SegmentSlider.hpp

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 * MuViNo - ViTooKi Video Annotation Tool                               *
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 * title:   SegmentSlider.hpp                                       *
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 * $Id: SegmentSlider_8hpp-source.html,v 1.1 2004/09/27 07:24:51 mtaschwer Exp $
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#ifndef _SEGMENT_SLIDER_HPP_
#define _SEGMENT_SLIDER_HPP_

#include <list>
#include <qslider.h>

#include "MP7Time.hpp"
#include "MP7VideoSegment.hpp"

class QButton;
class QFrame;
class QSpinBox;

class SegmentSlider : public QSlider
{
  Q_OBJECT

public:
  SegmentSlider(QWidget *parent, const char *name = NULL);

  ~SegmentSlider();

  void setSegment(const MP7VideoSegment &segment, bool emitSignal = true);

  MP7VideoSegment getSegment() const { return segment; }

  void setTitleLabel(QLabel *label);

  void setStartTimeLabel(QLabel *label);

  void setEndTimeLabel(QLabel *label);

  void setLevelSpinBox(QSpinBox *spinbox);

  void setPrevSiblingButton(QButton *button);

  void setNextSiblingButton(QButton *button);

  void enableSegmentZooming(bool on);

public slots:
  void editSegment();

  void removeSegment();

  void segmentLevelChange(int level);

  void setSliderFromMediaTime(const MP7Time &time);

  void updateSegmentDisplay();

  void gotoPrevSibling();

  void gotoNextSibling();

signals:
  void segmentChanged(MP7ListViewItem *segmentRoot);

  void sliderMoved(const MP7Time &time);

protected:
  void setMarker(const MP7VideoSegment &subsegment);

  void removeMarker(int value);

  void removeMarker(const MP7Time &time);

  void repositionMarkers();

  int timeToValue(const MP7Time &time) const;

  MP7Time valueToTime(int value) const;

  int durationToValue(const MP7Time &time) const;

  virtual void resizeEvent(QResizeEvent *e);

  virtual void mouseDoubleClickEvent (QMouseEvent *e);

protected slots:
  void emitSliderMovedSignal();

private:
  struct marker {
    int value;
    int length;
    QFrame *qframe;
    QString segmentTip;
    QRect rect;
    MP7VideoSegment segment;
  };

  std::list<marker> markers;

  MP7VideoSegment segment;

  MP7Time mediaTime;

  QLabel *titleLabel;

  QLabel *startTimeLabel;

  QLabel *endTimeLabel;

  QSpinBox *levelSpinBox;

  QButton *prevSiblingButton;

  QButton *nextSiblingButton;

  bool segmentZooming;
};

#endif /* _SEGMENT_SLIDER_HPP_ */

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