Java：平滑颜色转换
我正在尝试制作一个Java：平滑颜色转换,java,animation,colors,transitions,Java,Animation,Colors,Transitions,我正在尝试制作一个健康栏，它可能是原创的，它会以绿色开始，失去健康后，你会发现它会变成黄色，然后是橙色，然后是红色。。或者与之相关的东西 我尝试使用此链接中提供的方法： 该链接的结果是这个代码，只是从值100到0的测试，但它在正常情况下以红色和绿色结束，并且我猜测原因是它超过了255的值 Color to = Color.red; Color base = Color.green; int red = (int)Math.abs((100 * to.getRed()) + ((1 - 100)
健康栏Color to = Color.red;
Color base = Color.green;
int red = (int)Math.abs((100 * to.getRed()) + ((1 - 100) * base.getRed()));
int green = (int)Math.abs((100 * to.getGreen()) + ((1 - 100) * base.getGreen()));
int blue = (int)Math.abs((100 * to.getBlue()) + ((1 - 100) * base.getBlue()));
setForeground(new Color(red, green, blue));
transitionHealthBarupdate（）public void update() {
if (getValue() < 10) setForeground(Color.red);
else if (getValue() < 25) setForeground(Color.orange);
else if (getValue() < 60) setForeground(Color.yellow);
else setForeground(Color.green);
}
颜色，一个颜色，这是一个基础。我不太确定当前是否需要颜色。我现在看到的问题是转换的步骤，因为每个转换都有不同数量的步骤
总结和问题
我不知道如何实现我正在尝试的目标，我只知道我需要一个to和basecolor
，我提供了一个链接，指向我看到的答案，但我无法真正理解它。根据给出的信息，我如何将其转到过渡色
？我花了很多时间试图找到/创建一个适合我的混合算法，这基本上就是我能够一瘸一拐地走到一起的
我已经使用这种方法来生成混合多种颜色的渐变过渡，如图所示
基本上，这种方法允许您设置一系列颜色和百分比标记，这样您就可以更好地控制颜色之间的转换点
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class ColorFading {
public static void main(String[] args) {
new ColorFading();
}
public ColorFading() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new FadePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class FadePane extends JPanel {
private final float[] fractions = new float[]{0f, 0.5f, 1f};
private final Color[] colors = new Color[]{Color.RED, Color.YELLOW, Color.GREEN};
private float progress = 1f;
private JSlider slider;
public FadePane() {
slider = new JSlider(0, 100);
setLayout(new BorderLayout());
add(slider, BorderLayout.SOUTH);
slider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
progress = ((float)slider.getValue() / 100f);
repaint();
}
});
slider.setValue(100);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
int width = getWidth();
int height = getHeight();
Color startColor = blendColors(fractions, colors, progress);
g2d.setColor(startColor);
g2d.fillRect(0, 0, width, height);
g2d.dispose();
}
}
public static Color blendColors(float[] fractions, Color[] colors, float progress) {
Color color = null;
if (fractions != null) {
if (colors != null) {
if (fractions.length == colors.length) {
int[] indicies = getFractionIndicies(fractions, progress);
float[] range = new float[]{fractions[indicies[0]], fractions[indicies[1]]};
Color[] colorRange = new Color[]{colors[indicies[0]], colors[indicies[1]]};
float max = range[1] - range[0];
float value = progress - range[0];
float weight = value / max;
color = blend(colorRange[0], colorRange[1], 1f - weight);
} else {
throw new IllegalArgumentException("Fractions and colours must have equal number of elements");
}
} else {
throw new IllegalArgumentException("Colours can't be null");
}
} else {
throw new IllegalArgumentException("Fractions can't be null");
}
return color;
}
public static int[] getFractionIndicies(float[] fractions, float progress) {
int[] range = new int[2];
int startPoint = 0;
while (startPoint < fractions.length && fractions[startPoint] <= progress) {
startPoint++;
}
if (startPoint >= fractions.length) {
startPoint = fractions.length - 1;
}
range[0] = startPoint - 1;
