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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Input;
namespace RealTimeGraphX
{
/// <summary>
/// Represents a graph relay command.
/// </summary>
/// <seealso cref="System.Windows.Input.ICommand" />
public class GraphCommand : ICommand
{
private Action _action;
private Func<bool> _canExecute;
/// <summary>
/// Initializes a new instance of the <see cref="GraphCommand"/> class.
/// </summary>
/// <param name="action">The action.</param>
/// <param name="canExecute">The can execute.</param>
public GraphCommand(Action action, Func<bool> canExecute)
{
_action = action;
_canExecute = canExecute;
}
/// <summary>
/// Initializes a new instance of the <see cref="GraphCommand"/> class.
/// </summary>
/// <param name="action">The action.</param>
public GraphCommand(Action action) : this(action, null)
{
}
/// <summary>
/// Defines the method that determines whether the command can execute in its current state.
/// </summary>
/// <param name="parameter">Data used by the command. If the command does not require data to be passed, this object can be set to null.</param>
/// <returns>
/// true if this command can be executed; otherwise, false.
/// </returns>
public bool CanExecute(object parameter)
{
if (_canExecute != null)
{
return _canExecute();
}
return true;
}
/// <summary>
/// Defines the method to be called when the command is invoked.
/// </summary>
/// <param name="parameter">Data used by the command. If the command does not require data to be passed, this object can be set to null.</param>
public void Execute(object parameter)
{
_action();
}
/// <summary>
/// Raises the can execute changed event.
/// </summary>
public void RaiseCanExecuteChanged()
{
CanExecuteChanged?.Invoke(this, new EventArgs());
}
/// <summary>
/// Occurs when changes occur that affect whether or not the command should execute.
/// </summary>
/// <returns></returns>
public event EventHandler CanExecuteChanged;
}
}
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