[codenameone-discussions] List vs list of Components

[Bryan Buchanan]

I had a custom ListCellRendered which had

setUIID("Underline");
focus = new Label("");
focus.setUIID("UnderlineSelected");

and

   @Override
    public Component getListFocusComponent(List list) {
        return focus;
    }

so when the List item is selected the visual appearance of that item 
changes. I've now changed the code to use a list of Components, as advised, 
where each component is generated from:

    Container makeComponent(final Product product) {

        int h = Display.getInstance().convertToPixels(8, false);

        Container c = new Container();
        c.setUIID("Underline");
        c.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
        c.setScrollableY(false);

        Label code = new Label();
        code.setUIID("BoldLabel");
        code.setText(product.getCode());

        Label price = new Label();
        price.setUIID("BoldLabel");
        price.setText("$" + product.getPrice() + "/" + product.getUnit());

        Label desc = new Label();
        desc.setUIID("MyLabel");
        desc.setText(product.getDescription());

        Container c1 = new Container();
        c1.setLayout(new BorderLayout());
        c1.addComponent(BorderLayout.WEST, code);
        c1.addComponent(BorderLayout.EAST, price);

        c.add(c1);
        c.add(desc);

        c.setPreferredH(c.getPreferredH() < h ? h : c.getPreferredH());

        return c;

    }

where these components are added to a form in a loop. The UIID "Underline" 
that the container has renders OK. I've changed the Selected and Pressed 
styles for the "Underline" selector to be the same as the 
"UnderlineSelected" UIID I was originally using in the List implimentation. 
My problem is when one of these containers is selected/pressed there is no 
change in the visual appearance.

If I make the components buttons, such as:

   Container makeComponent(final ProductCategory pc) {

        int h = Display.getInstance().convertToPixels(8, false);

        Container c = new Container();
        c.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
        c.setScrollableY(false);

        Button b = new Button(pc.getDescription());
        b.setUIID("Underline");
        b.setPreferredH(b.getPreferredH() < h ? h : b.getPreferredH());
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent evt) {

                CommonContext.INSTANCE.setProductCategory(pc);

                GroupForm f = new GroupForm().init();
                f.setBackForm(CategoryForm.this);
                f.show();
            }

        });

        c.add(b);
        return c;

    }

this works because the button changes state.

What is the best way to get a state change in a Container which does not 
have a button (or has other stuff in addition to a button).

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