range[1] = startPoint;
return range;
}
public static Color blend(Color color1, Color color2, double ratio) {
float r = (float) ratio;
float ir = (float) 1.0 - r;
float rgb1[] = new float[3];
float rgb2[] = new float[3];
color1.getColorComponents(rgb1);
color2.getColorComponents(rgb2);
float red = rgb1[0] * r + rgb2[0] * ir;
float green = rgb1[1] * r + rgb2[1] * ir;
float blue = rgb1[2] * r + rgb2[2] * ir;
if (red < 0) {
red = 0;
} else if (red > 255) {
red = 255;
}
if (green < 0) {
green = 0;
} else if (green > 255) {
green = 255;
}
if (blue < 0) {
blue = 0;
} else if (blue > 255) {
blue = 255;
}
Color color = null;
try {
color = new Color(red, green, blue);
} catch (IllegalArgumentException exp) {
NumberFormat nf = NumberFormat.getNumberInstance();
System.out.println(nf.format(red) + "; " + nf.format(green) + "; " + nf.format(blue));
exp.printStackTrace();
}
return color;
}
}
导入java.awt.BorderLayout；
导入java.awt.Color；
导入java.awt.Dimension；
导入java.awt.EventQueue；
导入java.awt.Graphics；
导入java.awt.Graphics2D；
导入java.text.NumberFormat；
导入javax.swing.JFrame；
导入javax.swing.JPanel；
导入javax.swing.JSlider；
导入javax.swing.UIManager；
导入javax.swing.UnsupportedLookAndFeelException；
导入javax.swing.event.ChangeEvent；
导入javax.swing.event.ChangeListener；
公共级褪色{
公共静态void main（字符串[]args）{
新颜色褪色（）；
}
公共褪色（）{
invokeLater（新的Runnable（）{
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））；
}catch（ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex）{
}
JFrame=新JFrame（“测试”）；
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）；
frame.setLayout（新的BorderLayout（））；
frame.add（新的FadePane（））；
frame.pack（）；
frame.setLocationRelativeTo（空）；
frame.setVisible（true）；
}
});
}
公共类FadePane扩展了JPanel{
私有最终浮点数[]分数=新浮点数[]{0f，0.5f，1f}；
私有最终颜色[]颜色=新颜色[]{Color.RED，Color.YELLOW，Color.GREEN}；
私人浮动进度=1f；
专用滑动滑块；
公共法迪潘（）{
滑块=新的JSlider（0，100）；
setLayout（新的BorderLayout（））；
添加（滑块，BorderLayout.SOUTH）；
slider.addChangeListener（新的ChangeListener（）{
@凌驾
公共无效状态已更改（更改事件e）{
进度=（（float）slider.getValue（）/100f）；
重新油漆（）；
}
});
滑块设置值（100）；
}
@凌驾
公共维度getPreferredSize（）{
返回新维度（200200）；
}
@凌驾
受保护组件（图形g）{
超级组件（g）；
Graphics2D g2d=（Graphics2D）g.create（）；
int width=getWidth（）；
int height=getHeight（）；
颜色开始颜色=混合颜色（分数、颜色、进度）；
g2d.setColor（startColor）；
g2d.fillRect（0，0，宽度，高度）；
g2d.dispose（）；
}
}
公共静态混合颜色（浮动[]分数，颜色[]颜色，浮动进度）{
颜色=空；
if（分数！=null）{
如果（颜色！=null）{
if（分数.length==colors.length）{
int[]指标=获取细分指标（分数、进度）；
浮动[]范围=新浮动[]{分数[标记[0]]，分数[标记[1]}；
颜色[]颜色范围=新颜色[]{颜色[标记[0]]，颜色[标记[1]}；
浮动最大值=范围[1]-范围[0]；
浮动值=进度-范围[0]；
浮动重量=值/最大值；
颜色=混合（颜色范围[0]，颜色范围[1]，1f-重量）；
}否则{
抛出新的IllegalArgumentException（“分数和颜色必须具有相同数量的元素”）；
}
}否则{
抛出新的IllegalArgumentException（“颜色不能为空”）；
}
}否则{
抛出新的IllegalArgumentException（“分数不能为null”）；
}
返回颜色；
}
公共静态int[]getFractionIndications（浮点[]分数，浮点进度）{
int[]范围=新的int[2]；
int起始点=0；
while（起始点<分数.length&&分数[起始点]=分数.length）{
起始点=分数。长度-1；
}
范围[0]=起始点-1；
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class ColorFading {
public static void main(String[] args) {
new ColorFading();
}
public ColorFading() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new FadePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class FadePane extends JPanel {
private final float[] fractions = new float[]{0f, 0.5f, 1f};
private final Color[] colors = new Color[]{Color.RED, Color.YELLOW, Color.GREEN};
private float progress = 1f;
private JSlider slider;
