1 /*
2 * Copyright (c) 2008, 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 final class DiagramComponent extends JComponent implements MouseListener, MouseMotionListener {
38
39 private final ColorPanel panel;
40 private final boolean diagram;
41
42 private final Insets insets = new Insets(0, 0, 0, 0);
43
44 private int width;
45 private int height;
46
47 private int[] array;
48 private BufferedImage image;
49
50 DiagramComponent(ColorPanel panel, boolean diagram) {
51 this.panel = panel;
52 this.diagram = diagram;
53 addMouseListener(this);
54 addMouseMotionListener(this);
55 }
56
57 @Override
58 protected void paintComponent(Graphics g) {
59 getInsets(this.insets);
60 this.width = getWidth() - this.insets.left - this.insets.right;
61 this.height = getHeight() - this.insets.top - this.insets.bottom;
62
63 boolean update = (this.image == null)
64 || (this.width != this.image.getWidth())
65 || (this.height != this.image.getHeight());
66 if (update) {
67 int size = this.width * this.height;
68 if ((this.array == null) || (this.array.length < size)) {
69 this.array = new int[size];
70 }
71 this.image = new BufferedImage(this.width, this.height, BufferedImage.TYPE_INT_RGB);
72 }
73 {
74 float dx = 1.0f / (float) (this.width - 1);
75 float dy = 1.0f / (float) (this.height - 1);
76
77 int offset = 0;
78 float y = 0.0f;
79 for (int h = 0; h < this.height; h++, y += dy) {
80 if (this.diagram) {
81 float x = 0.0f;
82 for (int w = 0; w < this.width; w++, x += dx, offset++) {
83 this.array[offset] = this.panel.getColor(x, y);
84 }
85 }
86 else {
87 int color = this.panel.getColor(y);
88 for (int w = 0; w < this.width; w++, offset++) {
89 this.array[offset] = color;
90 }
91 }
92 }
93 }
94 this.image.setRGB(0, 0, this.width, this.height, this.array, 0, this.width);
95 g.drawImage(this.image, this.insets.left, this.insets.top, this.width, this.height, this);
96 if (isEnabled()) {
97 this.width--;
98 this.height--;
99 g.setXORMode(Color.WHITE);
100 g.setColor(Color.BLACK);
101 if (this.diagram) {
102 int x = getValue(this.panel.getValueX(), this.insets.left, this.width);
103 int y = getValue(this.panel.getValueY(), this.insets.top, this.height);
104 g.drawLine(x - 8, y, x + 8, y);
105 g.drawLine(x, y - 8, x, y + 8);
106 }
107 else {
108 int z = getValue(this.panel.getValueZ(), this.insets.top, this.height);
109 g.drawLine(this.insets.left, z, this.insets.left + this.width, z);
110 }
111 g.setPaintMode();
112 }
113 }
114
115 public void mousePressed(MouseEvent event) {
116 mouseDragged(event);
117 }
118
119 public void mouseReleased(MouseEvent event) {
120 }
121
122 public void mouseClicked(MouseEvent event) {
123 }
124
125 public void mouseEntered(MouseEvent event) {
126 }
127
128 public void mouseExited(MouseEvent event) {
129 }
130
131 public void mouseMoved(MouseEvent event) {
132 }
133
134 public void mouseDragged(MouseEvent event) {
135 if (isEnabled()) {
136 float y = getValue(event.getY(), this.insets.top, this.height);
137 if (this.diagram) {
138 float x = getValue(event.getX(), this.insets.left, this.width);
139 this.panel.setValue(x, y);
140 }
141 else {
142 this.panel.setValue(y);
143 }
144 }
145 }
146
147 private static int getValue(float value, int min, int max) {
148 return min + (int) (value * (float) (max));
149 }
150
151 private static float getValue(int value, int min, int max) {
152 if (min < value) {
153 value -= min;
154 return (value < max)
155 ? (float) value / (float) max
156 : 1.0f;
157 }
158 return 0.0f;
159 }
160 }