Qt 4.2: scribblewidget.h Example File (qtopiacore/mousecalibration/scribblewidget.h)

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# scribblewidget.h Example File
qtopiacore/mousecalibration/scribblewidget.h

     /****************************************************************************
     **
     ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 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.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef SCRIBBLEWIDGET_H
     #define SCRIBBLEWIDGET_H

     #include <QLabel>
     #include <QMouseEvent>
     #include <QResizeEvent>
     #include <QImage>
     #include <QPainter>

     class ScribbleWidget : public QWidget
     {
     public:
         ScribbleWidget(QWidget *parent = 0);

         void resizeEvent(QResizeEvent *e);
         void mousePressEvent(QMouseEvent *event);
         void mouseMoveEvent(QMouseEvent *event);
         void mouseReleaseEvent(QMouseEvent *event);
         void paintEvent(QPaintEvent *);

     private:
         void drawLineTo(const QPoint &endPoint);

     private:
         bool scribbling;
         QPoint lastPoint;
         QImage image;
     };

     #endif // SCRIBBLEWIDGET_H