QGraphicsScale Class
The QGraphicsScale class provides a scale transformation. 更多...
| 头文件: | #include <QGraphicsScale> |
| qmake: | QT += widgets |
| 开始支持版本: | Qt 4.6 |
| 基类: | QGraphicsTransform |
属性
- 1 个属性继承自 QObject
公有函数
| QGraphicsScale(QObject *parent = Q_NULLPTR) | |
| ~QGraphicsScale() | |
| QVector3D | origin() const |
| void | setOrigin(const QVector3D &point) |
| void | setXScale(qreal) |
| void | setYScale(qreal) |
| void | setZScale(qreal) |
| qreal | xScale() const |
| qreal | yScale() const |
| qreal | zScale() const |
重新实现的公有函数
| virtual void | applyTo(QMatrix4x4 *matrix) const |
- 1 个公有函数继承自 QGraphicsTransform
- 32 个公有函数继承自 QObject
信号
| void | originChanged() |
| void | scaleChanged() |
| void | xScaleChanged() |
| void | yScaleChanged() |
| void | zScaleChanged() |
- 2 个信号继承自 QObject
其他继承的成员
- 1 个公有槽函数继承自 QObject
- 1 个公有变量继承自 QObject
- 10 个静态公有成员继承自 QObject
- 9 个受保护的函数继承自 QObject
- 1 个受保护的槽函数继承自 QGraphicsTransform
- 2 个受保护的变量继承自 QObject
详细描述
The QGraphicsScale class provides a scale transformation.
QGraphicsScene provides certain parameters to help control how the scale should be applied.
The origin is the point that the item is scaled from (i.e., it stays fixed relative to the parent as the rest of the item grows). By default the origin is QPointF(0, 0).
The parameters xScale, yScale, and zScale describe the scale factors to apply in horizontal, vertical, and depth directions. They can take on any value, including 0 (to collapse the item to a point) or negative value. A negative xScale value will mirror the item horizontally. A negative yScale value will flip the item vertically. A negative zScale will flip the item end for end.
参见 QGraphicsTransform, QGraphicsItem::setScale(), and QTransform::scale().
属性
origin : QVector3D
This property holds the origin of the scale in 3D space.
All scaling will be done relative to this point (i.e., this point will stay fixed, relative to the parent, when the item is scaled).
访问函数:
| QVector3D | origin() const |
| void | setOrigin(const QVector3D &point) |
Notifier signal:
| void | originChanged() |
参见 xScale, yScale, and zScale.
xScale : qreal
This property holds the horizontal scale factor.
The scale factor can be any real number; the default value is 1.0. If you set the factor to 0.0, the item will be collapsed to a single point. If you provide a negative value, the item will be mirrored horizontally around its origin.
访问函数:
| qreal | xScale() const |
| void | setXScale(qreal) |
Notifier signal:
| void | xScaleChanged() |
参见 yScale, zScale, and origin.
yScale : qreal
This property holds the vertical scale factor.
The scale factor can be any real number; the default value is 1.0. If you set the factor to 0.0, the item will be collapsed to a single point. If you provide a negative value, the item will be flipped vertically around its origin.
访问函数:
| qreal | yScale() const |
| void | setYScale(qreal) |
Notifier signal:
| void | yScaleChanged() |
参见 xScale, zScale, and origin.
zScale : qreal
This property holds the depth scale factor.
The scale factor can be any real number; the default value is 1.0. If you set the factor to 0.0, the item will be collapsed to a single point. If you provide a negative value, the item will be flipped end for end around its origin.
访问函数:
| qreal | zScale() const |
| void | setZScale(qreal) |
Notifier signal:
| void | zScaleChanged() |
成员函数
QGraphicsScale::QGraphicsScale(QObject *parent = Q_NULLPTR)
Constructs an empty QGraphicsScale object with the given parent.
QGraphicsScale::~QGraphicsScale()
Destroys the graphics scale.
[virtual] void QGraphicsScale::applyTo(QMatrix4x4 *matrix) const
重新实现 QGraphicsTransform::applyTo().
[signal] void QGraphicsScale::originChanged()
QGraphicsScale emits this signal when its origin changes.
Note: Notifier signal for property origin.
[signal] void QGraphicsScale::scaleChanged()
This signal is emitted whenever the xScale, yScale, or zScale of the object changes.
参见 QGraphicsScale::xScale, QGraphicsScale::yScale, and QGraphicsScale::zScale.
[signal] void QGraphicsScale::xScaleChanged()
This signal is emitted whenever the xScale property changes.
This function was introduced in Qt 4.7.
Note: Notifier signal for property xScale.
[signal] void QGraphicsScale::yScaleChanged()
This signal is emitted whenever the yScale property changes.
This function was introduced in Qt 4.7.
Note: Notifier signal for property yScale.
[signal] void QGraphicsScale::zScaleChanged()
This signal is emitted whenever the zScale property changes.
This function was introduced in Qt 4.7.
Note: Notifier signal for property zScale.