How can I handle events within my custom control?
- by highone
I am not looking to create new events. I need to create a canvas control that optionally fades in or out depending on whether or not the mouse is over it. The code below probably explains what I want to do better than I can.
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));
}
I originally was using this code inside a usercontrol instead of a custom control before I found out that usercontrols don't support content.
