KisFreeTransformStrategy Class Reference

#include <kis_free_transform_strategy.h>

Inheritance diagram for KisFreeTransformStrategy:

Classes
struct	Private

Signals
void	requestCanvasUpdate ()
void	requestConvexHullCalculation ()
void	requestImageRecalculation ()
void	requestResetRotationCenterButtons ()
void	requestShowImageTooBig (bool value)

Public Member Functions
bool	beginPrimaryAction (const QPointF &pt) override
virtual bool	beginPrimaryAction (KoPointerEvent *event)=0
void	continuePrimaryAction (const QPointF &pt, bool shiftModifierActive, bool altModifierActive) override
virtual void	continuePrimaryAction (KoPointerEvent *event)=0
bool	endPrimaryAction () override
virtual bool	endPrimaryAction (KoPointerEvent *event)=0
void	externalConfigChanged () override
QCursor	getCurrentCursor () const override
	KisFreeTransformStrategy (const KisCoordinatesConverter *converter, KoSnapGuide *snapGuide, ToolTransformArgs &currentArgs, TransformTransactionProperties &transaction)
void	paint (QPainter &gc) override
void	setTransformFunction (const QPointF &mousePos, bool perspectiveModifierActive, bool shiftModifierActive, bool altModifierActive) override
bool	shiftModifierIsUsed () const override
	~KisFreeTransformStrategy () override
Public Member Functions inherited from KisSimplifiedActionPolicyStrategy
void	activateAlternateAction (KisTool::AlternateAction action) override
void	activatePrimaryAction () override
bool	beginAlternateAction (KoPointerEvent *event, KisTool::AlternateAction action) override
bool	beginPrimaryAction (KoPointerEvent *event) override
void	continueAlternateAction (KoPointerEvent *event, KisTool::AlternateAction action) override
void	continuePrimaryAction (KoPointerEvent *event) override
void	deactivateAlternateAction (KisTool::AlternateAction action) override
bool	endAlternateAction (KoPointerEvent *event, KisTool::AlternateAction action) override
bool	endPrimaryAction (KoPointerEvent *event) override
virtual QPointF	handleSnapPoint (const QPointF &imagePos)
void	hoverActionCommon (KoPointerEvent *event) override
	KisSimplifiedActionPolicyStrategy (const KisCoordinatesConverter *_converter, KoSnapGuide *snapGuide=0)
	~KisSimplifiedActionPolicyStrategy () override
Public Member Functions inherited from KisTransformStrategyBase
virtual bool	acceptsClicks () const
virtual void	deactivatePrimaryAction ()
virtual int	decorationThickness () const
virtual QPainterPath	getCursorOutline () const
	KisTransformStrategyBase ()
QImage	originalImage () const
virtual void	setDecorationThickness (int thickness)
void	setThumbnailImage (const QImage &image, QTransform thumbToImageTransform)
QTransform	thumbToImageTransform () const
	~KisTransformStrategyBase () override

Private Attributes
const QScopedPointer< Private >	m_d

Additional Inherited Members
Protected Member Functions inherited from KisSimplifiedActionPolicyStrategy
virtual void	hoverActionCommon (const QPointF &pt)

Detailed Description

Definition at line 22 of file kis_free_transform_strategy.h.

Constructor & Destructor Documentation

KisFreeTransformStrategy()

KisFreeTransformStrategy::KisFreeTransformStrategy	(	const KisCoordinatesConverter *	converter,
		KoSnapGuide *	snapGuide,
		ToolTransformArgs &	currentArgs,
		TransformTransactionProperties &	transaction )

Definition at line 137 of file kis_free_transform_strategy.cpp.

    : KisSimplifiedActionPolicyStrategy(converter, snapGuide),
      m_d(new Private(this, converter, currentArgs, transaction))
{
}

~KisFreeTransformStrategy()

KisFreeTransformStrategy::~KisFreeTransformStrategy ( )

override

Definition at line 146 of file kis_free_transform_strategy.cpp.

{
}

Member Function Documentation

beginPrimaryAction() [1/2]

bool KisFreeTransformStrategy::beginPrimaryAction ( const QPointF & pt )

overridevirtual

Implements KisSimplifiedActionPolicyStrategy.

Definition at line 434 of file kis_free_transform_strategy.cpp.

