44 lines
1 KiB
C++
44 lines
1 KiB
C++
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/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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#include "kwinglobals.h"
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#include <QCursor>
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#include "kdebug.h"
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#include <assert.h>
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namespace KWin
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{
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// Optimized version of QCursor::pos() that tries to avoid X roundtrips
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// by updating the value only when the X timestamp changes.
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static QPoint last_cursor_pos;
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static Time last_cursor_timestamp = CurrentTime;
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QPoint cursorPos()
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{
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last_cursor_timestamp = CurrentTime;
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if( last_cursor_timestamp == CurrentTime
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|| last_cursor_timestamp != QX11Info::appTime())
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{
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last_cursor_timestamp = QX11Info::appTime();
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last_cursor_pos = QCursor::pos();
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}
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return last_cursor_pos;
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}
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} // namespace
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