我正在尝试制作一个用滑块将RGB更改为CMYK的程序，但我遇到了一个问题：当更改RGB时，CMYK滑块必须相应地更改，但随后会检测到CMYK的变化，所以我来回走动行动。我该如何解决这个问题？
完整代码：
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import javax.swing.JLabel;
import javax.swing.JPanel;
import java.awt.Color;
public class MainWND {
int i_R, i_G, i_B;
float i_C, i_M, i_Y, i_K;
boolean changedRGB, changedCMYK = false;
private JFrame frame;
private JSlider sliderR;
private JSlider sliderG;
private JSlider sliderB;
private JSlider sliderC;
private JSlider sliderM;
private JSlider sliderY;
private JSlider sliderK;
private JLabel lblNewLabel;
private JLabel lblNewLabel_1;
private JLabel lbR;
private JLabel lbG;
private JLabel lbB;
private JLabel lbC;
private JLabel lbM;
private JLabel lbY;
private JLabel lbK;
private JLabel lblNewLabel_9;
private JLabel lblNewLabel_10;
private JLabel lblNewLabel_11;
private JLabel lblNewLabel_12;
private JLabel lblNewLabel_13;
private JLabel lblNewLabel_14;
private JLabel lblNewLabel_15;
private JPanel panel;
public void rgb_to_cmyk() {
i_K = Math.min(Math.min(255 - i_R, 255 - i_G), 255 - i_B);
// System.out.println("! " + i_K + " !");
// System.out.println("! " + (int)i_K + " !");
if (i_K != 255) {
i_C = (255 - i_R - i_K) / (255 - i_K) * 255;
i_M = (255 - i_G - i_K) / (255 - i_K) * 255;
i_Y = (255 - i_B - i_K) / (255 - i_K) * 255;
} else {
i_C = 255 - i_R;
i_M = 255 - i_G;
i_Y = 255 - i_B;
}
// System.out.println(i_C+" "+i_M+" "+i_Y+" "+i_K);
}
public void cmyk_to_rgb() {
if (i_K != 255) {
i_R = (int) ((255 - i_C) * (255 - i_K)) / 255;
i_G = (int) ((255 - i_M) * (255 - i_K)) / 255;
i_B = (int) ((255 - i_Y) * (255 - i_K)) / 255;
} else {
i_R = (int) (255 - i_C);
i_G = (int) (255 - i_M);
i_B = (int) (255 - i_Y);
}
}
public void update() {
sliderR.setValue(i_R);
sliderG.setValue(i_G);
sliderB.setValue(i_B);
sliderC.setValue((int) i_C);
sliderM.setValue((int) (i_M));
sliderY.setValue((int) (i_Y));
sliderK.setValue((int) (i_K));
lbR.setText(Integer.toString(i_R));
panel.setBackground(new Color(i_R, i_G, i_B));
System.out.println("RGB " + changedRGB + " CMYK " + changedCMYK);
}
public class rgbListener implements ChangeListener {
@Override
public void stateChanged(ChangeEvent arg0) {
i_R = sliderR.getValue();
i_G = sliderG.getValue();
i_B = sliderB.getValue();
rgb_to_cmyk();
update();
}
}
public class cmykListener implements ChangeListener {
@Override
public void stateChanged(ChangeEvent arg0) {
i_C = sliderC.getValue();
i_M = sliderM.getValue();
i_Y = sliderY.getValue();
i_K = sliderK.getValue();
cmyk_to_rgb();
update();
}
}
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MainWND window = new MainWND();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public MainWND() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 620, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
GridBagLayout gridBagLayout = new GridBagLayout();
gridBagLayout.columnWidths = new int[] { 0, 150, 0, -48, 197, 33, 0 };
gridBagLayout.rowHeights = new int[] { 0, 0, 0, 0, 0, 83, 0, 0 };
gridBagLayout.columnWeights = new double[] { 0.0, 1.0, 0.0, 0.0, 0.0,
0.0, Double.MIN_VALUE };
gridBagLayout.rowWeights = new double[] { 0.0, 0.0, 0.0, 0.0, 0.0, 1.0,
0.0, Double.MIN_VALUE };
frame.getContentPane().setLayout(gridBagLayout);
lblNewLabel = new JLabel("RGB");
