QStyleOptionGraphicsItem ¶

概要 ¶

详细描述 ¶

For performance reasons, the access to the member variables is direct (i.e., using the . or -> operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters.

对于可以如何使用样式选项的演示范例，见 样式 范例。

另请参阅

QStyleOption paint()

class QStyleOptionGraphicsItem ¶

QStyleOptionGraphicsItem(other)

QStyleOptionGraphicsItem(version)

param other

QStyleOptionGraphicsItem

param version

int

构造 QStyleOptionGraphicsItem .

构造副本为 other .

构造副本为 other .

PySide2.QtWidgets.QStyleOptionGraphicsItem. StyleOptionType ¶

This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子类。

常量	描述
QStyleOptionGraphicsItem.Type	The type of style option provided ( SO_GraphicsItem for this class).

The type is used internally by QStyleOption , its subclasses, and qstyleoption_cast() to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.

另请参阅

StyleOptionVersion

PySide2.QtWidgets.QStyleOptionGraphicsItem. StyleOptionVersion ¶

This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子类。

常量	描述
QStyleOptionGraphicsItem.Version	1

The version is used by QStyleOption subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast() , you normally do not need to check it.

另请参阅

StyleOptionType

PySide2.QtWidgets.QStyleOptionGraphicsItem. exposedRect ¶

PySide2.QtWidgets.QStyleOptionGraphicsItem. matrix ¶

PySide2.QtWidgets.QStyleOptionGraphicsItem. levelOfDetail ¶

static PySide2.QtWidgets.QStyleOptionGraphicsItem. levelOfDetailFromTransform ( worldTransform ) ¶

参数

worldTransform – QTransform

返回类型

qreal

Returns the level of detail from the worldTransform .

Its value represents the maximum value of the height and width of a unity rectangle, mapped using the worldTransform of the painter used to draw the item. By default, if no transformations are applied, its value is 1. If zoomed out 1:2, the level of detail will be 0.5, and if zoomed in 2:1, its value is 2.

另请参阅

minimumRenderSize()