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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- WMHooks.h
#ifndef __RFB_WIN32_WM_HOOKS_H__
#define __RFB_WIN32_WM_HOOKS_H__
#include <windows.h>
#include <rfb/UpdateTracker.h>
#include <rdr/Exception.h>
#include <rfb_win32/Win32Util.h>
namespace rfb {
namespace win32 {
// -=- WMHooks
// Uses the wm_hooks DLL to intercept window messages, to get _hints_ as
// to what may have changed on-screen. Updates are notified via a Win32
// event, and retrieved using the getUpdates method, which is thread-safe.
class WMHooks {
public:
WMHooks();
~WMHooks();
// Specify the event object to notify. Starts the hook subsystem if it is
// not already active, and returns false if the hooks fail to start.
bool setEvent(HANDLE updateEvent);
// Copies any new updates to the UpdateTracker. Returns true if new updates
// were added, false otherwise.
bool getUpdates(UpdateTracker* ut);
#ifdef _DEBUG
// Get notifications of any messages in the given range, to any hooked window
void setDiagnosticRange(UINT min, UINT max);
#endif
// * INTERNAL NOTIFICATION FUNCTION *
void NotifyHooksRegion(const Region& r);
protected:
HANDLE updateEvent;
bool updatesReady;
SimpleUpdateTracker updates;
};
// -=- Support for filtering out local input events while remote connections are
// active. Implemented using SetWindowsHookEx for portability.
class WMBlockInput {
public:
WMBlockInput();
~WMBlockInput();
bool blockInputs(bool block);
protected:
bool active;
};
};
};
#endif // __RFB_WIN32_WM_HOOKS_H__
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