerBorder.BorderBrush = Brushes.Black
            containerBorder.BorderThickness = New Thickness(2.0)
            containerBorder.VerticalAlignment = VerticalAlignment.Stretch

            interactiveEllipse = New Ellipse()
            With interactiveEllipse
                .Fill = Brushes.Lime
                .Stroke = Brushes.Black
                .StrokeThickness = 2.0
                .Width = 25
                .Height = 25
                .HorizontalAlignment = HorizontalAlignment.Left
                .VerticalAlignment = VerticalAlignment.Top
            End With

            Dim interactiveTranslateTransform As New TranslateTransform()
            Me.RegisterName("InteractiveTranslateTransform", interactiveTranslateTransform)

            interactiveEllipse.RenderTransform = interactiveTranslateTransform

            xAnimation = New DoubleAnimation()
            xAnimation.Duration = TimeSpan.FromSeconds(4)
            yAnimation = xAnimation.Clone()
            Storyboard.SetTargetName(xAnimation, "InteractiveTranslateTransform")
            Storyboard.SetTargetProperty(xAnimation, New PropertyPath(TranslateTransform.XProperty))
            Storyboard.SetTargetName(yAnimation, "InteractiveTranslateTransform")
            Storyboard.SetTargetProperty(yAnimation, New PropertyPath(TranslateTransform.YProperty))

            theStoryboard = New Storyboard()
            theStoryboard.Children.Add(xAnimation)
            theStoryboard.Children.Add(yAnimation)


            AddHandler containerBorder.MouseLeftButtonDown, AddressOf border_mouseLeftButtonDown
            AddHandler containerBorder.MouseRightButtonDown, AddressOf border_mouseRightButtonDown

            containerBorder.Child = interactiveEllipse
            myPanel.Children.Add(containerBorder)
            Me.Content = myPanel
        End Sub


        ' When the user left-clicks, use the 
        ' SnapshotAndReplace HandoffBehavior when applying the animation.        
        Private Sub border_mouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            Dim clickPoint As Point = Mouse.GetPosition(containerBorder)

            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2

            ' Animate to the target point.
            xAnimation.To = targetPoint.X
            yAnimation.To = targetPoint.Y
            theStoryboard.Begin(Me, HandoffBehavior.SnapshotAndReplace)


            ' Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Lime

        End Sub

        ' When the user right-clicks, use the 
        ' Compose HandoffBehavior when applying the animation.
        Private Sub border_mouseRightButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            ' Find the point where the use clicked.
            Dim clickPoint As Point = Mouse.GetPosition(containerBorder)

            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2

            ' Animate to the target point.
            xAnimation.To = targetPoint.X
            yAnimation.To = targetPoint.Y
            theStoryboard.Begin(Me, HandoffBehavior.Compose)

            ' Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Orange


        End Sub

    End Class

End Namespace

Commenti

Per controllare in modo interattivo questo storyboard, è necessario usare lo stesso parametro containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

Uso di Compose HandoffBehavior

Quando si applica un Storyboard, AnimationTimelineo AnimationClock a una proprietà utilizzando l'ComposeHandoffBehavior, tutti gli oggetti Clock precedentemente associati a tale proprietà continuano a utilizzare le risorse di sistema; il sistema di temporizzazione non rimuove automaticamente questi orologi.

Per evitare problemi di prestazioni quando si applica un numero elevato di orologi usando Compose, è necessario rimuovere i clock di composizione dalla proprietà animata dopo il completamento. Esistono diversi modi per rimuovere un orologio.

• Per rimuovere tutti gli orologi da una proprietà, utilizzare il metodo ApplyAnimationClock(DependencyProperty, AnimationClock) o BeginAnimation(DependencyProperty, AnimationTimeline) dell'oggetto animato. Specificare la proprietà animata come primo parametro e null come seconda. In questo modo tutti gli orologi di animazione vengono rimossi dalla proprietà .

• Per rimuovere un AnimationClock specifico da un elenco di orologi, utilizzare la proprietà Controller del AnimationClock per recuperare un ClockController, quindi chiamare il metodo Remove del ClockController. Questa operazione viene in genere eseguita nel gestore eventi Completed per un orologio. Si noti che solo gli orologi radice possono essere controllati da un ClockController; la proprietà Controller di un orologio figlio restituisce null. Si noti anche che l'evento Completed non viene chiamato se la durata effettiva dell'orologio è per sempre. In tal caso, l'utente deve determinare quando chiamare Remove.

Si tratta principalmente di un problema per le animazioni sugli oggetti che hanno una durata prolungata. Quando un oggetto viene sottoposto a Garbage Collection, anche i relativi orologi vengono disconnessi e sottoposto a Garbage Collection.

Per altre informazioni sugli oggetti clock, vedere Animation and Timing System Overview.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::FrameworkTemplate ^ frameworkTemplate, System::Windows::Media::Animation::HandoffBehavior handoffBehavior);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.FrameworkTemplate frameworkTemplate, System.Windows.Media.Animation.HandoffBehavior handoffBehavior);

member this.Begin : System.Windows.FrameworkElement * System.Windows.FrameworkTemplate * System.Windows.Media.Animation.HandoffBehavior -> unit

Public Sub Begin (containingObject As FrameworkElement, frameworkTemplate As FrameworkTemplate, handoffBehavior As HandoffBehavior)

Parametri

Commenti

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

Uso di Compose HandoffBehavior

Quando si applica un Storyboard, AnimationTimelineo AnimationClock a una proprietà utilizzando l'ComposeHandoffBehavior, tutti gli oggetti Clock precedentemente associati a tale proprietà continuano a utilizzare le risorse di sistema; il sistema di temporizzazione non rimuove automaticamente questi orologi.

Per evitare problemi di prestazioni quando si applica un numero elevato di orologi usando Compose, è necessario rimuovere i clock di composizione dalla proprietà animata dopo il completamento. Esistono diversi modi per rimuovere un orologio.

• Per rimuovere tutti gli orologi da una proprietà, utilizzare il metodo ApplyAnimationClock(DependencyProperty, AnimationClock) o BeginAnimation(DependencyProperty, AnimationTimeline) dell'oggetto animato. Specificare la proprietà animata come primo parametro e null come seconda. In questo modo tutti gli orologi di animazione vengono rimossi dalla proprietà .

• Per rimuovere un AnimationClock specifico da un elenco di orologi, utilizzare la proprietà Controller del AnimationClock per recuperare un ClockController, quindi chiamare il metodo Remove del ClockController. Questa operazione viene in genere eseguita nel gestore eventi Completed per un orologio. Si noti che solo gli orologi radice possono essere controllati da un ClockController; la proprietà Controller di un orologio figlio restituisce null. Si noti anche che l'evento Completed non viene chiamato se la durata effettiva dell'orologio è per sempre. In tal caso, l'utente deve determinare quando chiamare Remove.

Si tratta principalmente di un problema per le animazioni sugli oggetti che hanno una durata prolungata. Quando un oggetto viene sottoposto a Garbage Collection, anche i relativi orologi vengono disconnessi e sottoposto a Garbage Collection.

Per altre informazioni sugli oggetti clock, vedere Animation and Timing System Overview.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::FrameworkTemplate ^ frameworkTemplate, bool isControllable);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.FrameworkTemplate frameworkTemplate, bool isControllable);

member this.Begin : System.Windows.FrameworkElement * System.Windows.FrameworkTemplate * bool -> unit

Public Sub Begin (containingObject As FrameworkElement, frameworkTemplate As FrameworkTemplate, isControllable As Boolean)

Parametri

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Per controllare in modo interattivo questo storyboard, è necessario specificare lo stesso containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

public:
 void Begin(System::Windows::FrameworkContentElement ^ containingObject, System::Windows::Media::Animation::HandoffBehavior handoffBehavior, bool isControllable);

public void Begin (System.Windows.FrameworkContentElement containingObject, System.Windows.Media.Animation.HandoffBehavior handoffBehavior, bool isControllable);

member this.Begin : System.Windows.FrameworkContentElement * System.Windows.Media.Animation.HandoffBehavior * bool -> unit

Public Sub Begin (containingObject As FrameworkContentElement, handoffBehavior As HandoffBehavior, isControllable As Boolean)

Parametri

Esempio

Nell'esempio seguente viene usato uno storyboard controllabile per animare un TextEffect. Il TextEffect è contenuto nell'ambito del nome di un FrameworkContentElement.

