Qt3DCore.QNode ¶

概要 ¶

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 实例。

每 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 QComponent

class PySide2.Qt3DCore.Qt3DCore. QNode ( [ parent=None ] ) ¶

param parent

QNode

创建新 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()

PySide2.Qt3DCore.Qt3DCore.QNode. PropertyTrackingMode ¶

Indicates how a QNode listens for property updates.

常量	描述
Qt3DCore.QNode.TrackFinalValues	Tracks final values
Qt3DCore.QNode.DontTrackValues	Does not track values
Qt3DCore.QNode.TrackAllValues	Tracks all values

PySide2.Qt3DCore.Qt3DCore.QNode. blockNotifications ( block ) ¶

参数

block – bool

返回类型

bool

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()

PySide2.Qt3DCore.Qt3DCore.QNode. childNodes ( ) ¶

返回类型

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

PySide2.Qt3DCore.Qt3DCore.QNode. clearPropertyTracking ( propertyName ) ¶

参数

propertyName – unicode

Clears the tracking property called propertyName .

PySide2.Qt3DCore.Qt3DCore.QNode. clearPropertyTrackings ( ) ¶

Erases all values that have been saved by the property tracking.

PySide2.Qt3DCore.Qt3DCore.QNode. defaultPropertyTrackingMode ( ) ¶

返回类型

PropertyTrackingMode

Returns the default property tracking mode which determines whether a QNode should be listening for property updates.

另请参阅

setDefaultPropertyTrackingMode()

PySide2.Qt3DCore.Qt3DCore.QNode. defaultPropertyTrackingModeChanged ( mode ) ¶

参数

mode – PropertyTrackingMode

PySide2.Qt3DCore.Qt3DCore.QNode. enabledChanged ( enabled ) ¶

参数

enabled – bool

PySide2.Qt3DCore.Qt3DCore.QNode. id ( ) ¶

返回类型

QNodeId

Returns the id that uniquely identifies the QNode 实例。

PySide2.Qt3DCore.Qt3DCore.QNode. isEnabled ( ) ¶

返回类型

bool

PySide2.Qt3DCore.Qt3DCore.QNode. nodeDestroyed ( ) ¶

PySide2.Qt3DCore.Qt3DCore.QNode. notificationsBlocked ( ) ¶

返回类型

bool

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

另请参阅

blockNotifications()

PySide2.Qt3DCore.Qt3DCore.QNode. notifyObservers ( change ) ¶

参数

change – QSharedPointer

注意

此函数被弃用。

发送 change QSceneChangePtr to any QBackendNodes in the registered aspects that correspond to this QNode .

You only need to call this function if you wish to send a specific type of change in place of the automatic handling.

Note: as of Qt 5.14, change messages are deprecated and should not be used, in particular for properties.

PySide2.Qt3DCore.Qt3DCore.QNode. parentChanged ( parent ) ¶

参数

parent – QObject

PySide2.Qt3DCore.Qt3DCore.QNode. parentNode ( ) ¶

返回类型

QNode

PySide2.Qt3DCore.Qt3DCore.QNode. propertyTracking ( propertyName ) ¶

参数

propertyName – unicode

返回类型

PropertyTrackingMode

Returns the tracking mode of propertyName .

另请参阅

setPropertyTracking()

PySide2.Qt3DCore.Qt3DCore.QNode. sceneChangeEvent ( change ) ¶

参数

change – QSharedPointer

注意

此函数被弃用。

Called when one or more backend aspects sends a notification change to the current QNode 实例。

注意

This method should be reimplemented in your subclasses to properly handle the change .

PySide2.Qt3DCore.Qt3DCore.QNode. sendReply ( command ) ¶

参数

command – QSharedPointer

注意

此函数被弃用。

发送 command back to the backend node.

Assumes the command is to be to sent back in reply to itself to the backend node.

另请参阅

QNodeCommand sendCommand

PySide2.Qt3DCore.Qt3DCore.QNode. setDefaultPropertyTrackingMode ( mode ) ¶

参数

mode – PropertyTrackingMode

另请参阅

defaultPropertyTrackingMode()

PySide2.Qt3DCore.Qt3DCore.QNode. setEnabled ( isEnabled ) ¶

参数

isEnabled – bool

另请参阅

isEnabled()

PySide2.Qt3DCore.Qt3DCore.QNode. setParent ( parent ) ¶

参数

parent – QNode

PySide2.Qt3DCore.Qt3DCore.QNode. setPropertyTracking ( propertyName , trackMode ) ¶

参数

• propertyName – unicode

• trackMode – PropertyTrackingMode

Sets the property tracking for propertyName and trackMode .

另请参阅

propertyTracking()