KoPathControlPointMoveCommand Class Reference

The undo / redo command for path point moving. More...

#include <KoPathControlPointMoveCommand.h>

Inheritance diagram for KoPathControlPointMoveCommand:

Public Member Functions
int	id () const override
	KoPathControlPointMoveCommand (const KoPathPointData &pointData, const QPointF &offset, KoPathPoint::PointType pointType, KUndo2Command *parent=0)
bool	mergeWith (const KUndo2Command *command) override
void	redo () override
	redo the command
void	undo () override
	revert the actions done in redo
Public Member Functions inherited from KUndo2Command
QString	actionText () const
virtual bool	canAnnihilateWith (const KUndo2Command *other) const
const KUndo2Command *	child (int index) const
int	childCount () const
virtual QTime	endTime () const
KUndo2CommandExtraData *	extraData () const
bool	hasParent () const
virtual bool	isMerged () const
	KUndo2Command (const KUndo2MagicString &text, KUndo2Command *parent=0)
	KUndo2Command (KUndo2Command *parent=0)
virtual QVector< KUndo2Command * >	mergeCommandsVector () const
virtual void	redoMergedCommands ()
void	setEndTime ()
virtual void	setEndTime (const QTime &time)
void	setExtraData (KUndo2CommandExtraData *data)
void	setText (const KUndo2MagicString &text)
void	setTime ()
virtual void	setTime (const QTime &time)
virtual void	setTimedID (int timedID)
KUndo2MagicString	text () const
virtual QTime	time () const
virtual int	timedId () const
virtual bool	timedMergeWith (KUndo2Command *other)
virtual void	undoMergedCommands ()
virtual	~KUndo2Command ()

Private Attributes
QPointF	m_offset
KoPathPointData	m_pointData
KoPathPoint::PointType	m_pointType

Detailed Description

The undo / redo command for path point moving.

Definition at line 19 of file KoPathControlPointMoveCommand.h.

Constructor & Destructor Documentation

KoPathControlPointMoveCommand()

KoPathControlPointMoveCommand::KoPathControlPointMoveCommand	(	const KoPathPointData &	pointData,
		const QPointF &	offset,
		KoPathPoint::PointType	pointType,
		KUndo2Command *	parent = 0 )

Command to move one control path point.

Parameters

pointData	the data of the point to move
offset	the offset by which the point is moved in shape coordinates
pointType	the type of the point to move
parent	the parent command used for macro commands

Definition at line 13 of file KoPathControlPointMoveCommand.cpp.

        : KUndo2Command(parent)
        , m_pointData(pointData)
        , m_pointType(pointType)
{
    Q_ASSERT(offset.x() < 1e14 && offset.y() < 1e14);
    KoPathShape * pathShape = m_pointData.pathShape;
    KoPathPoint * point = pathShape->pointByIndex(m_pointData.pointIndex);
    if (point) {
        m_offset = offset;
    }
 
    setText(kundo2_i18n("Move control point"));
}

References kundo2_i18n(), m_offset, m_pointData, KoPathPointData::pathShape, KoPathShape::pointByIndex(), KoPathPointData::pointIndex, and KUndo2Command::setText().

Member Function Documentation

id()

int KoPathControlPointMoveCommand::id ( ) const

overridevirtual

Returns the ID of this command.

A command ID is used in command compression. It must be an integer unique to this command's class, or -1 if the command doesn't support compression.

If the command supports compression this function must be overridden in the derived class to return the correct ID. The base implementation returns -1.

KUndo2QStack::push() will only try to merge two commands if they have the same ID, and the ID is not -1.

See also

mergeWith(), KUndo2QStack::push()

Reimplemented from KUndo2Command.

Definition at line 85 of file KoPathControlPointMoveCommand.cpp.

{
    return KisCommandUtils::ChangePathShapeControlPointId;
}

References KisCommandUtils::ChangePathShapeControlPointId.

mergeWith()

bool KoPathControlPointMoveCommand::mergeWith ( const KUndo2Command * command )

overridevirtual

Attempts to merge this command with command. Returns true on success; otherwise returns false.

If this function returns true, calling this command's redo() must have the same effect as redoing both this command and command. Similarly, calling this command's undo() must have the same effect as undoing command and this command.

KUndo2QStack will only try to merge two commands if they have the same id, and the id is not -1.

The default implementation returns false.

See also

id() KUndo2QStack::push()

Reimplemented from KUndo2Command.

Definition at line 90 of file KoPathControlPointMoveCommand.cpp.