/*
    This example shows how to control
    a storyboard after it has started.

*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Documents;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
    public class FrameworkContentElementControlStoryboardExample : FlowDocument
    {
    
        private Storyboard myStoryboard;
        
        public FrameworkContentElementControlStoryboardExample()
        {
        
            // Create a name scope for the document.
            NameScope.SetNameScope(this, new NameScope());        
            this.Background = Brushes.White;
            
            // Create a run of text.
            Run theText = new Run( 
                "Lorem ipsum dolor sit amet, consectetuer adipiscing elit." + 
                "Ut non lacus. Nullam a ligula id leo adipiscing ornare." +
                " Duis mattis. ");   
                
            // Create a TextEffect
            TextEffect animatedSpecialEffect = new TextEffect();
            animatedSpecialEffect.Foreground = Brushes.OrangeRed;
            animatedSpecialEffect.PositionStart = 0;
            animatedSpecialEffect.PositionCount = 0;
            
            // Assign the TextEffect a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations            
            this.RegisterName("animatedSpecialEffect", animatedSpecialEffect);  
            
            // Apply the text effect to the run.
            theText.TextEffects = new TextEffectCollection();
            theText.TextEffects.Add(animatedSpecialEffect);
            
            // Create a paragraph to contain the run.
            Paragraph animatedParagraph = new Paragraph(theText);
            animatedParagraph.Background = Brushes.LightGray;
            animatedParagraph.Padding = new Thickness(20);
   
            this.Blocks.Add(animatedParagraph);            
            BlockUIContainer controlsContainer = new BlockUIContainer();                
            
            //
            // Create an animation and a storyboard to animate the
            // text effect.
            //
            Int32Animation countAnimation = 
                new Int32Animation(0, 127, TimeSpan.FromSeconds(10)); 
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect");
            Storyboard.SetTargetProperty(countAnimation, 
                new PropertyPath(TextEffect.PositionCountProperty));
            myStoryboard = new Storyboard();
            myStoryboard.Children.Add(countAnimation);
            
            //
            // Create some buttons to control the storyboard
            // and a panel to contain them.
            //
            StackPanel buttonPanel = new StackPanel();
            buttonPanel.Orientation = Orientation.Vertical;
            Button beginButton = new Button();
            beginButton.Content = "Begin";
            beginButton.Click += new RoutedEventHandler(beginButton_Clicked);            
            buttonPanel.Children.Add(beginButton);
            Button pauseButton = new Button();
            pauseButton.Content = "Pause";
            pauseButton.Click +=new RoutedEventHandler(pauseButton_Clicked);
            buttonPanel.Children.Add(pauseButton);
            Button resumeButton = new Button();
            resumeButton.Content = "Resume";
            resumeButton.Click +=new RoutedEventHandler(resumeButton_Clicked);
            buttonPanel.Children.Add(resumeButton);
            Button skipToFillButton = new Button();
            skipToFillButton.Content = "Skip to Fill";
            skipToFillButton.Click +=new RoutedEventHandler(skipToFillButton_Clicked);
            buttonPanel.Children.Add(skipToFillButton);
            Button setSpeedRatioButton = new Button();
            setSpeedRatioButton.Content = "Triple Speed";
            setSpeedRatioButton.Click +=new RoutedEventHandler(setSpeedRatioButton_Clicked);
            buttonPanel.Children.Add(setSpeedRatioButton);
            Button stopButton = new Button();
            stopButton.Content = "Stop";
            stopButton.Click +=new RoutedEventHandler(stopButton_Clicked);
            buttonPanel.Children.Add(stopButton);
            Button removeButton = new Button();
            removeButton.Content = "Remove";
            removeButton.Click +=new RoutedEventHandler(removeButton_Clicked);
            buttonPanel.Children.Add(removeButton); 
   
            controlsContainer.Child = buttonPanel; 
            this.Blocks.Add(controlsContainer);
        }
        
        // Begins the storyboard.
        private void beginButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Specifying "true" as the second Begin parameter
            // makes this storyboard controllable.
            myStoryboard.Begin(this, true);          
        }
        
        // Pauses the storyboard.
        private void pauseButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Pause(this);          
        }
        
        // Resumes the storyboard.
        private void resumeButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Resume(this);          
        }     
        
        // Advances the storyboard to its fill period.
        private void skipToFillButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.SkipToFill(this);          
        } 
        
        // Updates the storyboard's speed.
        private void setSpeedRatioButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(this, 3);          
        }           
        
        // Stops the storyboard.
        private void stopButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Stop(this);          
        }     
        
        // Removes the storyboard.
        private void removeButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Remove(this);          
        }           
    }
}

'
'    This example shows how to control
'    a storyboard after it has started.
'
'


Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Documents


Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
    Public Class FrameworkContentElementControlStoryboardExample
        Inherits FlowDocument

        Private myStoryboard As Storyboard

        Public Sub New()

            ' Create a name scope for the document.
            NameScope.SetNameScope(Me, New NameScope())
            Me.Background = Brushes.White

            ' Create a run of text.
            Dim theText As New Run("Lorem ipsum dolor sit amet, consectetuer adipiscing elit." & "Ut non lacus. Nullam a ligula id leo adipiscing ornare." & " Duis mattis. ")

            ' Create a TextEffect
            Dim animatedSpecialEffect As New TextEffect()
            animatedSpecialEffect.Foreground = Brushes.OrangeRed
            animatedSpecialEffect.PositionStart = 0
            animatedSpecialEffect.PositionCount = 0

            ' Assign the TextEffect a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations            
            Me.RegisterName("animatedSpecialEffect", animatedSpecialEffect)

            ' Apply the text effect to the run.
            theText.TextEffects = New TextEffectCollection()
            theText.TextEffects.Add(animatedSpecialEffect)

            ' Create a paragraph to contain the run.
            Dim animatedParagraph As New Paragraph(theText)
            animatedParagraph.Background = Brushes.LightGray
            animatedParagraph.Padding = New Thickness(20)

            Me.Blocks.Add(animatedParagraph)
            Dim controlsContainer As New BlockUIContainer()

            '
            ' Create an animation and a storyboard to animate the
            ' text effect.
            '
            Dim countAnimation As New Int32Animation(0, 127, TimeSpan.FromSeconds(10))
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect")
            Storyboard.SetTargetProperty(countAnimation, New PropertyPath(TextEffect.PositionCountProperty))
            myStoryboard = New Storyboard()
            myStoryboard.Children.Add(countAnimation)

