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# calibration.cpp Example File
qtopiacore/mousecalibration/calibration.cpp

    /****************************************************************************
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    ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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    #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];
        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)
    {
        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();
    }