Poznámka
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Tento příklad ukazuje, jak použít Storyboard k animaci vlastností. Pokud chcete animovat vlastnost pomocí příkazu Storyboard, vytvořte animaci pro každou vlastnost, kterou chcete animovat, a vytvořte Storyboard jako kontejner pro tyto animace.
Typ vlastnosti určuje typ animace, která se má použít. Chcete-li například animovat vlastnost, která přebírá Double hodnoty, použijte .DoubleAnimation Připojené vlastnosti TargetName a TargetProperty určují objekt a vlastnost, kam se animace použije.
Chcete-li spustit scénář animace v jazyku XAML (Extensible Application Markup Language), použijte akci BeginStoryboard a EventTrigger. Akce EventTrigger začíná BeginStoryboard , když dojde k události, která je určena jeho RoutedEvent vlastností. Akce BeginStoryboard spustí Storyboard.
Následující příklad používá Storyboard objekty k animaci dvou Button ovládacích prvků. Aby se změnila velikost prvního tlačítka, je jeho Width animován. Pokud chcete změnit barvu druhého tlačítka, použije se vlastnost Color k nastavení SolidColorBrush tlačítka, které je animováno.
Příklad
<!-- StoryboardExample.xaml
Uses storyboards to animate properties. -->
<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
WindowTitle="Animate Properties with Storyboards">
<Border Background="White">
<StackPanel Margin="30" HorizontalAlignment="Left" MinWidth="500">
<TextBlock>Storyboard Animation Example</TextBlock>
<!-- The width of this button is animated. -->
<Button Name="myWidthAnimatedButton"
Height="30" Width="200" HorizontalAlignment="Left">
A Button
<Button.Triggers>
<!-- Animates the width of the first button
from 200 to 300. -->
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="myWidthAnimatedButton"
Storyboard.TargetProperty="Width"
From="200" To="300" Duration="0:0:3" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
<!-- The color of the brush used to paint this button is animated. -->
<Button Height="30" Width="200"
HorizontalAlignment="Left">Another Button
<Button.Background>
<SolidColorBrush x:Name="myAnimatedBrush" Color="Blue" />
</Button.Background>
<Button.Triggers>
<!-- Animates the color of the brush used to paint
the second button from red to blue . -->
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="myAnimatedBrush"
Storyboard.TargetProperty="Color"
From="Red" To="Blue" Duration="0:0:7" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
</StackPanel>
</Border>
</Page>
Poznámka:
I když animace mohou cílit na FrameworkElement objekt, jako je Control nebo Panel, a na Freezable objekt, jako je Brush nebo Transform, pouze prvky rámce mají vlastnost Name. Pokud chcete přiřadit název k objektu typu "Freezable," aby mohl být zacílen animací, použijte direktivu x:Name, jak ukazuje předchozí příklad.
Pokud používáte kód, musíte vytvořit NameScope pro FrameworkElement a zaregistrovat názvy objektů, které se budou animovat pomocí tohoto FrameworkElement. Chcete-li spustit animace v kódu, použijte BeginStoryboard akci s objektem EventTrigger. Volitelně můžete použít obslužnou rutinu události a metodu BeginStoryboard. Následující příklad ukazuje, jak použít metodu Begin .
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
// Uses a storyboard to animate the properties
// of two buttons.
public class StoryboardExample : Page
{
public StoryboardExample()
{
// Create a name scope for the page.
NameScope.SetNameScope(this, new NameScope());
this.WindowTitle = "Animate Properties using Storyboards";
StackPanel myStackPanel = new StackPanel();
myStackPanel.MinWidth = 500;
myStackPanel.Margin = new Thickness(30);
myStackPanel.HorizontalAlignment = HorizontalAlignment.Left;
TextBlock myTextBlock = new TextBlock();
myTextBlock.Text = "Storyboard Animation Example";
myStackPanel.Children.Add(myTextBlock);
//
// Create and animate the first button.
//
// Create a button.
