如何處理我的自定義控件中的事件？

我不想創建新的事件。我需要創建一個可選擇淡入或淡出的畫布控件，具體取決於鼠標是否在其上。下面的代碼可能解釋了我想要做的比我能做得更好。如何處理我的自定義控件中的事件？

 private Storyboard fadeInStoryboard; 
    private Storyboard fadeOutStoryboard; 
    public FadingOptionPanel() 
    { 
     InitializeComponent(); 
    } 
    public static readonly DependencyProperty FadeEnabledProperty = 
    DependencyProperty.Register("IsFadeEnabled", typeof(bool), typeof(FadingOptionPanel), new FrameworkPropertyMetadata(true, 
        OnFadeEnabledPropertyChanged, 
        OnCoerceFadeEnabledProperty)); 
    public bool IsFadeEnabled 
    { 
     get 
     { 
      return (bool)GetValue(FadeEnabledProperty); 
     } 
     set 
     { 
      SetValue(FadeEnabledProperty, value); 
     } 
    } 
    private static void OnFadeEnabledPropertyChanged(DependencyObject source, 
    DependencyPropertyChangedEventArgs e) 
    { 

    } 
    private static object OnCoerceFadeEnabledProperty(DependencyObject sender, object data) 
    { 
     if (data.GetType() != typeof(bool)) 
     { 
      data = true; 
     } 
     return data; 
    } 

    private void FadingOptionPanel_MouseEnter(object sender, MouseEventArgs e) 
    { 
     if (IsFadeEnabled) 
     { 
      fadeInStoryboard.Begin(this); 
     } 
    } 
    private void FadingOptionPanel_MouseLeave(object sender, MouseEventArgs e) 
    { 
     if (IsFadeEnabled) 
     { 
      fadeOutStoryboard.Begin(this); 
     } 
    } 
    private void FadingOptionsPanel_Loaded(object sender, RoutedEventArgs e) 
    { 
     //Initialize Fade In Animation 
     DoubleAnimation fadeInDoubleAnimation = new DoubleAnimation(); 
     fadeInDoubleAnimation.From = 0; 
     fadeInDoubleAnimation.To = 1; 
     fadeInDoubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(.5)); 
     fadeInStoryboard = new Storyboard(); 
     fadeInStoryboard.Children.Add(fadeInDoubleAnimation); 
     Storyboard.SetTargetName(fadeInDoubleAnimation, this.Name); 
     Storyboard.SetTargetProperty(fadeInDoubleAnimation, new PropertyPath(Canvas.OpacityProperty)); 

     //Initialize Fade Out Animation 
     DoubleAnimation fadeOutDoubleAnimation = new DoubleAnimation(); 
     fadeOutDoubleAnimation.From = 1; 
     fadeOutDoubleAnimation.To = 0; 
     fadeOutDoubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(.2)); 
     fadeOutStoryboard = new Storyboard(); 
     fadeOutStoryboard.Children.Add(fadeOutDoubleAnimation); 
     Storyboard.SetTargetName(fadeOutDoubleAnimation, this.Name); 
     Storyboard.SetTargetProperty(fadeOutDoubleAnimation, new PropertyPath(Canvas.OpacityProperty)); 
    }

我原本是使用用戶控件，而不是一個自定義的控件中此代碼之前，我發現用戶控件不支持的內容。

來源

2010-03-20 Justin

一種方法是覆蓋相應的OnXxx方法。例如：

protected override void OnMouseEnter(MouseEventArgs e) 
{ 
    base.OnMouseEnter(e); 
    if (IsFadeEnabled) 
    { 
    fadeInStoryboard.Begin(this); 
    } 
}

您還可以在構造函數中添加事件訂閱：

public FadingOptionPanel() 
{ 
    this.MouseEnter += FadingOptionPanel_MouseEnter; 
}

注意，對於一個事件運行的腳本，可以常無代碼隱藏做到這一點通過使用EventTriggers - 但我不確定是否可以採用基於EventTrigger的方法來尊重您的IsFadeEnabled屬性。

來源

2010-03-20 22:50:57 itowlson

謝謝。但是，我收到一個錯誤「'''名稱不能在'Minimalistic_Writer.FadingCanvas'的名稱範圍中找到。」在「fadeInStoryboard.Begin（this）;」 – Justin 2010-03-20 23:43:58

我的猜測是，在你的Loaded處理程序中，this.Name返回null。嘗試設置Target屬性而不是TargetName，例如'Storyboard.Target = this;'。 – itowlson 2010-03-21 00:26:43

非常感謝！ – Justin 2010-03-21 00:49:56

如何處理我的自定義控件中的事件？

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