Application: gvSIG desktop » Library: org.gvsig.tools

package org.gvsig.tools.swing.impl;

import java.awt.Color;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.LinearGradientPaint;

import java.awt.Paint;

import java.awt.geom.Point2D;

import javax.swing.BorderFactory;

import javax.swing.Icon;

import javax.swing.JLabel;

import javax.swing.UIManager;

/*

 * Based on portions of code from java.awt.geom.TitledSeparator of the

 * aterai/java-swing-tips project (Copyright (c) 2015 TERAI Atsuhiro)

 * https://github.com/aterai/java-swing-tips/tree/master/TitledSeparator

 */

public class TitledSeparator extends JLabel {

    private Color color;

    private final String title;

    private final Color target;

    private final int height;

    private final int titlePosition;

    private final int titleJustification;

    public TitledSeparator(String title, int height, int titlePosition, int titleJustification) {

        this(title, null, height, titlePosition, titleJustification);

    }

    public TitledSeparator(

            String _title, Color _target, int _height, int _titlePosition, int _titleJustification) {

        super();

        this.title = _title;

        this.target = _target;

        this.height = _height;

        this.titlePosition = _titlePosition;

        this.titleJustification = _titleJustification;

        Icon icon = new Icon() {

            private int width = -1;

            private Paint painter1, painter2;

            @Override

            public void paintIcon(Component c, Graphics g, int x, int y) {

                int w = c.getWidth();

                if (w != width || painter1 == null || painter2 == null || color == null) {

                    width = w;

                    Point2D start = new Point2D.Float(0f, 0f);

                    Point2D end = new Point2D.Float((float) width, 0f);

                    float[] dist = {0.0f, 1.0f};

                    color = getBackground();

                    color = color == null ? UIManager.getColor("Panel.background") : color;

                    Color tc = target == null ? color : target;

                    painter1 = new LinearGradientPaint(

                            start, end, dist, new Color[]{tc.darker(), color});

                    painter2 = new LinearGradientPaint(

                            start, end, dist, new Color[]{tc.brighter(), color});

                }

                int h = getIconHeight() / 2;

                Graphics2D g2 = (Graphics2D) g.create();

                g2.setPaint(painter1);

                g2.fillRect(x, y, width, getIconHeight());

                g2.setPaint(painter2);

                g2.fillRect(x, y + h, width, getIconHeight() - h);

                g2.dispose();

            }

            @Override

            public int getIconWidth() {

                return 200;

            } //dummy width

            @Override

            public int getIconHeight() {

                return height;

            }

        };

        this.setBorder(BorderFactory.createTitledBorder(

                BorderFactory.createMatteBorder(height, 0, 0, 0, icon), title,

                titleJustification, titlePosition));

    }

    @Override

    public Dimension getMaximumSize() {

        Dimension d = super.getPreferredSize();

        d.width = Short.MAX_VALUE;

        return d;

    }

    @Override

    public void updateUI() {

        super.updateUI();

        color = null;

    }

}