Qt Mobility Reference Documentation

mapwidget.h Example File

mapviewer/mapwidget.h
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 #ifndef MAPWIDGET_H
 #define MAPWIDGET_H

 #include <qgraphicsgeomap.h>
 #include <qgeomapcircleobject.h>
 #include <qgeomappingmanager.h>
 #include <qgeocoordinate.h>

 #include <QGraphicsSceneMouseEvent>
 #include <QTime>

 QTM_USE_NAMESPACE

 class MapWidget : public QGraphicsGeoMap
 {
     Q_OBJECT
 public:
     MapWidget(QGeoMappingManager *manager);
     ~MapWidget();

 public slots:
     void setMouseClickCoordQuery(bool state);

 signals:
     void coordQueryResult(const QGeoCoordinate &coord);

 private slots:
     void kineticTimerEvent();

 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent* event);
     void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);
     void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
     void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
     void keyPressEvent(QKeyEvent *event);
     void keyReleaseEvent(QKeyEvent* event);
     void wheelEvent(QGraphicsSceneWheelEvent* event);

 private:
     bool coordQueryState;
     bool panActive;
     bool panDecellerate;

     // Fractional pan, used by panFloatWrapper
     QPointF remainingPan;

     // current kinetic panning speed, in pixel/msec
     QPointF kineticPanSpeed;
     QPoint panDir;
     QTimer *kineticTimer;
     QTime lastMoveTime;

     // An entry in the mouse history. first=speed, second=time
     typedef QPair<QPointF, QTime> MouseHistoryEntry;
     // A history of the last (currently 5) mouse move events is stored in order to smooth out movement detection for kinetic panning
     QList<MouseHistoryEntry> mouseHistory;

     void panFloatWrapper(const QPointF& delta);
     void applyPan(const Qt::KeyboardModifiers& modifiers);

 public:
     QGeoMapCircleObject *lastCircle;
 };

 #endif // MAPWIDGET_H
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