{
    m_d->clickArgs = m_d->currentArgs;
    m_d->clickPos = pt;
 
    KisTransformUtils::MatricesPack m(m_d->clickArgs);
    m_d->clickTransform = m.finalTransform();
 
    if (m_d->function == ROTATEBOUNDS) {
        Q_EMIT requestConvexHullCalculation();
    }
 
    return true;
}

References KisTransformUtils::MatricesPack::finalTransform(), m_d, and requestConvexHullCalculation().

beginPrimaryAction() [2/2]

virtual bool KisTransformStrategyBase::beginPrimaryAction ( KoPointerEvent * event )

virtual

Implements KisTransformStrategyBase.

continuePrimaryAction() [1/2]

void KisFreeTransformStrategy::continuePrimaryAction ( const QPointF & pt, bool shiftModifierActive, bool altModifierActive )

overridevirtual

We use determinant of clickM.SC instead of clickT to be able to catch the case when the image is flipped by 0x or 0y perspective rotations.

Implements KisSimplifiedActionPolicyStrategy.

Definition at line 449 of file kis_free_transform_strategy.cpp.

{
    // Note: "shiftModifierActive" just tells us if the shift key is being pressed
    // Note: "altModifierActive" just tells us if the alt key is being pressed
 
    m_d->isTransforming = true;
    const QPointF anchorPoint = m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset();
 
    switch (m_d->function) {
    case MOVE: {
        QPointF diff = mousePos - m_d->clickPos;
 
        if (shiftModifierActive) {
 
            KisTransformUtils::MatricesPack m(m_d->clickArgs);
            QTransform t = m.S * m.projectedP;
            QPointF originalDiff = t.inverted().map(diff);
 
            if (qAbs(originalDiff.x()) >= qAbs(originalDiff.y())) {
                originalDiff.setY(0);
            } else {
                originalDiff.setX(0);
            }
 
            diff = t.map(originalDiff);
 
        }
 
        m_d->currentArgs.setTransformedCenter(m_d->clickArgs.transformedCenter() + diff);
 
        break;
    }
    case ROTATEBOUNDS:
    {
        const KisTransformUtils::MatricesPack clickM(m_d->clickArgs);
        const QTransform clickT = clickM.finalTransform();
 
        const QPointF rotationCenter = m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset();
        const QPointF clickMouseImagePos = clickT.inverted().map(m_d->clickPos) - rotationCenter;
        const QPointF mouseImagePosClickSpace = clickT.inverted().map(mousePos) - rotationCenter;
 
        const qreal a1 = atan2(clickMouseImagePos.y(), clickMouseImagePos.x());
        const qreal a2 = atan2(mouseImagePosClickSpace.y(), mouseImagePosClickSpace.x());
 
        const qreal theta = a2 - a1;
        m_d->currentArgs.setBoundsRotation(m_d->clickArgs.boundsRotation() + theta);
        
        // Find new scale/shear/rotation for the rotated bounds
        QTransform newBR; newBR.rotateRadians(m_d->currentArgs.boundsRotation());
        QTransform clickZ; clickZ.rotateRadians(m_d->clickArgs.aZ());
        // newM.BRI * newM.SC * newM.S * newZ = clickM.BRI * clickM.SC * clickM.S * clickZ
        // newM.SC * newM.S * newZ = newM.BR * clickM.BRI * clickM.SC * clickM.S * clickZ
        QTransform desired = newBR * clickM.BRI * clickM.SC * clickM.S * clickZ;
        KisAlgebra2D::DecomposedMatrix dm(desired);
        if (dm.isValid()) {
            m_d->currentArgs.setScaleX(dm.scaleX);
            m_d->currentArgs.setScaleY(dm.scaleY);
            m_d->currentArgs.setShearX(dm.shearXY);
            m_d->currentArgs.setShearY(0);
            m_d->currentArgs.setAZ(kisDegreesToRadians(dm.angle));
        }
 
        // Snap with shift key
        // if (shiftModifierActive) {
        //     const qreal angle = m_d->currentArgs.boundsRotation();
        //     const qreal snapAngle = M_PI_4 / 6.0; // 7.5 degrees
        //     qint32 angleIndex = static_cast<qint32>((angle / snapAngle) + 0.5);
        //     m_d->currentArgs.setBoundsRotation(angleIndex * snapAngle);
        // }
    }
    break;
    case ROTATE:
    {
        const KisTransformUtils::MatricesPack clickM(m_d->clickArgs);
        const QTransform clickT = clickM.finalTransform();
 
        const QPointF rotationCenter = m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset();
        const QPointF clickMouseImagePos = clickT.inverted().map(m_d->clickPos) - rotationCenter;
        const QPointF mouseImagePosClickSpace = clickT.inverted().map(mousePos) - rotationCenter;
 
        const qreal a1 = atan2(clickMouseImagePos.y(), clickMouseImagePos.x());
        const qreal a2 = atan2(mouseImagePosClickSpace.y(), mouseImagePosClickSpace.x());
 
        const qreal theta = KisAlgebra2D::signZZ(clickM.SC.determinant()) * (a2 - a1);
 
