calibration.cpp Example File
qws/mousecalibration/calibration.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information (qt-info@nokia.com)
 **
 ** This file is part of the example classes of the Qt Toolkit.
 **
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License versions 2.0 or 3.0 as published by the Free
 ** Software Foundation and appearing in the file LICENSE.GPL included in
 ** the packaging of this file.  Please review the following information
 ** to ensure GNU General Public Licensing requirements will be met:
 ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
 ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
 ** exception, Nokia gives you certain additional rights. These rights
 ** are described in the Nokia Qt GPL Exception version 1.3, included in
 ** the file GPL_EXCEPTION.txt in this package.
 **
 ** Qt for Windows(R) Licensees
 ** As a special exception, Nokia, as the sole copyright holder for Qt
 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
 ** right for the Qt/Eclipse Integration to link to functionality
 ** provided by Qt Designer and its related libraries.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at qt-sales@nokia.com.
 **
 ****************************************************************************/

 #include "calibration.h"

 #include <QWSPointerCalibrationData>
 #include <QPainter>
 #include <QFile>
 #include <QTimer>
 #include <QApplication>
 #include <QDesktopWidget>
 #include <QMouseEvent>
 #include <QScreen>
 #include <QWSServer>

 Calibration::Calibration()
 {
     QRect desktop = QApplication::desktop()->geometry();
     desktop.moveTo(QPoint(0, 0));
     setGeometry(desktop);

     setFocusPolicy(Qt::StrongFocus);
     setFocus();
     setModal(true);

     int width = qt_screen->deviceWidth();
     int height = qt_screen->deviceHeight();

     int dx = width / 10;
     int dy = height / 10;

     QPoint *points = data.screenPoints;
     points[QWSPointerCalibrationData::TopLeft] = QPoint(dx, dy);
     points[QWSPointerCalibrationData::BottomLeft] = QPoint(dx, height - dy);
     points[QWSPointerCalibrationData::BottomRight] = QPoint(width - dx, height - dy);
     points[QWSPointerCalibrationData::TopRight] = QPoint(width - dx, dy);
     points[QWSPointerCalibrationData::Center] = QPoint(width / 2, height / 2);

     pressCount = 0;
 }

 Calibration::~Calibration()
 {
 }

 int Calibration::exec()
 {
     QWSServer::mouseHandler()->clearCalibration();
     grabMouse();
     activateWindow();
     int ret = QDialog::exec();
     releaseMouse();
     return ret;
 }

 void Calibration::paintEvent(QPaintEvent*)
 {
     QPainter p(this);
     p.fillRect(rect(), Qt::white);

     QPoint point = data.screenPoints[pressCount];

     // Map to logical coordinates in case the screen is transformed
     QSize screenSize(qt_screen->deviceWidth(), qt_screen->deviceHeight());
     point = qt_screen->mapFromDevice(point, screenSize);

     p.fillRect(point.x() - 6, point.y() - 1, 13, 3, Qt::black);
     p.fillRect(point.x() - 1, point.y() - 6, 3, 13, Qt::black);
 }

 void Calibration::mouseReleaseEvent(QMouseEvent *event)
 {
     // Map from device coordinates in case the screen is transformed
     QSize screenSize(qt_screen->width(), qt_screen->height());
     QPoint p = qt_screen->mapToDevice(event->pos(), screenSize);

     data.devPoints[pressCount] = p;

     if (++pressCount < 5)
         repaint();
     else
         accept();
 }

 void Calibration::accept()
 {
     Q_ASSERT(pressCount == 5);
     QWSServer::mouseHandler()->calibrate(&data);
     QDialog::accept();
 }