50 lines
1.2 KiB
C#
50 lines
1.2 KiB
C#
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using System;
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using System.Windows.Input;
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namespace DTS.Common.Classes.Viewer.Commands
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{
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public class RelayCommand : ICommand
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{
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#region Fields
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readonly Action<object> _execute;
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readonly Predicate<object> _canExecute;
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#endregion // Fields
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#region Constructors
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public RelayCommand(Action<object> execute)
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: this(execute, null)
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{
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}
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public RelayCommand(Action<object> execute, Predicate<object> canExecute)
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{
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_execute = execute ?? throw new ArgumentNullException("execute");
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_canExecute = canExecute;
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}
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#endregion // Constructors
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#region ICommand Members
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public bool CanExecute(object parameter)
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{
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return _canExecute?.Invoke(parameter) ?? true;
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}
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public event EventHandler CanExecuteChanged
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{
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add => CommandManager.RequerySuggested += value;
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remove => CommandManager.RequerySuggested -= value;
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}
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public void Execute(object parameter)
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{
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_execute(parameter);
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}
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#endregion // ICommand Members
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}
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}
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