private static IAsyncOperation <IEnumerable <ITextDisplay> > loadDisplaysForConfigs(IEnumerable <TextDisplayConfig> configs)
{
return(Task.Run(async() =>
{
var displays = new List <ITextDisplay>();
foreach (var config in configs)
{
ITextDisplay driver = null;
var type = Type.GetType(config.DriverType);
if (null == type && null != config.DriverAssembly)
{
try
{
var assembly = Assembly.Load(new AssemblyName(config.DriverAssembly));
if (null != assembly)
{
type = assembly.DefinedTypes.Where(t => t.FullName == config.DriverType).FirstOrDefault().AsType();
}
}
catch (FileNotFoundException)
{
Debug.WriteLine("TextDisplayManager: Failed to load assembly " +
config.DriverAssembly +
" for driver " +
config.DriverType);
}
}
if (null != type)
{
driver = Activator.CreateInstance(type, config) as ITextDisplay;
}
if (null != driver)
{
try
{
await driver.InitializeAsync();
displays.Add(driver);
}
catch (Exception e)
{
Debug.WriteLine("TextDisplayManager: Failed to add driver " + type.ToString());
Debug.WriteLine("TextDisplayManager: " + e.Message);
}
}
else
{
Debug.WriteLine("TextDisplayManager: Failed to add driver: " + config.DriverType);
}
}
return displays as IEnumerable <ITextDisplay>;
}).AsAsyncOperation());
}
public static IAsyncOperation <IEnumerable <ITextDisplay> > GetDisplays()
{
return(Task.Run(async() =>
{
if (null == s_avaliableDisplays)
{
var displays = new List <ITextDisplay>();
var folder = Windows.Storage.ApplicationData.Current.LocalSettings;
try
{
var configFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Microsoft.Maker.Devices.TextDisplay/screens.config"));
var xmlString = await FileIO.ReadTextAsync(configFile);
var xml = XElement.Parse(xmlString);
var screensConfig = xml.Descendants("Screen");
foreach (var screenConfig in screensConfig)
{
var driverTypeAttribute = screensConfig.Attributes().Where(a => a.Name == "driverType").FirstOrDefault();
if (null != driverTypeAttribute)
{
var type = Type.GetType("Microsoft.Maker.Devices.TextDisplay." + driverTypeAttribute.Value);
ITextDisplay driver = Activator.CreateInstance(type, screenConfig) as ITextDisplay;
if (null != driver)
{
try
{
await driver.InitializeAsync();
displays.Add(driver);
}
catch (Exception e)
{
Debug.WriteLine("TextDisplayManager: Failed to add driver " + type.ToString());
Debug.WriteLine("TextDisplayManager: " + e.Message);
}
}
}
}
s_avaliableDisplays = displays;
}
catch (FileNotFoundException)
{
Debug.WriteLine("TextDisplayManager: Screen config file not found");
}
}
return s_avaliableDisplays;
}).AsAsyncOperation());
}