        // Snap with shift key
        if (shiftModifierActive) {
            const qreal snapAngle = M_PI_4 / 6.0; // 7.5 degrees
            qint32 thetaIndex = static_cast<qint32>((theta / snapAngle) + 0.5);
            m_d->currentArgs.setAZ(thetaIndex * snapAngle);
        }
        else {
            const qreal clickAngle = m_d->clickArgs.aZ();
            const qreal targetAngle = m_d->clickArgs.aZ() + theta;
            qreal shortestDistance = shortestAngularDistance(clickAngle, targetAngle);
            const bool clockwise =  (theta <= M_PI && theta >= 0) || (theta < -M_PI);
            shortestDistance = clockwise ? shortestDistance : shortestDistance * -1;
 
            m_d->currentArgs.setAZ(m_d->clickArgs.aZ() + shortestDistance);
        }
 
        KisTransformUtils::MatricesPack m(m_d->currentArgs);
        QTransform t = m.finalTransform();
        QPointF newRotationCenter = t.map(m_d->currentArgs.originalCenter() + m_d->currentArgs.rotationCenterOffset());
        QPointF oldRotationCenter = clickT.map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
 
        m_d->currentArgs.setTransformedCenter(m_d->currentArgs.transformedCenter() + oldRotationCenter - newRotationCenter);
    }
    break;
    case PERSPECTIVE:
    {
        QPointF diff = mousePos - m_d->clickPos;
        double thetaX = - diff.y() * M_PI / m_d->transaction.originalHalfHeight() / 2 / fabs(m_d->currentArgs.scaleY());
        m_d->currentArgs.setAX(normalizeAngle(m_d->clickArgs.aX() + thetaX));
 
        qreal sign = qAbs(m_d->currentArgs.aX() - M_PI) < M_PI / 2 ? -1.0 : 1.0;
        double thetaY = sign * diff.x() * M_PI / m_d->transaction.originalHalfWidth() / 2 / fabs(m_d->currentArgs.scaleX());
        m_d->currentArgs.setAY(normalizeAngle(m_d->clickArgs.aY() + thetaY));
 
        KisTransformUtils::MatricesPack m(m_d->currentArgs);
        QTransform t = m.finalTransform();
        QPointF newRotationCenter = t.map(m_d->currentArgs.originalCenter() + m_d->currentArgs.rotationCenterOffset());
 
        KisTransformUtils::MatricesPack clickM(m_d->clickArgs);
        QTransform clickT = clickM.finalTransform();
        QPointF oldRotationCenter = clickT.map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
 
        m_d->currentArgs.setTransformedCenter(m_d->currentArgs.transformedCenter() + oldRotationCenter - newRotationCenter);
    }
    break;
    case TOPSCALE:
    case BOTTOMSCALE: {
        QPointF staticPoint;
        QPointF movingPoint;
 
        if (m_d->function == TOPSCALE) {
            staticPoint = m_d->boundsTransform.map(bottomMiddle(m_d->bounds));
            movingPoint = m_d->boundsTransform.map(topMiddle(m_d->bounds));
        } else {
            staticPoint = m_d->boundsTransform.map(topMiddle(m_d->bounds));
            movingPoint = m_d->boundsTransform.map(bottomMiddle(m_d->bounds));
        }
 
        QPointF staticPointInView = m_d->clickTransform.map(staticPoint);
        const QPointF movingPointInView = m_d->clickTransform.map(movingPoint);
 
        const QPointF projNormVector =
            KisAlgebra2D::normalize(movingPointInView - staticPointInView);
 
        const qreal projLength =
            KisAlgebra2D::dotProduct(mousePos - staticPointInView, projNormVector);
 
        const QPointF targetMovingPointInView = staticPointInView + projNormVector * projLength;
 
        // override scale static point if it is locked
        if ((m_d->clickArgs.transformAroundRotationCenter() ^ altModifierActive) &&
            !qFuzzyCompare(anchorPoint.y(), movingPoint.y())) {
 
            staticPoint = anchorPoint;
            staticPointInView = m_d->clickTransform.map(staticPoint);
        }
 
