移除JTable內的JCombobox邊框

Question

我已將JComoboBox中的箭頭按鈕移除，使其看起來像JTextField並將其添加爲celleditor。其目的是創建一個AutoSuggest（而不是AutoComplete）JTable單元。

在做這樣做的邊界有點看起來irking.How更改邊框，使其看起來像右邊的文本框邊框。我曾嘗試刪除邊框創建的線條邊框。但它並沒有消除藍色的邊界。

使用Nimbus UI。

MCVE的問題

import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.BorderFactory; 
import javax.swing.DefaultCellEditor; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JFrame; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.SwingUtilities; 
import javax.swing.UIManager; 

public class Sample extends JFrame { 

    public Sample() { 
     init(); 
    } 

    private void init() { 
     JTable table = new JTable(5, 5); 
     DefaultCellEditor cellEditor = new DefaultCellEditor(new EditorCombo()); 
     cellEditor.setClickCountToStart(2); 
     table.getColumnModel().getColumn(0) 
       .setCellEditor(cellEditor); 
     table.setRowHeight(30); 
     table.setCellSelectionEnabled(true); 
     add(new JScrollPane(table)); 
    } 

    public static void main(String[] args) { 
     setUpUI("Nimbus"); 
     SwingUtilities.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       Sample samp = new Sample(); 
       samp.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       samp.setTitle("Table Test"); 
       samp.pack(); 
       samp.setLocationRelativeTo(null); 
       samp.setVisible(true); 
      } 
     }); 
    } 

    private static void setUpUI(String ui) { 
     try { 
      for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) { 
       if (ui.equals(info.getName())) { 
        UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) { 
      Logger.getLogger(Sample.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    class EditorCombo extends JComboBox { 

     public EditorCombo() { 
      setEditable(true); 
      for (int i = 0; i < 10; i++) { 
       addItem("Sample" + i); 
      } 
      setUI(new javax.swing.plaf.synth.SynthComboBoxUI() { 
       @Override 
       protected JButton createArrowButton() { 
        JButton button = new JButton() { 
         @Override 
         public int getWidth() { 
          return 0; 
         } 
        }; 
        button.setBorder(BorderFactory.createEmptyBorder()); 
        button.setVisible(false); 
        return button; 
       } 

       @Override 
       public void configureArrowButton() { 
       } 
      }); 
     } 

    } 
} 

Answer 1

使用雨雲UI

也許這將幫助你：Nimbus Defaults (The Java™ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)

• TextField[Focused].borderPainter
• TextField[Enabled].borderPainter
• ComboBox:\"ComboBox.textField\"[Enabled].backgroundPainter
• ComboBox:\"ComboBox.textField\"[Selected].backgroundPainter

import java.awt.*; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.*; 

public class Sample2 extends JFrame { 
    public Sample2() { 
    init(); 
    } 

    private void init() { 
    JTable table = new JTable(5, 5); 
    DefaultCellEditor cellEditor = new DefaultCellEditor(new EditorCombo()); 
    cellEditor.setClickCountToStart(2); 
    table.getColumnModel().getColumn(0).setCellEditor(cellEditor); 
    table.setRowHeight(30); 
    table.setCellSelectionEnabled(true); 
    add(new JScrollPane(table)); 
    } 

    public static void main(String[] args) { 
    setUpUI("Nimbus"); 
    SwingUtilities.invokeLater(new Runnable() { 

     @Override 
     public void run() { 
     Sample2 samp = new Sample2(); 
     samp.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     samp.setTitle("Table Test"); 
     samp.pack(); 
     samp.setLocationRelativeTo(null); 
     samp.setVisible(true); 
     } 
    }); 
    } 

    private static void setUpUI(String ui) { 
    try { 
     for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) { 
     if (ui.equals(info.getName())) { 
      UIManager.setLookAndFeel(info.getClassName()); 
      break; 
     } 
     } 
    } catch (ClassNotFoundException | InstantiationException 
      | IllegalAccessException | UnsupportedLookAndFeelException ex) { 
     Logger.getLogger(Sample2.class.getName()).log(Level.SEVERE, null, ex); 
    } 
    } 
} 

class EditorCombo extends JComboBox<String> { 
    public EditorCombo() { 
    super(); 
    setEditable(true); 
    for (int i = 0; i < 10; i++) { 
     addItem("Sample" + i); 
    } 
    } 
    @Override public void updateUI() { 
    //super.updateUI(); 
    setUI(new javax.swing.plaf.synth.SynthComboBoxUI() { 
     @Override 
     protected JButton createArrowButton() { 
     JButton button = new JButton() { 
      @Override 
      public int getWidth() { 
      return 0; 
      } 
     }; 
     button.setBorder(BorderFactory.createEmptyBorder()); 
     button.setVisible(false); 
     return button; 
     } 
     @Override 
     public void configureArrowButton() { 
     } 
    }); 
    UIDefaults d = new UIDefaults(); 
//  putClientProperty("Nimbus.Overrides", d); 
//  putClientProperty("Nimbus.Overrides.InheritDefaults", false); 
//  JComponent c = (JComponent) getEditor().getEditorComponent(); 
//  c.putClientProperty("Nimbus.Overrides", d); 
//  c.putClientProperty("Nimbus.Overrides.InheritDefaults", false); 
//  c.setBorder(BorderFactory.createLineBorder(Color.BLACK)); 

    Painter<JComponent> emptyPainter = new Painter<JComponent>() { 
     @Override public void paint(Graphics2D g, JComponent c, int w, int h) { 
     /* Empty painter */ 
     } 
    }; 
    d.put("TextField.borderPainter", emptyPainter); 
    d.put("TextField[Enabled].borderPainter", emptyPainter); 
    d.put("TextField[Focused].borderPainter", emptyPainter); 
    d.put("ComboBox:\"ComboBox.textField\"[Enabled].backgroundPainter", emptyPainter); 
    d.put("ComboBox:\"ComboBox.textField\"[Selected].backgroundPainter", emptyPainter); 
    d.put("ComboBox[Editable+Focused].backgroundPainter", emptyPainter); 
    putClientProperty("Nimbus.Overrides", d); 
    JComponent c = (JComponent) getEditor().getEditorComponent(); 
    c.putClientProperty("Nimbus.Overrides", d); 
    c.setBorder(BorderFactory.createLineBorder(Color.BLACK)); 
    } 
}