如何只显示 JColorChooser 的 HSV 框？
How do I show only the HSV box of a JColorChooser?
在此图片中，您可以看到默认的 Java Swing 颜色选择器，JColorChooser:
我想要的只是红色框内的颜色方块和垂直滑块：
我能够删除所有选项卡（色板、HSL 等）和预览，但无法删除所有滑块。我该怎么做？
查看 javax.swing.colorchooser internals reveals that ColorChooserComponentFactory creates subclasses of AbstractColorChooserPanel using ColorChooserPanel 和 ColorModel 的合适子类。 ColorChooserPanel 将您想要的部分保存为 DiagramComponent 的两个实例：左侧名为 diagram，右侧名为 slider。
与其从现有 ColorChooserPanel 中删除组件，不如考虑仅包含所需元素的 Creating a Custom Chooser Panel。
class MyChooserPanel extends AbstractColorChooserPanel implements PropertyChangeListener {
private final ColorModel model;
private final DiagramComponent diagram;
private final DiagramComponent slider;
MyChooserPanel(ColorModel model) {
this.model = model;
this.diagram = new DiagramComponent(this.panel, true);
this.slider = new DiagramComponent(this.panel, false);
}
…
}
当然，您必须重述一些（包）私有代码，但结果会不那么脆弱。
我的解决方案：
colorChooser.setPreviewPanel(new JPanel());
AbstractColorChooserPanel[] panels = colorChooser.getChooserPanels();
for (AbstractColorChooserPanel accp : panels) {
if(!accp.getDisplayName().equals("HSV")) {
colorChooser.removeChooserPanel(accp);
}
}
JComponent current = (JComponent) colorChooser.getComponents()[0];
while( !current.getClass().toString().equals( "class javax.swing.colorchooser.ColorChooserPanel" ) ){
current = (JComponent) current.getComponents()[0];
}
for(Component jc : current.getComponents()){
if(!jc.getClass().toString().equals( "class javax.swing.colorchooser.DiagramComponent" )){
current.remove(jc);
}
}
这会删除我不想要的所有内容，但我认为定制一个会是更好的解决方案。
我打算试试 trashgod 的，看看它是否更好用。
您可以使用 Swing Utils class 在面板上搜索给定类型的组件。
在下面的示例中，您可以找到所有滑块，然后使它们不可见：
import java.awt.*;
import java.util.List;
import javax.swing.*;
import javax.swing.colorchooser.*;
public class ColorChooserPanel extends JPanel
{
ColorChooserPanel()
{
JColorChooser chooser = new JColorChooser();
AbstractColorChooserPanel[] panels = chooser.getChooserPanels();
for (AbstractColorChooserPanel panel: panels)
{
if ("HSL".equals(panel.getDisplayName()))
{
add( panel );
List<JSlider> sliders = SwingUtils.getDescendantsOfType(JSlider.class, panel, true);
for (JSlider slider: sliders)
{
slider.setVisible( false );
}
}
}
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("ColorChooserPanel");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new ColorChooserPanel());
frame.pack();
frame.setLocationByPlatform( true );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater( () -> createAndShowGUI() );
/*
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
*/
}
}
好吧，为了开心，我决定从头开始创建您想要的 JPanel，将其连接到一种 View-Controller 设置中，因为这里的模型很简单——控制器中的一个 Color 字段。要使用此组件，您需要创建该组件的一个实例，将其添加到需要的 GUI 中，然后简单地向其添加一个 PropertyChangeListener 以监听其 COLOR 属性:
hsvChooserPanel.addPropertyChangeListener(HsvChooserPanel.COLOR, pce -> {
Color c = (Color) pce.getNewValue();
// do what you want with Color value, c, here
});
测试class:
版本 2：这允许使用 HSV panel/bar 组合中的任意 3 种，可以是带有侧重于色相、饱和度或值（此处为亮度）的条的组合。它使用具有 3 个值的枚举 ColorProperty，ColorProperty.HUE、ColorProperty.SATURATION 和 ColorProperty.BRIGHTNESS，并在枚举项本身内计算如何创建颜色条和颜色方形缓冲图像。欢迎评论：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class TestHsvChooser2 {
// ***** choose which color panel / color bar you'd like to test:
// private static final ColorProperty COLOR_PROP = ColorProperty.HUE;
// private static final ColorProperty COLOR_PROP = ColorProperty.BRIGHTNESS;
private static final ColorProperty COLOR_PROP = ColorProperty.SATURATION;