        GSL::ScaleResult1D result =
            GSL::calculateScaleY(m_d->currentArgs,
                                 staticPoint,
                                 staticPointInView,
                                 movingPoint,
                                 targetMovingPointInView);
 
        if (!result.isValid) {
            break;
        }
 
        if (shiftModifierActive ||  m_d->currentArgs.keepAspectRatio()) {
            qreal aspectRatio = m_d->clickArgs.scaleX() / m_d->clickArgs.scaleY();
            m_d->currentArgs.setScaleX(aspectRatio * result.scale);
        }
 
        m_d->currentArgs.setScaleY(result.scale);
        m_d->currentArgs.setTransformedCenter(result.transformedCenter);
        break;
    }
 
    case LEFTSCALE:
    case RIGHTSCALE: {
        QPointF staticPoint;
        QPointF movingPoint;
 
        if (m_d->function == LEFTSCALE) {
            staticPoint = m_d->boundsTransform.map(middleRight(m_d->bounds));
            movingPoint = m_d->boundsTransform.map(middleLeft(m_d->bounds));
        } else {
            staticPoint = m_d->boundsTransform.map(middleLeft(m_d->bounds));
            movingPoint = m_d->boundsTransform.map(middleRight(m_d->bounds));
        }
 
        QPointF staticPointInView = m_d->clickTransform.map(staticPoint);
        const QPointF movingPointInView = m_d->clickTransform.map(movingPoint);
 
        const QPointF projNormVector =
            KisAlgebra2D::normalize(movingPointInView - staticPointInView);
 
        const qreal projLength =
            KisAlgebra2D::dotProduct(mousePos - staticPointInView, projNormVector);
 
        const QPointF targetMovingPointInView = staticPointInView + projNormVector * projLength;
 
        // override scale static point if it is locked
        if ((m_d->currentArgs.transformAroundRotationCenter() ^ altModifierActive) &&
            !qFuzzyCompare(anchorPoint.x(), movingPoint.x())) {
 
            staticPoint = anchorPoint;
            staticPointInView = m_d->clickTransform.map(staticPoint);
        }
 
        GSL::ScaleResult1D result =
            GSL::calculateScaleX(m_d->currentArgs,
                                 staticPoint,
                                 staticPointInView,
                                 movingPoint,
                                 targetMovingPointInView);
 
        if (!result.isValid) {
            break;
        }
 
        if (shiftModifierActive  ||  m_d->currentArgs.keepAspectRatio()) {
            qreal aspectRatio = m_d->clickArgs.scaleY() / m_d->clickArgs.scaleX();
            m_d->currentArgs.setScaleY(aspectRatio * result.scale);
        }
 
        m_d->currentArgs.setScaleX(result.scale);
        m_d->currentArgs.setTransformedCenter(result.transformedCenter);
        break;
    }
    case TOPRIGHTSCALE:
    case BOTTOMRIGHTSCALE:
    case TOPLEFTSCALE:
    case BOTTOMLEFTSCALE: {
        QPointF staticPoint;
        QPointF movingPoint;
 
        if (m_d->function == TOPRIGHTSCALE) {
            staticPoint = m_d->boundsTransform.map(m_d->bounds.bottomLeft());
            movingPoint = m_d->boundsTransform.map(m_d->bounds.topRight());
        } else if (m_d->function == BOTTOMRIGHTSCALE) {
            staticPoint = m_d->boundsTransform.map(m_d->bounds.topLeft());
            movingPoint = m_d->boundsTransform.map(m_d->bounds.bottomRight());
        } else if (m_d->function == TOPLEFTSCALE) {
            staticPoint = m_d->boundsTransform.map(m_d->bounds.bottomRight());
            movingPoint = m_d->boundsTransform.map(m_d->bounds.topLeft());
        } else {
            staticPoint = m_d->boundsTransform.map(m_d->bounds.topRight());
            movingPoint = m_d->boundsTransform.map(m_d->bounds.bottomLeft());
        }
 
