Qt下触摸屏校准

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#ifndef CALIBRATION_H
#define CALIBRATION_H

#include <QDialog>
#ifdef __arm__
#include <QWSPointerCalibrationData>
#endif

//! [0]
class CalibrationDialog : public QDialog
{
Q_OBJECT
public:
CalibrationDialog();
~CalibrationDialog();
int exec();

protected:
void resizeEvent(QResizeEvent*);
void paintEvent(QPaintEvent*);
void mouseReleaseEvent(QMouseEvent*);
void accept();

private slots:
void beginCalibrate();

private:
#ifdef __arm__
QWSPointerCalibrationData data;
#endif
int m_pressCount;
bool m_isCalibrateBegin;
};
//! [0]

#endif

#include "calibration.h"

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

//! [0]
CalibrationDialog::CalibrationDialog()
{
setFocusPolicy(Qt::StrongFocus);
setFocus();
setModal(true);
m_pressCount = 0;
m_isCalibrateBegin=false;

QTimer::singleShot(1000,this,SLOT(beginCalibrate()));
}
//! [2]

//! [3]
CalibrationDialog::~CalibrationDialog()
{
}

void CalibrationDialog::resizeEvent(QResizeEvent *)
{
#ifdef __arm__
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);
#endif
}

//! [4]
int CalibrationDialog::exec()
{
grabMouse();
activateWindow();
int ret = QDialog::exec();
releaseMouse();
return ret;
}

void CalibrationDialog::beginCalibrate()
{
m_isCalibrateBegin=true;
#ifdef __arm__
QWSServer::mouseHandler()->clearCalibration();
#endif
update();
}

//! [4]

//! [5]
void CalibrationDialog::paintEvent(QPaintEvent*)
{
if(!m_isCalibrateBegin)
return;
QPainter p(this);
p.fillRect(rect(), Qt::white);

#ifdef __arm__
QPoint point = data.screenPoints[m_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() - 15, point.y() - 5, 30, 10, Qt::black);
p.fillRect(point.x() - 5, point.y() - 15, 10, 30, Qt::black);
#endif
}

//! [6]
void CalibrationDialog::mouseReleaseEvent(QMouseEvent *event)
{
#ifdef __arm__
if(!m_isCalibrateBegin)
return;
// 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[m_pressCount] = p;

if (++m_pressCount < 5)
repaint();
else
accept();
#endif
}
//! [6]

//! [7]
void CalibrationDialog::accept()
{
Q_ASSERT(m_pressCount == 5);

#ifdef __arm__
QWSServer::mouseHandler()->calibrate(&data);
#endif
QDialog::accept();
}

posted @ 2019-01-20 12:25 vkang 阅读(1216) 评论(0) 收藏举报

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