private static void createAndShowGui() {
HsvChooserPanel2 hsvChooserPanel = new HsvChooserPanel2(COLOR_PROP);
JPanel testPanel = new JPanel();
JPanel outerPanel = new JPanel(new BorderLayout());
outerPanel.add(testPanel);
outerPanel.setBorder(BorderFactory.createTitledBorder("Test Panel"));
hsvChooserPanel.addPropertyChangeListener(HsvChooserPanel2.COLOR, pce -> {
Color c = (Color) pce.getNewValue();
testPanel.setBackground(c);
});
JPanel gridPanel = new JPanel(new GridLayout(0, 1, 10, 10));
gridPanel.add(hsvChooserPanel);
gridPanel.add(outerPanel);
JFrame frame = new JFrame("HSV Chooser");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(gridPanel);
frame.setResizable(false);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
}
整个shebang：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.event.SwingPropertyChangeSupport;
@SuppressWarnings("serial")
public class HsvChooserPanel2 extends JPanel {
public static final String COLOR = "color";
private static final int PREF_W = 180;
private static final int PREF_H = PREF_W;
private static final int PREF_W_CB = 20;
private static final int GAP = 10;
private MyColorPanel2 colorPanel = null;
private MyColorBar2 colorBar = null;
private InnerControl2 innerControl = null;
public HsvChooserPanel2(ColorProperty colorProp) {
colorPanel = new MyColorPanel2(PREF_W, PREF_H, colorProp);
colorBar = new MyColorBar2(PREF_W_CB, PREF_H, colorProp);
innerControl = new InnerControl2(this, colorPanel, colorBar);
colorPanel.setColorPropertyValue(Color.RED); // !! magic value
setLayout(new BorderLayout(GAP, GAP));
setBorder(BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
add(colorPanel, BorderLayout.CENTER);
add(colorBar, BorderLayout.LINE_END);
// propagate COLOR changes in the inner controller
// to this component's property change support
innerControl.addPropertyChangeListener(COLOR, pce -> {
firePropertyChange(COLOR, pce.getOldValue(), pce.getNewValue());
});
}
}
// listens for changes to both the color bar and the color panel
class InnerControl2 {
private SwingPropertyChangeSupport pcSupport = new SwingPropertyChangeSupport(this);
private HsvChooserPanel2 hsvChooser;
private MyColorPanel2 colorPanel;
private MyColorBar2 colorBar;
private Color color; // This is all there is to the model, a "bound"
// property
public InnerControl2(HsvChooserPanel2 hsvChooser, MyColorPanel2 colorPanel, MyColorBar2 colorBar) {
this.hsvChooser = hsvChooser;
this.colorPanel = colorPanel;
this.colorBar = colorBar;
// listen for changes
colorPanel.addPropertyChangeListener(ColorPanelParent.CURSOR, new ColorPanelListener());
colorBar.addPropertyChangeListener(ColorPanelParent.CURSOR, new ColorBarListener());
}
public Color getColor() {
return color;
}
// classic setter method for a "bound" property
public void setColor(Color color) {
Color oldValue = this.color;
Color newValue = color;
this.color = color;
// notify listeners of the change
pcSupport.firePropertyChange(HsvChooserPanel2.COLOR, oldValue, newValue);
}
// allow outside classes the ability to listen
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
public void addPropertyChangeListener(String name, PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(name, listener);
}
public void removePropertyChangeListener(String name, PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(name, listener);
}
public HsvChooserPanel2 getHsvChooser() {
return hsvChooser;
}
// inner listeners
private class ColorPanelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