        // override scale static point if it is locked
        if ((m_d->currentArgs.transformAroundRotationCenter() ^ altModifierActive) &&
            !(qFuzzyCompare(anchorPoint.x(), movingPoint.x()) ||
              qFuzzyCompare(anchorPoint.y(), movingPoint.y()))) {
 
            staticPoint = anchorPoint;
        }
 
        QPointF staticPointInView = m_d->clickTransform.map(staticPoint);
        QPointF movingPointInView = mousePos;
 
        if (shiftModifierActive  ||  m_d->currentArgs.keepAspectRatio()) {
            QPointF refDiff = m_d->clickTransform.map(movingPoint) - staticPointInView;
            QPointF realDiff = mousePos - staticPointInView;
            realDiff = kisProjectOnVector(refDiff, realDiff);
 
            movingPointInView = staticPointInView + realDiff;
        }
 
        const bool isAffine =
            qFuzzyIsNull(m_d->currentArgs.aX()) &&
            qFuzzyIsNull(m_d->currentArgs.aY());
 
        GSL::ScaleResult2D result =
                !isAffine ?
                    GSL::calculateScale2D(m_d->currentArgs,
                                          staticPoint,
                                          staticPointInView,
                                          movingPoint,
                                          movingPointInView) :
                    GSL::calculateScale2DAffine(m_d->currentArgs,
                                                staticPoint,
                                                staticPointInView,
                                                movingPoint,
                                                movingPointInView);
 
        if (result.isValid) {
            m_d->currentArgs.setScaleX(result.scaleX);
            m_d->currentArgs.setScaleY(result.scaleY);
            m_d->currentArgs.setTransformedCenter(result.transformedCenter);
        }
 
        break;
    }
    case MOVECENTER: {
 
        QPointF pt;
        if (altModifierActive) {
            pt = (m_d->boundsTransform * m_d->transform).inverted().map(mousePos);
            pt = KisTransformUtils::clipInRect(pt, m_d->bounds);
            pt = m_d->boundsTransform.map(pt);
        } else {
            pt = m_d->transform.inverted().map(mousePos);
        }
 
        QPointF newRotationCenterOffset = pt - m_d->currentArgs.originalCenter();
 
        if (shiftModifierActive) {
            if (qAbs(newRotationCenterOffset.x()) > qAbs(newRotationCenterOffset.y())) {
                newRotationCenterOffset.ry() = 0;
            } else {
                newRotationCenterOffset.rx() = 0;
            }
        }
 
        m_d->currentArgs.setRotationCenterOffset(newRotationCenterOffset);
        Q_EMIT requestResetRotationCenterButtons();
    }
        break;
    case TOPSHEAR:
    case BOTTOMSHEAR: {
        KisTransformUtils::MatricesPack m(m_d->clickArgs);
 
        QPointF oldStaticPoint = m.finalTransform().map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
 
        QTransform backwardT = (m.S * m.projectedP).inverted();
        QPointF diff = backwardT.map(mousePos - m_d->clickPos);
 
        qreal sign = m_d->function == BOTTOMSHEAR ? 1.0 : -1.0;
 
        // get the dx pixels corresponding to the current shearX factor
        qreal dx = sign * m_d->clickArgs.shearX() * m_d->clickArgs.scaleY() * (m_d->bounds.height() / 2.0); // get the dx pixels corresponding to the current shearX factor
        dx += diff.x();
 
        // calculate the new shearX factor
        m_d->currentArgs.setShearX(sign * dx / m_d->currentArgs.scaleY() / (m_d->bounds.height() / 2.0)); // calculate the new shearX factor
 
        KisTransformUtils::MatricesPack currentM(m_d->currentArgs);
        QTransform t = currentM.finalTransform();
        QPointF newStaticPoint = t.map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
        m_d->currentArgs.setTransformedCenter(m_d->currentArgs.transformedCenter() + oldStaticPoint - newStaticPoint);
        break;
    }
 
    case LEFTSHEAR:
    case RIGHTSHEAR: {
        KisTransformUtils::MatricesPack m(m_d->clickArgs);
 
        QPointF oldStaticPoint = m.finalTransform().map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
 
        QTransform backwardT = (m.S * m.projectedP).inverted();
        QPointF diff = backwardT.map(mousePos - m_d->clickPos);
 
        qreal sign = m_d->function == RIGHTSHEAR ? 1.0 : -1.0;
 
        // get the dx pixels corresponding to the current shearX factor
        qreal dy = sign *  m_d->clickArgs.shearY() * m_d->clickArgs.scaleX() * (m_d->bounds.width() / 2.0);
        dy += diff.y();
 
        // calculate the new shearY factor
        m_d->currentArgs.setShearY(sign * dy / m_d->clickArgs.scaleX() / (m_d->bounds.width() / 2.0));
 
