CTimeAxis.h

// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ImtCore-Commercial
#pragma once
 
 
// Qt includes
#include <QtCore/QDateTime>
#include <QtWidgets/QGraphicsRectItem>
#include <QtWidgets/QStyleOptionGraphicsItem>
 
// ImtCore includes
#include <imtloggui/IEventScenePositionProvider.h>
 
 
namespace imtloggui
{
 
 
class CTimeAxis : public QObject, public QGraphicsRectItem, virtual public IEventScenePositionProvider
{
       Q_OBJECT
 
public:
       typedef QGraphicsRectItem BaseClass;
 
       // Quantization thresholds in secs
       enum QuantizationThresholds
       {
              QUA_DAY = 86400 * 3,
              QUA_MONTH = 86400 * 365,
       };
 
       enum ChangeFlags
       {
              CF_POSITION = 0,
              CF_BEGIN_VALUE,
              CF_END_VALUE,
              CF_SCALE
       };
 
       CTimeAxis(QGraphicsItem* parent = nullptr);
 
       void SetColor(const QColor& color);
       void EnsureTimeRange(const QDateTime& time);
       int GetMargin();
       void CreateTimeItemTable();
 
       // reimplemented (QGraphicsRectItem)
       virtual QRectF boundingRect() const override;
       virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
       // reimplemented (QGraphicsItem)
       void setPos(const QPointF& origin);
       void setPos(double x, double y);
 
       // reimplemented (IEventScenePositionProvider)
       virtual double GetScenePositionFromTime(const QDateTime& time) const override;
       virtual QDateTime GetTimeFromScenePosition(double position) const override;
       virtual QDateTime GetBeginTime() const override;
       virtual QDateTime GetEndTime() const override;
       virtual QDateTime GetVisibleBeginTime() const override;
       virtual QDateTime GetVisibleEndTime() const override;
 
Q_SIGNALS:
       void EmitAxisPosChanged(const QPointF& oldPos, const QPointF& newPos);
       void EmitAxisBeginTimeChanged(const QDateTime& oldTime, const QDateTime& newTime);
       void EmitAxisEndTimeChanged(const QDateTime& oldTime, const QDateTime& newTime);
 
protected:
       enum TickType
       {
              TT_MAJOR = 0,
              TT_MINOR
       };
 
       enum TimeInterval
       {
              TI_1MS = 0,
              TI_10MS,
              TI_100MS,
 
              TI_1S,
              TI_5S,
              TI_15S,
              TI_30S,
 
              TI_1M,
              TI_5M,
              TI_15M,
              TI_30M,
 
              TI_1H,
              TI_3H,
              TI_6H,
              TI_12H,
 
              TI_DAY,
              TI_WEEK,
              TI_MONTH,
              TI_QUARTER,
              TI_YEAR,
 
              TI_COUNT,
              TI_NONE
       };
 
       struct IntervalsInfo
       {
              TimeInterval majorInterval;
              TimeInterval minorInterval;
              QString timeFormat;
       };
 
       struct TickInfo
       {
              TickType type;
              QString timeFormat;
       };
 
       typedef QMap<QDateTime, TickInfo> Ticks;
 
       struct MinorIntervalItem
       {
              double scaleMin;
              double distance;
              TimeInterval interval;
       };
 
       struct MajorIntervalItem
       {
              double scaleMin;
              double scaleMax;
              double distance;
              TimeInterval interval;
              QString timeFormat;
 
              QVector<MinorIntervalItem> minorIntervals;
       };
 
       QVector<MajorIntervalItem> m_intervals;
 
protected:
       IntervalsInfo CalculateIntervals(double scale) const;
       Ticks CalculateTicks(const IntervalsInfo& intervalsInfo) const;
 
       double GetCurrentScaleX() const;
       double GetCurrentScaleY() const;
       QRectF GetSceneVisibleRect() const;
       QRectF GetItemVisibleRect() const;
 
       double GetRectPositionFromTime(const QDateTime& time) const;
       QDateTime GetTimeFromRectPosition(double position) const;
 
private:
       QDateTime m_firstEvent;
       QDateTime m_lastEvent;
       QDateTime m_beginTime;
       QDateTime m_endTime;
       QColor m_color;
       QFontMetrics m_fontMetrics;
 
       double m_minMinorTickStep;
       double m_labelWidthFactor;
};
 
 
} // namespace imtloggui