/// <summary>
/// Determines whether a display strategy is available
/// </summary>
/// <param name="displayStrategy">the display strategy object</param>
/// <returns><c>true</c> if the strategy available, otherwise <c>false</c></returns>
public bool isDisplayStrategyAvailable(AOutputManager displayStrategy)
{
if (displayStrategy.GetType().Namespace != null && displayStrategy.GetType().Namespace.Equals("StrategyMVBD"))
{
return(displayStrategy.isDisplayStrategyAvailable());
}
else
{
return(true);
}
}
/// <summary>
/// Returns ALL possible devices (for all implemented Adapters)
/// </summary>
/// <returns>a list of ALL possible devices</returns>
public List <Device> getAllPosibleDevices()
{
// the list of devices are only requested if no list exist
if (allDevices == null || allDevices.Equals(new List <Device>()))
{
allDevices = new List <Device>();
Settings settings = new Settings();
// gets all implementations of this abstract class
List <Strategy> allDisplayStrategys = settings.getPosibleDisplayStrategies();
foreach (Strategy st in allDisplayStrategys)
{
try
{
Type type = Type.GetType(st.className);
if (type == null)
{
break;
}
if (this.GetType().Equals(type))
{
List <Device> devices = this.getPosibleDevices();
if (devices != null)
{
allDevices.AddRange(devices);
}
}
else
{
using (AOutputManager ads = (AOutputManager)Activator.CreateInstance(type, strategyMgr))
{
List <Device> devices = ads.getPosibleDevices();
if (devices != null)
{
allDevices.AddRange(devices);
}
}
}
}
catch (InvalidCastException ic)
{
throw new InvalidCastException("Exception in GRANTManager.AbstractClasses.getAllPosibleDevices(): " + ic.Message);
}
catch (ArgumentNullException e)
{
throw new ArgumentNullException("Exception in GRANTManager.AbstractClasses.getAllPosibleDevices(): " + e.Message);
}
}
}
return(allDevices);
}
public void setSpecifiedDisplayStrategy(String displayStrategyClassName)
{
try
{
Type type = Type.GetType(displayStrategyClassName);
if (specifiedDisplayStrategy != null)
{
specifiedDisplayStrategy.Dispose(); //sorgt dafür, dass ggf. die alte TCP-Verbindung beendet wird
// specifiedDisplayStrategy = null;
}
//falls MVBD als DisplayStrstegy gesetzt werden soll, muss geprüft werden, ob MVBD aktiv ist
AOutputManager om = (AOutputManager)Activator.CreateInstance(type, this);
if (getSpecifiedDisplayStrategy() == null || getSpecifiedDisplayStrategy().isDisplayStrategyAvailable(om))
{
if (this.getSpecifiedBrailleDisplay() != null)
{
this.getSpecifiedBrailleDisplay().removeAllViews();
}
specifiedDisplayStrategy = om;
}
else
{
Console.WriteLine("Die DisplayStrategy ist nicht verfügbar.");
System.Windows.Forms.MessageBox.Show("The chosen display strategy is not available!", "GRANT exception");
om.Dispose();
}
}
catch (InvalidCastException ic)
{
throw new InvalidCastException("Fehler bei StrategyManager_setSpecifieddisplayStrategy: " + ic.Message);
}
catch (ArgumentException ae)
{
throw new ArgumentException("Fehler bei StrategyManager_setSpecifieddisplayStrategy: " + ae.Message);
}
catch (Exception e)
{
throw new Exception("Fehler bei StrategyManager_setSpecifieddisplayStrategy: " + e.Message);
}
}