public FadePane() {
slider = new JSlider(0, 100);
setLayout(new BorderLayout());
add(slider, BorderLayout.SOUTH);
slider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
progress = ((float)slider.getValue() / 100f);
repaint();
}
});
slider.setValue(100);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
int width = getWidth();
int height = getHeight();
Color startColor = blendColors(fractions, colors, progress);
g2d.setColor(startColor);
g2d.fillRect(0, 0, width, height);
g2d.dispose();
}
}
public static Color blendColors(float[] fractions, Color[] colors, float progress) {
Color color = null;
if (fractions != null) {
if (colors != null) {
if (fractions.length == colors.length) {
int[] indicies = getFractionIndicies(fractions, progress);
float[] range = new float[]{fractions[indicies[0]], fractions[indicies[1]]};
Color[] colorRange = new Color[]{colors[indicies[0]], colors[indicies[1]]};
float max = range[1] - range[0];
float value = progress - range[0];
float weight = value / max;
color = blend(colorRange[0], colorRange[1], 1f - weight);
} else {
throw new IllegalArgumentException("Fractions and colours must have equal number of elements");
}
} else {
throw new IllegalArgumentException("Colours can't be null");
}
} else {
throw new IllegalArgumentException("Fractions can't be null");
}
return color;
}
public static int[] getFractionIndicies(float[] fractions, float progress) {
int[] range = new int[2];
int startPoint = 0;
while (startPoint < fractions.length && fractions[startPoint] <= progress) {
startPoint++;
}
if (startPoint >= fractions.length) {
startPoint = fractions.length - 1;
}
range[0] = startPoint - 1;
range[1] = startPoint;
return range;
}
public static Color blend(Color color1, Color color2, double ratio) {
float r = (float) ratio;
float ir = (float) 1.0 - r;
float rgb1[] = new float[3];
float rgb2[] = new float[3];
color1.getColorComponents(rgb1);
color2.getColorComponents(rgb2);
float red = rgb1[0] * r + rgb2[0] * ir;
float green = rgb1[1] * r + rgb2[1] * ir;
float blue = rgb1[2] * r + rgb2[2] * ir;
if (red < 0) {
red = 0;
} else if (red > 255) {
red = 255;
}
if (green < 0) {
green = 0;
} else if (green > 255) {
green = 255;
}
if (blue < 0) {
blue = 0;
} else if (blue > 255) {
blue = 255;
}
Color color = null;
try {
color = new Color(red, green, blue);
} catch (IllegalArgumentException exp) {
NumberFormat nf = NumberFormat.getNumberInstance();
System.out.println(nf.format(red) + "; " + nf.format(green) + "; " + nf.format(blue));
exp.printStackTrace();
}
return color;
}
}
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.EnumMap;
import java.util.Map;
import javax.swing.*;
import javax.swing.event.*;
@SuppressWarnings("serial")
public class ColorTransition extends JPanel {
private static final int TRANSITION_DELAY = 30;
private static final int PREF_W = 800;
private static final int PREF_H = 600;
private RgbSliderPanel rgbSliderPanel1 = new RgbSliderPanel("Color 1");
private RgbSliderPanel rgbSliderPanel2 = new RgbSliderPanel("Color 2");
private Color background1;
private Color background2;
private JButton button = new JButton(new ButtonAction("Push Me"));
public ColorTransition() {
setBackground(Color.black);
add(rgbSliderPanel1.getMainPanel());
add(rgbSliderPanel2.getMainPanel());
add(button);
