Ability to add WebGalileo Faces component to JSF components tree at run-time

You can add any component to JSF component tree at runtime.

To accomplish that the below steps should be accomplished:

1.	Create helper class like :

public abstract class AddComponent implements ActionListener { protected abstract UIComponent getInstance();

protected abstract String getComponentID();

protected static String formID = "form1";

protected static String panelID = "panelgrid1";

protected FacesContext context = null;

public void processAction(ActionEvent event)

throws AbortProcessingException {

context = FacesContext.getCurrentInstance();

UIForm form = (UIForm) context.getViewRoot().findComponent(formID);

UIPanel panel = (UIPanel) form.findComponent(panelID);

if (panel.findComponent(getComponentID()) == null) {

UIComponent component = getInstance();

component.setId(getComponentID());

panel.getChildren().add(component);

}

Some methods in the corresponding successors should be implemented: getInstance() to create instance of component and getComponentID() to generate new ID.

example

public class AddCalendar extends AddComponent {

protected UIComponent getInstance() {

Calendar calendar = new Calendar();

return calendar;

}

protected String getComponentID() {

return "calendar1";

}

2.	Define the following construction in JSP page to add the component at runtime to JSF components tree:

<h:form id="form1">

<h:commandButton id="addComponent" value="Add Calendar">

<f:actionListener type="testingapplication.calendar.AddCalendar"/>

</h:commandButton>

<h:panelGrid id="panelgrid1" columns="1">

</h:panelGrid>

</h:form>