RGB-only JColorChooser（Java 7）

Question

我正在嘗試創建一個JFrame，其中包含僅包含選擇RGB顏色所必需的內容的JPanel。我一直在使用JColorChooser,AbstractColorChooserPanel和ColorModel，閱讀Oracle教程，但我沒有理解如何開發出我想要的東西。我甚至還下載了OpenJDK源代碼來獲取這些類的源代碼，但仍然沒有。我想是這樣的：

阿爾法東西應該消失，顏色代碼字段應設置爲不可見，但在單擊「是」按鈕時繼續工作，所以我可以檢索代碼（在一個actionPerformed方法中，我猜）。這也是重寫paintComponent方法的一個很好的補充。

在此先感謝。

編輯：這是我得到了什麼我現在有（上面的照片，沒有「Paint'-編輯）：

for (final AbstractColorChooserPanel accp : panels) { 
    if (accp.getDisplayName().equals("RGB")) { 
    JOptionPane.showOptionDialog(Main.frame, accp, 
    "Color selection tool", JOptionPane.OK_OPTION, 
    JOptionPane.QUESTION_MESSAGE, null, null, 0); 
    } 
} 

EDIT2：到目前爲止，我現在已經能夠刪除阿爾法的東西，但我還不能'找到'顯示顏色代碼的標籤和字段，所以他們不斷顯示，另外，由於我無法訪問字段，我不能訪問顏色代碼：

這是此代碼：

package edu.utils; 

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.GradientPaint; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.RenderingHints; 
import java.awt.Toolkit; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.lang.reflect.Array; 
import java.lang.reflect.Field; 

import javax.swing.JColorChooser; 
import javax.swing.JDialog; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JSlider; 
import javax.swing.JSpinner; 
import javax.swing.WindowConstants; 
import javax.swing.colorchooser.AbstractColorChooserPanel; 

import edu.io.local.Log; 

public final class RGBColorChooserPanel extends JDialog implements ActionListener { 

private final JColorChooser jCC; 
private final JPanel  panel; 
private String    colorCode; 

public RGBColorChooserPanel(final String title) { 
super(edu.Main.frame); 
this.setTitle(title); 
this.jCC = new JColorChooser(); 
this.modifyJColorChooser(); 
this.panel = new JPanel() { 
    @Override 
    protected void paintComponent(final Graphics g) { 
    final Graphics2D g2d = (Graphics2D) g; 
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
      RenderingHints.VALUE_ANTIALIAS_ON); 

    final GradientPaint gp = new GradientPaint(0, 0, Color.BLUE, 0, this.getHeight(), 
      Color.BLACK); 

    g2d.setPaint(gp); 
    g2d.fillRect(0, 0, this.getWidth(), this.getHeight()); 

    super.paintComponent(g); 
    } 
}; 
this.panel.add(this.jCC); 
this.panel.setOpaque(false); 
this.jCC.setOpaque(false); 
this.jCC.setPreviewPanel(new JPanel()); 
this.jCC.setColor(120, 20, 57); 
this.add(this.panel, BorderLayout.CENTER); 
this.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE); 
this.pack(); 

final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 
this.setLocation((screenSize.width - this.getWidth())/2, 
     (screenSize.height - this.getHeight())/2); 
this.setResizable(false); 
this.setVisible(true); 
} 

@Override 
public void actionPerformed(final ActionEvent e) { 
// TODO Auto-generated method stub 

} 

private void modifyJColorChooser() { 
final AbstractColorChooserPanel[] panels = this.jCC.getChooserPanels(); 
for (final AbstractColorChooserPanel accp : panels) { 
    if (!accp.getDisplayName().equals("RGB")) { 
    this.jCC.removeChooserPanel(accp); 
    } 
} 

final AbstractColorChooserPanel[] colorPanels = this.jCC.getChooserPanels(); 
final AbstractColorChooserPanel cp = colorPanels[0]; 

Field f = null; 
try { 
    f = cp.getClass().getDeclaredField("panel"); 
} catch (NoSuchFieldException | SecurityException e) { 
    Log.log(e); 
} 
f.setAccessible(true); 

Object colorPanel = null; 
try { 
    colorPanel = f.get(cp); 
} catch (IllegalArgumentException | IllegalAccessException e) { 
    Log.log(e); 
} 

Field f2 = null; 
try { 
    f2 = colorPanel.getClass().getDeclaredField("spinners"); 
} catch (NoSuchFieldException | SecurityException e4) { 
    Log.log(e4); 
} 
f2.setAccessible(true); 
Object rows = null; 
try { 
    rows = f2.get(colorPanel); 
} catch (IllegalArgumentException | IllegalAccessException e3) { 
    Log.log(e3); 
} 

final Object transpSlispinner = Array.get(rows, 3); 
Field f3 = null; 
try { 
    f3 = transpSlispinner.getClass().getDeclaredField("slider"); 
} catch (NoSuchFieldException | SecurityException e) { 
    Log.log(e); 
} 
f3.setAccessible(true); 
JSlider slider = null; 
try { 
    slider = (JSlider) f3.get(transpSlispinner); 
} catch (IllegalArgumentException | IllegalAccessException e2) { 
    Log.log(e2); 
} 
slider.setVisible(false); 
Field f4 = null; 
try { 
    f4 = transpSlispinner.getClass().getDeclaredField("spinner"); 
} catch (NoSuchFieldException | SecurityException e1) { 
    Log.log(e1); 
} 
f4.setAccessible(true); 
JSpinner spinner = null; 
try { 
    spinner = (JSpinner) f4.get(transpSlispinner); 
} catch (IllegalArgumentException | IllegalAccessException e) { 
    Log.log(e); 
} 
spinner.setVisible(false); 
Field f5 = null; 
try { 
    f5 = transpSlispinner.getClass().getDeclaredField("label"); 
} catch (NoSuchFieldException | SecurityException e1) { 
    Log.log(e1); 
} 
f5.setAccessible(true); 
JLabel label = null; 
try { 
    label = (JLabel) f5.get(transpSlispinner); 
} catch (IllegalArgumentException | IllegalAccessException e) { 
    Log.log(e); 
} 
label.setVisible(false); 

Field f6 = null; 
try { 
    f6 = transpSlispinner.getClass().getDeclaredField("value"); 
} catch (NoSuchFieldException | SecurityException e1) { 
    Log.log(e1); 
} 
f6.setAccessible(true); 
float value = 0; 
try { 
    value = (float) f6.get(transpSlispinner); 
} catch (IllegalArgumentException | IllegalAccessException e) { 
    Log.log(e); 
} 
} 
} 

PS：我知道的異常處理的古怪，但我需要管理每個語句例外，所以請上沒有怨言。

Answer 1

您最好的選擇是Creating a Custom Chooser Panel擴展AbstractColorChooserPanel。教程example雖然是基本的，但是對安裝和使用很有用。您草圖的完整實現超出了SO的範圍;但在許多現存的examples，this one和this one似乎值得仔細檢查。這個相關Q&A也可能提供一些見解。