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com.vaadin.ui.renderers.
Class ComponentRenderer
- java.lang.Object
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- com.vaadin.server.AbstractClientConnector
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- com.vaadin.server.AbstractExtension
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- com.vaadin.ui.renderers.AbstractRenderer<Object,Component>
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- com.vaadin.ui.renderers.ComponentRenderer
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All Implemented Interfaces:
MethodEventSource,ClientConnector,Extension,Connector,Renderer<Component>,Serializablepublic class ComponentRenderer extends AbstractRenderer<Object,Component>A renderer for presenting Components.
Note: The use of ComponentRenderer causes the Grid to generate components for all items currently available in the client-side. This means that a number of components is always generated and sent to the client. Using complex structures of many nested components might be heavy to generate and store, which will lead to performance problems.
Note: Components will occasionally be generated again during runtime e.g. when selection changes. If your component has an internal state that is not stored into the object, you should reuse the same component instances.
Example of how to add a
Labelcomponent toGrid:Grid<Person> grid; grid.addColumn(person -> new Label(person.getFullName()), new ComponentRenderer()).setCaption("Full Name");Since:
8.1
Author:
Vaadin Ltd
See Also:
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Nested Class Summary
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Nested classes/interfaces inherited from interface com.vaadin.server.ClientConnector
ClientConnector.AttachEvent, ClientConnector.AttachListener, ClientConnector.ConnectorErrorEvent, ClientConnector.DetachEvent, ClientConnector.DetachListener
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Constructor Summary
Constructors Constructor Description ComponentRenderer()Constructor for ComponentRenderer.
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Method Summary
All Methods Modifier and Type Method Description elemental.json.JsonValueencode(Component value)Encodes the given value into a
JsonValue.protected ComponentRendererStategetState()Returns the shared state for this connector.
protected ComponentRendererStategetState(boolean markAsDirty)Returns the shared state for this connector.
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Methods inherited from class com.vaadin.ui.renderers.AbstractRenderer
encode, extend, getNullRepresentation, getParent, getParentGrid, getPresentationType, getSupportedParentType
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Methods inherited from class com.vaadin.server.AbstractExtension
remove, setParent
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Methods inherited from class com.vaadin.server.AbstractClientConnector
addAttachListener, addDetachListener, addExtension, addListener, addListener, addListener, addListener, addListener, addListener, addMethodInvocationToQueue, attach, beforeClientResponse, createState, detach, encodeState, equals, fireEvent, getAllChildrenIterable, getConnectorId, getErrorHandler, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, getSession, getStateType, getUI, handleConnectorRequest, hashCode, hasListeners, isAttached, isConnectorEnabled, isThis, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeAttachListener, removeDetachListener, removeExtension, removeListener, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler, setResource, updateDiffstate
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface com.vaadin.server.ClientConnector
addAttachListener, addDetachListener, attach, beforeClientResponse, detach, encodeState, getErrorHandler, getExtensions, getRpcManager, getStateType, getUI, handleConnectorRequest, isAttached, isConnectorEnabled, markAsDirty, markAsDirtyRecursive, removeAttachListener, removeDetachListener, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler
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Methods inherited from interface com.vaadin.shared.Connector
getConnectorId
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Method Detail
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encode
public elemental.json.JsonValue encode(Component value)Description copied from interface:
RendererEncodes the given value into a
JsonValue.
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getState
protected ComponentRendererState getState(boolean markAsDirty)Description copied from class:
AbstractClientConnectorReturns the shared state for this connector.
Overrides:
getStatein classAbstractRenderer<Object,Component>Parameters:
markAsDirty- true if the connector should automatically be marked dirty, false otherwiseReturns:
The shared state for this connector. Never null.
See Also:
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getState
protected ComponentRendererState getState()Description copied from class:
AbstractClientConnectorReturns the shared state for this connector. The shared state object is shared between the server connector and the client connector. Changes are only communicated from the server to the client and not in the other direction.
As a side effect, marks the connector dirty so any changes done to the state will be sent to the client. Use
getState(false)to avoid marking the connector as dirty.Overrides:
getStatein classAbstractRenderer<Object,Component>Returns:
The shared state for this connector. Never null.
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