Практическое руководство. Анимация свойства без раскадровки

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В этом примере показан один из способов применения анимации к свойству без использования Storyboard.

Примечание.

Эта функция недоступна в языке разметки расширяемых приложений (XAML). Сведения о анимации свойства в [! INCLUDEXAML см. в разделе "Анимация свойства с помощью раскадровки".

Чтобы применить локальную анимацию к свойству, следует использовать метод BeginAnimation. Этот метод принимает два параметра: DependencyProperty, указывающий на свойство, подлежащее анимации, и анимацию, применяемую к этому свойству.

Пример

В следующем примере показано, как анимировать ширину и цвет фона для Button.

/*

   This sample demonstrates how to apply non-storyboard animations to a property.
   To animate in markup, you must use storyboards.

*/

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;


namespace Microsoft {
   namespace Samples {
      namespace Animation {
         namespace LocalAnimations {
            // Create the demonstration.
            public ref class LocalAnimationExample : Page {

            public: 
               LocalAnimationExample ()
               {
                  WindowTitle = "Local Animation Example";
                  StackPanel^ myStackPanel = gcnew StackPanel();
                  myStackPanel->Margin = Thickness(20);

                  // Create and set the Button.
                  Button^ aButton = gcnew Button();
                  aButton->Content = "A Button";

                  // Animate the Button's Width.
                  DoubleAnimation^ myDoubleAnimation = gcnew DoubleAnimation();
                  myDoubleAnimation->From = 75;
                  myDoubleAnimation->To = 300;
                  myDoubleAnimation->Duration = Duration(TimeSpan::FromSeconds(5));
                  myDoubleAnimation->AutoReverse = true;
                  myDoubleAnimation->RepeatBehavior = RepeatBehavior::Forever;

                  // Apply the animation to the button's Width property.
                  aButton->BeginAnimation(Button::WidthProperty, myDoubleAnimation);

                  // Create and animate a Brush to set the button's Background.
                  SolidColorBrush^ myBrush = gcnew SolidColorBrush();
                  myBrush->Color = Colors::Blue;

                  ColorAnimation^ myColorAnimation = gcnew ColorAnimation();
                  myColorAnimation->From = Colors::Blue;
                  myColorAnimation->To = Colors::Red;
                  myColorAnimation->Duration = Duration(TimeSpan::FromMilliseconds(7000));
                  myColorAnimation->AutoReverse = true;
                  myColorAnimation->RepeatBehavior = RepeatBehavior::Forever;

                  // Apply the animation to the brush's Color property.
                  myBrush->BeginAnimation(SolidColorBrush::ColorProperty, myColorAnimation);
                  aButton->Background = myBrush;

                  // Add the Button to the panel.
                  myStackPanel->Children->Add(aButton);
                  this->Content = myStackPanel;
               };
            };
         }
      }
   }
}

/*

   This sample demonstrates how to apply non-storyboard animations to a property.
   To animate in markup, you must use storyboards.

*/

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;

namespace Microsoft.Samples.Animation.LocalAnimations
{

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

        public LocalAnimationExample()
        {

            WindowTitle = "Local Animation Example";
            StackPanel myStackPanel = new StackPanel();
            myStackPanel.Margin = new Thickness(20);

            // Create and set the Button.
            Button aButton = new Button();
            aButton.Content = "A Button";

            // Animate the Button's Width.
            DoubleAnimation myDoubleAnimation = new DoubleAnimation();
            myDoubleAnimation.From = 75;
            myDoubleAnimation.To = 300;
            myDoubleAnimation.Duration =  new Duration(TimeSpan.FromSeconds(5));
            myDoubleAnimation.AutoReverse = true;
            myDoubleAnimation.RepeatBehavior = RepeatBehavior.Forever;

            // Apply the animation to the button's Width property.
            aButton.BeginAnimation(Button.WidthProperty, myDoubleAnimation);

            // Create and animate a Brush to set the button's Background.
            SolidColorBrush myBrush = new SolidColorBrush();
            myBrush.Color = Colors.Blue;

            ColorAnimation myColorAnimation = new ColorAnimation();
            myColorAnimation.From = Colors.Blue;
            myColorAnimation.To = Colors.Red;
            myColorAnimation.Duration =  new Duration(TimeSpan.FromMilliseconds(7000));
            myColorAnimation.AutoReverse = true;
            myColorAnimation.RepeatBehavior = RepeatBehavior.Forever;

            // Apply the animation to the brush's Color property.
            myBrush.BeginAnimation(SolidColorBrush.ColorProperty, myColorAnimation);
            aButton.Background = myBrush;

            // Add the Button to the panel.
            myStackPanel.Children.Add(aButton);
            this.Content = myStackPanel;
        }
    }
}

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''This sample demonstrates how to apply non-storyboard animations to a property.
'''To animate in markup, you must use storyboards.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

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

Namespace Microsoft.Samples.Animation.LocalAnimations

    ' Create the demonstration.
    Public Class LocalAnimationExample
        Inherits Page

        Public Sub New()

            WindowTitle = "Animate Property Example"
            Dim myStackPanel As New StackPanel()
            myStackPanel.Margin = New Thickness(20)

            ' Create and set the Button.
            Dim aButton As New Button()
            aButton.Content = "A Button"

            ' Animate the Button's Width.
            Dim myDoubleAnimation As New DoubleAnimation()
            myDoubleAnimation.From = 75
            myDoubleAnimation.To = 300
            myDoubleAnimation.Duration = New Duration(TimeSpan.FromSeconds(5))
            myDoubleAnimation.AutoReverse = True
            myDoubleAnimation.RepeatBehavior = RepeatBehavior.Forever

            ' Apply the animation to the button's Width property.
            aButton.BeginAnimation(Button.WidthProperty, myDoubleAnimation)

            ' Create and animate a Brush to set the button's Background.
            Dim myBrush As New SolidColorBrush()
            myBrush.Color = Colors.Blue

            Dim myColorAnimation As New ColorAnimation()
            myColorAnimation.From = Colors.Blue
            myColorAnimation.To = Colors.Red
            myColorAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(7000))
            myColorAnimation.AutoReverse = True
            myColorAnimation.RepeatBehavior = RepeatBehavior.Forever

            ' Apply the animation to the brush's Color property.
            myBrush.BeginAnimation(SolidColorBrush.ColorProperty, myColorAnimation)
            aButton.Background = myBrush

            ' Add the Button to the panel.
            myStackPanel.Children.Add(aButton)
            Me.Content = myStackPanel
        End Sub
    End Class
End Namespace

В пространстве имен System.Windows.Media.Animation есть разнообразные классы для анимации различных типов свойств. Дополнительные сведения об анимации свойств см. в разделе Общие сведения об эффектах анимации. Дополнительные сведения о свойствах зависимостей (тип свойств, приведенных в этих примерах) и их функциях см. в разделе Общие сведения о свойствах зависимостей.

Существуют другие способы анимации без использования объектов Storyboard; дополнительные сведения см. в разделе Общие сведения о методах анимации свойств.

См. также