Classes
struct	Pair

Public Functions
void	insertUniquePair (qreal step, qreal value, QList< Pair > binList, const char method)

qreal	linearValueForStep (qreal step, QList< Pair > *source, qreal defaultValue=0)

	QGraphicsItemAnimationPrivate ()

Public Variables
QList< Pair >	horizontalScale

QList< Pair >	horizontalShear

QGraphicsItem *	item

QGraphicsItemAnimation *	q

QList< Pair >	rotation

QMatrix	startMatrix

QPointF	startPos

qreal	step

QPointer< QTimeLine >	timeLine

QList< Pair >	verticalScale

QList< Pair >	verticalShear

QList< Pair >	xPosition

QList< Pair >	xTranslation

QList< Pair >	yPosition

QList< Pair >	yTranslation

Detailed Description

Definition at line 100 of file qgraphicsitemanimation.cpp.

Constructors and Destructors

◆ QGraphicsItemAnimationPrivate()

QGraphicsItemAnimationPrivate::QGraphicsItemAnimationPrivate ( )

inline

Definition at line 103 of file qgraphicsitemanimation.cpp.

104 : q(0), timeLine(0), item(0), step(0)

105 { }

QGraphicsItemAnimationPrivate::step

qreal step

Definition: qgraphicsitemanimation.cpp:115

QGraphicsItemAnimationPrivate::q

QGraphicsItemAnimation * q

Definition: qgraphicsitemanimation.cpp:107

QGraphicsItemAnimationPrivate::timeLine

QPointer< QTimeLine > timeLine

Definition: qgraphicsitemanimation.cpp:109

QGraphicsItemAnimationPrivate::item

QGraphicsItem * item

Definition: qgraphicsitemanimation.cpp:110

Functions

◆ insertUniquePair()

void QGraphicsItemAnimationPrivate::insertUniquePair	(	qreal	step,
		qreal	value,
		QList< Pair > *	binList,
		const char *	method
	)

Definition at line 170 of file qgraphicsitemanimation.cpp.

Referenced by QGraphicsItemAnimation::setPosAt(), QGraphicsItemAnimation::setRotationAt(), QGraphicsItemAnimation::setScaleAt(), QGraphicsItemAnimation::setShearAt(), and QGraphicsItemAnimation::setTranslationAt().

 {
     if (step < 0.0 || step > 1.0) {
         qWarning("QGraphicsItemAnimation::%s: invalid step = %f", method, step);
         return;
     }
 
     Pair pair(step, value);
 
     QList<Pair>::iterator result = qBinaryFind(binList->begin(), binList->end(), pair);
     if (result != binList->end())
         result->value = value;
     else {
         *binList << pair;
         qSort(binList->begin(), binList->end());
     }
 }

◆ linearValueForStep()

qreal QGraphicsItemAnimationPrivate::linearValueForStep	(	qreal	step,
		QList< Pair > *	source,
		qreal	defaultValue = `0`
	)

Definition at line 140 of file qgraphicsitemanimation.cpp.

Referenced by QGraphicsItemAnimation::horizontalScaleAt(), QGraphicsItemAnimation::horizontalShearAt(), QGraphicsItemAnimation::posAt(), QGraphicsItemAnimation::rotationAt(), QGraphicsItemAnimation::verticalScaleAt(), QGraphicsItemAnimation::verticalShearAt(), QGraphicsItemAnimation::xTranslationAt(), and QGraphicsItemAnimation::yTranslationAt().

 {
     if (source->isEmpty())
         return defaultValue;
     step = qMin<qreal>(qMax<qreal>(step, 0), 1);
 
     if (step == 1)
         return source->last().value;
 
     qreal stepBefore = 0;
     qreal stepAfter = 1;
     qreal valueBefore = source->first().step == 0 ? source->first().value : defaultValue;
     qreal valueAfter = source->last().value;
 
     // Find the closest step and value before the given step.
     for (int i = 0; i < source->size() && step >= source->at(i).step; ++i) {
         stepBefore = source->at(i).step;
         valueBefore = source->at(i).value;
     }
 
     // Find the closest step and value after the given step.
     for (int j = source->size() - 1; j >= 0 && step < source->at(j).step; --j) {
         stepAfter = source->at(j).step;
         valueAfter = source->at(j).value;
     }
 
     // Do a simple linear interpolation.
     return valueBefore + (valueAfter - valueBefore) * ((step - stepBefore) / (stepAfter - stepBefore));
 }