Cómo: Animar una propiedad sin utilizar un guión gráfico

  • Artículo

En este ejemplo se muestra una manera de aplicar una animación a una propiedad sin utilizar un objeto Storyboard.

Nota:

Esta funcionalidad no está disponible en Lenguaje de marcado de aplicaciones extensible (XAML). Para obtener información sobre cómo animar una propiedad en [!INCLUDEXAML, vea Animación de una propiedad mediante un guión gráfico.

Para aplicar una animación local a una propiedad, utilice el método BeginAnimation. Este método adopta dos parámetros: un objeto DependencyProperty que especifica la propiedad que se va a animar, y la animación que se aplicará a esa propiedad.

Ejemplo

En el ejemplo siguiente se muestra cómo animar el ancho y el color de fondo de un 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

Existen diversas clases de animación en el espacio de nombres System.Windows.Media.Animation para animar diferentes tipos de propiedades. Para más información sobre la animación de propiedades, vea Información general sobre animaciones. Para más información sobre las propiedades de dependencia (el tipo de propiedades que se muestran en estos ejemplos) y sus características, vea Información general sobre las propiedades de dependencia.

Hay otras maneras de animar sin utilizar objetos Storyboard; para obtener más información, vea Información general sobre técnicas de animación de propiedades.

Vea también