Point p = colorPanel.getCursorP();
Color c = colorPanel.getColor(p);
colorBar.setColorPropertyValue(c);
setColor(c); // this will fire the prop change
// support
}
}
private class ColorBarListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
// get hue from the color bar and use it to set the main hue
// of the color panel
Point p = colorBar.getCursorP();
Color c = colorBar.getColor(p);
colorPanel.setColorPropertyValue(c);
}
}
}
// parent of both color bar panel and color panel
@SuppressWarnings("serial")
abstract class ColorPanelParent extends JPanel {
public static final String CURSOR = "cursor";
private int prefW;
private int prefH;
private Point cursorP = new Point(0, 0);
private BufferedImage img = null;
private ColorProperty colorProperty;
private boolean panel;
public ColorPanelParent(int prefW, int prefH, ColorProperty colorProperty, boolean panel) {
this.prefW = prefW;
this.prefH = prefH;
this.colorProperty = colorProperty;
this.panel = panel;
MyMouse myMouse = new MyMouse();
addMouseListener(myMouse);
addMouseMotionListener(myMouse);
setBorder(BorderFactory.createLineBorder(Color.BLACK));
}
@Override
public Dimension getPreferredSize() {
if (isPreferredSizeSet()) {
return super.getPreferredSize();
}
return new Dimension(prefW, prefH);
}
public int getPrefH() {
return prefH;
}
public int getPrefW() {
return prefW;
}
public ColorProperty getColorProperty() {
return colorProperty;
}
public BufferedImage getImg() {
return img;
}
public Point getCursorP() {
return cursorP;
}
public void setImg(BufferedImage img) {
this.img = img;
repaint();
}
public Color getColor(Point p) {
Color c = null;
if (getImg() != null) {
int rgb = getImg().getRGB(p.x, p.y);
c = new Color(rgb);
}
return c;
}
// when the main hue is changed, we have to create a new
// background image to reflect the new main color
public void setColorPropertyValue(Color color) {
int w = getPrefW();
int h = getPrefH();
BufferedImage img = getColorProperty().createImage(color, w, h, panel);
setImg(img);
repaint();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (img != null) {
g.drawImage(img, 0, 0, this);
}
}
// change the cursor point and then
// notify prop change support of changes
private class MyMouse extends MouseAdapter {
@Override
public void mousePressed(MouseEvent e) {
mouseResponse(e);
}
@Override
public void mouseDragged(MouseEvent e) {
mouseResponse(e);
}
private void mouseResponse(MouseEvent e) {
int x = e.getX();
int y = e.getY();
if (!contains(e.getPoint())) {
x = Math.max(0, x);
x = Math.min(prefW - 1, x);
y = Math.max(0, y);
y = Math.min(prefH - 1, y);
}
Point oldValue = cursorP;
cursorP = new Point(x, y);
firePropertyChange(CURSOR, oldValue, cursorP);
repaint();
}
}
}
// color bar on the right side of the HsvChooser JPanel.
// Controller action: Changing selection point on this JPanel
// will change the hue of the color panel
@SuppressWarnings("serial")
class MyColorBar2 extends ColorPanelParent {
public MyColorBar2(int prefW, int prefH, ColorProperty colorProperty) {
super(prefW, prefH, colorProperty, false);
// create and set the background image
setColorPropertyValue(Color.RED); // fix the magic number?
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); // draws the background image
// this draws a line at the cursor's location
g.setXORMode(Color.WHITE);
int y = getCursorP().y;
g.drawLine(0, y, getPrefW(), y);
}
}
// color panel on the left side of the HsvChooser JPanel.
