JPaletteShower.java revision 13978:1993af50385d 
1/*
2 * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package com.sun.swingset3.demos.spinner;
24
25import javax.swing.*;
26import java.awt.*;
27
28/**
29 * @author Mikhail Lapshin
30 */
31public class JPaletteShower extends JComponent {
32
33    private Palette palette;
34
35    public JPaletteShower(Palette palette, int width, int height) {
36        setPreferredSize(new Dimension(width, height));
37        setMinimumSize(new Dimension(width, height));
38        this.palette = palette;
39    }
40
41    @Override
42    protected void paintComponent(Graphics g) {
43        super.paintComponent(g);
44        int w = getSize().width;
45        int h = getSize().height;
46        int maxIndex = palette.getSize() - 1;
47        double rate = (double) maxIndex / w;
48        for (int x = 0; x < w; x++) {
49            g.setColor(palette.getColor((int) (x * rate)));
50            g.fillRect(x, 0, 1, h);
51        }
52    }
53
54    public Palette getPalette() {
55        return palette;
56    }
57
58    public void setPalette(Palette palette) {
59        this.palette = palette;
60        repaint();
61    }
62}
63