1 /*
2 * Copyright (c) 2008, 2014, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javax.swing.colorchooser;
27
28 import java.awt.Color;
29 import java.awt.Graphics;
30 import java.awt.Insets;
31 import java.awt.event.MouseEvent;
32 import java.awt.event.MouseListener;
33 import java.awt.event.MouseMotionListener;
34 import java.awt.image.BufferedImage;
35 import javax.swing.JComponent;
36
37 @SuppressWarnings("serial") // Superclass is not serializable across versions
38 final class DiagramComponent extends JComponent implements MouseListener, MouseMotionListener {
39
40 private final ColorPanel panel;
41 private final boolean diagram;
42
43 private final Insets insets = new Insets(0, 0, 0, 0);
44
45 private int width;
46 private int height;
47
48 private int[] array;
49 private BufferedImage image;
50
51 DiagramComponent(ColorPanel panel, boolean diagram) {
52 this.panel = panel;
53 this.diagram = diagram;
54 addMouseListener(this);
55 addMouseMotionListener(this);
56 }
57
58 @Override
59 protected void paintComponent(Graphics g) {
60 getInsets(this.insets);
61 this.width = getWidth() - this.insets.left - this.insets.right;
62 this.height = getHeight() - this.insets.top - this.insets.bottom;
63
64 boolean update = (this.image == null)
65 || (this.width != this.image.getWidth())
66 || (this.height != this.image.getHeight());
67 if (update) {
68 int size = this.width * this.height;
69 if ((this.array == null) || (this.array.length < size)) {
70 this.array = new int[size];
71 }
72 this.image = new BufferedImage(this.width, this.height, BufferedImage.TYPE_INT_RGB);
73 }
74 {
75 float dx = 1.0f / (float) (this.width - 1);
76 float dy = 1.0f / (float) (this.height - 1);
77
78 int offset = 0;
79 float y = 0.0f;
80 for (int h = 0; h < this.height; h++, y += dy) {
81 if (this.diagram) {
82 float x = 0.0f;
83 for (int w = 0; w < this.width; w++, x += dx, offset++) {
84 this.array[offset] = this.panel.getColor(x, y);
85 }
86 }
87 else {
88 int color = this.panel.getColor(y);
89 for (int w = 0; w < this.width; w++, offset++) {
90 this.array[offset] = color;
91 }
92 }
93 }
94 }
95 this.image.setRGB(0, 0, this.width, this.height, this.array, 0, this.width);
96 g.drawImage(this.image, this.insets.left, this.insets.top, this.width, this.height, this);
97 if (isEnabled()) {
98 this.width--;
99 this.height--;
100 g.setXORMode(Color.WHITE);
101 g.setColor(Color.BLACK);
102 if (this.diagram) {
103 int x = getValue(this.panel.getValueX(), this.insets.left, this.width);
104 int y = getValue(this.panel.getValueY(), this.insets.top, this.height);
105 g.drawLine(x - 8, y, x + 8, y);
106 g.drawLine(x, y - 8, x, y + 8);
107 }
108 else {
109 int z = getValue(this.panel.getValueZ(), this.insets.top, this.height);
110 g.drawLine(this.insets.left, z, this.insets.left + this.width, z);
111 }
112 g.setPaintMode();
113 }
114 }
115
116 public void mousePressed(MouseEvent event) {
117 mouseDragged(event);
118 }
119
120 public void mouseReleased(MouseEvent event) {
121 }
122
123 public void mouseClicked(MouseEvent event) {
124 }
125
126 public void mouseEntered(MouseEvent event) {
127 }
128
129 public void mouseExited(MouseEvent event) {
130 }
131
132 public void mouseMoved(MouseEvent event) {
133 }
134
135 public void mouseDragged(MouseEvent event) {
136 if (isEnabled()) {
137 float y = getValue(event.getY(), this.insets.top, this.height);
138 if (this.diagram) {
139 float x = getValue(event.getX(), this.insets.left, this.width);
140 this.panel.setValue(x, y);
141 }
142 else {
143 this.panel.setValue(y);
144 }
145 }
146 }
147
148 private static int getValue(float value, int min, int max) {
149 return min + (int) (value * (float) (max));
150 }
151
152 private static float getValue(int value, int min, int max) {
153 if (min < value) {
154 value -= min;
155 return (value < max)
156 ? (float) value / (float) max
157 : 1.0f;
158 }
159 return 0.0f;
160 }
161 }