// Controller action: Changing selection point on this JPanel
// will notify listeners of a new COLOR selection
@SuppressWarnings("serial")
class MyColorPanel2 extends ColorPanelParent {
private static final int CURSOR_RADIUS = 8;
public MyColorPanel2(int prefW, int prefH, ColorProperty colorProperty) {
super(prefW, prefH, colorProperty, true);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); // draws the background image
// draws the cross hatch indicating color selection point
g.setXORMode(Color.WHITE);
int x = getCursorP().x;
int y = getCursorP().y;
int x1 = x - CURSOR_RADIUS;
int y1 = y - CURSOR_RADIUS;
int x2 = x + CURSOR_RADIUS;
int y2 = y + CURSOR_RADIUS;
g.drawLine(x1, y, x2, y);
g.drawLine(x, y1, x, y2);
}
}
enum ColorProperty {
HUE {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
if (panel) {
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float hue = Color.RGBtoHSB(red, green, blue, null)[0];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float s = ((float) j) / (float) w;
float b = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, s, b).getRGB();
img.setRGB(j, i, rgb);
}
}
} else {
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, 1f, 1f).getRGB();
img.setRGB(j, i, rgb);
}
}
}
return img;
}
},
SATURATION {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float[] hsb = Color.RGBtoHSB(red, green, blue, null);
return panel ? createPanelImg(w, h, img, hsb) : createBarImg(w, h, img, hsb);
}
private BufferedImage createBarImg(int w, int h, BufferedImage img, float[] hsb) {
float hue = hsb[0];
// float brightness = hsb[2];
float brightness = 1f;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float saturation = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
private BufferedImage createPanelImg(int w, int h, BufferedImage img, float[] hsb) {
float saturation = hsb[1];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = ((float) j) / (float) w;
float b = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, b).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
},
BRIGHTNESS {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float[] hsb = Color.RGBtoHSB(red, green, blue, null);
return panel ? createPanelImg(w, h, img, hsb) : createBarImg(w, h, img, hsb);
}
private BufferedImage createBarImg(int w, int h, BufferedImage img, float[] hsb) {
float hue = hsb[0];
// float saturation = hsb[1];
float saturation = 1f;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float brightness = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
private BufferedImage createPanelImg(int w, int h, BufferedImage img, float[] hsb) {
float brightness = hsb[2];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = ((float) j) / (float) w;
float saturation = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
};
public abstract BufferedImage createImage(Color color, int w, int h, boolean panel);
}
在此图片中，您可以看到默认的 Java Swing 颜色选择器，JColorChooser:
我想要的只是红色框内的颜色方块和垂直滑块：
我能够删除所有选项卡（色板、HSL 等）和预览，但无法删除所有滑块。我该怎么做？
查看 javax.swing.colorchooser internals reveals that ColorChooserComponentFactory creates subclasses of AbstractColorChooserPanel using ColorChooserPanel 和 ColorModel 的合适子类。 ColorChooserPanel 将您想要的部分保存为 DiagramComponent 的两个实例：左侧名为 diagram，右侧名为 slider。
与其从现有 ColorChooserPanel 中删除组件，不如考虑仅包含所需元素的 Creating a Custom Chooser Panel。
class MyChooserPanel extends AbstractColorChooserPanel implements PropertyChangeListener {
private final ColorModel model;
private final DiagramComponent diagram;
private final DiagramComponent slider;
MyChooserPanel(ColorModel model) {
this.model = model;
this.diagram = new DiagramComponent(this.panel, true);
this.slider = new DiagramComponent(this.panel, false);
}
…
}
当然，您必须重述一些（包）私有代码，但结果会不那么脆弱。
我的解决方案：
colorChooser.setPreviewPanel(new JPanel());
AbstractColorChooserPanel[] panels = colorChooser.getChooserPanels();
for (AbstractColorChooserPanel accp : panels) {
if(!accp.getDisplayName().equals("HSV")) {
colorChooser.removeChooserPanel(accp);
}
}
JComponent current = (JComponent) colorChooser.getComponents()[0];
while( !current.getClass().toString().equals( "class javax.swing.colorchooser.ColorChooserPanel" ) ){
current = (JComponent) current.getComponents()[0];