            '
            ' Create some buttons to control the storyboard
            ' and a panel to contain them.
            '
            Dim buttonPanel As New StackPanel()
            buttonPanel.Orientation = Orientation.Vertical
            Dim beginButton As New Button()
            beginButton.Content = "Begin"
            AddHandler beginButton.Click, AddressOf beginButton_Clicked
            buttonPanel.Children.Add(beginButton)
            Dim pauseButton As New Button()
            pauseButton.Content = "Pause"
            AddHandler pauseButton.Click, AddressOf pauseButton_Clicked
            buttonPanel.Children.Add(pauseButton)
            Dim resumeButton As New Button()
            resumeButton.Content = "Resume"
            AddHandler resumeButton.Click, AddressOf resumeButton_Clicked
            buttonPanel.Children.Add(resumeButton)
            Dim skipToFillButton As New Button()
            skipToFillButton.Content = "Skip to Fill"
            AddHandler skipToFillButton.Click, AddressOf skipToFillButton_Clicked
            buttonPanel.Children.Add(skipToFillButton)
            Dim setSpeedRatioButton As New Button()
            setSpeedRatioButton.Content = "Triple Speed"
            AddHandler setSpeedRatioButton.Click, AddressOf setSpeedRatioButton_Clicked
            buttonPanel.Children.Add(setSpeedRatioButton)
            Dim stopButton As New Button()
            stopButton.Content = "Stop"
            AddHandler stopButton.Click, AddressOf stopButton_Clicked
            buttonPanel.Children.Add(stopButton)
            Dim removeButton As New Button()
            removeButton.Content = "Remove"
            AddHandler removeButton.Click, AddressOf removeButton_Clicked
            buttonPanel.Children.Add(removeButton)

            controlsContainer.Child = buttonPanel
            Me.Blocks.Add(controlsContainer)

        End Sub

        ' Begins the storyboard.
        Private Sub beginButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Specifying "true" as the second Begin parameter
            ' makes this storyboard controllable.
            myStoryboard.Begin(Me, True)

        End Sub

        ' Pauses the storyboard.
        Private Sub pauseButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Pause(Me)

        End Sub

        ' Resumes the storyboard.
        Private Sub resumeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Resume(Me)

        End Sub

        ' Advances the storyboard to its fill period.
        Private Sub skipToFillButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.SkipToFill(Me)

        End Sub

        ' Updates the storyboard's speed.
        Private Sub setSpeedRatioButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(Me, 3)

        End Sub

        ' Stops the storyboard.
        Private Sub stopButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Stop(Me)

        End Sub

        ' Removes the storyboard.
        Private Sub removeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Remove(Me)

        End Sub

    End Class
End Namespace

Nell'esempio seguente viene usato il SnapshotAndReplaceHandoffBehavior per animare quando l'utente fa clic con il pulsante sinistro del mouse e il ComposeHandoffBehavior quando l'utente fa clic con il pulsante destro del mouse.

/*
    This example shows how to animate
    a FrameworkContentElement with a storyboard.

*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Documents;
using System.Windows.Input;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
    public class FrameworkContentElementStoryboardWithHandoffBehaviorExample : 
        FlowDocument
    {
    
        private Storyboard myStoryboard;
        DoubleAnimation xAnimation;
        DoubleAnimation yAnimation;
        
        public FrameworkContentElementStoryboardWithHandoffBehaviorExample()
        {
        
            // Create a name scope for the document.
            NameScope.SetNameScope(this, new NameScope());        
            this.Background = Brushes.Orange;
            
            // Create a run of text.
            Run theText = new Run( 
                "Lorem ipsum dolor sit amet, consectetuer adipiscing elit.");   
                
            // Create a TextEffect
            TextEffect animatedSpecialEffect = new TextEffect();
            animatedSpecialEffect.Foreground = Brushes.OrangeRed;
            animatedSpecialEffect.PositionStart = 0;
            animatedSpecialEffect.PositionCount = 20;
            
            TranslateTransform animatedTransform = 
                new TranslateTransform();
                
            // Assign the transform a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations.      
            this.RegisterName("animatedTransform", animatedTransform);             
            animatedSpecialEffect.Transform = animatedTransform;

            // Apply the text effect to the run.
            theText.TextEffects = new TextEffectCollection();
            theText.TextEffects.Add(animatedSpecialEffect);

            // Create a paragraph to contain the run.
            Paragraph animatedParagraph = new Paragraph(theText);
            animatedParagraph.Background = Brushes.LightGray;           
   
            this.Blocks.Add(animatedParagraph);                           
            
            //
            // Create a storyboard to animate the
            // text effect's transform.
            //
            myStoryboard = new Storyboard();
            
            xAnimation = new DoubleAnimation();  
            xAnimation.Duration = TimeSpan.FromSeconds(5);                        
            Storyboard.SetTargetName(xAnimation, "animatedTransform");
            Storyboard.SetTargetProperty(xAnimation, 
                new PropertyPath(TranslateTransform.XProperty));      
            myStoryboard.Children.Add(xAnimation);
            
            yAnimation = new DoubleAnimation();
            yAnimation.Duration = TimeSpan.FromSeconds(5);           
            Storyboard.SetTargetName(yAnimation, "animatedTransform");
            Storyboard.SetTargetProperty(yAnimation, 
                new PropertyPath(TranslateTransform.YProperty));      
            myStoryboard.Children.Add(yAnimation);            
            
            this.MouseLeftButtonDown += 
                new MouseButtonEventHandler(document_mouseLeftButtonDown);
            this.MouseRightButtonDown += 
                new MouseButtonEventHandler(document_mouseRightButtonDown);
        }

        // When the user left-clicks, use the 
        // SnapshotAndReplace HandoffBehavior when applying the animation.        
        private void document_mouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            Point clickPoint = Mouse.GetPosition(this);

            // Animate to the target point.
            xAnimation.To = clickPoint.X; 
            yAnimation.To = clickPoint.Y;

            try
            {
                myStoryboard.Begin(this, HandoffBehavior.SnapshotAndReplace);  
            }catch(Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        
        // When the user right-clicks, use the 
        // Compose HandoffBehavior when applying the animation.
        private void document_mouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {

            Point clickPoint = Mouse.GetPosition(this);

            // Animate to the target point.
            xAnimation.To = clickPoint.X;
            yAnimation.To = clickPoint.Y;
            myStoryboard.Begin(this, HandoffBehavior.Compose);  
        }        
    }
}

'
'    This example shows how to animate
'    a FrameworkContentElement with a storyboard.
'
'


Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Documents
Imports System.Windows.Input


Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
    Public Class FrameworkContentElementStoryboardWithHandoffBehaviorExample
        Inherits FlowDocument

        Private myStoryboard As Storyboard
        Private xAnimation As DoubleAnimation
        Private yAnimation As DoubleAnimation

        Public Sub New()

            ' Create a name scope for the document.
            NameScope.SetNameScope(Me, New NameScope())
            Me.Background = Brushes.Orange

            ' Create a run of text.
            Dim theText As New Run("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.")

            ' Create a TextEffect
            Dim animatedSpecialEffect As New TextEffect()
            animatedSpecialEffect.Foreground = Brushes.OrangeRed
            animatedSpecialEffect.PositionStart = 0
            animatedSpecialEffect.PositionCount = 20

            Dim animatedTransform As New TranslateTransform()

            ' Assign the transform a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations.      
            Me.RegisterName("animatedTransform", animatedTransform)
            animatedSpecialEffect.Transform = animatedTransform


            ' Apply the text effect to the run.
            theText.TextEffects = New TextEffectCollection()
            theText.TextEffects.Add(animatedSpecialEffect)


            ' Create a paragraph to contain the run.
            Dim animatedParagraph As New Paragraph(theText)
            animatedParagraph.Background = Brushes.LightGray

            Me.Blocks.Add(animatedParagraph)

            '
            ' Create a storyboard to animate the
            ' text effect's transform.
            '
            myStoryboard = New Storyboard()

            xAnimation = New DoubleAnimation()
            xAnimation.Duration = TimeSpan.FromSeconds(5)
            Storyboard.SetTargetName(xAnimation, "animatedTransform")
            Storyboard.SetTargetProperty(xAnimation, New PropertyPath(TranslateTransform.XProperty))
            myStoryboard.Children.Add(xAnimation)

            yAnimation = New DoubleAnimation()
            yAnimation.Duration = TimeSpan.FromSeconds(5)
            Storyboard.SetTargetName(yAnimation, "animatedTransform")
            Storyboard.SetTargetProperty(yAnimation, New PropertyPath(TranslateTransform.YProperty))
            myStoryboard.Children.Add(yAnimation)

