//-------------------------------------------------------------------
// Command Registration
//-------------------------------------------------------------------
#region Command Registration
/// <summary>
/// Register a command with the CommandSequence
/// Commands are composed in the same order that they are registered
/// </summary>
/// <param name="cmd">Command to register with this CommandSequence</param>
public void RegisterCommand(ICommand cmd)
{
if (cmd == null)
{
throw new ArgumentException(nameof(cmd));
}
if (cmd == this)
{
throw new ArgumentException("Cannot register a CommandSequence with itself");
}
lock (this.registeredCommands)
{
CommandSequence seq = cmd as CommandSequence;
if (seq == null)
{
this.AddCommand(cmd);
}
else
{
// If the command is itself a CommandSequence then we crack it open
// and add the individual commands within it. This enables composing
// commands with other CommandSequences. Flattening is required in
// the case when multiple command sequences share the same queue
foreach (ICommand subcmd in seq.registeredCommands)
{
this.AddCommand(subcmd);
}
}
}
this.OnCanExecuteChanged();
}
/// <summary>
/// Perform additional initialization on a device that has been newly added to the collection of connected devices
/// </summary>
/// <param name="dpvm">The device that has been added</param>
private void OnDeviceAdded(DevicePortalViewModel dpvm)
{
dpvm.PropertyChanged += this.DevicePropertyChanged;
CommandSequence cmdSeq = dpvm.CreateCommandSequence();
cmdSeq.RegisterCommand(dpvm.ReestablishConnectionCommand);
cmdSeq.RegisterCommand(dpvm.RefreshDeviceNameCommand);
cmdSeq.RegisterCommand(dpvm.StartListeningForSystemPerfCommand);
cmdSeq.Execute(null);
}