}
for(Component jc : current.getComponents()){
if(!jc.getClass().toString().equals( "class javax.swing.colorchooser.DiagramComponent" )){
current.remove(jc);
}
}
这会删除我不想要的所有内容，但我认为定制一个会是更好的解决方案。
我打算试试 trashgod 的，看看它是否更好用。
您可以使用 Swing Utils class 在面板上搜索给定类型的组件。
在下面的示例中，您可以找到所有滑块，然后使它们不可见：
import java.awt.*;
import java.util.List;
import javax.swing.*;
import javax.swing.colorchooser.*;
public class ColorChooserPanel extends JPanel
{
ColorChooserPanel()
{
JColorChooser chooser = new JColorChooser();
AbstractColorChooserPanel[] panels = chooser.getChooserPanels();
for (AbstractColorChooserPanel panel: panels)
{
if ("HSL".equals(panel.getDisplayName()))
{
add( panel );
List<JSlider> sliders = SwingUtils.getDescendantsOfType(JSlider.class, panel, true);
for (JSlider slider: sliders)
{
slider.setVisible( false );
}
}
}
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("ColorChooserPanel");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new ColorChooserPanel());
frame.pack();
frame.setLocationByPlatform( true );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater( () -> createAndShowGUI() );
/*
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
*/
}
}
好吧，为了开心，我决定从头开始创建您想要的 JPanel，将其连接到一种 View-Controller 设置中，因为这里的模型很简单——控制器中的一个 Color 字段。要使用此组件，您需要创建该组件的一个实例，将其添加到需要的 GUI 中，然后简单地向其添加一个 PropertyChangeListener 以监听其 COLOR 属性:
hsvChooserPanel.addPropertyChangeListener(HsvChooserPanel.COLOR, pce -> {
Color c = (Color) pce.getNewValue();
// do what you want with Color value, c, here
});
测试class:
版本 2：这允许使用 HSV panel/bar 组合中的任意 3 种，可以是带有侧重于色相、饱和度或值（此处为亮度）的条的组合。它使用具有 3 个值的枚举 ColorProperty，ColorProperty.HUE、ColorProperty.SATURATION 和 ColorProperty.BRIGHTNESS，并在枚举项本身内计算如何创建颜色条和颜色方形缓冲图像。欢迎评论：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class TestHsvChooser2 {
// ***** choose which color panel / color bar you'd like to test:
// private static final ColorProperty COLOR_PROP = ColorProperty.HUE;
// private static final ColorProperty COLOR_PROP = ColorProperty.BRIGHTNESS;
private static final ColorProperty COLOR_PROP = ColorProperty.SATURATION;
private static void createAndShowGui() {
HsvChooserPanel2 hsvChooserPanel = new HsvChooserPanel2(COLOR_PROP);
JPanel testPanel = new JPanel();
JPanel outerPanel = new JPanel(new BorderLayout());
outerPanel.add(testPanel);
outerPanel.setBorder(BorderFactory.createTitledBorder("Test Panel"));
hsvChooserPanel.addPropertyChangeListener(HsvChooserPanel2.COLOR, pce -> {
Color c = (Color) pce.getNewValue();
testPanel.setBackground(c);
});
JPanel gridPanel = new JPanel(new GridLayout(0, 1, 10, 10));
gridPanel.add(hsvChooserPanel);
gridPanel.add(outerPanel);
JFrame frame = new JFrame("HSV Chooser");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(gridPanel);
frame.setResizable(false);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
}
整个shebang：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.event.SwingPropertyChangeSupport;
@SuppressWarnings("serial")
public class HsvChooserPanel2 extends JPanel {
public static final String COLOR = "color";
private static final int PREF_W = 180;
private static final int PREF_H = PREF_W;
private static final int PREF_W_CB = 20;
private static final int GAP = 10;
private MyColorPanel2 colorPanel = null;
private MyColorBar2 colorBar = null;
private InnerControl2 innerControl = null;
public HsvChooserPanel2(ColorProperty colorProp) {
colorPanel = new MyColorPanel2(PREF_W, PREF_H, colorProp);
colorBar = new MyColorBar2(PREF_W_CB, PREF_H, colorProp);
innerControl = new InnerControl2(this, colorPanel, colorBar);
colorPanel.setColorPropertyValue(Color.RED); // !! magic value
setLayout(new BorderLayout(GAP, GAP));
setBorder(BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
add(colorPanel, BorderLayout.CENTER);
add(colorBar, BorderLayout.LINE_END);
// propagate COLOR changes in the inner controller
// to this component's property change support
innerControl.addPropertyChangeListener(COLOR, pce -> {
firePropertyChange(COLOR, pce.getOldValue(), pce.getNewValue());
});
}
}
// listens for changes to both the color bar and the color panel
class InnerControl2 {
private SwingPropertyChangeSupport pcSupport = new SwingPropertyChangeSupport(this);
