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  5. QKeyframeAnimation

内容

QKeyframeAnimation Class

( Qt3DAnimation::QKeyframeAnimation )

A class implementing simple keyframe animation to a QTransform 更多...

头： #include <QKeyframeAnimation>
qmake: QT += 3danimation
Since: Qt 5.9
实例化： KeyframeAnimation
继承： QAbstractAnimation

公共类型

enum RepeatMode { None, Constant, Repeat }

特性

公共函数

QKeyframeAnimation (QObject * parent = nullptr)
void addKeyframe (Qt3DCore::QTransform * keyframe )
QEasingCurve easing () const
RepeatMode endMode () const
QVector<float> framePositions () const
QVector<Qt3DCore::QTransform *> keyframeList () const
void removeKeyframe (Qt3DCore::QTransform * keyframe )
void setKeyframes (const QVector<Qt3DCore::QTransform *> & keyframes )
RepeatMode startMode () const
Qt3DCore::QTransform * target () const
QString targetName () const

公共槽

void setEasing (const QEasingCurve & easing )
void setEndMode (RepeatMode mode )
void setFramePositions (const QVector<float> & positions )
void setStartMode (RepeatMode mode )
void setTarget (Qt3DCore::QTransform * target )
void setTargetName (const QString & name )

信号

void easingChanged (const QEasingCurve & easing )
void endModeChanged (QKeyframeAnimation::RepeatMode endMode )
void framePositionsChanged (const QVector<float> & positions )
void startModeChanged (QKeyframeAnimation::RepeatMode startMode )
void targetChanged (Qt3DCore::QTransform * target )
void targetNameChanged (const QString & name )

额外继承成员

详细描述

A class implementing simple keyframe animation to a QTransform

A Qt3DAnimation::QKeyframeAnimation class implements simple keyframe animation that can be used to animate QTransform . The keyframes consists of multiple timed QTransforms, which are interpolated and applied to the target QTransform . QEasingCurve is used between keyframes to control the interpolator. RepeatMode can be set for when the position set to the QKeyframeAnimation is below or above the values defined in the keyframe positions.

成员类型文档编制

enum QKeyframeAnimation:: RepeatMode

This enumeration specifies how position values outside keyframe values are handled.

常量 值 描述
Qt3DAnimation::QKeyframeAnimation::None 0 The animation is not applied to the target transform.
Qt3DAnimation::QKeyframeAnimation::Constant 1 The edge keyframe value is used.
Qt3DAnimation::QKeyframeAnimation::Repeat 2 The animation is repeated.

特性文档编制

easing : QEasingCurve

Holds the easing curve of the interpolator between keyframes.

访问函数：

QEasingCurve easing () const
void setEasing (const QEasingCurve & easing )

通知程序信号：

void easingChanged (const QEasingCurve & easing )

endMode : QKeyframeAnimation::RepeatMode

Holds the repeat mode for the position values greater than the last frame position.

访问函数：

RepeatMode endMode () const
void setEndMode (RepeatMode mode )

通知程序信号：

void endModeChanged (QKeyframeAnimation::RepeatMode endMode )

framePositions : QVector < float >

Holds the positions of the keyframes. Each position in the list specifies the position of the corresponding keyframe with the same index. The values must be in an ascending order. Values can be positive or negative and do not have any predefined unit.

访问函数：

QVector<float> framePositions () const
void setFramePositions (const QVector<float> & positions )

通知程序信号：

void framePositionsChanged (const QVector<float> & positions )

startMode : QKeyframeAnimation::RepeatMode

Holds the repeat mode for the position values less than the first frame position.

访问函数：

RepeatMode startMode () const
void setStartMode (RepeatMode mode )

通知程序信号：

void startModeChanged (QKeyframeAnimation::RepeatMode startMode )

target : Qt3DCore::QTransform *

Holds the target QTransform the animation is applied to.

访问函数：

Qt3DCore::QTransform * target () const
void setTarget (Qt3DCore::QTransform * target )

通知程序信号：

void targetChanged (Qt3DCore::QTransform * target )

targetName : QString

Holds the name of the target transform. This is a convenience property making it easier to match the target transform to the keyframe animation. The name is usually same as the name of the parent entity of the target transform, but does not have to be.

访问函数：

QString targetName () const
void setTargetName (const QString & name )

通知程序信号：

void targetNameChanged (const QString & name )

成员函数文档编制

QKeyframeAnimation:: QKeyframeAnimation ( QObject * parent = nullptr)

Constructs an QKeyframeAnimation with parent .

void QKeyframeAnimation:: addKeyframe ( Qt3DCore::QTransform * keyframe )

Adds new keyframe at the end of the animation. The QTransform can be added to the animation multiple times.

QVector < Qt3DCore::QTransform *> QKeyframeAnimation:: keyframeList () const

Returns the list of keyframes.

void QKeyframeAnimation:: removeKeyframe ( Qt3DCore::QTransform * keyframe )

Removes a keyframe from the animation. If the same QTransform is set as keyframe multiple times, all occurrences are removed.

void QKeyframeAnimation:: setKeyframes (const QVector < Qt3DCore::QTransform *> & keyframes )

设置 keyframes of the animation. Old keyframes are cleared.