Button myWidthAnimatedButton = new Button();
myWidthAnimatedButton.Height = 30;
myWidthAnimatedButton.Width = 200;
myWidthAnimatedButton.HorizontalAlignment = HorizontalAlignment.Left;
myWidthAnimatedButton.Content = "A Button";
// Set the Name of the button so that it can be referred
// to in the storyboard that's created later.
// The ID doesn't have to match the variable name;
// it can be any unique identifier.
myWidthAnimatedButton.Name = "myWidthAnimatedButton";
// Register the name with the page to which the button belongs.
this.RegisterName(myWidthAnimatedButton.Name, myWidthAnimatedButton);
// Create a DoubleAnimation to animate the width of the button.
DoubleAnimation myDoubleAnimation = new DoubleAnimation();
myDoubleAnimation.From = 200;
myDoubleAnimation.To = 300;
myDoubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(3000));
// Configure the animation to target the button's Width property.
Storyboard.SetTargetName(myDoubleAnimation, myWidthAnimatedButton.Name);
Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Button.WidthProperty));
// Create a storyboard to contain the animation.
Storyboard myWidthAnimatedButtonStoryboard = new Storyboard();
myWidthAnimatedButtonStoryboard.Children.Add(myDoubleAnimation);
// Animate the button width when it's clicked.
myWidthAnimatedButton.Click += delegate(object sender, RoutedEventArgs args)
{
myWidthAnimatedButtonStoryboard.Begin(myWidthAnimatedButton);
};
myStackPanel.Children.Add(myWidthAnimatedButton);
//
// Create and animate the second button.
//
// Create a second button.
Button myColorAnimatedButton = new Button();
myColorAnimatedButton.Height = 30;
myColorAnimatedButton.Width = 200;
myColorAnimatedButton.HorizontalAlignment = HorizontalAlignment.Left;
myColorAnimatedButton.Content = "Another Button";
// Create a SolidColorBrush to paint the button's background.
SolidColorBrush myBackgroundBrush = new SolidColorBrush();
myBackgroundBrush.Color = Colors.Blue;
// Because a Brush isn't a FrameworkElement, it doesn't
// have a Name property to set. Instead, you just
// register a name for the SolidColorBrush with
// the page where it's used.
this.RegisterName("myAnimatedBrush", myBackgroundBrush);
// Use the brush to paint the background of the button.
myColorAnimatedButton.Background = myBackgroundBrush;
// Create a ColorAnimation to animate the button's background.
ColorAnimation myColorAnimation = new ColorAnimation();
myColorAnimation.From = Colors.Red;
myColorAnimation.To = Colors.Blue;
myColorAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(7000));
// Configure the animation to target the brush's Color property.
Storyboard.SetTargetName(myColorAnimation, "myAnimatedBrush");
Storyboard.SetTargetProperty(myColorAnimation, new PropertyPath(SolidColorBrush.ColorProperty));
// Create a storyboard to contain the animation.
Storyboard myColorAnimatedButtonStoryboard = new Storyboard();
myColorAnimatedButtonStoryboard.Children.Add(myColorAnimation);
// Animate the button background color when it's clicked.
myColorAnimatedButton.Click += delegate(object sender, RoutedEventArgs args)
{
myColorAnimatedButtonStoryboard.Begin(myColorAnimatedButton);
};
myStackPanel.Children.Add(myColorAnimatedButton);
this.Content = myStackPanel;
}
}
}
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Namespace SDKSample
' Uses a storyboard to animate the properties
' of two buttons.
Public Class StoryboardExample
Inherits Page
Private Dim WithEvents myWidthAnimatedButton As Button
Private Dim WithEvents myColorAnimatedButton As Button
Private Dim myWidthAnimatedButtonStoryboard As Storyboard
Private Dim myColorAnimatedButtonStoryboard As Storyboard
Public Sub New()
' Create a name scope for the page.
NameScope.SetNameScope(Me, New NameScope())
Me.WindowTitle = "Animate Properties using Storyboards"
Dim myStackPanel As New StackPanel()
myStackPanel.MinWidth = 500
myStackPanel.Margin = New Thickness(30)
myStackPanel.HorizontalAlignment = HorizontalAlignment.Left
Dim myTextBlock As New TextBlock()
myTextBlock.Text = "Storyboard Animation Example"
myStackPanel.Children.Add(myTextBlock)
'
' Create and animate the first button.
