Application: gvSIG desktop

/*

 * Copyright (C) 2017 gvSIG Association

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.gvsig.app.project.documents.view.gui;

import java.awt.BorderLayout;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.swing.Icon;

import javax.swing.JComponent;

import javax.swing.JPanel;

import javax.swing.JTabbedPane;

import org.gvsig.tools.swing.api.Component;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 *

 * @author jjdelcerro

 */

public class DefaultViewInformationArea implements ViewInformationArea {

    protected final Logger logger = LoggerFactory.getLogger(DefaultViewInformationArea.class);

    private static class Element implements Component {

        private final JComponent component;

        private final String id;

        private final String label;

        private final Icon icon;

        private final int priority;

        private String tip;

        public Element(JComponent component, String id, int priority, String label, Icon icon, String tip) {

            this.component = component;

            this.id = id;

            this.priority = priority;

            this.label = label;

            this.icon = icon;

            this.tip = tip;

        }

        public int getPriority() {

            return this.priority;

        }

        @Override

        public JComponent asJComponent() {

            return this.component;

        }

        public String getLabel() {

            return this.label;

        }

        public String getTip() {

            return this.tip;

        }

        public Icon getIcon() {

            return this.icon;

        }

    }

    private final Map<String,Element> elements;

    private JPanel panel;

    private JTabbedPane tab;

    public DefaultViewInformationArea() {

        this.elements = new HashMap<>();

        this.panel = null;

        this.tab = null;

    }

    @Override

    public void add(JComponent component, String id, int priority, String label, Icon icon, String tip) {

        Element element = new Element(component, id, priority, label, icon, tip);

        this.elements.put(id, element);

        this.update();

    }

    @Override

    public void remove(String id) {

        this.elements.remove(id);

        this.update();

    }

    private void update() {

        if( this.panel == null ) {

            return;

        }

        this.panel.removeAll();

        if( this.elements.isEmpty() ) {

            return;

        }

        List<Element> elements = new ArrayList(this.elements.values());

        if( elements.size()==1 ) {

            Element element = elements.get(0);

            this.panel.add(element.asJComponent(), BorderLayout.CENTER);

            return;

        }

        Collections.sort(elements, new Comparator<Element>() {

            @Override

            public int compare(Element o1, Element o2) {

                return Integer.compare(o1.getPriority(),o2.getPriority());

            }

        });

        JTabbedPane tab = new JTabbedPane();

        tab.setTabPlacement(JTabbedPane.BOTTOM);

        tab.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);

        for( Element element : elements ) {

            tab.addTab(

                element.getLabel(), 

                element.getIcon(), 

                element.asJComponent(), 

                element.getTip()

            );

        }

        int index = 0;

        if( this.tab != null ) { 

            index = this.tab.getSelectedIndex();

        }

        if( index < 0 ) {

            index = 0;

        } else if( index >= tab.getTabCount() ) {

            index = tab.getTabCount()-1;

        }

        try {

            tab.setSelectedIndex(index);

        } catch(Exception ex) {

            logger.warn("Can't restore the selected tab", ex);

        }

        this.tab = tab;

        this.panel.add(this.tab, BorderLayout.CENTER);

    }

    @Override

    public JComponent asJComponent() {

        if( this.panel == null ) {

            this.panel = new JPanel();

            this.panel.setLayout(new BorderLayout());

            this.update();

        }

        return this.panel;

    }

}