com.facebook.react.uimanager

Class SimpleViewManager<T extends android.view.View>

java.lang.Object

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

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

Type Parameters:

T - the view handled by this manager

Direct Known Subclasses:

ReactImageManager, ReactSwitchManager

public abstract class SimpleViewManager<T extends android.view.View>
extends ViewManager<T,ReactShadowNode>

A partial implementation of ViewManager that applies common properties such as background color, opacity and CSS layout. Implementations should make sure to call super.updateView() in order for these properties to be applied.

Constructor Summary

Constructors

Constructor and Description
SimpleViewManager()

Method Summary

Methods

Modifier and Type	Method and Description
ReactShadowNode	createCSSNodeInstance() This method should return a subclass of CSSNode which will be then used for measuring position and size of the view.
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).
void	updateView(T root, CatalystStylesDiffMap props) Subclass should use this method to populate native view with updated style properties.

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

SimpleViewManager

public SimpleViewManager()

Method Detail

createCSSNodeInstance

public ReactShadowNode createCSSNodeInstance()

Description copied from class: ViewManager

This method should return a subclass of CSSNode 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 CSSNode

Specified by:

createCSSNodeInstance in class ViewManager<T extends android.view.View,ReactShadowNode>

updateView

public void updateView(T root,
              CatalystStylesDiffMap props)

Description copied from class: ViewManager

Subclass should use this method to populate native view with updated style properties. In case when a certain property is present in map but the value is null, this property should be reset to the default value TODO(krzysztof) This method should be replaced by updateProperties and removed completely after all view managers adapt @ReactProp

Overrides:

updateView in class ViewManager<T extends android.view.View,ReactShadowNode>

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.View,ReactShadowNode>