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/*
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* Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing.colorchooser;
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import java.awt.Color;
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import java.awt.Graphics;
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import java.awt.Insets;
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import java.awt.event.MouseEvent;
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import java.awt.event.MouseListener;
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import java.awt.event.MouseMotionListener;
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import java.awt.image.BufferedImage;
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import javax.swing.JComponent;
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@SuppressWarnings("serial") // Superclass is not serializable across versions
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final class DiagramComponent extends JComponent implements MouseListener, MouseMotionListener {
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private final ColorPanel panel;
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private final boolean diagram;
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private final Insets insets = new Insets(0, 0, 0, 0);
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private int width;
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private int height;
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private int[] array;
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private BufferedImage image;
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DiagramComponent(ColorPanel panel, boolean diagram) {
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this.panel = panel;
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this.diagram = diagram;
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addMouseListener(this);
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addMouseMotionListener(this);
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}
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@Override
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protected void paintComponent(Graphics g) {
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getInsets(this.insets);
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this.width = getWidth() - this.insets.left - this.insets.right;
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this.height = getHeight() - this.insets.top - this.insets.bottom;
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boolean update = (this.image == null)
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|| (this.width != this.image.getWidth())
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|| (this.height != this.image.getHeight());
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if (update) {
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int size = this.width * this.height;
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if ((this.array == null) || (this.array.length < size)) {
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this.array = new int[size];
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}
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this.image = new BufferedImage(this.width, this.height, BufferedImage.TYPE_INT_RGB);
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}
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{
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float dx = 1.0f / (float) (this.width - 1);
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float dy = 1.0f / (float) (this.height - 1);
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int offset = 0;
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float y = 0.0f;
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for (int h = 0; h < this.height; h++, y += dy) {
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if (this.diagram) {
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float x = 0.0f;
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for (int w = 0; w < this.width; w++, x += dx, offset++) {
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this.array[offset] = this.panel.getColor(x, y);
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}
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}
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else {
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int color = this.panel.getColor(y);
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for (int w = 0; w < this.width; w++, offset++) {
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this.array[offset] = color;
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}
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}
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}
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}
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this.image.setRGB(0, 0, this.width, this.height, this.array, 0, this.width);
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g.drawImage(this.image, this.insets.left, this.insets.top, this.width, this.height, this);
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if (isEnabled()) {
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this.width--;
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this.height--;
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g.setXORMode(Color.WHITE);
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g.setColor(Color.BLACK);
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if (this.diagram) {
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int x = getValue(this.panel.getValueX(), this.insets.left, this.width);
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int y = getValue(this.panel.getValueY(), this.insets.top, this.height);
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g.drawLine(x - 8, y, x + 8, y);
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g.drawLine(x, y - 8, x, y + 8);
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}
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else {
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int z = getValue(this.panel.getValueZ(), this.insets.top, this.height);
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g.drawLine(this.insets.left, z, this.insets.left + this.width, z);
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}
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g.setPaintMode();
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}
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}
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public void mousePressed(MouseEvent event) {
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mouseDragged(event);
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}
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public void mouseReleased(MouseEvent event) {
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}
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public void mouseClicked(MouseEvent event) {
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}
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public void mouseEntered(MouseEvent event) {
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}
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public void mouseExited(MouseEvent event) {
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}
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public void mouseMoved(MouseEvent event) {
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}
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public void mouseDragged(MouseEvent event) {
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if (isEnabled()) {
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float y = getValue(event.getY(), this.insets.top, this.height);
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if (this.diagram) {
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float x = getValue(event.getX(), this.insets.left, this.width);
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this.panel.setValue(x, y);
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}
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else {
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this.panel.setValue(y);
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}
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}
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}
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private static int getValue(float value, int min, int max) {
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return min + (int) (value * (float) (max));
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}
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private static float getValue(int value, int min, int max) {
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if (min < value) {
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value -= min;
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return (value < max)
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? (float) value / (float) max
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: 1.0f;
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}
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return 0.0f;
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}
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}
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