KisSnapLineStrategy Class Reference

#include <kis_snap_line_strategy.h>

Inheritance diagram for KisSnapLineStrategy:

Classes
struct	Private

Public Member Functions
void	addLine (Qt::Orientation orientation, qreal pos)
QPainterPath	decoration (const KoViewConverter &converter) const override
	returns the current snap strategy decoration
	KisSnapLineStrategy (KoSnapGuide::Strategy type=KoSnapGuide::CustomSnapping)
void	setHorizontalLines (const QList< qreal > &lines)
void	setVerticalLines (const QList< qreal > &lines)
bool	snap (const QPointF &mousePosition, KoSnapProxy *proxy, qreal maxSnapDistance) override
	~KisSnapLineStrategy () 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
const QScopedPointer< Private >	m_d

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

Definition at line 15 of file kis_snap_line_strategy.h.

Constructor & Destructor Documentation

KisSnapLineStrategy()

KisSnapLineStrategy::KisSnapLineStrategy

(

KoSnapGuide::Strategy

type = KoSnapGuide::CustomSnapping

)

Definition at line 19 of file kis_snap_line_strategy.cpp.

    : KoSnapStrategy(type),
      m_d(new Private)
{
}

~KisSnapLineStrategy()

KisSnapLineStrategy::~KisSnapLineStrategy ( )

override

Definition at line 25 of file kis_snap_line_strategy.cpp.

{
}

Member Function Documentation

addLine()

void KisSnapLineStrategy::addLine	(	Qt::Orientation	orientation,
		qreal	pos )

Definition at line 83 of file kis_snap_line_strategy.cpp.

{
    if (orientation == Qt::Horizontal) {
        m_d->horizontalLines << pos;
    } else {
        m_d->verticalLines << pos;
    }
}

References m_d.

decoration()

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

overridevirtual

returns the current snap strategy decoration

Implements KoSnapStrategy.

Definition at line 72 of file kis_snap_line_strategy.cpp.

{
    QSizeF unzoomedSize = converter.viewToDocument(QSizeF(5, 5));
    QPainterPath decoration;
    decoration.moveTo(snappedPosition() - QPointF(unzoomedSize.width(), 0));
    decoration.lineTo(snappedPosition() + QPointF(unzoomedSize.width(), 0));
    decoration.moveTo(snappedPosition() - QPointF(0, unzoomedSize.height()));
    decoration.lineTo(snappedPosition() + QPointF(0, unzoomedSize.height()));
    return decoration;
}

References decoration(), KoSnapStrategy::snappedPosition(), and KoViewConverter::viewToDocument().

setHorizontalLines()

void KisSnapLineStrategy::setHorizontalLines

(

const QList< qreal > &

lines

)

Definition at line 92 of file kis_snap_line_strategy.cpp.

{
    m_d->horizontalLines = lines;
}

References m_d.

setVerticalLines()

void KisSnapLineStrategy::setVerticalLines

(

const QList< qreal > &

lines

)

Definition at line 97 of file kis_snap_line_strategy.cpp.

{
    m_d->verticalLines = lines;
}

References m_d.

snap()

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

overridevirtual

Implements KoSnapStrategy.

Definition at line 29 of file kis_snap_line_strategy.cpp.

{
    Q_UNUSED(proxy);
 
    QPointF snappedPoint = mousePosition;
    qreal minXDistance = std::numeric_limits<qreal>::max();
    qreal minYDistance = std::numeric_limits<qreal>::max();
 
    Q_FOREACH (qreal line, m_d->horizontalLines) {
        const qreal dist = qAbs(mousePosition.y() - line);
 
        if (dist < maxSnapDistance && dist < minYDistance) {
            minYDistance = dist;
            snappedPoint.ry() = line;
        }
    }
 
    Q_FOREACH (qreal line, m_d->verticalLines) {
        const qreal dist = qAbs(mousePosition.x() - line);
 
        if (dist < maxSnapDistance && dist < minXDistance) {
            minXDistance = dist;
            snappedPoint.rx() = line;
        }
    }
 
    if (kisDistance(snappedPoint, mousePosition) > maxSnapDistance) {
        if (minXDistance < minYDistance) {
            snappedPoint.ry() = mousePosition.y();
        } else {
            snappedPoint.rx() = mousePosition.x();
        }
    }
 
    const SnapType snapType = minXDistance < std::numeric_limits<qreal>::max() &&
            minYDistance < std::numeric_limits<qreal>::max() ? ToPoint : ToLine;
 
    setSnappedPosition(snappedPoint, snapType);
    return
        minXDistance < std::numeric_limits<qreal>::max() ||
        minYDistance < std::numeric_limits<qreal>::max();
}

References kisDistance(), m_d, KoSnapStrategy::setSnappedPosition(), KoSnapStrategy::ToLine, and KoSnapStrategy::ToPoint.

Member Data Documentation

m_d

const QScopedPointer<Private> KisSnapLineStrategy::m_d

private

Definition at line 31 of file kis_snap_line_strategy.h.

---

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

• libs/ui/canvas/kis_snap_line_strategy.h
• libs/ui/canvas/kis_snap_line_strategy.cpp