Cómo: Definir un ámbito de nombres
Para animar con Storyboard en código, debe crear un objeto NameScope y registrar los nombres de los objetos de destino para el elemento que posee ese ámbito de nombres. En el ejemplo siguiente se crea un objeto NameScope para myMainPanel. Se agregan dos botones, button1 y button2, al panel, y se registran sus nombres. Se crean varias animaciones y un Storyboard. El método Begin del guión gráfico se utiliza para iniciar las animaciones.
Dado que button1, button2 y myMainPanel comparten el mismo ámbito de nombres, cualquiera de ellos se puede utilizar con el método StoryboardBegin para iniciar las animaciones.
Ejemplo
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
Namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
Public Class ScopeExample
Inherits Page
Private myStoryboard As Storyboard
Private myMainPanel As StackPanel
Private button1, button2 As Button
Public Sub New()
Me.Background = Brushes.White
myMainPanel = New StackPanel()
' Create a name scope for the stackpanel.
NameScope.SetNameScope(myMainPanel, New NameScope())
myMainPanel.Background = Brushes.Orange
button1 = New Button()
button1.Name = "Button1"
' Register button1's name with myMainPanel.
myMainPanel.RegisterName(button1.Name, button1)
button1.Content = "Button 1"
AddHandler button1.Click, AddressOf button1Clicked
myMainPanel.Children.Add(button1)
button2 = New Button()
button2.Name = "Button2"
' Register button2's name with myMainPanel.
myMainPanel.RegisterName(button2.Name, button2)
button2.Content = "Button 2"
AddHandler button2.Click, AddressOf button2Clicked
myMainPanel.Children.Add(button2)
' Create some animations and a storyboard.
Dim button1WidthAnimation As New DoubleAnimation(300, 200, New Duration(TimeSpan.FromSeconds(5)))
Storyboard.SetTargetName(button1WidthAnimation, button1.Name)
Storyboard.SetTargetProperty(button1WidthAnimation, New PropertyPath(Button.WidthProperty))
Dim button2WidthAnimation As New DoubleAnimation(300, 200, New Duration(TimeSpan.FromSeconds(5)))
Storyboard.SetTargetName(button2WidthAnimation, button2.Name)
Storyboard.SetTargetProperty(button2WidthAnimation, New PropertyPath(Button.WidthProperty))
Dim heightAnimationWithoutTarget As New DoubleAnimation(300, 200, New Duration(TimeSpan.FromSeconds(5)))
Storyboard.SetTargetProperty(heightAnimationWithoutTarget, New PropertyPath(FrameworkElement.HeightProperty))
myStoryboard = New Storyboard()
myStoryboard.Children.Add(button1WidthAnimation)
myStoryboard.Children.Add(button2WidthAnimation)
myStoryboard.Children.Add(heightAnimationWithoutTarget)
Me.Content = myMainPanel
End Sub
Private Sub button1Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
' Starts the animations. The animation without a specified
' target name, heightAnimationWithoutTarget, is applied to
' myMainPanel.
myStoryboard.Begin(myMainPanel)
End Sub
Private Sub button2Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
' Starts the animations. The animation without a specified
' target name, heightAnimationWithoutTarget, is applied to
' button2.
myStoryboard.Begin(button2)
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace Microsoft.Samples.Animation.AnimatingWithStoryboards
{
public class ScopeExample : Page
{
private Storyboard myStoryboard;
private StackPanel myMainPanel;
private Button button1, button2;
public ScopeExample()
{
this.Background = Brushes.White;
myMainPanel = new StackPanel();
// Create a name scope for the stackpanel.
NameScope.SetNameScope(myMainPanel, new NameScope());
myMainPanel.Background = Brushes.Orange;
button1 = new Button();
button1.Name = "Button1";
// Register button1's name with myMainPanel.
myMainPanel.RegisterName(button1.Name, button1);
button1.Content = "Button 1";
button1.Click += new RoutedEventHandler(button1Clicked);
myMainPanel.Children.Add(button1);
button2 = new Button();
button2.Name = "Button2";
// Register button2's name with myMainPanel.
myMainPanel.RegisterName(button2.Name, button2);
button2.Content = "Button 2";
button2.Click += new RoutedEventHandler(button2Clicked);
myMainPanel.Children.Add(button2);
// Create some animations and a storyboard.
DoubleAnimation button1WidthAnimation =
new DoubleAnimation(300, 200, new Duration(TimeSpan.FromSeconds(5)));
Storyboard.SetTargetName(button1WidthAnimation, button1.Name);
Storyboard.SetTargetProperty(button1WidthAnimation, new PropertyPath(Button.WidthProperty));
DoubleAnimation button2WidthAnimation =
new DoubleAnimation(300, 200, new Duration(TimeSpan.FromSeconds(5)));
Storyboard.SetTargetName(button2WidthAnimation, button2.Name);
Storyboard.SetTargetProperty(button2WidthAnimation, new PropertyPath(Button.WidthProperty));
DoubleAnimation heightAnimationWithoutTarget =
new DoubleAnimation(300, 200, new Duration(TimeSpan.FromSeconds(5)));
Storyboard.SetTargetProperty(heightAnimationWithoutTarget, new PropertyPath(FrameworkElement.HeightProperty));
myStoryboard = new Storyboard();
myStoryboard.Children.Add(button1WidthAnimation);
myStoryboard.Children.Add(button2WidthAnimation);
myStoryboard.Children.Add(heightAnimationWithoutTarget);
this.Content = myMainPanel;
}
private void button1Clicked(object sender, RoutedEventArgs args)
{
// Starts the animations. The animation without a specified
// target name, heightAnimationWithoutTarget, is applied to
// myMainPanel.
myStoryboard.Begin(myMainPanel);
}
private void button2Clicked(object sender, RoutedEventArgs args)
{
// Starts the animations. The animation without a specified
// target name, heightAnimationWithoutTarget, is applied to
// button2.
myStoryboard.Begin(button2);
}
}
}
Vea también
Tareas
Cómo: Animar una propiedad utilizando un guión gráfico