137 lines
3.3 KiB
C#
137 lines
3.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Input;
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namespace OpenSEMI.ClientBase.Command
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{
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public class BaseCommand<T> : ICommand
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{
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#region Fields
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readonly Action<T> _execute = null;
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readonly Predicate<T> _canExecute = null;
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#endregion // Fields
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#region Constructors
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public BaseCommand(Action<T> execute)
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: this(execute, null)
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{
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}
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/// <summary>
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/// Creates a new command.
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/// </summary>
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/// <param name="execute">The execution logic.</param>
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/// <param name="canExecute">The execution status logic.</param>
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public BaseCommand(Action<T> execute, Predicate<T> canExecute)
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{
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if (execute == null)
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throw new ArgumentNullException("execute");
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_execute = 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 == null ? true : _canExecute((T)parameter);
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}
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public event EventHandler CanExecuteChanged
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{
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add
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{
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if (_canExecute != null)
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CommandManager.RequerySuggested += value;
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}
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remove
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{
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if (_canExecute != null)
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CommandManager.RequerySuggested -= value;
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}
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}
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public void Execute(object parameter)
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{
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_execute((T)parameter);
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}
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#endregion // ICommand Members
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}
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public class BaseCommand : ICommand
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{
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#region Fields
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readonly Action _execute;
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readonly Func<bool> _canExecute;
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#endregion // Fields
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#region Constructors
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/// <summary>
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/// Creates a new command that can always execute.
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/// </summary>
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/// <param name="execute">The execution logic.</param>
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public BaseCommand(Action execute)
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: this(execute, null)
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{
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}
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/// <summary>
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/// Creates a new command.
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/// </summary>
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/// <param name="execute">The execution logic.</param>
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/// <param name="canExecute">The execution status logic.</param>
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public BaseCommand(Action execute, Func<bool> canExecute)
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{
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if (execute == null)
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throw new ArgumentNullException("execute");
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_execute = 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 == null ? true : _canExecute();
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}
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public event EventHandler CanExecuteChanged
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{
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add
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{
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if (_canExecute != null)
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CommandManager.RequerySuggested += value;
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}
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remove
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{
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if (_canExecute != null)
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CommandManager.RequerySuggested -= value;
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}
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}
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public void Execute(object parameter)
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{
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_execute();
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}
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#endregion
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}
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}
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