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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System;
namespace Xceed.Wpf.AvalonDock.Controls
{
internal class FocusChangeEventArgs : EventArgs
{
#region Constructors
public FocusChangeEventArgs( IntPtr gotFocusWinHandle, IntPtr lostFocusWinHandle )
{
GotFocusWinHandle = gotFocusWinHandle;
LostFocusWinHandle = lostFocusWinHandle;
}
#endregion
#region Properties
public IntPtr GotFocusWinHandle
{
get;
private set;
}
public IntPtr LostFocusWinHandle
{
get;
private set;
}
#endregion
}
internal class WindowHookHandler
{
#region Members
private IntPtr _windowHook;
private Win32Helper.HookProc _hookProc;
private ReentrantFlag _insideActivateEvent = new ReentrantFlag();
#endregion
#region Constructors
public WindowHookHandler()
{
}
#endregion
#region Public Methods
public void Attach()
{
_hookProc = new Win32Helper.HookProc( this.HookProc );
_windowHook = Win32Helper.SetWindowsHookEx(
Win32Helper.HookType.WH_CBT,
_hookProc,
IntPtr.Zero,
( int )Win32Helper.GetCurrentThreadId() );
}
public void Detach()
{
Win32Helper.UnhookWindowsHookEx( _windowHook );
}
public int HookProc( int code, IntPtr wParam, IntPtr lParam )
{
if( code == Win32Helper.HCBT_SETFOCUS )
{
if( FocusChanged != null )
FocusChanged( this, new FocusChangeEventArgs( wParam, lParam ) );
}
else if( code == Win32Helper.HCBT_ACTIVATE )
{
if( _insideActivateEvent.CanEnter )
{
using( _insideActivateEvent.Enter() )
{
//if (Activate != null)
// Activate(this, new WindowActivateEventArgs(wParam));
}
}
}
return Win32Helper.CallNextHookEx( _windowHook, code, wParam, lParam );
}
#endregion
#region Events
public event EventHandler<FocusChangeEventArgs> FocusChanged;
//public event EventHandler<WindowActivateEventArgs> Activate;
#endregion
}
}
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