            AddHandler MouseLeftButtonDown, AddressOf document_mouseLeftButtonDown
            AddHandler MouseRightButtonDown, AddressOf document_mouseRightButtonDown

        End Sub



        ' When the user left-clicks, use the 
        ' SnapshotAndReplace HandoffBehavior when applying the animation.        
        Private Sub document_mouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            Dim clickPoint As Point = Mouse.GetPosition(Me)


            ' Animate to the target point.
            xAnimation.To = clickPoint.X
            yAnimation.To = clickPoint.Y

            Try
                myStoryboard.Begin(Me, HandoffBehavior.SnapshotAndReplace)

            Catch ex As Exception
                MessageBox.Show(ex.ToString())
            End Try
        End Sub

        ' When the user right-clicks, use the 
        ' Compose HandoffBehavior when applying the animation.
        Private Sub document_mouseRightButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)


            Dim clickPoint As Point = Mouse.GetPosition(Me)

            ' Animate to the target point.
            xAnimation.To = clickPoint.X
            yAnimation.To = clickPoint.Y
            myStoryboard.Begin(Me, HandoffBehavior.Compose)


        End Sub





    End Class
End Namespace

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff specificato.

Per controllare in modo interattivo questo storyboard, è necessario specificare lo stesso containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

Uso di Compose HandoffBehavior

Quando si applica un Storyboard, AnimationTimelineo AnimationClock a una proprietà utilizzando l'ComposeHandoffBehavior, tutti gli oggetti Clock precedentemente associati a tale proprietà continuano a utilizzare le risorse di sistema; il sistema di temporizzazione non rimuove automaticamente questi orologi.

Per evitare problemi di prestazioni quando si applica un numero elevato di orologi usando Compose, è necessario rimuovere i clock di composizione dalla proprietà animata dopo il completamento. Esistono diversi modi per rimuovere un orologio.

• Per rimuovere tutti gli orologi da una proprietà, utilizzare il metodo ApplyAnimationClock(DependencyProperty, AnimationClock) o BeginAnimation(DependencyProperty, AnimationTimeline) dell'oggetto animato. Specificare la proprietà animata come primo parametro e null come seconda. In questo modo tutti gli orologi di animazione vengono rimossi dalla proprietà .

• Per rimuovere un AnimationClock specifico da un elenco di orologi, utilizzare la proprietà Controller del AnimationClock per recuperare un ClockController, quindi chiamare il metodo Remove del ClockController. Questa operazione viene in genere eseguita nel gestore eventi Completed per un orologio. Si noti che solo gli orologi radice possono essere controllati da un ClockController; la proprietà Controller di un orologio figlio restituisce null. Si noti anche che l'evento Completed non viene chiamato se la durata effettiva dell'orologio è per sempre. In tal caso, l'utente deve determinare quando chiamare Remove.

Si tratta principalmente di un problema per le animazioni sugli oggetti che hanno una durata prolungata. Quando un oggetto viene sottoposto a Garbage Collection, anche i relativi orologi vengono disconnessi e sottoposto a Garbage Collection.

Per altre informazioni sugli oggetti clock, vedere Animation and Timing System Overview.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::FrameworkTemplate ^ frameworkTemplate);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.FrameworkTemplate frameworkTemplate);

member this.Begin : System.Windows.FrameworkElement * System.Windows.FrameworkTemplate -> unit

Public Sub Begin (containingObject As FrameworkElement, frameworkTemplate As FrameworkTemplate)

Parametri

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, System::Windows::Media::Animation::HandoffBehavior handoffBehavior);

public void Begin (System.Windows.FrameworkElement containingObject, System.Windows.Media.Animation.HandoffBehavior handoffBehavior);

member this.Begin : System.Windows.FrameworkElement * System.Windows.Media.Animation.HandoffBehavior -> unit

Public Sub Begin (containingObject As FrameworkElement, handoffBehavior As HandoffBehavior)

Parametri

Esempio

Nell'esempio seguente viene usato il SnapshotAndReplaceHandoffBehavior per animare quando l'utente fa clic con il pulsante sinistro del mouse e il ComposeHandoffBehavior quando l'utente fa clic con il pulsante destro del mouse.

/*

   This sample animates the position of an ellipse when 
   the user clicks within the main border. If the user
   left-clicks, the SnapshotAndReplace HandoffBehavior
   is used when applying the animations. If the user
   right-clicks, the Compose HandoffBehavior is used
   instead.

*/

using System;
using System.Windows;
using System.Windows.Navigation;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls;
using System.Windows.Input;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{

    // Create the demonstration.
    public class FrameworkElementStoryboardHandoffBehaviorExample : Page {

        private Border containerBorder;
        private Ellipse interactiveEllipse;
        private Storyboard theStoryboard;
        private DoubleAnimation xAnimation;
        private DoubleAnimation yAnimation;
        
        public FrameworkElementStoryboardHandoffBehaviorExample()
        {
        
            WindowTitle = "Interactive Animation Example";
            
            // Create a name scope for the page.
            NameScope.SetNameScope(this, new NameScope());  
            
            DockPanel myPanel = new DockPanel();
            myPanel.Margin = new Thickness(20.0);            
    
            containerBorder = new Border();
            containerBorder.Background = Brushes.White;
            containerBorder.BorderBrush = Brushes.Black;
            containerBorder.BorderThickness = new Thickness(2.0); 
            containerBorder.VerticalAlignment = VerticalAlignment.Stretch;
            
            interactiveEllipse = new Ellipse();
            interactiveEllipse.Fill = Brushes.Lime;
            interactiveEllipse.Stroke = Brushes.Black;
            interactiveEllipse.StrokeThickness = 2.0;
            interactiveEllipse.Width = 25;
            interactiveEllipse.Height = 25;
            interactiveEllipse.HorizontalAlignment = HorizontalAlignment.Left;
            interactiveEllipse.VerticalAlignment = VerticalAlignment.Top;

            TranslateTransform interactiveTranslateTransform = new TranslateTransform();       
            this.RegisterName("InteractiveTranslateTransform", interactiveTranslateTransform);
            
            interactiveEllipse.RenderTransform = 
                interactiveTranslateTransform;
                
            xAnimation = new DoubleAnimation();
            xAnimation.Duration = TimeSpan.FromSeconds(4);
            yAnimation = xAnimation.Clone();
            Storyboard.SetTargetName(xAnimation, "InteractiveTranslateTransform");
            Storyboard.SetTargetProperty(xAnimation, new PropertyPath(TranslateTransform.XProperty));
            Storyboard.SetTargetName(yAnimation, "InteractiveTranslateTransform");
            Storyboard.SetTargetProperty(yAnimation, new PropertyPath(TranslateTransform.YProperty));            
            
            theStoryboard = new Storyboard();
            theStoryboard.Children.Add(xAnimation);
            theStoryboard.Children.Add(yAnimation);

            containerBorder.MouseLeftButtonDown += 
                new MouseButtonEventHandler(border_mouseLeftButtonDown);
            containerBorder.MouseRightButtonDown += 
                new MouseButtonEventHandler(border_mouseRightButtonDown);                
            
            containerBorder.Child = interactiveEllipse;
            myPanel.Children.Add(containerBorder);
            this.Content = myPanel;
        }

        // When the user left-clicks, use the 
        // SnapshotAndReplace HandoffBehavior when applying the animation.        
        private void border_mouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            Point targetPoint = new Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;  
            
            // Animate to the target point.
            xAnimation.To = targetPoint.X;
            yAnimation.To = targetPoint.Y;
            theStoryboard.Begin(this, HandoffBehavior.SnapshotAndReplace);

            // Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Lime;
        }
        
        // When the user right-clicks, use the 
        // Compose HandoffBehavior when applying the animation.
        private void border_mouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            // Find the point where the use clicked.
            Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            Point targetPoint = new Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;
 
            // Animate to the target point.
            xAnimation.To = targetPoint.X;
            yAnimation.To = targetPoint.Y;
            theStoryboard.Begin(this, HandoffBehavior.Compose);
                
            // Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Orange;
        }
    }
}

'
'
'   This sample animates the position of an ellipse when 
'   the user clicks within the main border. If the user
'   left-clicks, the SnapshotAndReplace HandoffBehavior
'   is used when applying the animations. If the user
'   right-clicks, the Compose HandoffBehavior is used
'   instead.
'
'


Imports System.Windows
Imports System.Windows.Navigation
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
Imports System.Windows.Controls
Imports System.Windows.Input

Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards

    ' Create the demonstration.
    Public Class FrameworkElementStoryboardHandoffBehaviorExample
        Inherits Page


        Private containerBorder As Border
        Private interactiveEllipse As Ellipse
        Private theStoryboard As Storyboard
        Private xAnimation As DoubleAnimation
        Private yAnimation As DoubleAnimation

        Public Sub New()

            WindowTitle = "Interactive Animation Example"

            ' Create a name scope for the page.
            NameScope.SetNameScope(Me, New NameScope())

            Dim myPanel As New DockPanel()
            myPanel.Margin = New Thickness(20.0)

            containerBorder = New Border()
            containerBorder.Background = Brushes.White
            containerBorder.BorderBrush = Brushes.Black
            containerBorder.BorderThickness = New Thickness(2.0)
            containerBorder.VerticalAlignment = VerticalAlignment.Stretch

            interactiveEllipse = New Ellipse()
            With interactiveEllipse
                .Fill = Brushes.Lime
                .Stroke = Brushes.Black
                .StrokeThickness = 2.0
                .Width = 25
                .Height = 25
                .HorizontalAlignment = HorizontalAlignment.Left
                .VerticalAlignment = VerticalAlignment.Top
            End With

            Dim interactiveTranslateTransform As New TranslateTransform()
            Me.RegisterName("InteractiveTranslateTransform", interactiveTranslateTransform)

            interactiveEllipse.RenderTransform = interactiveTranslateTransform

            xAnimation = New DoubleAnimation()
            xAnimation.Duration = TimeSpan.FromSeconds(4)
            yAnimation = xAnimation.Clone()
            Storyboard.SetTargetName(xAnimation, "InteractiveTranslateTransform")
            Storyboard.SetTargetProperty(xAnimation, New PropertyPath(TranslateTransform.XProperty))
            Storyboard.SetTargetName(yAnimation, "InteractiveTranslateTransform")
            Storyboard.SetTargetProperty(yAnimation, New PropertyPath(TranslateTransform.YProperty))

            theStoryboard = New Storyboard()
            theStoryboard.Children.Add(xAnimation)
            theStoryboard.Children.Add(yAnimation)


            AddHandler containerBorder.MouseLeftButtonDown, AddressOf border_mouseLeftButtonDown
            AddHandler containerBorder.MouseRightButtonDown, AddressOf border_mouseRightButtonDown

            containerBorder.Child = interactiveEllipse
            myPanel.Children.Add(containerBorder)
            Me.Content = myPanel
        End Sub


        ' When the user left-clicks, use the 
        ' SnapshotAndReplace HandoffBehavior when applying the animation.        
        Private Sub border_mouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            Dim clickPoint As Point = Mouse.GetPosition(containerBorder)

            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2

            ' Animate to the target point.
            xAnimation.To = targetPoint.X
            yAnimation.To = targetPoint.Y
            theStoryboard.Begin(Me, HandoffBehavior.SnapshotAndReplace)


            ' Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Lime

        End Sub

        ' When the user right-clicks, use the 
        ' Compose HandoffBehavior when applying the animation.
        Private Sub border_mouseRightButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            ' Find the point where the use clicked.
            Dim clickPoint As Point = Mouse.GetPosition(containerBorder)

            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2

            ' Animate to the target point.
            xAnimation.To = targetPoint.X
            yAnimation.To = targetPoint.Y
            theStoryboard.Begin(Me, HandoffBehavior.Compose)

            ' Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Orange


        End Sub

    End Class

End Namespace

public:
 void Begin(System::Windows::FrameworkContentElement ^ containingObject, System::Windows::Media::Animation::HandoffBehavior handoffBehavior);

public void Begin (System.Windows.FrameworkContentElement containingObject, System.Windows.Media.Animation.HandoffBehavior handoffBehavior);

member this.Begin : System.Windows.FrameworkContentElement * System.Windows.Media.Animation.HandoffBehavior -> unit

Public Sub Begin (containingObject As FrameworkContentElement, handoffBehavior As HandoffBehavior)

Parametri

Esempio

Nell'esempio seguente viene usato il SnapshotAndReplaceHandoffBehavior per animare quando l'utente fa clic con il pulsante sinistro del mouse e il ComposeHandoffBehavior quando l'utente fa clic con il pulsante destro del mouse.

/*
    This example shows how to animate
    a FrameworkContentElement with a storyboard.

*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Documents;
using System.Windows.Input;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
    public class FrameworkContentElementStoryboardWithHandoffBehaviorExample : 
        FlowDocument
    {
    
        private Storyboard myStoryboard;
        DoubleAnimation xAnimation;
        DoubleAnimation yAnimation;
        
        public FrameworkContentElementStoryboardWithHandoffBehaviorExample()
        {
        
            // Create a name scope for the document.
            NameScope.SetNameScope(this, new NameScope());        
            this.Background = Brushes.Orange;
            
            // Create a run of text.
            Run theText = new Run( 
                "Lorem ipsum dolor sit amet, consectetuer adipiscing elit.");   
                
            // Create a TextEffect
            TextEffect animatedSpecialEffect = new TextEffect();
            animatedSpecialEffect.Foreground = Brushes.OrangeRed;
            animatedSpecialEffect.PositionStart = 0;
            animatedSpecialEffect.PositionCount = 20;
            
            TranslateTransform animatedTransform = 
                new TranslateTransform();
                
            // Assign the transform a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations.      
            this.RegisterName("animatedTransform", animatedTransform);             
            animatedSpecialEffect.Transform = animatedTransform;

            // Apply the text effect to the run.
            theText.TextEffects = new TextEffectCollection();
            theText.TextEffects.Add(animatedSpecialEffect);

            // Create a paragraph to contain the run.
            Paragraph animatedParagraph = new Paragraph(theText);
            animatedParagraph.Background = Brushes.LightGray;           
   
            this.Blocks.Add(animatedParagraph);                           
            
            //
            // Create a storyboard to animate the
            // text effect's transform.
            //
            myStoryboard = new Storyboard();
            
            xAnimation = new DoubleAnimation();  
            xAnimation.Duration = TimeSpan.FromSeconds(5);                        
            Storyboard.SetTargetName(xAnimation, "animatedTransform");
            Storyboard.SetTargetProperty(xAnimation, 
                new PropertyPath(TranslateTransform.XProperty));      
            myStoryboard.Children.Add(xAnimation);
            
            yAnimation = new DoubleAnimation();
            yAnimation.Duration = TimeSpan.FromSeconds(5);           
            Storyboard.SetTargetName(yAnimation, "animatedTransform");
            Storyboard.SetTargetProperty(yAnimation, 
                new PropertyPath(TranslateTransform.YProperty));      
            myStoryboard.Children.Add(yAnimation);            
            
            this.MouseLeftButtonDown += 
                new MouseButtonEventHandler(document_mouseLeftButtonDown);
            this.MouseRightButtonDown += 
                new MouseButtonEventHandler(document_mouseRightButtonDown);
        }

