67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
// Ruler class definition
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//
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// A QWidget displaying a ruler and allowing user zooming and shifting
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//
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// QATSH Copyright 2009 Jean-Philippe MEURET <jpmeuret@free.fr>
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#ifndef RULER_H
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#define RULER_H
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#include <QWidget>
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class RulerSpec;
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class Ruler : public QWidget
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{
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Q_OBJECT
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public:
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Ruler(QWidget *parent = 0);
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void zoom(double dRelativeAnchor, double dRelativeFactor);
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void zoomAll();
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signals:
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void zoomShift(double dRelFactor, double dShiftValue);
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public slots:
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void onSpecChanged(const RulerSpec* pSpec);
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protected:
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virtual void mousePressEvent(QMouseEvent *pqEvent);
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virtual void mouseMoveEvent(QMouseEvent *pqEvent);
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virtual void mouseReleaseEvent(QMouseEvent *pqEvent);
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virtual void wheelEvent(QWheelEvent* pqEvent);
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virtual void paintEvent(QPaintEvent* pqEvent);
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virtual void resizeEvent(QResizeEvent *pqEvent);
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void propagateZoomShift(int nViewLength);
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void zoom(const QPoint& qpAnchorPos, double dRelativeFactor);
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void shift(const QPoint& qpNewPos);
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void resize(const QSize& qSize);
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void draw(QPainter& qPainter);
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private:
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// Specification of the ruler.
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const RulerSpec* _pSpec;
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// Shifting (=translating) data
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bool _bShifting;
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QPoint _qpLastShiftingPos;
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// Current absolute zoom factor
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double _dZoomFactor;
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// Current offset from rulerSpec.min
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double _dValueOffset;
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};
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#endif // RULER_H
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