{
    const KoPathControlPointMoveCommand *other = dynamic_cast<const KoPathControlPointMoveCommand*>(command);
 
    if (!other ||
        other->m_pointData != m_pointData ||
        other->m_pointType != m_pointType) {
 
        return false;
    }
 
    m_offset += other->m_offset;
 
    return true;
}

References m_offset, m_pointData, and m_pointType.

redo()

void KoPathControlPointMoveCommand::redo ( )

overridevirtual

redo the command

Reimplemented from KUndo2Command.

Definition at line 32 of file KoPathControlPointMoveCommand.cpp.

{
    KUndo2Command::redo();
    KoPathShape * pathShape = m_pointData.pathShape;
    KoPathPoint * point = pathShape->pointByIndex(m_pointData.pointIndex);
    if (point) {
        const QRectF oldDirtyRect = pathShape->boundingRect();
 
        if (m_pointType == KoPathPoint::ControlPoint1) {
            point->setControlPoint1(point->controlPoint1() + m_offset);
            if (point->properties() & KoPathPoint::IsSymmetric) {
                // set the other control point so that it lies on the line between the moved
                // control point and the point, with the same distance to the point as the moved point
                point->setControlPoint2(2.0 * point->point() - point->controlPoint1());
            } else if (point->properties() & KoPathPoint::IsSmooth) {
                // move the other control point so that it lies on the line through point and control point
                // keeping its distance to the point
                QPointF direction = point->point() - point->controlPoint1();
                direction /= sqrt(direction.x() * direction.x() + direction.y() * direction.y());
                QPointF distance = point->point() - point->controlPoint2();
                qreal length = sqrt(distance.x() * distance.x() + distance.y() * distance.y());
                point->setControlPoint2(point->point() + length * direction);
            }
        } else if (m_pointType == KoPathPoint::ControlPoint2) {
            point->setControlPoint2(point->controlPoint2() + m_offset);
            if (point->properties() & KoPathPoint::IsSymmetric) {
                // set the other control point so that it lies on the line between the moved
                // control point and the point, with the same distance to the point as the moved point
                point->setControlPoint1(2.0 * point->point() - point->controlPoint2());
            } else if (point->properties() & KoPathPoint::IsSmooth) {
                // move the other control point so that it lies on the line through point and control point
                // keeping its distance to the point
                QPointF direction = point->point() - point->controlPoint2();
                direction /= sqrt(direction.x() * direction.x() + direction.y() * direction.y());
                QPointF distance = point->point() - point->controlPoint1();
                qreal length = sqrt(distance.x() * distance.x() + distance.y() * distance.y());
                point->setControlPoint1(point->point() + length * direction);
            }
        }
 
        pathShape->normalize();
        pathShape->updateAbsolute(oldDirtyRect | pathShape->boundingRect());
    }
}

References KoPathShape::boundingRect(), KoPathPoint::controlPoint1, KoPathPoint::ControlPoint1, KoPathPoint::controlPoint2, KoPathPoint::ControlPoint2, distance(), KoPathPoint::IsSmooth, KoPathPoint::IsSymmetric, length(), m_offset, m_pointData, m_pointType, KoPathShape::normalize(), KoPathPointData::pathShape, KoPathPoint::point, KoPathShape::pointByIndex(), KoPathPointData::pointIndex, KoPathPoint::properties, KUndo2Command::redo(), KoPathPoint::setControlPoint1(), KoPathPoint::setControlPoint2(), and KoShape::updateAbsolute().

undo()

void KoPathControlPointMoveCommand::undo ( )

overridevirtual

revert the actions done in redo

Reimplemented from KUndo2Command.

Definition at line 77 of file KoPathControlPointMoveCommand.cpp.

{
    KUndo2Command::undo();
    m_offset *= -1.0;
    redo();
    m_offset *= -1.0;
}

References m_offset, redo(), and KUndo2Command::undo().

Member Data Documentation

m_offset

QPointF KoPathControlPointMoveCommand::m_offset

private

Definition at line 42 of file KoPathControlPointMoveCommand.h.

m_pointData

KoPathPointData KoPathControlPointMoveCommand::m_pointData

private

Definition at line 40 of file KoPathControlPointMoveCommand.h.

m_pointType

KoPathPoint::PointType KoPathControlPointMoveCommand::m_pointType

private

Definition at line 43 of file KoPathControlPointMoveCommand.h.

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

• libs/flake/commands/KoPathControlPointMoveCommand.h
• libs/flake/commands/KoPathControlPointMoveCommand.cpp