'
' Create a button.
myWidthAnimatedButton = New Button()
myWidthAnimatedButton.Height = 30
myWidthAnimatedButton.Width = 200
myWidthAnimatedButton.HorizontalAlignment = HorizontalAlignment.Left
myWidthAnimatedButton.Content = "A Button"
' Set the Name of the button so that it can be referred
' to in the storyboard that's created later.
' The ID doesn't have to match the variable name;
' it can be any unique identifier.
myWidthAnimatedButton.Name = "myWidthAnimatedButton"
' Register the name with the page to which the button belongs.
Me.RegisterName(myWidthAnimatedButton.Name, myWidthAnimatedButton)
' Create a DoubleAnimation to animate the width of the button.
Dim myDoubleAnimation As New DoubleAnimation()
myDoubleAnimation.From = 200
myDoubleAnimation.To = 300
myDoubleAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(3000))
' Configure the animation to target the button's Width property.
Storyboard.SetTargetName(myDoubleAnimation, myWidthAnimatedButton.Name)
Storyboard.SetTargetProperty(myDoubleAnimation, New PropertyPath(Button.WidthProperty))
' Create a storyboard to contain the animation.
myWidthAnimatedButtonStoryboard = New Storyboard()
myWidthAnimatedButtonStoryboard.Children.Add(myDoubleAnimation)
myStackPanel.Children.Add(myWidthAnimatedButton)
'
' Create and animate the second button.
'
' Create a second button.
myColorAnimatedButton = New Button()
myColorAnimatedButton.Height = 30
myColorAnimatedButton.Width = 200
myColorAnimatedButton.HorizontalAlignment = HorizontalAlignment.Left
myColorAnimatedButton.Content = "Another Button"
' Create a SolidColorBrush to paint the button's background.
Dim myBackgroundBrush As New SolidColorBrush()
myBackgroundBrush.Color = Colors.Blue
' Because a Brush isn't a FrameworkElement, it doesn't
' have a Name property to set. Instead, you just
' register a name for the SolidColorBrush with
' the page where it's used.
Me.RegisterName("myAnimatedBrush", myBackgroundBrush)
' Use the brush to paint the background of the button.
myColorAnimatedButton.Background = myBackgroundBrush
' Create a ColorAnimation to animate the button's background.
Dim myColorAnimation As New ColorAnimation()
myColorAnimation.From = Colors.Red
myColorAnimation.To = Colors.Blue
myColorAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(7000))
' Configure the animation to target the brush's Color property.
Storyboard.SetTargetName(myColorAnimation, "myAnimatedBrush")
Storyboard.SetTargetProperty(myColorAnimation, New PropertyPath(SolidColorBrush.ColorProperty))
' Create a storyboard to contain the animation.
myColorAnimatedButtonStoryboard = New Storyboard()
myColorAnimatedButtonStoryboard.Children.Add(myColorAnimation)
myStackPanel.Children.Add(myColorAnimatedButton)
Me.Content = myStackPanel
End Sub
' Start the animation when the button is clicked.
Private Sub myWidthAnimatedButton_Loaded(ByVal sender as object, ByVal args as RoutedEventArgs) Handles myWidthAnimatedButton.Click
myWidthAnimatedButtonStoryboard.Begin(myWidthAnimatedButton)
End Sub
' Start the animation when the button is clicked.
Private Sub myColorAnimatedButton_Loaded(ByVal sender as object, ByVal args as RoutedEventArgs) Handles myColorAnimatedButton.Click
myColorAnimatedButtonStoryboard.Begin(myColorAnimatedButton)
End Sub
End Class
End Namespace
Další informace o animaci a scénářích najdete v tématu Přehled animací.
Pokud používáte kód, nejste omezeni na použití Storyboard objektů, abyste mohli animovat vlastnosti. Další informace a příklady naleznete v tématu Animace vlastnosti bez použití scénáře a animace vlastnosti pomocí AnimationClock.
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