        // When the user left-clicks, use the 
        // SnapshotAndReplace HandoffBehavior when applying the animation.        
        private void document_mouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
        
            Point clickPoint = Mouse.GetPosition(this);

            // Animate to the target point.
            xAnimation.To = clickPoint.X; 
            yAnimation.To = clickPoint.Y;

            try
            {
                myStoryboard.Begin(this, HandoffBehavior.SnapshotAndReplace);  
            }catch(Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        
        // When the user right-clicks, use the 
        // Compose HandoffBehavior when applying the animation.
        private void document_mouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {

            Point clickPoint = Mouse.GetPosition(this);

            // Animate to the target point.
            xAnimation.To = clickPoint.X;
            yAnimation.To = clickPoint.Y;
            myStoryboard.Begin(this, HandoffBehavior.Compose);  
        }        
    }
}

'
'    This example shows how to animate
'    a FrameworkContentElement with a storyboard.
'
'


Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Documents
Imports System.Windows.Input


Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
    Public Class FrameworkContentElementStoryboardWithHandoffBehaviorExample
        Inherits FlowDocument

        Private myStoryboard As Storyboard
        Private xAnimation As DoubleAnimation
        Private yAnimation As DoubleAnimation

        Public Sub New()

            ' Create a name scope for the document.
            NameScope.SetNameScope(Me, New NameScope())
            Me.Background = Brushes.Orange

            ' Create a run of text.
            Dim theText As New Run("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.")

            ' Create a TextEffect
            Dim animatedSpecialEffect As New TextEffect()
            animatedSpecialEffect.Foreground = Brushes.OrangeRed
            animatedSpecialEffect.PositionStart = 0
            animatedSpecialEffect.PositionCount = 20

            Dim animatedTransform As New TranslateTransform()

            ' Assign the transform a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations.      
            Me.RegisterName("animatedTransform", animatedTransform)
            animatedSpecialEffect.Transform = animatedTransform


            ' Apply the text effect to the run.
            theText.TextEffects = New TextEffectCollection()
            theText.TextEffects.Add(animatedSpecialEffect)


            ' Create a paragraph to contain the run.
            Dim animatedParagraph As New Paragraph(theText)
            animatedParagraph.Background = Brushes.LightGray

            Me.Blocks.Add(animatedParagraph)

            '
            ' Create a storyboard to animate the
            ' text effect's transform.
            '
            myStoryboard = New Storyboard()

            xAnimation = New DoubleAnimation()
            xAnimation.Duration = TimeSpan.FromSeconds(5)
            Storyboard.SetTargetName(xAnimation, "animatedTransform")
            Storyboard.SetTargetProperty(xAnimation, New PropertyPath(TranslateTransform.XProperty))
            myStoryboard.Children.Add(xAnimation)

            yAnimation = New DoubleAnimation()
            yAnimation.Duration = TimeSpan.FromSeconds(5)
            Storyboard.SetTargetName(yAnimation, "animatedTransform")
            Storyboard.SetTargetProperty(yAnimation, New PropertyPath(TranslateTransform.YProperty))
            myStoryboard.Children.Add(yAnimation)

            AddHandler MouseLeftButtonDown, AddressOf document_mouseLeftButtonDown
            AddHandler MouseRightButtonDown, AddressOf document_mouseRightButtonDown

        End Sub



        ' When the user left-clicks, use the 
        ' SnapshotAndReplace HandoffBehavior when applying the animation.        
        Private Sub document_mouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)

            Dim clickPoint As Point = Mouse.GetPosition(Me)


            ' Animate to the target point.
            xAnimation.To = clickPoint.X
            yAnimation.To = clickPoint.Y

            Try
                myStoryboard.Begin(Me, HandoffBehavior.SnapshotAndReplace)

            Catch ex As Exception
                MessageBox.Show(ex.ToString())
            End Try
        End Sub

        ' When the user right-clicks, use the 
        ' Compose HandoffBehavior when applying the animation.
        Private Sub document_mouseRightButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)


            Dim clickPoint As Point = Mouse.GetPosition(Me)

            ' Animate to the target point.
            xAnimation.To = clickPoint.X
            yAnimation.To = clickPoint.Y
            myStoryboard.Begin(Me, HandoffBehavior.Compose)


        End Sub





    End Class
End Namespace

Commenti

Quando si applica un Storyboard, AnimationTimelineo AnimationClock a una proprietà utilizzando l'ComposeHandoffBehavior, tutti gli oggetti Clock precedentemente associati a tale proprietà continuano a utilizzare le risorse di sistema; il sistema di temporizzazione non rimuove automaticamente questi orologi.

Per evitare problemi di prestazioni quando si applica un numero elevato di orologi usando Compose, è necessario rimuovere i clock di composizione dalla proprietà animata dopo il completamento. Esistono diversi modi per rimuovere un orologio.

• Per rimuovere tutti gli orologi da una proprietà, utilizzare il metodo ApplyAnimationClock(DependencyProperty, AnimationClock) o BeginAnimation(DependencyProperty, AnimationTimeline) dell'oggetto animato. Specificare la proprietà animata come primo parametro e null come seconda. In questo modo tutti gli orologi di animazione vengono rimossi dalla proprietà .

• Per rimuovere un AnimationClock specifico da un elenco di orologi, utilizzare la proprietà Controller del AnimationClock per recuperare un ClockController, quindi chiamare il metodo Remove del ClockController. Questa operazione viene in genere eseguita nel gestore eventi Completed per un orologio. Si noti che solo gli orologi radice possono essere controllati da un ClockController; la proprietà Controller di un orologio figlio restituisce null. Si noti anche che l'evento Completed non viene chiamato se la durata effettiva dell'orologio è per sempre. In tal caso, l'utente deve determinare quando chiamare Remove.

Si tratta principalmente di un problema per le animazioni sugli oggetti che hanno una durata prolungata. Quando un oggetto viene sottoposto a Garbage Collection, anche i relativi orologi vengono disconnessi e sottoposto a Garbage Collection.

Per altre informazioni sugli oggetti clock, vedere Animation and Timing System Overview.

public:
 void Begin(System::Windows::FrameworkContentElement ^ containingObject, bool isControllable);

public void Begin (System.Windows.FrameworkContentElement containingObject, bool isControllable);

member this.Begin : System.Windows.FrameworkContentElement * bool -> unit

Public Sub Begin (containingObject As FrameworkContentElement, isControllable As Boolean)

Parametri

Esempio

Nell'esempio seguente viene usato uno storyboard controllabile per animare un TextEffect. Il TextEffect è contenuto nell'ambito del nome di un FrameworkContentElement.

/*
    This example shows how to control
    a storyboard after it has started.

