org.jdal.vaadin.ui.ListPane.java Source code

Introduction

Here is the source code for org.jdal.vaadin.ui.ListPane.java

Source

/*
 * Copyright 2009-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jdal.vaadin.ui;

import java.util.ArrayList;
import java.util.List;

import com.vaadin.event.MouseEvents.ClickEvent;
import com.vaadin.event.MouseEvents.ClickListener;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Component;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;

/**
 * ListPane
 * 
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public class ListPane extends CustomComponent implements ClickListener {

    private List<ComponentHolder> components = new ArrayList<ComponentHolder>();
    private HorizontalLayout main = new HorizontalLayout();
    private VerticalLayout menu = new VerticalLayout();
    private Panel selected = new Panel();
    private MenuItem itemSelected;

    public void init() {

        menu.setWidth("150px");

        for (ComponentHolder holder : components) {
            MenuItem e = new MenuItem(holder);
            e.addListener(this);
            menu.addComponent(e);
            if (itemSelected == null)
                select(e);
        }

        main.addComponent(menu);
        selected.setSizeFull();
        main.addComponent(selected);
        main.setExpandRatio(selected, 1.0f);
        main.setSizeFull();
        main.setSpacing(true);
        this.setCompositionRoot(main);
    }

    /**
     * @return the components
     */
    public List<ComponentHolder> getComponents() {
        return components;
    }

    /**
     * @param components the components to set
     */
    public void setComponents(List<ComponentHolder> components) {
        this.components = components;
    }

    /**
     * {@inheritDoc}
     */
    public void click(ClickEvent event) {
        select((MenuItem) event.getSource());
    }

    private void select(MenuItem item) {
        if (item.equals(itemSelected))
            return; // nothing to do

        selected.setCaption(item.getCaption());
        Component c = item.getComponent();
        selected.setContent(c);
        if (c instanceof ListPaneAware) {
            ((ListPaneAware) c).show();
        }
        item.setStyleName("menuItem-selected");

        if (itemSelected != null)
            itemSelected.setStyleName("menuItem");

        itemSelected = item;
    }

    public interface ListPaneAware {
        void show();

        void hide();
    }
}

class MenuItem extends Panel {

    public MenuItem(ComponentHolder holder) {
        HorizontalLayout layout = new HorizontalLayout();
        layout.setSpacing(true);
        setContent(layout);
        Embedded e = new Embedded("", holder.getIcon());
        layout.addComponent(e);
        Label l = new Label(holder.getName());
        l.setStyleName(Reindeer.LABEL_H2);
        layout.addComponent(l);
        layout.setComponentAlignment(l, Alignment.BOTTOM_LEFT);
        layout.setComponentAlignment(e, Alignment.BOTTOM_LEFT);
        setStyleName("menuItem");
        this.component = holder.getComponent();
    }

    private Component component;

    /**
     * @return the component
     */
    public Component getComponent() {
        return component;
    }

    /**
     * @param component the component to set
     */
    public void setComponent(Component component) {
        this.component = component;
    }

}