        KisTransformUtils::MatricesPack currentM(m_d->currentArgs);
        QTransform t = currentM.finalTransform();
        QPointF newStaticPoint = t.map(m_d->clickArgs.originalCenter() + m_d->clickArgs.rotationCenterOffset());
        m_d->currentArgs.setTransformedCenter(m_d->currentArgs.transformedCenter() + oldStaticPoint - newStaticPoint);
        break;
    }
    }
 
    m_d->recalculateTransformations();
}

References KisAlgebra2D::DecomposedMatrix::angle, KisTransformUtils::MatricesPack::BRI, GSL::calculateScale2D(), GSL::calculateScale2DAffine(), GSL::calculateScaleX(), GSL::calculateScaleY(), KisTransformUtils::clipInRect(), KisAlgebra2D::dotProduct(), KisTransformUtils::MatricesPack::finalTransform(), KisAlgebra2D::DecomposedMatrix::isValid(), GSL::ScaleResult1D::isValid, GSL::ScaleResult2D::isValid, kisDegreesToRadians(), kisProjectOnVector(), m_d, M_PI, MOVE, KisAlgebra2D::normalize(), normalizeAngle(), KisTransformUtils::MatricesPack::projectedP, qFuzzyIsNull(), requestResetRotationCenterButtons(), KisTransformUtils::MatricesPack::S, KisTransformUtils::MatricesPack::SC, GSL::ScaleResult1D::scale, KisAlgebra2D::DecomposedMatrix::scaleX, GSL::ScaleResult2D::scaleX, KisAlgebra2D::DecomposedMatrix::scaleY, GSL::ScaleResult2D::scaleY, KisAlgebra2D::DecomposedMatrix::shearXY, shortestAngularDistance(), sign(), KisAlgebra2D::signZZ(), GSL::ScaleResult1D::transformedCenter, and GSL::ScaleResult2D::transformedCenter.

continuePrimaryAction() [2/2]

virtual void KisTransformStrategyBase::continuePrimaryAction ( KoPointerEvent * event )

virtual

Implements KisTransformStrategyBase.

endPrimaryAction() [1/2]

bool KisFreeTransformStrategy::endPrimaryAction ( )

overridevirtual

Implements KisSimplifiedActionPolicyStrategy.

Definition at line 834 of file kis_free_transform_strategy.cpp.

{
    bool shouldSave = !m_d->imageTooBig;
    m_d->isTransforming = false;
 
    if (m_d->imageTooBig) {
        m_d->currentArgs = m_d->clickArgs;
        m_d->recalculateTransformations();
    }
 
    return shouldSave;
}

References m_d.

endPrimaryAction() [2/2]

virtual bool KisTransformStrategyBase::endPrimaryAction ( KoPointerEvent * event )

virtual

Implements KisTransformStrategyBase.

externalConfigChanged()

void KisFreeTransformStrategy::externalConfigChanged ( )

overridevirtual

Implements KisTransformStrategyBase.

Definition at line 429 of file kis_free_transform_strategy.cpp.

{
    m_d->recalculateTransformations();
}

References m_d.

getCurrentCursor()

QCursor KisFreeTransformStrategy::getCurrentCursor ( ) const

overridevirtual

Implements KisTransformStrategyBase.

Definition at line 291 of file kis_free_transform_strategy.cpp.

{
    QCursor cursor;
 
    switch (m_d->function) {
    case MOVE:
        cursor = KisCursor::moveCursor();
        break;
    case ROTATEBOUNDS:
        cursor = m_d->rotateHandlesCursor;
        break;
    case ROTATE:
        cursor = KisCursor::rotateCursor();
        break;
    case PERSPECTIVE:
        //TODO: find another cursor for perspective
        cursor = KisCursor::rotateCursor();
        break;
    case RIGHTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.middleRight);
        break;
    case TOPSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.topMiddle);
        break;
    case LEFTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.middleLeft);
        break;
    case BOTTOMSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.bottomMiddle);
        break;
    case TOPRIGHTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.topRight);
        break;
    case BOTTOMLEFTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.bottomLeft);
        break;
    case TOPLEFTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.topLeft);
        break;
    case BOTTOMRIGHTSCALE:
        cursor = m_d->getScaleCursor(m_d->transformedHandles.bottomRight);
        break;
    case MOVECENTER:
        cursor = KisCursor::handCursor();
        break;
    case BOTTOMSHEAR:
        cursor = m_d->getShearCursor(m_d->transformedHandles.bottomLeft, m_d->transformedHandles.bottomRight);
        break;
    case RIGHTSHEAR:
        cursor = m_d->getShearCursor(m_d->transformedHandles.bottomRight, m_d->transformedHandles.topRight);
        break;
    case TOPSHEAR:
        cursor = m_d->getShearCursor(m_d->transformedHandles.topRight, m_d->transformedHandles.topLeft);
        break;
    case LEFTSHEAR:
        cursor = m_d->getShearCursor(m_d->transformedHandles.topLeft, m_d->transformedHandles.bottomLeft);
        break;
    }
 
    return cursor;
}

References KisCursor::handCursor(), m_d, MOVE, KisCursor::moveCursor(), and KisCursor::rotateCursor().

