Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* 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 2

* 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, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

* MA  02110-1301, USA.

* 

*/

package org.gvsig.raster.wmts.swing.impl.panel.layer;

import java.awt.Component;

import javax.swing.JToolTip;

import javax.swing.JTree;

import javax.swing.ToolTipManager;

import javax.swing.tree.DefaultTreeCellRenderer;

import org.gvsig.gui.beans.controls.MultiLineToolTip;

import org.gvsig.i18n.Messages;

import org.gvsig.raster.wmts.ogc.struct.WMTSLayer;

/**

 * LayerTree extends the standard JTree class to allow use custom tooltips.

 * It is just JTree containing RemoteLayerNode at its nodes.

 * 

 * @author jaume

 *

 */

@SuppressWarnings("serial")

public class LayerTree extends JTree {

        public boolean showLayerNames = false;

        public LayerTree(){

        super();

        ToolTipManager.sharedInstance().registerComponent(this);

        ToolTipManager.sharedInstance().setDismissDelay(60*1000);

        setCellRenderer(new MyRenderer());

    }

    /**

     * Layer tree specific renderer allowing to show multiple line

     * tooltips 

     * @author jaume

     *

     */

    private class MyRenderer extends DefaultTreeCellRenderer {

       public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {

            super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);

            if (value instanceof WMTSLayer) {

                    WMTSLayer layer = (WMTSLayer) value;

                String myAbstract = layer.getAbstract();

                if (myAbstract == null)

                    myAbstract = "-";

                else 

                    myAbstract = format(myAbstract.trim(), 100);

                String text =

                    Messages.getText("abstract") + ":\n" + myAbstract + "\n\n";

                setToolTipText(text);

                if (!showLayerNames) {

                        if (layer.getTitle() != null || layer.getTitle() == "") {

                                text = layer.toString();

                                text = text.substring(text.indexOf(']') + 2, text.length());

                                setText(text);

                        }

                }

            } else {

                setToolTipText(null);

            }

            return this;

        }

    }

    /**

     * Cuts the message text to force its lines to be shorter or equal to 

     * lineLength.

     * @param message, the message.

     * @param lineLength, the max line length in number of characters.

     * @return the formated message.

     */

    public static String format(String message, int lineLength){

        if (message.length() <= lineLength) return message;

        String[] lines = message.split("\n");

        String theMessage = "";

        for (int i = 0; i < lines.length; i++) {

            String line = lines[i].trim();

            if (line.length() < lineLength)

                theMessage += line + "\n";

            else {

                String[] chunks = line.split(" ");

                String newLine  = "";

                for (int j = 0; j < chunks.length; j++) {

                    int currentLength = newLine.length();

                    chunks[j] = chunks[j].trim();

                    if (chunks[j].length() == 0)

                        continue;

                    if ((currentLength + chunks[j].length() + " ".length()) <= lineLength)

                        newLine += chunks[j] + " ";

                    else {

                        newLine += "\n"+chunks[j]+" ";

                        theMessage += newLine;

                        newLine = "";

                    }

                }

            }

        }

        return theMessage;

    }

    public JToolTip createToolTip() {

            MultiLineToolTip tip = new MultiLineToolTip();

            tip.setComponent(this);

            return tip;

    }

}