PowerMaster/util/TimeLine/timeLineItem.h

#ifndef TIMELINEITEM_H
#define TIMELINEITEM_H

#include "timeLine_globals.h"
#include <QGraphicsObject>
#include <QDateTime>

namespace TimeLine
{

enum TimeUnit
{
    TU_Year = 1, //yyyy
    TU_Month, //yyyy/M/1
    TU_Day, //M/d
    TU_Hour, //M/d/hh
    TU_Minute_30, //hh:mm
    TU_Minute_20, //hh:mm
    TU_Minute_15, //hh:mm
    TU_Minute_10, //hh:mm
    TU_Minute_5, //hh:mm
    TU_Minute_3, //hh:mm
    TU_Minute_1, //hh:mm
    TU_Second_30, //hh:mm:ss
    TU_Second_10, //hh:mm:ss
    TU_Second_1, //hh:mm:ss
    TU_MSecond_500, //mm:ss:z
    TU_MSecond_100, //mm:ss:z
    TU_MSecond_50, //mm:ss:z
    TU_MSecond_10 //mm:ss:z
};

class TimeLineItemPrivate;
class TimeLineItem : public QGraphicsObject
{
    Q_OBJECT

public:
    explicit TimeLineItem();
    virtual ~TimeLineItem();

    virtual QRectF boundingRect() const;
    void updateBoundingRect(const QRect&);
    void setLineColor(QColor);
    void setScaleSize(int);
    void setState(DisplayState);
    void setTime(QDateTime);

    void zoomIn();
    void zoomOut();

protected:
    virtual void paint(QPainter*, const QStyleOptionGraphicsItem*, QWidget*);

private:
    void drawScaleLine(QPainter*);
    void drawTimeText(QPainter*, int);
    QDateTime calculateLeftTime(); //计算当前时间左侧第一个需要输出展示的时间点
    int calculateLeftTimePos(); //计算左侧时间点的坐标位置
    QDateTime calculateTime(int); //计算坐标点所对应的时间

private:
    TimeLineItemPrivate* d_ptr;
    friend class TimeLineWidget;
};

} // namespace TimeLine

#endif