95 lines
2.6 KiB
C++
Executable File
95 lines
2.6 KiB
C++
Executable File
/**
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* @RDE_HEADER@
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* IntervalModel
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* $Id$
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* $HeadURL$
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* $Author$
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* Created by Christian Fröbel, SLSE, 2017-07-19
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*/
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#pragma once
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#include <AudioVideoManagement/ava_types.h>
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#include <LtsWidgets/lts_abstract_table_model.h>
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#include <boost/optional.hpp>
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namespace AudioVideoManagement
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{
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/**
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* Model for the Timeline so it can be shown in a TabView.
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* This is a poor man's version as the timeline is displayed in a table.
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* Later it will probably be replaced by something more usable.
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* @author Christian Fröbel
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*/
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class IntervalModel : public LtsWidgets::LtsAbstractTableModel<AvaTimelinePart>
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{
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Q_OBJECT
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public:
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enum Columns
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{
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Start = 0,
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End,
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Duration,
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};
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IntervalModel();
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QVariant data(const QModelIndex &index, int role) const override;
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void reset();
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bool isEmpty() const { return m_vecData.isEmpty(); }
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void setCurrentPosition(AvaTimePoint pos, bool forceSignal = false);
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boost::optional<AvaTimePoint> currentPosition() const { return m_currentPos; }
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/**
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* If the current position is within an interval:
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* - and the position is at least 2s into the interval, return that
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* - otherwise return the previous interval (unless there is none).
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* If the current position is between two intervals return the one before
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* the current position.
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*/
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const AvaTimelinePart &previousInterval() const;
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const AvaTimelinePart &nextInterval() const;
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signals:
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/**
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* Emitted if the current interval changed either due to
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* setCurrentPosition() or reset().
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* There must not always be a current interval as the current position
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* can also be between two intervals.
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* @param rowIndex might be invalid if the current position is between intervals.
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*/
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void currentIntervalChanged(bool hasPreviousInterval, bool hasNextInterval, const QModelIndex &rowIndex);
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public slots:
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void setTimezoneHoursOffset(int timezoneHoursOffset);
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private:
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QString dateTimeToStringy(const QDateTime &dt) const;
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QString msecsSinceEpochToStringy(qint64 msecs) const;
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/**
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* A HalfIndex denotes the current position within or between intervals.
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* The counting of indices is done as follows:
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* -1 0 1 2 3 4 5 6 7
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* ----- ----- ----- ----- # intervals 0...3
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* Examples:
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* within interval with index i => halfIndex = 2*i
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* before interval with index i => halfIndex = 2*i-1
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* after interval with index i => halfIndex = 2*i+1
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*/
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using HalfIndex = int;
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HalfIndex intervalForPos(AvaTimePoint pos) const;
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boost::optional<AvaTimePoint> m_currentPos;
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boost::optional<HalfIndex> m_currentInterval;
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int m_timezoneHoursOffset = 0;
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};
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} // namespace AudioVideoManagement
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