Hi Ali,
there are some things you made wrong:
First, and this seems to be a popular error: you can't add a component
to another by setting the parent of the child! use
parent.getChildren().add(child) instead.
Than: You dont neet to invoke encoding on every component, just create
then component tree and let jsf do the rest.
Try this :
public void encodeBegin( FacesContext context )
{
HtmlPanelGrid panelGrid = new HtmlPanelGrid();
panelGrid.setColumns(2);
List children = panelGrid.getChildren();
UIOutput labelName = new UIOutput();
labelName.setValue("Enter name: ");
labelName.setId("nameId");
children.add(labelName);
UIInput inputName = new UIInput();
inputName.setId("inputNameId");
// UIInput needs a valueBinding
children.add(inputName);
UIOutput labelAge = new UIOutput();
labelAge.setValue("Enter age: ");
labelName.setId("ageId");
children.add(labelAge);
UIInput inputAge = new UIInput();
inputAge.setId("inputAgeId");
// UIInput needs a valueBinding
children.add(inputAge);
this.getChildren.add(panelGrid);
super.encodeBegin(context);
}
Regards,
Volker
Ali Raza wrote:
> Greetings again,
>
> Instead of adding components by rendering the htl myself i am adding
> chilid components and calling their encode methods as following:
>
> public void encodeBegin( FacesContext context )
> {
> try
> {
> ResponseWriter writer = context.getResponseWriter();
> writer.writeComment("********************************* THIS
> IS THE START OF COMPONENT
> **************************************************");
>
> HtmlPanelGrid panelGrid = new HtmlPanelGrid();
> panelGrid.setColumns(2);
> panelGrid.encodeChildren(context);
>
> addComponentBegin(context, "panelGridId", this, panelGrid);
> addComponentEnd(context, panelGrid);
>
> UIOutput labelName = new UIOutput();
> labelName.setValue("Enter name: ");
> addComponentBegin(context, "nameId", panelGrid, labelName);
> addComponentEnd(context, labelName);
>
> UIInput inputName = new UIInput();
> addComponentBegin(context, "inputNameId", panelGrid, inputName);
> addComponentEnd(context, inputName);
>
> UIOutput labelAge = new UIOutput();
> labelAge.setValue("Enter age: ");
> addComponentBegin(context, "ageId", panelGrid, labelAge);
> addComponentEnd(context, labelAge);
>
> UIInput inputAge = new UIInput();
> addComponentBegin(context, "inputAgeId", panelGrid, inputAge);
> addComponentEnd(context, inputAge);
>
>
>
>
> writer.writeComment("********************************* THIS
> IS THE END OF COMPONENT
> **************************************************");
> }
> catch( IOException e )
> {
>
> }
> }
>
> public static void addComponentBegin( FacesContext context, String
> componentId, UIComponent parentComponent, UIComponent childComponent )
> throws IOException
> {
> if( componentId != null )
> {
> childComponent.setId( componentId );
> }
>
> childComponent.setParent( parentComponent );
> childComponent.encodeBegin ( context );
> }
>
> public static void addComponentEnd( FacesContext context,
> UIComponent childComponent ) throws IOException
> {
> childComponent.encodeEnd( context );
> }
>
> My problem is that the layout of the panel grid (2 columns) that i have
> added is not maintained and all encoded children get rendered ina
> straight line quite like flowlayout in swing. can i use column wise
> layout without having to encode the html myself ???
>
> Thanx a lot,
> Ali
>
> --
> "A sixteenth century inventor called Wan Hu designed a rocket-propelled
> chair on which he planned to ascend into heaven. He built an open cabin,
> to which he fitted 47 rockets underneath and above, and two kites to
> keep him aloft. Wan Hu disappeared in flame and smoke and was never seen
> again. A crater on the moon is now named after him, so in one sense he
> made it to the heavens after all. This is the first recorded design of
> something approximating to a manned space rocket."
>
> The Chinese Space Programme.
> From Conception to Future Capabilities.
> Brian Harvey
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