GridBagConstraints gbc_lblNewLabel = new GridBagConstraints();
gbc_lblNewLabel.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel.gridx = 1;
gbc_lblNewLabel.gridy = 0;
frame.getContentPane().add(lblNewLabel, gbc_lblNewLabel);
lblNewLabel_1 = new JLabel("CMYK");
GridBagConstraints gbc_lblNewLabel_1 = new GridBagConstraints();
gbc_lblNewLabel_1.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_1.gridx = 4;
gbc_lblNewLabel_1.gridy = 0;
frame.getContentPane().add(lblNewLabel_1, gbc_lblNewLabel_1);
lblNewLabel_9 = new JLabel("R");
GridBagConstraints gbc_lblNewLabel_9 = new GridBagConstraints();
gbc_lblNewLabel_9.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_9.gridx = 0;
gbc_lblNewLabel_9.gridy = 1;
frame.getContentPane().add(lblNewLabel_9, gbc_lblNewLabel_9);
sliderR = new JSlider();
sliderR.setValue(0);
sliderR.setMaximum(255);
GridBagConstraints gbc_sliderR = new GridBagConstraints();
gbc_sliderR.insets = new Insets(0, 0, 5, 5);
gbc_sliderR.gridx = 1;
gbc_sliderR.gridy = 1;
sliderR.addChangeListener(new rgbListener());
frame.getContentPane().add(sliderR, gbc_sliderR);
lbR = new JLabel("New label");
GridBagConstraints gbc_lbR = new GridBagConstraints();
gbc_lbR.insets = new Insets(0, 0, 5, 5);
gbc_lbR.gridx = 2;
gbc_lbR.gridy = 1;
frame.getContentPane().add(lbR, gbc_lbR);
lblNewLabel_12 = new JLabel("C");
GridBagConstraints gbc_lblNewLabel_12 = new GridBagConstraints();
gbc_lblNewLabel_12.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_12.gridx = 3;
gbc_lblNewLabel_12.gridy = 1;
frame.getContentPane().add(lblNewLabel_12, gbc_lblNewLabel_12);
sliderC = new JSlider();
sliderC.setValue(0);
sliderC.setMaximum(255);
GridBagConstraints gbc_sliderC = new GridBagConstraints();
gbc_sliderC.insets = new Insets(0, 0, 5, 5);
gbc_sliderC.gridx = 4;
gbc_sliderC.gridy = 1;
sliderC.addChangeListener(new cmykListener());
frame.getContentPane().add(sliderC, gbc_sliderC);
lbC = new JLabel("New label");
GridBagConstraints gbc_lbC = new GridBagConstraints();
gbc_lbC.insets = new Insets(0, 0, 5, 0);
gbc_lbC.gridx = 5;
gbc_lbC.gridy = 1;
frame.getContentPane().add(lbC, gbc_lbC);
lblNewLabel_10 = new JLabel("G");
GridBagConstraints gbc_lblNewLabel_10 = new GridBagConstraints();
gbc_lblNewLabel_10.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_10.gridx = 0;
gbc_lblNewLabel_10.gridy = 2;
frame.getContentPane().add(lblNewLabel_10, gbc_lblNewLabel_10);
sliderG = new JSlider();
sliderG.setValue(0);
sliderG.setMaximum(255);
GridBagConstraints gbc_sliderG = new GridBagConstraints();
gbc_sliderG.insets = new Insets(0, 0, 5, 5);
gbc_sliderG.gridx = 1;
gbc_sliderG.gridy = 2;
sliderG.addChangeListener(new rgbListener());
frame.getContentPane().add(sliderG, gbc_sliderG);
lbG = new JLabel("New label");
GridBagConstraints gbc_lbG = new GridBagConstraints();
gbc_lbG.insets = new Insets(0, 0, 5, 5);
gbc_lbG.gridx = 2;
gbc_lbG.gridy = 2;
frame.getContentPane().add(lbG, gbc_lbG);
lblNewLabel_13 = new JLabel("M");
GridBagConstraints gbc_lblNewLabel_13 = new GridBagConstraints();
gbc_lblNewLabel_13.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_13.gridx = 3;
gbc_lblNewLabel_13.gridy = 2;
frame.getContentPane().add(lblNewLabel_13, gbc_lblNewLabel_13);
sliderM = new JSlider();
sliderM.setValue(0);
sliderM.setMaximum(255);