paint()

void KisFreeTransformStrategy::paint ( QPainter & gc )

overridevirtual

Implements KisTransformStrategyBase.

Definition at line 353 of file kis_free_transform_strategy.cpp.

{
    gc.save();
 
    gc.setOpacity(m_d->transaction.basePreviewOpacity());
    gc.setTransform(m_d->paintingTransform, true);
    gc.drawImage(m_d->paintingOffset, originalImage());
 
    gc.restore();
 
    // Draw Handles
 
    QRectF handleRect =
        KisTransformUtils::handleRect(KisTransformUtils::handleVisualRadius,
                                      m_d->handlesTransform,
                                      m_d->bounds, 0, 0);
 
    qreal rX = 1;
    qreal rY = 1;
    QRectF rotationCenterRect =
        KisTransformUtils::handleRect(KisTransformUtils::rotationHandleVisualRadius,
                                      m_d->handlesTransform,
                                      m_d->bounds,
                                      &rX,
                                      &rY);
 
    QPainterPath handles;
 
    handles.moveTo(m_d->bounds.topLeft());
    handles.lineTo(m_d->bounds.topRight());
    handles.lineTo(m_d->bounds.bottomRight());
    handles.lineTo(m_d->bounds.bottomLeft());
    handles.lineTo(m_d->bounds.topLeft());
 
    handles.addRect(handleRect.translated(m_d->bounds.topLeft()));
    handles.addRect(handleRect.translated(m_d->bounds.topRight()));
    handles.addRect(handleRect.translated(m_d->bounds.bottomLeft()));
    handles.addRect(handleRect.translated(m_d->bounds.bottomRight()));
    handles.addRect(handleRect.translated(middleLeft(m_d->bounds)));
    handles.addRect(handleRect.translated(middleRight(m_d->bounds)));
    handles.addRect(handleRect.translated(topMiddle(m_d->bounds)));
    handles.addRect(handleRect.translated(bottomMiddle(m_d->bounds)));
 
    QPointF rotationCenter = m_d->boundsTransform.inverted().map(m_d->currentArgs.originalCenter() + m_d->currentArgs.rotationCenterOffset());
    QPointF dx(rX + 3, 0);
    QPointF dy(0, rY + 3);
    handles.addEllipse(rotationCenterRect.translated(rotationCenter));
    handles.moveTo(rotationCenter - dx);
    handles.lineTo(rotationCenter + dx);
    handles.moveTo(rotationCenter - dy);
    handles.lineTo(rotationCenter + dy);
 
    gc.save();
 
    if (m_d->isTransforming) {
        gc.setOpacity(0.1);
    }
 
    //gc.setTransform(m_d->handlesTransform, true); <-- don't do like this!
    QPainterPath mappedHandles = m_d->handlesTransform.map(handles);
 
    QPen pen[2];
    pen[0].setWidth(decorationThickness());
    pen[0].setCosmetic(true);
    pen[1].setWidth(decorationThickness() * 2);
    pen[1].setCosmetic(true);
    pen[1].setColor(Qt::lightGray);
 
    for (int i = 1; i >= 0; --i) {
        gc.setPen(pen[i]);
        gc.drawPath(mappedHandles);
    }
 
    gc.restore();
}

References KisTransformStrategyBase::decorationThickness(), KisTransformUtils::handleRect(), KisTransformUtils::handleVisualRadius, m_d, KisTransformStrategyBase::originalImage(), and KisTransformUtils::rotationHandleVisualRadius.

requestCanvasUpdate

void KisFreeTransformStrategy::requestCanvasUpdate ( )

signal

requestConvexHullCalculation

void KisFreeTransformStrategy::requestConvexHullCalculation ( )

signal

requestImageRecalculation

void KisFreeTransformStrategy::requestImageRecalculation ( )

signal

requestResetRotationCenterButtons

void KisFreeTransformStrategy::requestResetRotationCenterButtons ( )

signal

requestShowImageTooBig

void KisFreeTransformStrategy::requestShowImageTooBig ( bool value )

signal

setTransformFunction()

void KisFreeTransformStrategy::setTransformFunction ( const QPointF & mousePos, bool perspectiveModifierActive, bool shiftModifierActive, bool altModifierActive )

overridevirtual

Implements KisSimplifiedActionPolicyStrategy.