rgbSliderPanel1.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (RgbSliderPanel.COLOR.equals(evt.getPropertyName())) {
setBackground(rgbSliderPanel1.calculateColor());
}
}
});
}
@Override
public Dimension getPreferredSize() {
return new Dimension(PREF_W, PREF_H);
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
button.setEnabled(enabled);
rgbSliderPanel1.setEnabled(enabled);
rgbSliderPanel2.setEnabled(enabled);
}
private class ButtonAction extends AbstractAction {
public ButtonAction(String name) {
super(name);
}
@Override
public void actionPerformed(ActionEvent e) {
ColorTransition.this.setEnabled(false);
background1 = rgbSliderPanel1.calculateColor();
background2 = rgbSliderPanel2.calculateColor();
setBackground(background1);
Timer timer = new Timer(TRANSITION_DELAY, new TransitionListener());
timer.start();
}
private class TransitionListener implements ActionListener {
private int index = 0;
@Override
public void actionPerformed(ActionEvent e) {
if (index > 100) {
((Timer) e.getSource()).stop();
ColorTransition.this.setEnabled(true);
} else {
int r = (int) (background2.getRed() * index / 100.0 + background1
.getRed() * (100 - index) / 100.0);
int g = (int) (background2.getGreen() * index / 100.0 + background1
.getGreen() * (100 - index) / 100.0);
int b = (int) (background2.getBlue() * index / 100.0 + background1
.getBlue() * (100 - index) / 100.0);
setBackground(new Color(r, g, b));
}
index++;
}
}
}
private static void createAndShowGui() {
JFrame frame = new JFrame("ColorTransition");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new ColorTransition());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
enum Rgb {
RED("Red"), GREEN("Green"), BLUE("Blue");
private String name;
private Rgb(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
class RgbSliderPanel {
public static final String COLOR = "color";
private JPanel mainPanel = new JPanel();
private SwingPropertyChangeSupport propertyChangeSupport = new SwingPropertyChangeSupport(
this);
private Map<Rgb, JSlider> colorSliderMap = new EnumMap<>(Rgb.class);
private String name;
protected Color color;
public RgbSliderPanel(String name) {
this.name = name;
mainPanel.setBorder(BorderFactory.createTitledBorder(name));
//mainPanel.setOpaque(false);
mainPanel.setLayout(new GridLayout(0, 1));
for (Rgb rgb : Rgb.values()) {
JSlider colorSlider = new JSlider(0, 255, 0);
colorSliderMap.put(rgb, colorSlider);
mainPanel.add(colorSlider);
colorSlider.setBorder(BorderFactory.createTitledBorder(rgb.getName()));
colorSlider.setPaintTicks(true);
colorSlider.setPaintTrack(true);
colorSlider.setMajorTickSpacing(50);
colorSlider.setMinorTickSpacing(10);
colorSlider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
Color oldValue = color;
Color newValue = calculateColor();
color = newValue;
propertyChangeSupport.firePropertyChange(COLOR, oldValue,
newValue);
}
});
}
}
public JComponent getMainPanel() {
return mainPanel;
}
public void setEnabled(boolean enabled) {
for (JSlider slider : colorSliderMap.values()) {
slider.setEnabled(enabled);
}
}
public Color calculateColor() {
int r = colorSliderMap.get(Rgb.RED).getValue();
int g = colorSliderMap.get(Rgb.GREEN).getValue();
int b = colorSliderMap.get(Rgb.BLUE).getValue();
return new Color(r, g, b);
}
public String getName() {
return name;
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.removePropertyChangeListener(listener);
}
}