private HsvChooserPanel2 hsvChooser;
private MyColorPanel2 colorPanel;
private MyColorBar2 colorBar;
private Color color; // This is all there is to the model, a "bound"
// property
public InnerControl2(HsvChooserPanel2 hsvChooser, MyColorPanel2 colorPanel, MyColorBar2 colorBar) {
this.hsvChooser = hsvChooser;
this.colorPanel = colorPanel;
this.colorBar = colorBar;
// listen for changes
colorPanel.addPropertyChangeListener(ColorPanelParent.CURSOR, new ColorPanelListener());
colorBar.addPropertyChangeListener(ColorPanelParent.CURSOR, new ColorBarListener());
}
public Color getColor() {
return color;
}
// classic setter method for a "bound" property
public void setColor(Color color) {
Color oldValue = this.color;
Color newValue = color;
this.color = color;
// notify listeners of the change
pcSupport.firePropertyChange(HsvChooserPanel2.COLOR, oldValue, newValue);
}
// allow outside classes the ability to listen
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
public void addPropertyChangeListener(String name, PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(name, listener);
}
public void removePropertyChangeListener(String name, PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(name, listener);
}
public HsvChooserPanel2 getHsvChooser() {
return hsvChooser;
}
// inner listeners
private class ColorPanelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
Point p = colorPanel.getCursorP();
Color c = colorPanel.getColor(p);
colorBar.setColorPropertyValue(c);
setColor(c); // this will fire the prop change
// support
}
}
private class ColorBarListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
// get hue from the color bar and use it to set the main hue
// of the color panel
Point p = colorBar.getCursorP();
Color c = colorBar.getColor(p);
colorPanel.setColorPropertyValue(c);
}
}
}
// parent of both color bar panel and color panel
@SuppressWarnings("serial")
abstract class ColorPanelParent extends JPanel {
public static final String CURSOR = "cursor";
private int prefW;
private int prefH;
private Point cursorP = new Point(0, 0);
private BufferedImage img = null;
private ColorProperty colorProperty;
private boolean panel;
public ColorPanelParent(int prefW, int prefH, ColorProperty colorProperty, boolean panel) {
this.prefW = prefW;
this.prefH = prefH;
this.colorProperty = colorProperty;
this.panel = panel;
MyMouse myMouse = new MyMouse();
addMouseListener(myMouse);
addMouseMotionListener(myMouse);
setBorder(BorderFactory.createLineBorder(Color.BLACK));
}
@Override
public Dimension getPreferredSize() {
if (isPreferredSizeSet()) {
return super.getPreferredSize();
}
return new Dimension(prefW, prefH);
}
public int getPrefH() {
return prefH;
}
public int getPrefW() {
return prefW;
}
public ColorProperty getColorProperty() {
return colorProperty;
}
public BufferedImage getImg() {
return img;
}
public Point getCursorP() {
return cursorP;
}
public void setImg(BufferedImage img) {
this.img = img;
repaint();
}
public Color getColor(Point p) {
Color c = null;
if (getImg() != null) {
int rgb = getImg().getRGB(p.x, p.y);
c = new Color(rgb);
}
return c;
}
// when the main hue is changed, we have to create a new
// background image to reflect the new main color
public void setColorPropertyValue(Color color) {
int w = getPrefW();
int h = getPrefH();
BufferedImage img = getColorProperty().createImage(color, w, h, panel);
setImg(img);
repaint();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (img != null) {
g.drawImage(img, 0, 0, this);
}
}
// change the cursor point and then
// notify prop change support of changes
private class MyMouse extends MouseAdapter {
@Override
public void mousePressed(MouseEvent e) {
mouseResponse(e);
}
@Override
public void mouseDragged(MouseEvent e) {
mouseResponse(e);
}
private void mouseResponse(MouseEvent e) {
int x = e.getX();
int y = e.getY();
if (!contains(e.getPoint())) {
x = Math.max(0, x);
x = Math.min(prefW - 1, x);
y = Math.max(0, y);
y = Math.min(prefH - 1, y);
}
Point oldValue = cursorP;
cursorP = new Point(x, y);
firePropertyChange(CURSOR, oldValue, cursorP);
repaint();
}
}
}
// color bar on the right side of the HsvChooser JPanel.
