38 lines
1.0 KiB
C#
38 lines
1.0 KiB
C#
using System.Windows.Input;
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namespace YwxApp.AiChat.Commands
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{
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/// <summary>
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/// Scroll command : The argument object passed by this constructor of this class is ScrollViewer
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/// </summary>
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class ScrollViewerCommand : ICommand
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{
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private readonly Action<object> _execute;
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private readonly Predicate<object> _canExecute;
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public ScrollViewerCommand(Action<object> execute, Predicate<object> canExecute = null)
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{
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_execute = execute ?? throw new ArgumentNullException(nameof(execute));
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_canExecute = canExecute;
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}
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public bool CanExecute(object parameter)
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{
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return _canExecute == null || _canExecute(parameter);
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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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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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}
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}
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