如何:在演示图板启动后对其进行控制

此示例演示如何在 Storyboard 启动后使用代码对其进行控制。 若要在 XAML 中控制情节提要,请使用 TriggerTriggerAction 对象。有关示例,请参阅使用事件触发器在情节提要启动后对其进行控制

若要启动情节提要,请使用其 Begin 方法,该方法将情节提要动画分发到它们要进行动画处理的属性,并启动情节提要。

若要使情节提要可控,请使用 Begin 方法并将 true 指定为第二个参数。 然后,可以使用情节提要的交互方法暂停、恢复、查找、停止、加快或减慢情节提要,或将其推进到填充期。 下面是情节提要的交互方法列表:

  • Pause:暂停情节提要。

  • Resume:恢复暂停的情节提要。

  • SetSpeedRatio:设置情节提要的交互速度。

  • Seek:查找指定位置的情节提要。

  • SeekAlignedToLastTick:查找情节提要到指定位置。 与 Seek 方法不同,此操作在下一次时钟周期之前处理。

  • SkipToFill:将情节提要推进到其填充期(如果有)。

  • Stop:停止情节提要。

在下面的示例中,使用多个情节提要方法来以交互方式控制情节提要。

注意

若要查看通过 XAML 使用触发器控制情节提要的示例,请参阅使用事件触发器在启动后控制情节提要

示例

/*
    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;

namespace Microsoft.Samples.Animation.TimingBehaviors
{
    public partial class ControlStoryboardExample : Page
    {

        private Storyboard myStoryboard;

        public ControlStoryboardExample()
        {

            // Create a name scope for the page.
            NameScope.SetNameScope(this, new NameScope());

            this.WindowTitle = "Controlling a Storyboard";
            this.Background = Brushes.White;

            StackPanel myStackPanel = new StackPanel();
            myStackPanel.Margin = new Thickness(20);

            // Create a rectangle.
            Rectangle myRectangle = new Rectangle();
            myRectangle.Width = 100;
            myRectangle.Height = 20;
            myRectangle.Margin = new Thickness(12,0,0,5);
            myRectangle.Fill = new SolidColorBrush(Color.FromArgb(170, 51, 51, 255));
            myRectangle.HorizontalAlignment = HorizontalAlignment.Left;
            myStackPanel.Children.Add(myRectangle);

            // Assign the rectangle a name by
            // registering it with the page, so that
            // it can be targeted by storyboard
            // animations.
            this.RegisterName("myRectangle", myRectangle);

            //
            // Create an animation and a storyboard to animate the
            // rectangle.
            //
            DoubleAnimation myDoubleAnimation =
                new DoubleAnimation(100, 500, new Duration(TimeSpan.FromSeconds(5)));
            Storyboard.SetTargetName(myDoubleAnimation, "myRectangle");
            Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Rectangle.WidthProperty));
            myStoryboard = new Storyboard();
            myStoryboard.Children.Add(myDoubleAnimation);

            //
            // 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);
        }
    }
}
'
'    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


Namespace Microsoft.Samples.Animation.TimingBehaviors
    Partial Public Class ControlStoryboardExample
        Inherits Page

        Private ReadOnly myStoryboard As Storyboard

        Public Sub New()

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

            WindowTitle = "Controlling a Storyboard"
            Background = Brushes.White

            Dim myStackPanel As New StackPanel With {
                .Margin = New Thickness(20)
            }

                ' Create a rectangle.
            Dim myRectangle As New Rectangle With {
                .Width = 100,
                .Height = 20,
                .Margin = New Thickness(12, 0, 0, 5),
                .Fill = New SolidColorBrush(Color.FromArgb(170, 51, 51, 255)),
                .HorizontalAlignment = HorizontalAlignment.Left
            }
            myStackPanel.Children.Add(myRectangle)

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

            '
            ' Create an animation and a storyboard to animate the
            ' rectangle.
            '
            Dim myDoubleAnimation As New DoubleAnimation(100, 500, New Duration(TimeSpan.FromSeconds(5)))
            Storyboard.SetTargetName(myDoubleAnimation, "myRectangle")
            Storyboard.SetTargetProperty(myDoubleAnimation, New PropertyPath(Rectangle.WidthProperty))
            myStoryboard = New Storyboard()
            myStoryboard.Children.Add(myDoubleAnimation)

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

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

        End Sub

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

        End Sub

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

        End Sub

        ' Updates the storyboard's speed.
        Private Sub setSpeedRatioButton_Clicked(sender As Object, 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(sender As Object, args As RoutedEventArgs)
            myStoryboard.Stop(Me)

        End Sub



    End Class
End Namespace

另请参阅