*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Documents;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
    public class FrameworkContentElementControlStoryboardExample : FlowDocument
    {
    
        private Storyboard myStoryboard;
        
        public FrameworkContentElementControlStoryboardExample()
        {
        
            // Create a name scope for the document.
            NameScope.SetNameScope(this, new NameScope());        
            this.Background = Brushes.White;
            
            // Create a run of text.
            Run theText = new Run( 
                "Lorem ipsum dolor sit amet, consectetuer adipiscing elit." + 
                "Ut non lacus. Nullam a ligula id leo adipiscing ornare." +
                " Duis mattis. ");   
                
            // Create a TextEffect
            TextEffect animatedSpecialEffect = new TextEffect();
            animatedSpecialEffect.Foreground = Brushes.OrangeRed;
            animatedSpecialEffect.PositionStart = 0;
            animatedSpecialEffect.PositionCount = 0;
            
            // Assign the TextEffect a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations            
            this.RegisterName("animatedSpecialEffect", animatedSpecialEffect);  
            
            // Apply the text effect to the run.
            theText.TextEffects = new TextEffectCollection();
            theText.TextEffects.Add(animatedSpecialEffect);
            
            // Create a paragraph to contain the run.
            Paragraph animatedParagraph = new Paragraph(theText);
            animatedParagraph.Background = Brushes.LightGray;
            animatedParagraph.Padding = new Thickness(20);
   
            this.Blocks.Add(animatedParagraph);            
            BlockUIContainer controlsContainer = new BlockUIContainer();                
            
            //
            // Create an animation and a storyboard to animate the
            // text effect.
            //
            Int32Animation countAnimation = 
                new Int32Animation(0, 127, TimeSpan.FromSeconds(10)); 
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect");
            Storyboard.SetTargetProperty(countAnimation, 
                new PropertyPath(TextEffect.PositionCountProperty));
            myStoryboard = new Storyboard();
            myStoryboard.Children.Add(countAnimation);
            
            //
            // Create some buttons to control the storyboard
            // and a panel to contain them.
            //
            StackPanel buttonPanel = new StackPanel();
            buttonPanel.Orientation = Orientation.Vertical;
            Button beginButton = new Button();
            beginButton.Content = "Begin";
            beginButton.Click += new RoutedEventHandler(beginButton_Clicked);            
            buttonPanel.Children.Add(beginButton);
            Button pauseButton = new Button();
            pauseButton.Content = "Pause";
            pauseButton.Click +=new RoutedEventHandler(pauseButton_Clicked);
            buttonPanel.Children.Add(pauseButton);
            Button resumeButton = new Button();
            resumeButton.Content = "Resume";
            resumeButton.Click +=new RoutedEventHandler(resumeButton_Clicked);
            buttonPanel.Children.Add(resumeButton);
            Button skipToFillButton = new Button();
            skipToFillButton.Content = "Skip to Fill";
            skipToFillButton.Click +=new RoutedEventHandler(skipToFillButton_Clicked);
            buttonPanel.Children.Add(skipToFillButton);
            Button setSpeedRatioButton = new Button();
            setSpeedRatioButton.Content = "Triple Speed";
            setSpeedRatioButton.Click +=new RoutedEventHandler(setSpeedRatioButton_Clicked);
            buttonPanel.Children.Add(setSpeedRatioButton);
            Button stopButton = new Button();
            stopButton.Content = "Stop";
            stopButton.Click +=new RoutedEventHandler(stopButton_Clicked);
            buttonPanel.Children.Add(stopButton);
            Button removeButton = new Button();
            removeButton.Content = "Remove";
            removeButton.Click +=new RoutedEventHandler(removeButton_Clicked);
            buttonPanel.Children.Add(removeButton); 
   
            controlsContainer.Child = buttonPanel; 
            this.Blocks.Add(controlsContainer);
        }
        
        // Begins the storyboard.
        private void beginButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Specifying "true" as the second Begin parameter
            // makes this storyboard controllable.
            myStoryboard.Begin(this, true);          
        }
        
        // Pauses the storyboard.
        private void pauseButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Pause(this);          
        }
        
        // Resumes the storyboard.
        private void resumeButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Resume(this);          
        }     
        
        // Advances the storyboard to its fill period.
        private void skipToFillButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.SkipToFill(this);          
        } 
        
        // Updates the storyboard's speed.
        private void setSpeedRatioButton_Clicked(object sender, RoutedEventArgs args)
        {
            // Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(this, 3);          
        }           
        
        // Stops the storyboard.
        private void stopButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Stop(this);          
        }     
        
        // Removes the storyboard.
        private void removeButton_Clicked(object sender, RoutedEventArgs args)
        {
             myStoryboard.Remove(this);          
        }           
    }
}

'
'    This example shows how to control
'    a storyboard after it has started.
'
'


Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Documents


Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
    Public Class FrameworkContentElementControlStoryboardExample
        Inherits FlowDocument

        Private myStoryboard As Storyboard

        Public Sub New()

            ' Create a name scope for the document.
            NameScope.SetNameScope(Me, New NameScope())
            Me.Background = Brushes.White

            ' Create a run of text.
            Dim theText As New Run("Lorem ipsum dolor sit amet, consectetuer adipiscing elit." & "Ut non lacus. Nullam a ligula id leo adipiscing ornare." & " Duis mattis. ")

            ' Create a TextEffect
            Dim animatedSpecialEffect As New TextEffect()
            animatedSpecialEffect.Foreground = Brushes.OrangeRed
            animatedSpecialEffect.PositionStart = 0
            animatedSpecialEffect.PositionCount = 0

            ' Assign the TextEffect a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations            
            Me.RegisterName("animatedSpecialEffect", animatedSpecialEffect)

            ' Apply the text effect to the run.
            theText.TextEffects = New TextEffectCollection()
            theText.TextEffects.Add(animatedSpecialEffect)

            ' Create a paragraph to contain the run.
            Dim animatedParagraph As New Paragraph(theText)
            animatedParagraph.Background = Brushes.LightGray
            animatedParagraph.Padding = New Thickness(20)

            Me.Blocks.Add(animatedParagraph)
            Dim controlsContainer As New BlockUIContainer()

            '
            ' Create an animation and a storyboard to animate the
            ' text effect.
            '
            Dim countAnimation As New Int32Animation(0, 127, TimeSpan.FromSeconds(10))
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect")
            Storyboard.SetTargetProperty(countAnimation, New PropertyPath(TextEffect.PositionCountProperty))
            myStoryboard = New Storyboard()
            myStoryboard.Children.Add(countAnimation)

            '
            ' Create some buttons to control the storyboard
            ' and a panel to contain them.
            '
            Dim buttonPanel As New StackPanel()
            buttonPanel.Orientation = Orientation.Vertical
            Dim beginButton As New Button()
            beginButton.Content = "Begin"
            AddHandler beginButton.Click, AddressOf beginButton_Clicked
            buttonPanel.Children.Add(beginButton)
            Dim pauseButton As New Button()
            pauseButton.Content = "Pause"
            AddHandler pauseButton.Click, AddressOf pauseButton_Clicked
            buttonPanel.Children.Add(pauseButton)
            Dim resumeButton As New Button()
            resumeButton.Content = "Resume"
            AddHandler resumeButton.Click, AddressOf resumeButton_Clicked
            buttonPanel.Children.Add(resumeButton)
            Dim skipToFillButton As New Button()
            skipToFillButton.Content = "Skip to Fill"
            AddHandler skipToFillButton.Click, AddressOf skipToFillButton_Clicked
            buttonPanel.Children.Add(skipToFillButton)
            Dim setSpeedRatioButton As New Button()
            setSpeedRatioButton.Content = "Triple Speed"
            AddHandler setSpeedRatioButton.Click, AddressOf setSpeedRatioButton_Clicked
            buttonPanel.Children.Add(setSpeedRatioButton)
            Dim stopButton As New Button()
            stopButton.Content = "Stop"
            AddHandler stopButton.Click, AddressOf stopButton_Clicked
            buttonPanel.Children.Add(stopButton)
            Dim removeButton As New Button()
            removeButton.Content = "Remove"
            AddHandler removeButton.Click, AddressOf removeButton_Clicked
            buttonPanel.Children.Add(removeButton)

            controlsContainer.Child = buttonPanel
            Me.Blocks.Add(controlsContainer)

        End Sub

        ' Begins the storyboard.
        Private Sub beginButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Specifying "true" as the second Begin parameter
            ' makes this storyboard controllable.
            myStoryboard.Begin(Me, True)

        End Sub

        ' Pauses the storyboard.
        Private Sub pauseButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Pause(Me)

        End Sub

        ' Resumes the storyboard.
        Private Sub resumeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Resume(Me)

        End Sub

        ' Advances the storyboard to its fill period.
        Private Sub skipToFillButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.SkipToFill(Me)

        End Sub

        ' Updates the storyboard's speed.
        Private Sub setSpeedRatioButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
            ' Makes the storyboard progress three times as fast as normal.
            myStoryboard.SetSpeedRatio(Me, 3)

        End Sub

        ' Stops the storyboard.
        Private Sub stopButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Stop(Me)

        End Sub

        ' Removes the storyboard.
        Private Sub removeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
             myStoryboard.Remove(Me)

        End Sub

    End Class
End Namespace

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Per controllare in modo interattivo questo storyboard, è necessario specificare lo stesso containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject);

public void Begin (System.Windows.FrameworkElement containingObject);

member this.Begin : System.Windows.FrameworkElement -> unit

Public Sub Begin (containingObject As FrameworkElement)

Parametri

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Gli storyboard avviati con questo metodo non possono essere sospesi, ripresi o controllati in modo interattivo dopo l'avvio. Per rendere controllabile uno storyboard, usare il metodo Begin(FrameworkElement, Boolean) o Begin(FrameworkElement, HandoffBehavior, Boolean).