Definition at line 197 of file kis_free_transform_strategy.cpp.

{
    Q_UNUSED(shiftModifierActive);
 
    if (perspectiveModifierActive && !m_d->transaction.shouldAvoidPerspectiveTransform()) {
        m_d->function = PERSPECTIVE;
        return;
    }
 
    QTransform boundsFullTransform = m_d->boundsTransform * m_d->transform;
    QPolygonF transformedPolygon = boundsFullTransform.map(QPolygonF(m_d->bounds));
    qreal handleRadius = KisTransformUtils::effectiveHandleGrabRadius(m_d->converter);
    qreal rotationHandleRadius = KisTransformUtils::effectiveHandleGrabRadius(m_d->converter);
 
 
    StrokeFunction defaultFunction;
    if (transformedPolygon.containsPoint(mousePos, Qt::OddEvenFill))
        defaultFunction = MOVE;
    else if (m_d->transaction.boundsRotationAllowed() && altModifierActive)
        defaultFunction = ROTATEBOUNDS;
    else
        defaultFunction = ROTATE;
    KisTransformUtils::HandleChooser<StrokeFunction>
        handleChooser(mousePos, defaultFunction);
 
    handleChooser.addFunction(m_d->transformedHandles.topMiddle,
                              handleRadius, TOPSCALE);
    handleChooser.addFunction(m_d->transformedHandles.topRight,
                              handleRadius, TOPRIGHTSCALE);
    handleChooser.addFunction(m_d->transformedHandles.middleRight,
                              handleRadius, RIGHTSCALE);
 
    handleChooser.addFunction(m_d->transformedHandles.bottomRight,
                              handleRadius, BOTTOMRIGHTSCALE);
    handleChooser.addFunction(m_d->transformedHandles.bottomMiddle,
                              handleRadius, BOTTOMSCALE);
    handleChooser.addFunction(m_d->transformedHandles.bottomLeft,
                              handleRadius, BOTTOMLEFTSCALE);
    handleChooser.addFunction(m_d->transformedHandles.middleLeft,
                              handleRadius, LEFTSCALE);
    handleChooser.addFunction(m_d->transformedHandles.topLeft,
                              handleRadius, TOPLEFTSCALE);
    handleChooser.addFunction(m_d->transformedHandles.rotationCenter,
                              rotationHandleRadius, MOVECENTER);
 
    m_d->function = handleChooser.function();
 
    if (m_d->function == ROTATE || m_d->function == MOVE) {
        QRectF bounds = m_d->bounds;
        QPointF t = boundsFullTransform.inverted().map(mousePos);
 
        if (t.x() >= bounds.left() && t.x() <= bounds.right()) {
            if (fabs(t.y() - bounds.top()) <= handleRadius)
                m_d->function = TOPSHEAR;
            if (fabs(t.y() - bounds.bottom()) <= handleRadius)
                m_d->function = BOTTOMSHEAR;
        }
        if (t.y() >= bounds.top() && t.y() <= bounds.bottom()) {
            if (fabs(t.x() - bounds.left()) <= handleRadius)
                m_d->function = LEFTSHEAR;
            if (fabs(t.x() - bounds.right()) <= handleRadius)
                m_d->function = RIGHTSHEAR;
        }
    }
}

References KisTransformUtils::HandleChooser< Function >::addFunction(), bounds, KisTransformUtils::effectiveHandleGrabRadius(), KisTransformUtils::HandleChooser< Function >::function(), m_d, and MOVE.

shiftModifierIsUsed()

bool KisFreeTransformStrategy::shiftModifierIsUsed ( ) const

overridevirtual

Reimplemented from KisSimplifiedActionPolicyStrategy.

Definition at line 263 of file kis_free_transform_strategy.cpp.

{
    return true;
}

Member Data Documentation

m_d

const QScopedPointer<Private> KisFreeTransformStrategy::m_d

private

Definition at line 57 of file kis_free_transform_strategy.h.

---

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

• plugins/tools/tool_transform2/kis_free_transform_strategy.h
• plugins/tools/tool_transform2/kis_free_transform_strategy.cpp