mapwidget.h

Linux窗口程序设计__Qt4精彩实例分析上面的源代码第二部分.以循序渐进的方式进行源代码,包括Qt4下面的图形与图画对话框QMainWindow的源代码.

#ifndef MAPWIDGET_H
#define MAPWIDGET_H

#include <QGraphicsView>

class QPixmap;
class QLabel;
class QPointF;

class MapWidget : public QGraphicsView
{
    Q_OBJECT
public:
    MapWidget();
    
    void readMap();
    QPointF mapToMap(QPointF);
    
public slots:
    void slotZoom(int);
    
protected:
    void drawBackground(QPainter *painter, const QRectF &rect);
    void mouseMoveEvent(QMouseEvent *);
    
private:
    QPixmap map;
    qreal zoom;
    QLabel *viewCoord;
    QLabel *sceneCoord;
    QLabel *mapCoord;
    
    double x1,y1;	// map lefttop lon&lat
    double x2,y2;	// map rightbottom lon&lat
};

#endif 	// MAPWIDGET_H