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

public:
 void Begin(System::Windows::FrameworkContentElement ^ containingObject);

public void Begin (System.Windows.FrameworkContentElement containingObject);

member this.Begin : System.Windows.FrameworkContentElement -> unit

Public Sub Begin (containingObject As FrameworkContentElement)

Parametri

Esempio

Nell'esempio seguente viene usato uno storyboard per animare un TextEffect. Il TextEffect è contenuto nell'ambito del nome di un FrameworkContentElement.

/*
    This example shows how to animate
    a FrameworkContentElement with a storyboard.

*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Documents;

namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
    public class FrameworkContentElementStoryboardExample : FlowDocument
    {
    
        private Storyboard myStoryboard;
        
        public FrameworkContentElementStoryboardExample()
        {
        
            // Create a name scope for the document.
            NameScope.SetNameScope(this, new NameScope());        
            this.Background = Brushes.White;
            
            // Create a run of text.
            Run theText = new Run( 
                "Lorem ipsum dolor sit amet, consectetuer adipiscing elit." + 
                "Ut non lacus. Nullam a ligula id leo adipiscing ornare." +
                " Duis mattis. ");   
                
            // Create a TextEffect
            TextEffect animatedSpecialEffect = new TextEffect();
            animatedSpecialEffect.Foreground = Brushes.OrangeRed;
            animatedSpecialEffect.PositionStart = 0;
            animatedSpecialEffect.PositionCount = 0;
            
            // Assign the TextEffect a name by 
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations            
            this.RegisterName("animatedSpecialEffect", animatedSpecialEffect);  
            
            // Apply the text effect to the run.
            theText.TextEffects = new TextEffectCollection();
            theText.TextEffects.Add(animatedSpecialEffect);
            
            // Create a paragraph to contain the run.
            Paragraph animatedParagraph = new Paragraph(theText);
            animatedParagraph.Background = Brushes.LightGray;
            animatedParagraph.Padding = new Thickness(20);
   
            this.Blocks.Add(animatedParagraph);            
            BlockUIContainer controlsContainer = new BlockUIContainer();                
            
            //
            // Create an animation and a storyboard to animate the
            // text effect.
            //
            Int32Animation countAnimation = 
                new Int32Animation(0, 127, TimeSpan.FromSeconds(10));            
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect");
            Storyboard.SetTargetProperty(countAnimation, 
                new PropertyPath(TextEffect.PositionCountProperty));
            myStoryboard = new Storyboard();
            myStoryboard.Children.Add(countAnimation);
            
            //
            // Create a button to start the storyboard.
            //
            Button beginButton = new Button();
            beginButton.Content = "Begin";
            beginButton.Click += new RoutedEventHandler(beginButton_Clicked);            
 
            controlsContainer.Child = beginButton; 
            this.Blocks.Add(controlsContainer);
        }
        
        // Begins the storyboard.
        private void beginButton_Clicked(object sender, RoutedEventArgs args)
        {
        
            myStoryboard.Begin(this);                  
        }
    }
}

'
'    This example shows how to animate
'    a FrameworkContentElement with a storyboard.
'
'


Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Documents


Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
    Public Class FrameworkContentElementStoryboardExample
        Inherits FlowDocument

        Private myStoryboard As Storyboard

        Public Sub New()

            ' Create a name scope for the document.
            NameScope.SetNameScope(Me, New NameScope())
            Me.Background = Brushes.White

            ' Create a run of text.
            Dim theText As New Run("Lorem ipsum dolor sit amet, consectetuer adipiscing elit." & "Ut non lacus. Nullam a ligula id leo adipiscing ornare." & " Duis mattis. ")

            ' Create a TextEffect
            Dim animatedSpecialEffect As New TextEffect()
            animatedSpecialEffect.Foreground = Brushes.OrangeRed
            animatedSpecialEffect.PositionStart = 0
            animatedSpecialEffect.PositionCount = 0

            ' Assign the TextEffect a name by 
            ' registering it with the page, so that
            ' it can be targeted by storyboard
            ' animations            
            Me.RegisterName("animatedSpecialEffect", animatedSpecialEffect)

            ' Apply the text effect to the run.
            theText.TextEffects = New TextEffectCollection()
            theText.TextEffects.Add(animatedSpecialEffect)

            ' Create a paragraph to contain the run.
            Dim animatedParagraph As New Paragraph(theText)
            animatedParagraph.Background = Brushes.LightGray
            animatedParagraph.Padding = New Thickness(20)

            Me.Blocks.Add(animatedParagraph)
            Dim controlsContainer As New BlockUIContainer()

            '
            ' Create an animation and a storyboard to animate the
            ' text effect.
            '
            Dim countAnimation As New Int32Animation(0, 127, TimeSpan.FromSeconds(10))
            Storyboard.SetTargetName(countAnimation, "animatedSpecialEffect")
            Storyboard.SetTargetProperty(countAnimation, New PropertyPath(TextEffect.PositionCountProperty))
            myStoryboard = New Storyboard()
            myStoryboard.Children.Add(countAnimation)

            '
            ' Create a button to start the storyboard.
            '
            Dim beginButton As New Button()
            beginButton.Content = "Begin"
            AddHandler beginButton.Click, AddressOf beginButton_Clicked

            controlsContainer.Child = beginButton
            Me.Blocks.Add(controlsContainer)

        End Sub

        ' Begins the storyboard.
        Private Sub beginButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)

            myStoryboard.Begin(Me)
        End Sub



    End Class
End Namespace

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Gli storyboard avviati con questo metodo non possono essere sospesi, ripresi o controllati in modo interattivo dopo l'avvio. Per rendere controllabile uno storyboard, usare il metodo Begin o Begin.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.

public:
 void Begin();

public void Begin ();

member this.Begin : unit -> unit

Public Sub Begin ()

public:
 void Begin(System::Windows::FrameworkElement ^ containingObject, bool isControllable);

public void Begin (System.Windows.FrameworkElement containingObject, bool isControllable);

member this.Begin : System.Windows.FrameworkElement * bool -> unit

Public Sub Begin (containingObject As FrameworkElement, isControllable As Boolean)

Parametri

Commenti

Se le proprietà di destinazione sono già animate, vengono sostituite usando il comportamento di handoff SnapshotAndReplace.

Per controllare in modo interattivo questo storyboard, è necessario usare lo stesso parametro containingObject quando si chiamano i metodi interattivi usati per iniziare lo storyboard

Quando questo metodo viene chiamato, vengono creati Clock oggetti per lo storyboard e le sequenze temporali in esso contenute. Questi orologi vengono archiviati con containingObject.

L'inizio di uno storyboard attiva gli eventi CurrentStateInvalidated e CurrentGlobalSpeedInvalidated.