// Controller action: Changing selection point on this JPanel
// will change the hue of the color panel
@SuppressWarnings("serial")
class MyColorBar2 extends ColorPanelParent {
public MyColorBar2(int prefW, int prefH, ColorProperty colorProperty) {
super(prefW, prefH, colorProperty, false);
// create and set the background image
setColorPropertyValue(Color.RED); // fix the magic number?
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); // draws the background image
// this draws a line at the cursor's location
g.setXORMode(Color.WHITE);
int y = getCursorP().y;
g.drawLine(0, y, getPrefW(), y);
}
}
// color panel on the left side of the HsvChooser JPanel.
// Controller action: Changing selection point on this JPanel
// will notify listeners of a new COLOR selection
@SuppressWarnings("serial")
class MyColorPanel2 extends ColorPanelParent {
private static final int CURSOR_RADIUS = 8;
public MyColorPanel2(int prefW, int prefH, ColorProperty colorProperty) {
super(prefW, prefH, colorProperty, true);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); // draws the background image
// draws the cross hatch indicating color selection point
g.setXORMode(Color.WHITE);
int x = getCursorP().x;
int y = getCursorP().y;
int x1 = x - CURSOR_RADIUS;
int y1 = y - CURSOR_RADIUS;
int x2 = x + CURSOR_RADIUS;
int y2 = y + CURSOR_RADIUS;
g.drawLine(x1, y, x2, y);
g.drawLine(x, y1, x, y2);
}
}
enum ColorProperty {
HUE {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
if (panel) {
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float hue = Color.RGBtoHSB(red, green, blue, null)[0];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float s = ((float) j) / (float) w;
float b = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, s, b).getRGB();
img.setRGB(j, i, rgb);
}
}
} else {
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, 1f, 1f).getRGB();
img.setRGB(j, i, rgb);
}
}
}
return img;
}
},
SATURATION {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float[] hsb = Color.RGBtoHSB(red, green, blue, null);
return panel ? createPanelImg(w, h, img, hsb) : createBarImg(w, h, img, hsb);
}
private BufferedImage createBarImg(int w, int h, BufferedImage img, float[] hsb) {
float hue = hsb[0];
// float brightness = hsb[2];
float brightness = 1f;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float saturation = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
private BufferedImage createPanelImg(int w, int h, BufferedImage img, float[] hsb) {
float saturation = hsb[1];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = ((float) j) / (float) w;
float b = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, b).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
},
BRIGHTNESS {
@Override
public BufferedImage createImage(Color color, int w, int h, boolean panel) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
// float array is HSB
float[] hsb = Color.RGBtoHSB(red, green, blue, null);
return panel ? createPanelImg(w, h, img, hsb) : createBarImg(w, h, img, hsb);
}
private BufferedImage createBarImg(int w, int h, BufferedImage img, float[] hsb) {
float hue = hsb[0];
// float saturation = hsb[1];
float saturation = 1f;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float brightness = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
private BufferedImage createPanelImg(int w, int h, BufferedImage img, float[] hsb) {
float brightness = hsb[2];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float hue = ((float) j) / (float) w;
float saturation = (h - (float) i) / (float) h;
int rgb = Color.getHSBColor(hue, saturation, brightness).getRGB();
img.setRGB(j, i, rgb);
}
}
return img;
}
};
public abstract BufferedImage createImage(Color color, int w, int h, boolean panel);
}