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using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace VideoPlayer
{
// For best full-screen video performance, set EnableGPUAcceleration="true" on the plug-in.
// If hosting Silverlight from .aspx, add EnableGPUAcceleration="true" to the
// <asp:Silverlight> element. If hosting Silverlight from .html, add
// <param name="enableGPUAcceleration" value="true" /> under the <object> tag.
public partial class MainPage : UserControl
{
// mediaElement.Position updates TimelineSlider.Value, and
// updating TimelineSlider.Value updates mediaElement.Position,
// this variable helps us break the infinite loop
private bool duringTickEvent = false;
private bool playVideoWhenSliderDragIsOver = false;
public MainPage()
{
InitializeComponent();
//mediaElement.Source = new Uri("http://www.shoutcast.com/shoutcast_player?stationid=7806&Genre=Electronic&ContentFlag=1");
mediaElement.Source = new Uri("file:///D:/Test/countdown.wmv");
//mit Datei:
//mediaElement.Source = new Uri("file:///D:/Test/countdown.wmv");
//http://www.shoutcast.com/shoutcast_player?stationid=7806&Genre=Electronic&ContentFlag=1
//
CompositionTarget.Rendering += new EventHandler(CompositionTarget_Rendering);
Application.Current.Host.Content.FullScreenChanged += new EventHandler(Content_FullScreenChanged);
}
private void MediaElement_MediaOpened(object sender, RoutedEventArgs e)
{
TimeSpan duration = mediaElement.NaturalDuration.TimeSpan;
totalTimeTextBlock.Text = TimeSpanToString(duration);
UpdateVideoSize();
}
#region play button
private void BigPlayButton_Click(object sender, RoutedEventArgs e)
{
playPauseButton.IsChecked = true;
PlayPauseButton_Click(sender, e);
}
private void PlayPauseButton_Click(object sender, RoutedEventArgs e)
{
bigPlayButton.Visibility = Visibility.Collapsed;
// this will be the toggle button state after the click has been processed
if (playPauseButton.IsChecked == true)
mediaElement.Play();
else
mediaElement.Pause();
}
#endregion
#region timelineSlider
private void Seek(double percentComplete)
{
if (duringTickEvent)
throw new Exception("Can't call Seek() now, you'll get an infinite loop");
TimeSpan duration = mediaElement.NaturalDuration.TimeSpan;
int newPosition = (int)(duration.TotalSeconds * percentComplete);
mediaElement.Position = new TimeSpan(0, 0, newPosition);
// let the next CompositionTarget.Rendering take care of updating the text blocks
}
private Slider GetSliderParent(object sender)
{
FrameworkElement element = (FrameworkElement)sender;
do
{
element = (FrameworkElement)VisualTreeHelper.GetParent(element);
} while (!(element is Slider));
return (Slider)element;
}
private void LeftTrack_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
FrameworkElement lefttrack = (sender as FrameworkElement).FindName("LeftTrack") as FrameworkElement;
FrameworkElement righttrack = (sender as FrameworkElement).FindName("RightTrack") as FrameworkElement;
double position = e.GetPosition(lefttrack).X;
double width = righttrack.TransformToVisual(lefttrack).Transform(new Point(righttrack.ActualWidth, righttrack.ActualHeight)).X;
double percent = position / width;
Slider slider = GetSliderParent(sender);
slider.Value = percent;
}
private void HorizontalThumb_DragStarted(object sender, System.Windows.Controls.Primitives.DragStartedEventArgs e)
{
if (GetSliderParent(sender) != timelineSlider) return;
bool notPlaying = (mediaElement.CurrentState == MediaElementState.Paused
|| mediaElement.CurrentState == MediaElementState.Stopped);
if (notPlaying)
{
playVideoWhenSliderDragIsOver = false;
}
else
{
playVideoWhenSliderDragIsOver = true;
mediaElement.Pause();
}
}
private void HorizontalThumb_DragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)
{
if (playVideoWhenSliderDragIsOver)
mediaElement.Play();
}
private void TimelineSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
if (duringTickEvent)
return;
Seek(timelineSlider.Value);
}
#endregion
#region updating current time
private void CompositionTarget_Rendering(object sender, EventArgs e)
{
duringTickEvent = true;
TimeSpan duration = mediaElement.NaturalDuration.TimeSpan;
if (duration.TotalSeconds != 0)
{
double percentComplete = (mediaElement.Position.TotalSeconds / duration.TotalSeconds);
timelineSlider.Value = percentComplete;
string text = TimeSpanToString(mediaElement.Position);
if (this.currentTimeTextBlock.Text != text)
this.currentTimeTextBlock.Text = text;
}
duringTickEvent = false;
}
private static string TimeSpanToString(TimeSpan time)
{
return string.Format("{0:00}:{1:00}", (time.Hours * 60) + time.Minutes, time.Seconds);
}
#endregion
private void MuteButton_Click(object sender, RoutedEventArgs e)
{
mediaElement.IsMuted = (bool)muteButton.IsChecked;
}
#region fullscreen mode
private void FullScreenButton_Click(object sender, RoutedEventArgs e)
{
var content = Application.Current.Host.Content;
content.IsFullScreen = !content.IsFullScreen;
}
private void Content_FullScreenChanged(object sender, EventArgs e)
{
UpdateVideoSize();
}
private void UpdateVideoSize()
{
if (App.Current.Host.Content.IsFullScreen)
{
// mediaElement takes all available space
VideoRow.Height = new GridLength(1, GridUnitType.Star);
VideoColumn.Width = new GridLength(1, GridUnitType.Star);
}
else
{
// mediaElement is only as big as the source video
VideoRow.Height = new GridLength(1, GridUnitType.Auto);
VideoColumn.Width = new GridLength(1, GridUnitType.Auto);
}
}
#endregion
}
}
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