org.adho.dhconvalidator.ui.CenterPanel.java Source code

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Here is the source code for org.adho.dhconvalidator.ui.CenterPanel.java

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/*
 * Copyright (c) 2015 http://www.adho.org/
 * License: see LICENSE file
 */
package org.adho.dhconvalidator.ui;

import com.vaadin.ui.Alignment;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import org.adho.dhconvalidator.Messages;

/**
 * A panel that displays its components centered and has an optional {@link HeaderPanel}.
 *
 * @author marco.petris@web.de
 */
public class CenterPanel extends VerticalLayout {

    private VerticalLayout center;
    private HeaderPanel headerPanel;

    /**
     * @param showHeader <code>true</code>->display the {@link HeaderPanel}.
     * @param backstepService the service to navigate to via back link
     */
    public CenterPanel(boolean showHeader, ServicesViewName backstepService) {
        initComponents(showHeader, backstepService);
    }

    public CenterPanel(boolean showHeader) {
        this(showHeader, null);
    }

    private void initComponents(boolean showHeader, ServicesViewName backstepService) {
        center = new VerticalLayout();
        center.setSpacing(true);
        setSizeFull();
        addComponent(center);
        center.setSizeUndefined();
        setComponentAlignment(center, Alignment.MIDDLE_CENTER);
        if (showHeader) {
            headerPanel = new HeaderPanel(backstepService);
            center.addComponent(headerPanel);
            Label title = new Label(getTitle());
            title.addStyleName("title-caption");
            center.addComponent(title);
            center.setComponentAlignment(title, Alignment.TOP_LEFT);
        }
    }

    public void addCenteredComponent(Component c) {
        center.addComponent(c);
    }

    public void addCenteredComponent(Component c, Alignment alignment) {
        center.addComponent(c);
        center.setComponentAlignment(c, alignment);
    }

    /** @return the backlink instance or <code>null</code> */
    public BackLink getBackLink() {
        if (headerPanel == null) {
            return null;
        }
        return headerPanel.getBackLink();
    }

    protected String getTitle() {
        return Messages.getString("CenterPanel.title");
    }
}