com.extjs.gxt.ui.client.widget.layout.MenuLayout.java Source code

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Here is the source code for com.extjs.gxt.ui.client.widget.layout.MenuLayout.java

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/*
 * Sencha GXT 2.3.1 - Sencha for GWT
 * Copyright(c) 2007-2013, Sencha, Inc.
 * licensing@sencha.com
 * 
 * http://www.sencha.com/products/gxt/license/
 */
package com.extjs.gxt.ui.client.widget.layout;

import com.extjs.gxt.ui.client.GXT;
import com.extjs.gxt.ui.client.core.El;
import com.extjs.gxt.ui.client.widget.Component;
import com.extjs.gxt.ui.client.widget.Container;
import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.extjs.gxt.ui.client.widget.Layout;
import com.extjs.gxt.ui.client.widget.form.Field;
import com.extjs.gxt.ui.client.widget.menu.AdapterMenuItem;
import com.google.gwt.dom.client.Node;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Accessibility;

/**
 * Custom layout for <code>Menu</code>
 */
public class MenuLayout extends Layout {
    protected void cleanup(El target) {
        NodeList<Node> cn = target.dom.getChildNodes();
        for (int i = cn.getLength() - 1; i >= 0; i--) {
            if (!cn.getItem(i).hasChildNodes()) {
                target.dom.removeChild(cn.getItem(i));
            }
        }
    }

    @Override
    protected void onComponentHide(Component component) {
        super.onComponentHide(component);
        if (component.isRendered()) {
            component.el().getParent().addStyleName(component.getHideMode().value());
        }

    }

    @Override
    protected void onComponentShow(Component component) {
        super.onComponentShow(component);
        if (component.isRendered()) {
            component.el().getParent().removeStyleName(component.getHideMode().value());
        }
    }

    @Override
    protected void onLayout(Container<?> container, El target) {
        super.onLayout(container, target);
        cleanup(target);
    }

    @Override
    protected void renderComponent(Component c, int index, El target) {
        if (c != null && (!c.isRendered() || !isValidParent(c.getElement(), target.dom))) {
            Element div = DOM.createDiv();
            div.setId("x-menu-el-" + c.getId());
            div.setClassName("x-menu-list-item");

            if (GXT.isAriaEnabled()) {
                Accessibility.setRole(div, "presentation");
            }
            target.insertChild(div, index);
            boolean needsIndent = (c instanceof Field<?>) || (c instanceof ContentPanel)
                    || (c instanceof AdapterMenuItem && ((AdapterMenuItem) c).isNeedsIndent());

            if (!c.isRendered()) {
                c.render(div);
            } else {
                c.el().insertInto(div);
                if (!c.isEnabled()) {
                    c.disable();
                }
            }
            fly(div).setStyleName("x-menu-list-item-indent", needsIndent);

        }
    }
}