Animatable.BeginAnimation Método

public:
 virtual void BeginAnimation(System::Windows::DependencyProperty ^ dp, System::Windows::Media::Animation::AnimationTimeline ^ animation);

public void BeginAnimation (System.Windows.DependencyProperty dp, System.Windows.Media.Animation.AnimationTimeline animation);

abstract member BeginAnimation : System.Windows.DependencyProperty * System.Windows.Media.Animation.AnimationTimeline -> unit
override this.BeginAnimation : System.Windows.DependencyProperty * System.Windows.Media.Animation.AnimationTimeline -> unit

Public Sub BeginAnimation (dp As DependencyProperty, animation As AnimationTimeline)

Parâmetros

Implementações

Comentários

Se a animação tiver um BeginTime maior que zero, a animação começará depois que esse período tiver decorrido a partir do momento em que o próximo quadro for renderizado.

public:
 virtual void BeginAnimation(System::Windows::DependencyProperty ^ dp, System::Windows::Media::Animation::AnimationTimeline ^ animation, System::Windows::Media::Animation::HandoffBehavior handoffBehavior);

public void BeginAnimation (System.Windows.DependencyProperty dp, System.Windows.Media.Animation.AnimationTimeline animation, System.Windows.Media.Animation.HandoffBehavior handoffBehavior);

abstract member BeginAnimation : System.Windows.DependencyProperty * System.Windows.Media.Animation.AnimationTimeline * System.Windows.Media.Animation.HandoffBehavior -> unit
override this.BeginAnimation : System.Windows.DependencyProperty * System.Windows.Media.Animation.AnimationTimeline * System.Windows.Media.Animation.HandoffBehavior -> unit

Public Sub BeginAnimation (dp As DependencyProperty, animation As AnimationTimeline, handoffBehavior As HandoffBehavior)

Parâmetros

Implementações

Exemplos

O exemplo a seguir mostra como aplicar animações usando configurações de HandoffBehavior diferentes.

/*

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 namespace System;
using namespace System::Windows;
using namespace System::Windows::Navigation;
using namespace System::Windows::Media;
using namespace System::Windows::Media::Animation;
using namespace System::Windows::Shapes;
using namespace System::Windows::Controls;
using namespace System::Windows::Input;

namespace Microsoft {
   namespace Samples {
      namespace Animation {
         namespace LocalAnimations {
            public ref class InteractiveAnimationExample : Page {
            private: 
               TranslateTransform^ interactiveTranslateTransform;
               Border^ containerBorder;
               Ellipse^ interactiveEllipse;

            public: 
               InteractiveAnimationExample () 
               {
                  WindowTitle = "Interactive Animation Example";
                  DockPanel^ myPanel = gcnew DockPanel();
                  myPanel->Margin = Thickness(20.0);

                  containerBorder = gcnew Border();
                  containerBorder->Background = Brushes::White;
                  containerBorder->BorderBrush = Brushes::Black;
                  containerBorder->BorderThickness = Thickness(2.0);
                  containerBorder->VerticalAlignment = System::Windows::VerticalAlignment::Stretch;

                  interactiveEllipse = gcnew Ellipse();
                  interactiveEllipse->Fill = Brushes::Lime;
                  interactiveEllipse->Stroke = Brushes::Black;
                  interactiveEllipse->StrokeThickness = 2.0;
                  interactiveEllipse->Width = 25;
                  interactiveEllipse->Height = 25;
                  interactiveEllipse->HorizontalAlignment = System::Windows::HorizontalAlignment::Left;
                  interactiveEllipse->VerticalAlignment = System::Windows::VerticalAlignment::Top;

                  interactiveTranslateTransform = gcnew TranslateTransform();
                  interactiveEllipse->RenderTransform = interactiveTranslateTransform;

                  containerBorder->MouseLeftButtonDown += 
                     gcnew MouseButtonEventHandler(this, &Microsoft::Samples::Animation::LocalAnimations::InteractiveAnimationExample::border_mouseLeftButtonDown);
                  containerBorder->MouseRightButtonDown += 
                     gcnew MouseButtonEventHandler(this, &Microsoft::Samples::Animation::LocalAnimations::InteractiveAnimationExample::border_mouseRightButtonDown);
                  containerBorder->Child = interactiveEllipse;

                  myPanel->Children->Add(containerBorder);
                  this->Content = myPanel;
               };

            private: 
               // When the user left-clicks, use the 
               // SnapshotAndReplace HandoffBehavior when applying the animation.        
               void border_mouseLeftButtonDown (System::Object^ sender, System::Windows::Input::MouseButtonEventArgs^ e)
               {
                  System::Windows::Point clickPoint = Mouse::GetPosition(containerBorder);

