com.facebook.react.uimanager

Class ViewGroupManager<T extends android.view.ViewGroup>

java.lang.Object

com.facebook.react.uimanager.ViewManager<T,C>

com.facebook.react.uimanager.BaseViewManager<T,LayoutShadowNode>

com.facebook.react.uimanager.ViewGroupManager<T>

Direct Known Subclasses:

ReactDrawerLayoutManager, ReactHorizontalScrollViewManager, ReactScrollViewManager, ReactToolbarManager, ReactViewManager, ReactViewPagerManager, RecyclerViewBackedScrollViewManager, RootViewManager, SwipeRefreshLayoutManager

public abstract class ViewGroupManager<T extends android.view.ViewGroup>
extends BaseViewManager<T,LayoutShadowNode>

Class providing children management API for view managers of classes extending ViewGroup.

Field Summary

Fields inherited from class com.facebook.react.uimanager.BaseViewManager

PROP_TEST_ID

Constructor Summary

Constructors

Constructor and Description
ViewGroupManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	addView(T parent, android.view.View child, int index)
LayoutShadowNode	createShadowNodeInstance() This method should return a subclass of ReactShadowNode which will be then used for measuring position and size of the view.
android.view.View	getChildAt(T parent, int index)
int	getChildCount(T parent)
java.lang.Class<? extends LayoutShadowNode>	getShadowNodeClass() This method should return Class instance that represent type of shadow node that this manager will return from ViewManager.createShadowNodeInstance().
boolean	needsCustomLayoutForChildren() Returns whether this View type needs to handle laying out its own children instead of deferring to the standard css-layout algorithm.
void	removeAllViews(T parent)
void	removeViewAt(T parent, int index)
void	updateExtraData(T root, java.lang.Object extraData) Subclasses can implement this method to receive an optional extra data enqueued from the corresponding instance of ReactShadowNode in ReactShadowNode.onCollectExtraUpdates(com.facebook.react.uimanager.UIViewOperationQueue).

Methods inherited from class com.facebook.react.uimanager.BaseViewManager

setAccessibilityComponentType, setAccessibilityLabel, setAccessibilityLiveRegion, setBackgroundColor, setDecomposedMatrix, setElevation, setImportantForAccessibility, setOpacity, setRenderToHardwareTexture, setRotation, setScaleX, setScaleY, setTestId, setTranslateX, setTranslateY

Methods inherited from class com.facebook.react.uimanager.ViewManager

addEventEmitters, createView, createViewInstance, getCommandsMap, getExportedCustomBubblingEventTypeConstants, getExportedCustomDirectEventTypeConstants, getExportedViewConstants, getName, getNativeProps, onAfterUpdateTransaction, onDropViewInstance, receiveCommand, updateProperties

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ViewGroupManager

public ViewGroupManager()

Method Detail

createShadowNodeInstance

public LayoutShadowNode createShadowNodeInstance()

Description copied from class: ViewManager

This method should return a subclass of ReactShadowNode which will be then used for measuring position and size of the view. In mose of the cases this should just return an instance of ReactShadowNode

Specified by:

createShadowNodeInstance in class ViewManager<T extends android.view.ViewGroup,LayoutShadowNode>

getShadowNodeClass

public java.lang.Class<? extends LayoutShadowNode> getShadowNodeClass()

Description copied from class: ViewManager

This method should return Class instance that represent type of shadow node that this manager will return from ViewManager.createShadowNodeInstance(). This method will be used in the bridge initialization phase to collect properties exposed using ReactProp (or ReactPropGroup) annotation from the ReactShadowNode subclass specific for native view this manager provides.

Specified by:

getShadowNodeClass in class ViewManager<T extends android.view.ViewGroup,LayoutShadowNode>

Returns:

Class object that represents type of shadow node used by this view manager.

updateExtraData

public void updateExtraData(T root,
                   java.lang.Object extraData)

Description copied from class: ViewManager

Subclasses can implement this method to receive an optional extra data enqueued from the corresponding instance of ReactShadowNode in ReactShadowNode.onCollectExtraUpdates(com.facebook.react.uimanager.UIViewOperationQueue). Since css layout step and ui updates can be executed in separate thread apart of setting x/y/width/height this is the recommended and thread-safe way of passing extra data from css node to the native view counterpart. TODO(7247021): Replace updateExtraData with generic update props mechanism after D2086999

Specified by:

updateExtraData in class ViewManager<T extends android.view.ViewGroup,LayoutShadowNode>

addView

public void addView(T parent,
           android.view.View child,
           int index)

getChildCount

public int getChildCount(T parent)

getChildAt

public android.view.View getChildAt(T parent,
                           int index)

removeViewAt

public void removeViewAt(T parent,
                int index)

removeAllViews

public void removeAllViews(T parent)

needsCustomLayoutForChildren

public boolean needsCustomLayoutForChildren()

Returns whether this View type needs to handle laying out its own children instead of deferring to the standard css-layout algorithm. Returns true for the layout to *not* be automatically invoked. Instead onLayout will be invoked as normal and it is the View instance's responsibility to properly call layout on its children. Returns false for the default behavior of automatically laying out children without going through the ViewGroup's onLayout method. In that case, onLayout for this View type must *not* call layout on its children.