内容

• 特性
• 公共函数
• 公共槽
• 信号
• 相关非成员
• 详细描述

QNode Class

class Qt3DCore ::QNode

QNode is the base class of all Qt3D node classes used to build a Qt3D scene. 更多...

头：	#include <QNode>
CMake:	find_package(Qt6 COMPONENTS 3dcore REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::3dcore)
qmake:	QT += 3dcore
Since:	Qt 5.5
继承：	QObject
继承者：	Qt3DAnimation::QAbstractAnimationClip , Qt3DAnimation::QAbstractClipBlendNode , Qt3DAnimation::QChannelMapper , Qt3DCore::QAbstractSkeleton , Qt3DCore::QAttribute , Qt3DCore::QBuffer , Qt3DCore::QComponent , Qt3DCore::QEntity , Qt3DCore::QGeometry , Qt3DCore::QGeometryView , Qt3DCore::QJoint , Qt3DInput::QAbstractActionInput , Qt3DInput::QAbstractAxisInput , Qt3DInput::QAbstractPhysicalDevice , Qt3DInput::QAction , Qt3DInput::QAxis , Qt3DInput::QAxisSetting , Qt3DRender::QAbstractTexture , Qt3DRender::QAbstractTextureImage , Qt3DRender::QEffect , Qt3DRender::QFilterKey , Qt3DRender::QFrameGraphNode , Qt3DRender::QParameter , Qt3DRender::QPickingSettings , Qt3DRender::QRenderPass , Qt3DRender::QRenderState , Qt3DRender::QRenderTargetOutput , Qt3DRender::QShaderImage , Qt3DRender::QShaderProgram , Qt3DRender::QShaderProgramBuilder , Qt3DRender::QTechnique ，和 Qt3DRender::Quick::QScene2D

• 所有成员列表，包括继承成员

特性

• enabled : bool
• parent : Qt3DCore::QNode*

公共函数

	QNode (Qt3DCore::QNode * parent = nullptr)
bool	blockNotifications (bool block )
Qt3DCore::QNodeVector	childNodes () const
Qt3DCore::QNodeId	id () const
bool	isEnabled () const
bool	notificationsBlocked () const
Qt3DCore::QNode *	parentNode () const

公共槽

void	setEnabled (bool isEnabled )
void	setParent (Qt3DCore::QNode * parent )

信号

void	enabledChanged (bool enabled )
void	nodeDestroyed ()
void	parentChanged (QObject * parent )

相关非成员

	QNodePtr
	QNodeVector
Qt3DCore::QNodeId	qIdForNode (Qt3DCore::QNode * node )
Qt3DCore::QNodeIdVector	qIdsForNodes (const T & nodes )

详细描述

The owernship of QNode is determined by the QObject parent/child relationship between nodes. By itself, a QNode has no visual appearance and no particular meaning, it is there as a way of building a node based tree structure.

The parent of a QNode instance can only be another QNode instance.

Each QNode instance has a unique id that allows it to be recognizable from other instances.

When properties are defined on a QNode subclass, their NOTIFY signal will automatically generate notifications that the Qt3D backend aspects will receive.

另请参阅 QEntity and QComponent .

特性文档编制

enabled : bool

保持 QNode enabled flag. By default a QNode is always enabled.

注意： the interpretation of what enabled means is aspect-dependent. Even if enabled is set to false , some aspects may still consider the node in some manner. This is documented on a class by class basis.

访问函数：

bool	isEnabled () const
void	setEnabled (bool isEnabled )

通知程序信号：

void	enabledChanged (bool enabled )

parent : Qt3DCore::QNode *

Holds the immediate QNode parent, or null if the node has no parent.

Setting the parent will notify the backend aspects about current QNode instance's parent change.

注意： if parent happens to be null, this will actually notify that the current QNode instance was removed from the scene.

访问函数：

Qt3DCore::QNode *	parentNode () const
void	setParent (Qt3DCore::QNode * parent )

通知程序信号：

void	parentChanged (QObject * parent )

成员函数文档编制

QNode:: QNode ( Qt3DCore::QNode * parent = nullptr)

Creates a new QNode instance with parent parent .

注意： The backend aspects will be notified that a QNode instance is part of the scene only if it has a parent; unless this is the root node of the Qt3D scene.

另请参阅 setParent ().

[signal] void QNode:: nodeDestroyed ()

Emitted when the node is destroyed.

bool QNode:: blockNotifications ( bool block )

若 block is true , property change notifications sent by this object to aspects are blocked. If block is false , no such blocking will occur.

返回值是先前值的 notificationsBlocked ().

Note that the other notification types will be sent even if the notifications for this object have been blocked.

另请参阅 notificationsBlocked ().

Qt3DCore::QNodeVector QNode:: childNodes () const

Returns a list filled with the QNode children of the current QNode 实例。

Qt3DCore::QNodeId QNode:: id () const

Returns the id that uniquely identifies the QNode 实例。

bool QNode:: notificationsBlocked () const

返回 true if aspect notifications are blocked; otherwise returns false . By default, notifications are not blocked.

另请参阅 blockNotifications ().

相关非成员

[alias] QNodePtr

共享指针为 QNode .

[alias] QNodeVector

List of QNode pointers.

Qt3DCore::QNodeId qIdForNode ( Qt3DCore::QNode * node )

Returns node id for node .

template <typename T> Qt3DCore::QNodeIdVector qIdsForNodes (const T & nodes )

Returns vector of node ids for nodes .