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

                  // Animate to the target point.
                  DoubleAnimation^ xAnimation = gcnew DoubleAnimation(targetPoint.X,
                     Duration(TimeSpan::FromSeconds(4)));
                  interactiveTranslateTransform->BeginAnimation(TranslateTransform::XProperty, xAnimation, HandoffBehavior::SnapshotAndReplace);

                  DoubleAnimation^ yAnimation = gcnew DoubleAnimation(targetPoint.Y,
                     Duration(TimeSpan::FromSeconds(4)));
                  interactiveTranslateTransform->BeginAnimation(TranslateTransform::YProperty, yAnimation, HandoffBehavior::SnapshotAndReplace);

                  // Chage the color of the ellipse.
                  interactiveEllipse->Fill = Brushes::Lime;
               }

            private:
               // When the user right-clicks, use the 
               // Compose HandoffBehavior when applying the animation.
               void border_mouseRightButtonDown (System::Object^ sender, System::Windows::Input::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 = System::Windows::Point();
                  targetPoint.X = clickPoint.X - interactiveEllipse->Width / 2;
                  targetPoint.Y = clickPoint.Y - interactiveEllipse->Height / 2;

                  // Animate to the target point.
                  DoubleAnimation^ xAnimation = gcnew DoubleAnimation(targetPoint.X,
                     Duration(TimeSpan::FromSeconds(4)));
                  interactiveTranslateTransform->BeginAnimation(TranslateTransform::XProperty, xAnimation, HandoffBehavior::Compose);

                  DoubleAnimation^ yAnimation = gcnew DoubleAnimation(targetPoint.Y,
                     Duration(TimeSpan::FromSeconds(4)));

                  // Change the color of the ellipse.
                  interactiveTranslateTransform->BeginAnimation(TranslateTransform::YProperty, yAnimation, HandoffBehavior::Compose);
                  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.

*/

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.LocalAnimations
{

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

        private TranslateTransform interactiveTranslateTransform;   
        private Border containerBorder;
        private Ellipse interactiveEllipse;
        
        public InteractiveAnimationExample()
        {
        
            WindowTitle = "Interactive Animation Example";
            DockPanel myPanel = new DockPanel();
            myPanel.Margin = new Thickness(20.0);            
    
            containerBorder = new Border();
            containerBorder.Background = System.Windows.Media.Brushes.White;
            containerBorder.BorderBrush = System.Windows.Media.Brushes.Black;
            containerBorder.BorderThickness = new Thickness(2.0); 
            containerBorder.VerticalAlignment = VerticalAlignment.Stretch;
            
            interactiveEllipse = new Ellipse();
            interactiveEllipse.Fill = System.Windows.Media.Brushes.Lime;
            interactiveEllipse.Stroke = System.Windows.Media.Brushes.Black;
            interactiveEllipse.StrokeThickness = 2.0;
            interactiveEllipse.Width = 25;
            interactiveEllipse.Height = 25;
            interactiveEllipse.HorizontalAlignment = HorizontalAlignment.Left;
            interactiveEllipse.VerticalAlignment = VerticalAlignment.Top;
            
            interactiveTranslateTransform = new TranslateTransform();
            interactiveEllipse.RenderTransform = 
                interactiveTranslateTransform;
                
            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)
        {
        
            System.Windows.Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            System.Windows.Point targetPoint = new System.Windows.Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;  
            
            // Animate to the target point.
            DoubleAnimation xAnimation = 
                new DoubleAnimation(targetPoint.X, 
                new Duration(TimeSpan.FromSeconds(4)));
            interactiveTranslateTransform.BeginAnimation(
                TranslateTransform.XProperty, xAnimation, HandoffBehavior.SnapshotAndReplace);
                
            DoubleAnimation yAnimation = 
                new DoubleAnimation(targetPoint.Y, 
                new Duration(TimeSpan.FromSeconds(4))); 
            interactiveTranslateTransform.BeginAnimation(
                TranslateTransform.YProperty, yAnimation, HandoffBehavior.SnapshotAndReplace);                

            // Change the color of the ellipse.
            interactiveEllipse.Fill = System.Windows.Media.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.
            System.Windows.Point clickPoint = Mouse.GetPosition(containerBorder);
            
            // Set the target point so the center of the ellipse
            // ends up at the clicked point.
            System.Windows.Point targetPoint = new System.Windows.Point();
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2;
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2;

            // Animate to the target point.
            DoubleAnimation xAnimation = 
                new DoubleAnimation(targetPoint.X, 
                new Duration(TimeSpan.FromSeconds(4)));
            interactiveTranslateTransform.BeginAnimation(
                TranslateTransform.XProperty, xAnimation, HandoffBehavior.Compose);
                
