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//
// Command.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2013-2017 Jean-Philippe Bruyère
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Xml.Serialization;
using System.ComponentModel;
namespace Crow
{
/// <summary>
/// helper class to bind in one step icon, caption, action, and validity tests to a controls
/// </summary>
public class Command : IValueChange
{
#region IValueChange implementation
public event EventHandler<ValueChangeEventArgs> ValueChanged;
public virtual void NotifyValueChanged(string MemberName, object _value)
{
ValueChanged.Raise(this, new ValueChangeEventArgs(MemberName, _value));
}
#endregion
#region CTOR
/// <summary>
/// Initializes a new instance of Command with the action pass as argument.
/// </summary>
/// <param name="_executeAction">action to excecute when command is triggered</param>
public Command (Action _executeAction)
{
execute = _executeAction;
}
#endregion
Action execute;
string caption;
Picture icon;
bool canExecute = true;
#region Public properties
/// <summary>
/// if true, action defined in this command may be executed,
/// </summary>
[XmlAttributeAttribute][DefaultValue(true)]
public virtual bool CanExecute {
get { return canExecute; }
set {
if (canExecute == value)
return;
canExecute = value;
NotifyValueChanged ("CanExecute", canExecute);
}
}
/// <summary>
/// label to display in the bound control
/// </summary>
[XmlAttributeAttribute][DefaultValue("Unamed Command")]
public virtual string Caption {
get { return caption; }
set {
if (caption == value)
return;
caption = value;
NotifyValueChanged ("Caption", caption);
}
}
/// <summary>
/// Icon to display in the bound control
/// </summary>
[XmlAttributeAttribute]
public Picture Icon {
get { return icon; }
set {
if (icon == value)
return;
icon = value;
NotifyValueChanged ("Icon", icon);
}
}
#endregion
/// <summary>
/// trigger the execution of the command
/// </summary>
public void Execute(){
if (execute != null && CanExecute)
execute ();
}
internal void raiseAllValuesChanged(){
NotifyValueChanged ("CanExecute", canExecute);
NotifyValueChanged ("Icon", icon);
NotifyValueChanged ("Caption", caption);
}
}
}
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