Mouse Gestures for Internet Explorer

///////////////////////////////////////////////////////////////
//
// HotKeyCtrlEx.h
//
// Created: rhare - 21/07/2005
// Copyright (c) 2005 Ralph Hare (ralph.hare@ysgyfarnog.co.uk)
// All rights reserved.
//
// The code and information is provided "as-is" without
// warranty of any kind, either expressed or implied.
//
///////////////////////////////////////////////////////////////

#ifndef __HOTKEYCTRLEX_H_EC56A64E_0A51_4304_B13C_260CFE817DED_
#define __HOTKEYCTRLEX_H_EC56A64E_0A51_4304_B13C_260CFE817DED_

#include "KeyboardHook.h"

/**
 * HotKeyCtrlEx provides the same functionality as CHotKeyCtrl
 * (which is a wrapper around a msctls_hotkey32 window). CHotKeyCtrl
 * suffers from one major deficiency - its unable to capture
 * any keystrokes that include the TAB key. 
 *
 * HotKeyCtrlEx corrects this deficiency by extending the functionality
 * of an EDIT window. It achieves this by installing a low-level keyboard
 * hook to capture all keystrokes. If the keystroke is originated
 * while the EDIT window has focus, HotKeyCtrlEx will filter
 * messages such as Ctrl-Tab & Alt-Tab - The Tab key on its own and
 * Shift-Tab are currently un-filtered.
 *
 * Note: Subclassing the window isn't sufficient. When the hot-key
 * control is part of a property page, the property sheet window
 * always processes the Ctrl-Tab message before it gets to the
 * hot-key window.
 **/
class HotKeyCtrlEx : private KeyboardHook::Observer
{
public:
    HotKeyCtrlEx();
    ~HotKeyCtrlEx();

    HotKeyCtrlEx & operator = ( HWND hWnd );

    void GetHotKey( WORD &wVirtKeyCode, WORD &wModifiers );
    void SetHotKey( WORD wVirtKeyCode, WORD wModifiers );

private:
    LRESULT OnKeyDown( const KBDLLHOOKSTRUCT *pks );
    LRESULT OnKeyUp( const KBDLLHOOKSTRUCT *pks );

private:
    LRESULT OnKeyHook( UINT uMsg, const KBDLLHOOKSTRUCT *pks );

private:
    HWND    m_hWnd;

    WORD    m_vkCode;
    WORD    m_modifiers;

    WORD    m_activeModifiers;

    KeyboardHook    m_keyHook;
};

#endif // __HOTKEYCTRLEX_H_EC56A64E_0A51_4304_B13C_260CFE817DED_