/// <summary>
/// Versucht einen Sender für die primäre Anzeige zu aktivieren.
/// </summary>
/// <param name="source">Der gewünschte Sender.</param>
/// <param name="tx">Die aktuelle Änderungsumgebung.</param>
/// <returns>Gesetzt, wenn die Aktivierung erfolgreich war.</returns>
private Device EnsurePrimaryFeed(SourceSelection source, FeedTransaction tx)
{
// Make sure we can receive it
var device = EnsureFeed(source);
if (device != null)
{
return(device);
}
// See if there is any device we can free
var availableDevice =
m_devices
.Where(cancidate => cancidate.ReusePossible)
.Aggregate(default(Device), (best, test) => ((best != null) && (best.SecondaryFeeds.Count() <= test.SecondaryFeeds.Count())) ? best : test);
// None
if (availableDevice == null)
{
return(null);
}
// Stop all secondaries
foreach (var secondaryFeed in availableDevice.SecondaryFeeds)
{
tx.DisableSecondaryView(secondaryFeed);
}
// Run test again - can not fail
return(EnsureFeed(source));
}
/// <summary>
/// Beendet alle Aufträge.
/// </summary>
public void Shutdown()
{
// Prepare the change
using (var tx = new FeedTransaction(this))
{
// All feeds
foreach (var feed in Feeds)
{
// Primary
if (feed.IsPrimaryView)
{
tx.DisablePrimaryView(feed);
}
// Secondary
if (feed.IsSecondaryView)
{
tx.DisableSecondaryView(feed);
}
// Recording
foreach (var recording in feed.Recordings.ToArray())
{
tx.DisableRecording(feed, recording);
}
}
// Process all
tx.Commit();
}
}
/// <summary>
/// Verändert eine sekundäre Anzeige.
/// </summary>
/// <param name="sourceName">Der Name des Senders.</param>
public void StopSecondaryFeed(string sourceName)
{
// Look it up
var source = m_provider.Translate(sourceName);
if (source == null)
{
throw new ArgumentException("unbekannter sender", "sourceName");
}
// Find the feed
var feed = FindFeed(source);
if (feed == null)
{
return;
}
else if (!feed.IsSecondaryView)
{
return;
}
// Prepare the change
using (var tx = new FeedTransaction(this))
{
// Mark as active
tx.DisableSecondaryView(feed);
// Avoid cleanup
tx.Commit();
}
}
/// <summary>
/// Verändert die primäre Anzeige.
/// </summary>
/// <param name="sourceName">Die neue primäre Anzeige.</param>
/// <returns>Gesetzt, wenn die Änderung erfolgreich war.</returns>
public bool TryStartPrimaryFeed(string sourceName)
{
// Look it up
var source = m_provider.Translate(sourceName);
if (source == null)
{
throw new ArgumentException("unbekannter sender", "sourceName");
}
// Find the feed
var feed = FindFeed(source);
if (feed != null)
{
if (feed.IsPrimaryView)
{
return(true);
}
}
// Device we schedule on
Device device;
// Prepare the change
using (var tx = new FeedTransaction(this))
{
// See if we are secondary
if (feed != null)
{
if (feed.IsSecondaryView)
{
tx.DisableSecondaryView(feed);
}
}
// Locate the current primary view
var previous = PrimaryView;
if (previous != null)
{
tx.DisablePrimaryView(previous);
}
// Make sure we can receive it
device = EnsurePrimaryFeed(source, tx);
if (device == null)
{
return(false);
}
// Avoid cleanup
tx.Commit();
}
// Schedule for report
device.FireWhenAvailable(source.Source, OnPrimaryViewChanged);
// Report success
return(true);
}
/// <summary>
/// Versucht einen Sender für die primäre Anzeige zu aktivieren.
/// </summary>
/// <param name="source">Der gewünschte Sender.</param>
/// <param name="tx">Die aktuelle Änderungsumgebung.</param>
/// <returns>Gesetzt, wenn die Aktivierung erfolgreich war.</returns>
private Device EnsurePrimaryFeed( SourceSelection source, FeedTransaction tx )
{
// Make sure we can receive it
var device = EnsureFeed( source );
if (device != null)
return device;
// See if there is any device we can free
var availableDevice =
m_devices
.Where( cancidate => cancidate.ReusePossible )
.Aggregate( default( Device ), ( best, test ) => ((best != null) && (best.SecondaryFeeds.Count() <= test.SecondaryFeeds.Count())) ? best : test );
// None
if (availableDevice == null)
return null;
// Stop all secondaries
foreach (var secondaryFeed in availableDevice.SecondaryFeeds)
tx.DisableSecondaryView( secondaryFeed );
// Run test again - can not fail
return EnsureFeed( source );
}
/// <summary>
/// Beendet alle Aufträge.
/// </summary>
public void Shutdown()
{
// Prepare the change
using (var tx = new FeedTransaction( this ))
{
// All feeds
foreach (var feed in Feeds)
{
// Primary
if (feed.IsPrimaryView)
tx.DisablePrimaryView( feed );
// Secondary
if (feed.IsSecondaryView)
tx.DisableSecondaryView( feed );
// Recording
foreach (var recording in feed.Recordings.ToArray())
tx.DisableRecording( feed, recording );
}
// Process all
tx.Commit();
}
}
/// <summary>
/// Verändert eine sekundäre Anzeige.
/// </summary>
/// <param name="sourceName">Der Name des Senders.</param>
public void StopSecondaryFeed( string sourceName )
{
// Look it up
var source = m_provider.Translate( sourceName );
if (source == null)
throw new ArgumentException( "unbekannter sender", "sourceName" );
// Find the feed
var feed = FindFeed( source );
if (feed == null)
return;
else if (!feed.IsSecondaryView)
return;
// Prepare the change
using (var tx = new FeedTransaction( this ))
{
// Mark as active
tx.DisableSecondaryView( feed );
// Avoid cleanup
tx.Commit();
}
}
/// <summary>
/// Verändert die primäre Anzeige.
/// </summary>
/// <param name="sourceName">Die neue primäre Anzeige.</param>
/// <returns>Gesetzt, wenn die Änderung erfolgreich war.</returns>
public bool TryStartPrimaryFeed( string sourceName )
{
// Look it up
var source = m_provider.Translate( sourceName );
if (source == null)
throw new ArgumentException( "unbekannter sender", "sourceName" );
// Find the feed
var feed = FindFeed( source );
if (feed != null)
if (feed.IsPrimaryView)
return true;
// Device we schedule on
Device device;
// Prepare the change
using (var tx = new FeedTransaction( this ))
{
// See if we are secondary
if (feed != null)
if (feed.IsSecondaryView)
tx.DisableSecondaryView( feed );
// Locate the current primary view
var previous = PrimaryView;
if (previous != null)
tx.DisablePrimaryView( previous );
// Make sure we can receive it
device = EnsurePrimaryFeed( source, tx );
if (device == null)
return false;
// Avoid cleanup
tx.Commit();
}
// Schedule for report
device.FireWhenAvailable( source.Source, OnPrimaryViewChanged );
// Report success
return true;
}