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79 lines
2.1 KiB
79 lines
2.1 KiB
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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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 GummingCommon
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{
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public class DelegateCommand : ICommand
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{
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public static List<string> ButtonInfo = new List<string>();
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#region ICommand realization
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[DebuggerStepThrough]
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public bool CanExecute(object parameter)
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{
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return _canExecute == null ? true : _canExecute(parameter);
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}
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private event EventHandler _internalCanExecuteChanged;
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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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_internalCanExecuteChanged += value;
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CommandManager.RequerySuggested += value;
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}
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remove
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{
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_internalCanExecuteChanged -= value;
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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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ButtonInfo.Add(string.Format("{0}|{1}|{2}", _execute.Method.DeclaringType.Namespace, _execute.Method.DeclaringType.Name, _execute.Method.Name));
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_execute(parameter);
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RaiseCanExecuteState();
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}
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#endregion
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readonly Action<object> _execute;
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readonly Predicate<object> _canExecute;
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public DelegateCommand(Action<object> execute)
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: this(execute, null)
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{ }
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public DelegateCommand(Action<object> execute, Predicate<object> canExecute)
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{
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if (execute == null)
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throw new ArgumentNullException("RelayCommand argument can not be null!");
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_execute = execute;
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_canExecute = canExecute;
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}
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public void RaiseCanExecuteState()
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{
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if (_canExecute != null)
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OnCanExecuteChanged();
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}
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protected virtual void OnCanExecuteChanged()
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{
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EventHandler eCanExecuteChanged = _internalCanExecuteChanged;
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if (eCanExecuteChanged != null)
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eCanExecuteChanged(this, EventArgs.Empty);
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}
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}
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}
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