/// <summary>
/// Detects which dependendy properties are out of sync with the Media Engine State properties
/// </summary>
/// <param name="m">The m.</param>
/// <returns>A dictionary of dependency properties to synchonize along with the engine values.</returns>
public static Dictionary <DependencyProperty, object> DetectDependencyPropertyChanges(this MediaElement m)
{
var result = new Dictionary <DependencyProperty, object>(PropertyMaxCount);
object engineValue = null; // The current value of the media engine state property
object propertyValue = null; // The current value of the dependency property
foreach (var targetProperty in MediaElementDependencyProperties)
{
engineValue = MediaEngineStateProperties[targetProperty.Key].GetValue(m.MediaCore.State);
propertyValue = m.GetValue(targetProperty.Value);
if (targetProperty.Value.PropertyType != MediaEngineStateProperties[targetProperty.Key].PropertyType)
{
if (targetProperty.Value.PropertyType.IsEnum)
{
engineValue = Enum.ToObject(targetProperty.Value.PropertyType, engineValue);
}
else
{
engineValue = Convert.ChangeType(engineValue, targetProperty.Value.PropertyType);
}
}
if (Equals(engineValue, propertyValue) == false)
{
result[targetProperty.Value] = engineValue;
}
}
return(result);
}
public void CheckReadOnlyProperties()
{
MediaElement m = new MediaElement();
Assert.AreEqual(0, (int)m.GetValue(MediaElement.AudioStreamCountProperty), "Get/AudioStreamCountProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.AudioStreamCountProperty, 1);
});
Assert.AreEqual(0, m.AudioStreamCount, "AudioStreamCount");
Assert.AreEqual(0.0, (double)m.GetValue(MediaElement.BufferingProgressProperty), "Get/BufferingProgressProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.BufferingProgressProperty, 1.0);
});
Assert.AreEqual(0.0, m.BufferingProgress, "BufferingProgress");
Assert.IsFalse((bool)m.GetValue(MediaElement.CanPauseProperty), "Get/CanPauseProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.CanPauseProperty, true);
});
Assert.IsFalse(m.CanPause, "CanPause");
Assert.IsFalse((bool)m.GetValue(MediaElement.CanSeekProperty), "Get/CanSeekProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.CanSeekProperty, true);
});
Assert.IsFalse(m.CanSeek, "CanSeek");
Assert.AreEqual(MediaElementState.Closed, (MediaElementState)m.GetValue(MediaElement.CurrentStateProperty), "Get/CurrentState");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.CurrentStateProperty, MediaElementState.Stopped);
});
Assert.AreEqual(MediaElementState.Closed, m.CurrentState, "CurrentState");
Assert.AreEqual(0.0, (double)m.GetValue(MediaElement.DownloadProgressOffsetProperty), "Get/DownloadProgressOffsetProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.DownloadProgressOffsetProperty, 1.0);
});
Assert.AreEqual(0.0, m.DownloadProgressOffset, "DownloadProgressOffset");
Assert.AreEqual(0.0, (double)m.GetValue(MediaElement.DroppedFramesPerSecondProperty), "Get/DroppedFramesPerSecondProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.DroppedFramesPerSecondProperty, 1.0);
});
Assert.AreEqual(0.0, m.DroppedFramesPerSecond, "DroppedFramesPerSecond");
Assert.AreEqual(0, ((Duration)m.GetValue(MediaElement.NaturalDurationProperty)).TimeSpan.Ticks, "Get/NaturalDurationProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.NaturalDurationProperty, Duration.Forever);
});
Assert.AreEqual(0.0, m.NaturalDuration.TimeSpan.Ticks, "NaturalDuration");
Assert.AreEqual(0, (int)m.GetValue(MediaElement.NaturalVideoHeightProperty), "Get/NaturalVideoHeightProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.NaturalVideoHeightProperty, 1);
});
Assert.AreEqual(0, m.NaturalVideoHeight, "NaturalVideoHeight");
Assert.AreEqual(0, (int)m.GetValue(MediaElement.NaturalVideoWidthProperty), "Get/NaturalVideoWidthProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.NaturalVideoWidthProperty, 1);
});
Assert.AreEqual(0, m.NaturalVideoWidth, "NaturalVideoWidth");
Assert.AreEqual(0.0, (double)m.GetValue(MediaElement.RenderedFramesPerSecondProperty), "Get/RenderedFramesPerSecondProperty");
Assert.Throws <ArgumentException> (delegate {
m.SetValue(MediaElement.RenderedFramesPerSecondProperty, 1.0);
});
Assert.AreEqual(0.0, m.RenderedFramesPerSecond, "RenderedFramesPerSecond");
}