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package com.sun.faces.test.servlet30.dynamic;
import javax.faces.component.FacesComponent;
import javax.faces.component.UIComponentBase;
import javax.faces.component.UIViewRoot;
import javax.faces.component.html.HtmlOutputText;
import javax.faces.component.html.HtmlPanelGroup;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.PreRenderViewEvent;
import javax.faces.event.PostAddToViewEvent;
import javax.faces.event.SystemEvent;
import javax.faces.event.SystemEventListener;
@FacesComponent( value = "com.sun.faces.test.servlet30.dynamic.MoveComponent" )
public class MoveComponent extends UIComponentBase implements SystemEventListener {
//
// Constructor - subscribes to PostAddToViewEvent(s)
//
public MoveComponent() {
setRendererType( "component" );
FacesContext context = FacesContext.getCurrentInstance();
UIViewRoot root = context.getViewRoot();
root.subscribeToViewEvent( PreRenderViewEvent.class, this );
}
//
// Public methods
//
@Override
public String getFamily() {
return "com.sun.faces.test.servlet30.dynamic";
}
public boolean isListenerForSource( Object source ) {
return ( source instanceof UIViewRoot );
}
// This event method will do the following:
// PostAddToViewEvent processing:
// Dynamically modifies component tree by moving "Foo" from outside
// the panel to inside the panel.
@Override
public void processEvent( SystemEvent event )
throws AbortProcessingException {
// Do not re-modify the component tree
if (FacesContext.getCurrentInstance().isPostback()) {
return;
}
// Dynamically modify the component tree. Move Foo from outside to inside the panel
HtmlOutputText outputText = (HtmlOutputText) getChildren().get( 0 );
HtmlPanelGroup panel = (HtmlPanelGroup) getChildren().get( 1 );
boolean removed = getChildren().remove( outputText );
panel.getChildren().add( 0, outputText );
}
}