OrthogonalSnapStrategy Class Reference

snaps to x- or y-coordinates of path points More...

#include <KoSnapStrategy.h>

Inheritance diagram for OrthogonalSnapStrategy:

Public Member Functions
QPainterPath	decoration (const KoViewConverter &converter) const override
	returns the current snap strategy decoration
	OrthogonalSnapStrategy ()
bool	snap (const QPointF &mousePosition, KoSnapProxy *proxy, qreal maxSnapDistance) override
Public Member Functions inherited from KoSnapStrategy
	KoSnapStrategy (KoSnapGuide::Strategy type)
QPointF	snappedPosition () const
	returns the snapped position form the last call to snapToPoints
SnapType	snappedType () const
KoSnapGuide::Strategy	type () const
	returns the strategies type
virtual	~KoSnapStrategy ()

Private Attributes
QLineF	m_hLine
QLineF	m_vLine

Additional Inherited Members
Public Types inherited from KoSnapStrategy
enum	SnapType { ToPoint = 0 , ToLine }
Static Public Member Functions inherited from KoSnapStrategy
static qreal	scalarProduct (const QPointF &p1, const QPointF &p2)
static qreal	squareDistance (const QPointF &p1, const QPointF &p2)
Protected Member Functions inherited from KoSnapStrategy
void	setSnappedPosition (const QPointF &position, SnapType snapType)
	sets the current snapped position

Detailed Description

snaps to x- or y-coordinates of path points

Definition at line 65 of file KoSnapStrategy.h.

Constructor & Destructor Documentation

OrthogonalSnapStrategy()

OrthogonalSnapStrategy::OrthogonalSnapStrategy

(

)

Definition at line 64 of file KoSnapStrategy.cpp.

    : KoSnapStrategy(KoSnapGuide::OrthogonalSnapping)
{
}

Member Function Documentation

decoration()

QPainterPath OrthogonalSnapStrategy::decoration ( const KoViewConverter & converter ) const

overridevirtual

returns the current snap strategy decoration

Implements KoSnapStrategy.

Definition at line 120 of file KoSnapStrategy.cpp.

{
    QPainterPath decoration;
    if (! m_hLine.isNull()) {
        decoration.moveTo(m_hLine.p1());
        decoration.lineTo(m_hLine.p2());
    }
    if (! m_vLine.isNull()) {
        decoration.moveTo(m_vLine.p1());
        decoration.lineTo(m_vLine.p2());
    }
    return decoration;
}

References decoration(), m_hLine, and m_vLine.

snap()

bool OrthogonalSnapStrategy::snap ( const QPointF & mousePosition, KoSnapProxy * proxy, qreal maxSnapDistance )

overridevirtual

Implements KoSnapStrategy.

Definition at line 69 of file KoSnapStrategy.cpp.

{
    Q_ASSERT(std::isfinite(maxSnapDistance));
    QPointF horzSnap, vertSnap;
    qreal minVertDist = HUGE_VAL;
    qreal minHorzDist = HUGE_VAL;
 
    QList<KoShape*> shapes = proxy->shapes(true);
    Q_FOREACH (KoShape * shape, shapes) {
        QList<QPointF> points = proxy->pointsFromShape(shape);
        foreach (const QPointF &point, points) {
            qreal dx = fabs(point.x() - mousePosition.x());
            if (dx < minHorzDist && dx < maxSnapDistance) {
                minHorzDist = dx;
                horzSnap = point;
            }
            qreal dy = fabs(point.y() - mousePosition.y());
            if (dy < minVertDist && dy < maxSnapDistance) {
                minVertDist = dy;
                vertSnap = point;
            }
        }
    }
 
    QPointF snappedPoint = mousePosition;
    SnapType snappedType = ToPoint;
 
    if (minHorzDist < HUGE_VAL)
        snappedPoint.setX(horzSnap.x());
    if (minVertDist < HUGE_VAL)
        snappedPoint.setY(vertSnap.y());
 
    if (minHorzDist < HUGE_VAL) {
        m_hLine = QLineF(horzSnap, snappedPoint);
    } else {
        m_hLine = QLineF();
        snappedType = ToLine;
    }
 
    if (minVertDist < HUGE_VAL) {
        m_vLine = QLineF(vertSnap, snappedPoint);
    } else {
        m_vLine = QLineF();
        snappedType = ToLine;
    }
 
    setSnappedPosition(snappedPoint, snappedType);
 
    return (minHorzDist < HUGE_VAL || minVertDist < HUGE_VAL);
}

References m_hLine, m_vLine, KoSnapProxy::pointsFromShape(), KoSnapStrategy::setSnappedPosition(), KoSnapProxy::shapes(), KoSnapStrategy::snappedType(), KoSnapStrategy::ToLine, and KoSnapStrategy::ToPoint.

Member Data Documentation

m_hLine

QLineF OrthogonalSnapStrategy::m_hLine

private

Definition at line 72 of file KoSnapStrategy.h.

m_vLine

QLineF OrthogonalSnapStrategy::m_vLine

private

Definition at line 73 of file KoSnapStrategy.h.

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The documentation for this class was generated from the following files:

• libs/flake/KoSnapStrategy.h
• libs/flake/KoSnapStrategy.cpp