            DoubleAnimation yAnimation = 
                new DoubleAnimation(targetPoint.Y, 
                new Duration(TimeSpan.FromSeconds(4))); 
            interactiveTranslateTransform.BeginAnimation(
                TranslateTransform.YProperty, yAnimation, HandoffBehavior.Compose);   
                
            // Change the color of the ellipse.
            interactiveEllipse.Fill = System.Windows.Media.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.LocalAnimations


    ' Create the demonstration.
    Public Class InteractiveAnimationExample
        Inherits Page
        
        
        Private Dim interactiveTranslateTransform As TranslateTransform  
        Private Dim WithEvents containerBorder As Border 
        Private Dim interactiveEllipse As Ellipse
        
        Public Sub New()
        
            WindowTitle = "Interactive Animation Example"
            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()
            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
            
            interactiveTranslateTransform = new TranslateTransform()
            interactiveEllipse.RenderTransform = _
                interactiveTranslateTransform           
            
            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) _
            Handles containerBorder.MouseLeftButtonDown
     
        
            Dim clickPoint = Mouse.GetPosition(containerBorder)
            
            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New System.Windows.Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2  
            
            ' Animate to the target point.
            Dim xAnimation As _ 
                New DoubleAnimation(targetPoint.X,  _
                New Duration(TimeSpan.FromSeconds(4)))
            interactiveTranslateTransform.BeginAnimation( _
                TranslateTransform.XProperty, xAnimation, HandoffBehavior.SnapshotAndReplace)
                
            Dim yAnimation As _ 
                New DoubleAnimation(targetPoint.Y, _
                New Duration(TimeSpan.FromSeconds(4)))
            interactiveTranslateTransform.BeginAnimation( _
                TranslateTransform.YProperty, yAnimation, 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) _
            Handles containerBorder.MouseRightButtonDown
        
        
            ' Find the point where the use clicked.
            Dim clickPoint = Mouse.GetPosition(containerBorder)
            
            ' Set the target point so the center of the ellipse
            ' ends up at the clicked point.
            Dim targetPoint As New System.Windows.Point()
            targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
            targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2
            
            ' Animate to the target point.
            Dim xAnimation As _
                New DoubleAnimation(targetPoint.X, _
                New Duration(TimeSpan.FromSeconds(4)))
            interactiveTranslateTransform.BeginAnimation( _
                TranslateTransform.XProperty, xAnimation, HandoffBehavior.Compose)
                
            Dim yAnimation As _ 
                New DoubleAnimation(targetPoint.Y, _
                New Duration(TimeSpan.FromSeconds(4))) 
            interactiveTranslateTransform.BeginAnimation( _
                TranslateTransform.YProperty, yAnimation, HandoffBehavior.Compose)   
                
            ' Change the color of the ellipse.
            interactiveEllipse.Fill = Brushes.Orange
            
                    
        End Sub
        
    End Class
 
End Namespace

Comentários

Se a animação tiver um BeginTime maior que zero, a animação começará depois que esse período tiver decorrido a partir do momento em que o próximo quadro for renderizado.

Usando o HandoffBehavior do Compose

Quando você aplica um Storyboard, AnimationTimelineou AnimationClock a uma propriedade usando o ComposeHandoffBehavior, todos os objetos Clock anteriormente associados a essa propriedade continuam a consumir recursos do sistema; o sistema de tempo não removerá esses relógios automaticamente.

Para evitar problemas de desempenho quando você aplica um grande número de relógios usando Compose, remova os relógios de composição da propriedade animada após a conclusão deles. Há várias maneiras de remover um relógio.

• Para remover todos os relógios de uma propriedade, use o método ApplyAnimationClock(DependencyProperty, AnimationClock) ou BeginAnimation(DependencyProperty, AnimationTimeline) do objeto animado. Especifique a propriedade que está sendo animada como o primeiro parâmetro e null como a segunda. Isso removerá todos os relógios de animação da propriedade.

• Para remover um AnimationClock específico de uma lista de relógios, use a propriedade Controller do AnimationClock para recuperar um ClockControllere, em seguida, chame o método Remove do ClockController. Normalmente, isso é feito no manipulador de eventos Completed para um relógio. Observe que somente relógios raiz podem ser controlados por um ClockController; a propriedade Controller de um relógio filho retornará null. Observe também que o evento Completed não será chamado se a duração efetiva do relógio for para sempre. Nesse caso, o usuário precisará determinar quando chamar Remove.

Esse é um problema principalmente para animações em objetos que têm um longo tempo de vida. Quando um objeto é coletado, seus relógios também serão desconectados e o lixo coletado.

Para obter mais informações sobre objetos de relógio, consulte a visão geral do sistema de animação e tempo .