using System;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Windows;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Threading;
 
using MS.Internal;
using MS.Win32;
 
namespace System.Windows.Automation.Peers
{
 
    /// 
    public class ButtonAutomationPeer : ButtonBaseAutomationPeer, IInvokeProvider
    {
        ///
        public ButtonAutomationPeer(Button owner): base(owner)
        {}
    
        ///
        override protected string GetClassNameCore()
        {
            return "Button";
        }
 
        ///
        override protected AutomationControlType GetAutomationControlTypeCore()
        {
            return AutomationControlType.Button;
        }
 
        /// 
        override public object GetPattern(PatternInterface patternInterface)
        {
            if (patternInterface == PatternInterface.Invoke)
                return this;
            else
                return base.GetPattern(patternInterface);
        }
 
        void IInvokeProvider.Invoke()
        {
            if(!IsEnabled())
                throw new ElementNotEnabledException();
 
            // Async call of click event
            // In ClickHandler opens a dialog and suspend the execution we don't want to block this thread
            Dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(delegate(object param)
            {
                ((Button)Owner).AutomationButtonBaseClick();
                return null;
            }), null);
        }
    }
}