70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
#ifndef MAPRULER_H
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#define MAPRULER_H
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#include <QGraphicsObject>
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#include <QLine>
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class MapRuler : public QGraphicsObject, private QLine
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{
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Q_OBJECT
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public:
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// thickness is given in scene pixels
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MapRuler(int thickness, QColor innerColor = Qt::yellow, QColor borderColor = Qt::black);
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QRectF boundingRect() const override;
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QPainterPath shape() const override;
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override;
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bool eventFilter(QObject *, QEvent *event) override;
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bool isAnchored() const { return anchored; }
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bool isLocked() const { return locked; }
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// Ruler start point in metatiles
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QPoint anchor() const { return QLine::p1(); }
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// Ruler end point in metatiles
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QPoint endPos() const { return QLine::p2(); }
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// X-coordinate of the ruler's left edge in metatiles
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int left() const { return qMin(anchor().x(), endPos().x()); }
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// Y-coordinate of the ruler's top edge in metatiles
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int top() const { return qMin(anchor().y(), endPos().y()); }
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// Horizontal component of the ruler in metatiles
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int deltaX() const { return QLine::dx(); }
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// Vertical component of the ruler in metatiles
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int deltaY() const { return QLine::dy(); }
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// Ruler width in metatiles
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int width() const { return qAbs(deltaX()); }
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// Ruler height in metatiles
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int height() const { return qAbs(deltaY()); }
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public slots:
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void mouseEvent(QGraphicsSceneMouseEvent *event);
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void setMapDimensions(const QSize &size);
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signals:
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void statusChanged(const QString &statusMessage);
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private:
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const int thickness;
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const qreal half_thickness;
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const QColor innerColor;
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const QColor borderColor;
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QSize mapSize;
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QRectF xRuler;
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QRectF yRuler;
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QLineF cornerTick;
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bool anchored;
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bool locked;
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void reset();
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void setAnchor(const QPointF &scenePos);
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void setEndPos(const QPointF &scenePos);
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QPoint snapToWithinBounds(QPoint pos) const;
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void updateGeometry();
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void updateStatus(Qt::Corner corner);
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int pixWidth() const { return width() * 16; }
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int pixHeight() const { return height() * 16; }
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};
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#endif // MAPRULER_H
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