QSubtreeEnabler 类

class Qt3DRender ::QSubtreeEnabler

启用或禁用框架图形节点的整个子树。更多...

头：	#include <QSubtreeEnabler>
CMake:	find_package(Qt6 COMPONENTS 3drender REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::3drender)
qmake:	QT += 3drender
Since:	Qt 5.14
实例化：	SubtreeEnabler
继承：	Qt3DRender::QFrameGraphNode

所有成员列表，包括继承成员

公共类型

enum	Enablement { Persistent, SingleShot }

特性

enablement : Enablement

公共函数

Qt3DRender::QSubtreeEnabler::Enablement	enablement () const
void	requestUpdate ()
void	setEnablement (Qt3DRender::QSubtreeEnabler::Enablement enablement )

信号

void	enablementChanged (Qt3DRender::QSubtreeEnabler::Enablement enablement )

详细描述

While QFrameGraphNodes can be individually enabled and disabled via the enabled property, this can become tedious when an entire path needs to be turned on or off. QSubtreeEnabler is a convenience node that makes this use case trivial, allowing all of its children to be controlled by a single switch.

QSubtreeEnabler is enabled by default.

成员类型文档编制

enum QSubtreeEnabler:: Enablement

Specifies whether subtree enablement is persistent or transient.

常量	值	描述
`Qt3DRender::QSubtreeEnabler::Persistent`	`0`	The value of enabled is persistent. This is the default.
`Qt3DRender::QSubtreeEnabler::SingleShot`	`1`	The value of enabled will last for a single frame and then be reset to false. This might be used for a subtree drawing to an FBO, for example, to only update the FBO when the relevant portions of the scene changed.

特性文档编制

enablement : Enablement

控制子树启用是持久还是瞬时。

访问函数：

Qt3DRender::QSubtreeEnabler::Enablement	enablement () const
void	setEnablement (Qt3DRender::QSubtreeEnabler::Enablement enablement )

通知程序信号：

void	enablementChanged (Qt3DRender::QSubtreeEnabler::Enablement enablement )

成员函数文档编制

`[invokable]` void QSubtreeEnabler:: requestUpdate ()

Requests that the subtree be enabled.

方便方法旨在用于 SingleShot enablement.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

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