Application: gvSIG desktop

/* 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.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2010 Prodevelop S.L. main development

 * http://www.prodevelop.es

 */

package org.gvsig.arcims.image.gui.panels.utils;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Insets;

import javax.swing.CellRendererPane;

import javax.swing.JComponent;

import javax.swing.JTextArea;

import javax.swing.JToolTip;

import javax.swing.plaf.ComponentUI;

import javax.swing.plaf.basic.BasicToolTipUI;

/**

 * This class allows nice multiline tool tips.

 *

 * @author Zafir Anjum

 * @author jldominguez

 */

public class MultilineToolTipUI extends BasicToolTipUI {

    static MultilineToolTipUI sharedInstance = new MultilineToolTipUI();

    // Dialog, SansSerif - similar to Arial

    // DialogInput, Monospaced - similar to Courier

    // Serif - similar to Times New Roman 

    static JToolTip tip;

    private static JTextArea textArea;

    Font smallFont = new Font("Dialog", Font.PLAIN, 12);

    protected CellRendererPane rendererPane;

    public MultilineToolTipUI() {

        super();

    }

    public static ComponentUI createUI(JComponent c) {

        return sharedInstance;

    }

    public void installUI(JComponent c) {

        super.installUI(c);

        tip = (JToolTip) c;

        rendererPane = new CellRendererPane();

        c.add(rendererPane);

    }

    public void uninstallUI(JComponent c) {

        super.uninstallUI(c);

        c.remove(rendererPane);

        rendererPane = null;

    }

    public void paint(Graphics g, JComponent c) {

        Dimension size = c.getSize();

        rendererPane.paintComponent(g, textArea, c, 1, 1, size.width - 1,

            size.height - 1, true);

    }

    /**

     * Overrides a method that is called by the system and,

     * at the same time, creates a nice textarea and displays the tool tip in it.

     */

    public Dimension getPreferredSize(JComponent c) {

        String tipText = ((JToolTip) c).getTipText();

        if (tipText == null) {

            return new Dimension(0, 0);

        }

        textArea = new JTextArea(tipText);

        textArea.setMargin(new Insets(10, 10, 10, 10));

        textArea.setBackground(tip.getBackground());

        rendererPane.removeAll();

        rendererPane.add(textArea);

        textArea.setWrapStyleWord(true);

        textArea.setFont(smallFont);

        int width = ((JMultilineToolTip) c).getFixedWidth();

        int columns = ((JMultilineToolTip) c).getColumns();

        if (columns > 0) {

            textArea.setColumns(columns);

            textArea.setSize(0, 0);

            textArea.setLineWrap(true);

            textArea.setSize(textArea.getPreferredSize());

        }

        else if (width > 0) {

            textArea.setLineWrap(true);

            Dimension d = textArea.getPreferredSize();

            d.width = width;

            d.height++;

            textArea.setSize(d);

        }

        else

        {

            textArea.setLineWrap(false);

        }

        Dimension dim = textArea.getPreferredSize();

        dim.height += 1;

        dim.width += 1;

        return dim;

    }

    public Dimension getMinimumSize(JComponent c) {

        return getPreferredSize(c);

    }

    public Dimension getMaximumSize(JComponent c) {

        return getPreferredSize(c);

    }

}