/// <summary>
/// Handles changes to the FadeInOnLoaded property.
/// </summary>
/// <param name="d">
/// The <see cref="DependencyObject"/> on which
/// the property has changed value.
/// </param>
/// <param name="e">
/// Event data that is issued by any event that
/// tracks changes to the effective value of this property.
/// </param>
private static void OnFadeInOnLoadedChanged(
DependencyObject d, DependencyPropertyChangedEventArgs e)
{
bool oldFadeInOnLoaded = (bool)e.OldValue;
bool newFadeInOnLoaded = (bool)d.GetValue(FadeInOnLoadedProperty);
var image = (Image)d;
if (DesignMode.DesignModeEnabled)
{
return;
}
if (newFadeInOnLoaded)
{
var handler = new FadeInOnLoadedHandler((Image)d);
SetFadeInOnLoadedHandler(d, handler);
#pragma warning disable 4014
image.Dispatcher.RunAsync(
CoreDispatcherPriority.High,
() => image.SetBinding(
SourceProperty,
new Binding
{
Path = new PropertyPath("Source"),
Source = image
}));
#pragma warning restore 4014
}
else
{
var handler = GetFadeInOnLoadedHandler(d);
SetFadeInOnLoadedHandler(d, null);
handler.Detach();
image.SetValue(
ImageExtensions.SourceProperty,
null);
}
}
/// <summary>
/// Handles changes to the FadeInOnLoaded property.
/// </summary>
/// <param name="d">
/// The <see cref="DependencyObject"/> on which
/// the property has changed value.
/// </param>
/// <param name="e">
/// Event data that is issued by any event that
/// tracks changes to the effective value of this property.
/// </param>
private static void OnFadeInOnLoadedChanged(
DependencyObject d, DependencyPropertyChangedEventArgs e)
{
bool oldFadeInOnLoaded = (bool)e.OldValue;
bool newFadeInOnLoaded = (bool)d.GetValue(FadeInOnLoadedProperty);
var image = (Image)d;
if (DesignMode.DesignModeEnabled)
{
return;
}
if (newFadeInOnLoaded)
{
var handler = new FadeInOnLoadedHandler((Image)d);
SetFadeInOnLoadedHandler(d, handler);
#pragma warning disable 4014
image.Dispatcher.RunAsync(
CoreDispatcherPriority.High,
() => image.SetBinding(
SourceProperty,
new Binding
{
Path = new PropertyPath("Source"),
Source = image
}));
#pragma warning restore 4014
}
else
{
var handler = GetFadeInOnLoadedHandler(d);
SetFadeInOnLoadedHandler(d, null);
handler.Detach();
image.SetValue(
ImageExtensions.SourceProperty,
null);
}
}
public static void SetFadeInOnLoadedHandler(DependencyObject d, FadeInOnLoadedHandler value)
{
d.SetValue(FadeInOnLoadedHandlerProperty, value);
}