GridBagConstraints gbc_sliderM = new GridBagConstraints();
gbc_sliderM.insets = new Insets(0, 0, 5, 5);
gbc_sliderM.gridx = 4;
gbc_sliderM.gridy = 2;
sliderM.addChangeListener(new cmykListener());
frame.getContentPane().add(sliderM, gbc_sliderM);
lbM = new JLabel("New label");
GridBagConstraints gbc_lbM = new GridBagConstraints();
gbc_lbM.insets = new Insets(0, 0, 5, 0);
gbc_lbM.gridx = 5;
gbc_lbM.gridy = 2;
frame.getContentPane().add(lbM, gbc_lbM);
lblNewLabel_11 = new JLabel("B");
GridBagConstraints gbc_lblNewLabel_11 = new GridBagConstraints();
gbc_lblNewLabel_11.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_11.gridx = 0;
gbc_lblNewLabel_11.gridy = 3;
frame.getContentPane().add(lblNewLabel_11, gbc_lblNewLabel_11);
sliderB = new JSlider();
sliderB.setValue(0);
sliderB.setMaximum(255);
GridBagConstraints gbc_sliderB = new GridBagConstraints();
gbc_sliderB.insets = new Insets(0, 0, 5, 5);
gbc_sliderB.gridx = 1;
gbc_sliderB.gridy = 3;
sliderB.addChangeListener(new rgbListener());
frame.getContentPane().add(sliderB, gbc_sliderB);
lbB = new JLabel("New label");
GridBagConstraints gbc_lbB = new GridBagConstraints();
gbc_lbB.insets = new Insets(0, 0, 5, 5);
gbc_lbB.gridx = 2;
gbc_lbB.gridy = 3;
frame.getContentPane().add(lbB, gbc_lbB);
lblNewLabel_14 = new JLabel("Y");
GridBagConstraints gbc_lblNewLabel_14 = new GridBagConstraints();
gbc_lblNewLabel_14.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_14.gridx = 3;
gbc_lblNewLabel_14.gridy = 3;
frame.getContentPane().add(lblNewLabel_14, gbc_lblNewLabel_14);
sliderY = new JSlider();
sliderY.setValue(0);
sliderY.setMaximum(255);
GridBagConstraints gbc_sliderY = new GridBagConstraints();
gbc_sliderY.insets = new Insets(0, 0, 5, 5);
gbc_sliderY.gridx = 4;
gbc_sliderY.gridy = 3;
sliderY.addChangeListener(new cmykListener());
frame.getContentPane().add(sliderY, gbc_sliderY);
lbY = new JLabel("New label");
GridBagConstraints gbc_lbY = new GridBagConstraints();
gbc_lbY.insets = new Insets(0, 0, 5, 0);
gbc_lbY.gridx = 5;
gbc_lbY.gridy = 3;
frame.getContentPane().add(lbY, gbc_lbY);
lblNewLabel_15 = new JLabel("K");
GridBagConstraints gbc_lblNewLabel_15 = new GridBagConstraints();
gbc_lblNewLabel_15.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel_15.gridx = 3;
gbc_lblNewLabel_15.gridy = 4;
frame.getContentPane().add(lblNewLabel_15, gbc_lblNewLabel_15);
sliderK = new JSlider();
sliderK.setValue(255);
sliderK.setMaximum(255);
GridBagConstraints gbc_sliderK = new GridBagConstraints();
gbc_sliderK.insets = new Insets(0, 0, 5, 5);
gbc_sliderK.gridx = 4;
gbc_sliderK.gridy = 4;
sliderK.addChangeListener(new cmykListener());
frame.getContentPane().add(sliderK, gbc_sliderK);
lbK = new JLabel("New label");
GridBagConstraints gbc_lbK = new GridBagConstraints();
gbc_lbK.insets = new Insets(0, 0, 5, 0);
gbc_lbK.gridx = 5;
gbc_lbK.gridy = 4;
frame.getContentPane().add(lbK, gbc_lbK);
panel = new JPanel();
GridBagConstraints gbc_panel = new GridBagConstraints();
gbc_panel.gridheight = 2;
gbc_panel.gridwidth = 6;
gbc_panel.insets = new Insets(0, 0, 0, 5);
gbc_panel.fill = GridBagConstraints.BOTH;
gbc_panel.gridx = 0;
gbc_panel.gridy = 5;
frame.getContentPane().add(panel, gbc_panel);
}
}
答案 0 :(得分：2)
在设置模型的值之前，在另一个ChangeListener中取消激活每个倒数ChangeListener，然后重新激活另一个侦听器。