/******************************************************************************** Copyright (C) 2005-2008 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 versions 2.0 or 3.0 as published by the Free Software** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3** included in the packaging of this file.  Alternatively you may (at** your option) use any later version of the GNU General Public** License if such license has been publicly approved by Trolltech ASA** (or its successors, if any) and the KDE Free Qt Foundation. In** addition, as a special exception, Trolltech gives you certain** additional rights. These rights are described in the Trolltech GPL** Exception version 1.1, which can be found at** http://www.trolltech.com/products/qt/gplexception/ and in the file** GPL_EXCEPTION.txt in this package.**** Please review the following information to ensure GNU General** Public Licensing requirements will be met:** http://trolltech.com/products/qt/licenses/licensing/opensource/. If** you are unsure which license is appropriate for your use, please** review the following information:** http://trolltech.com/products/qt/licenses/licensing/licensingoverview** or contact the sales department at sales@trolltech.com.**** In addition, as a special exception, Trolltech, 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.**** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly** granted herein.**** 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 SCRIBBLEAREA_H#define SCRIBBLEAREA_H#include <QColor>#include <QImage>#include <QPoint>#include <QWidget>#include <sys/signal.h>#include "dataStruct.h"class ScribbleArea : public QWidget{    Q_OBJECTpublic:    ScribbleArea(QWidget *parent = 0);    bool openImage(const QString &fileName);    bool saveImage(const QString &fileName, const char *fileFormat);    void setPenColor(const QColor &newColor);    void setPenWidth(int newWidth);    bool isModified() const { return modified; }    QColor penColor() const { return myPenColor; }    int penWidth() const { return myPenWidth; }	/*****************添加的函數*****************/	/*	 * 信號接收處理函數	 */	void sigusr(int signo);	/********************************************/public slots:    void clearImage();    void print();protected:    void mousePressEvent(QMouseEvent *event);    void mouseMoveEvent(QMouseEvent *event);    void mouseReleaseEvent(QMouseEvent *event);    void paintEvent(QPaintEvent *event);    void resizeEvent(QResizeEvent *event);private:	/******************添加的函數**********************/	/*	 * 讀取手勢軌跡的共享區的數據,并計算返回結束點的坐標	 */	QPoint trackPosition();	/*	 * 讀取共享區的手的坐標的數據，并初始化lastPoint	 */	void InitPoint();	/**************************************************/    void drawLineTo(const QPoint &endPoint);    void resizeImage(QImage *image, const QSize &newSize);    bool modified;    bool scribbling;    int myPenWidth;    QColor myPenColor;    QImage image;    QPoint lastPoint;};#endif