無狀態JButton

Question

我試圖改變我的JButton的外觀，以便按鈕沒有達到狀態。

目前，我有這樣的事情：

，我想是這樣的：（從NetBeans中正在添加）

換句話說，我只想按鈕的圖像可見當按鈕沒有任何焦點時。但是，當用戶點擊或翻轉它時，它應該與常規按鈕完全相同。

多個例子：

沒有焦點

翻轉

點擊

我使用了一個內部類爲我的按鈕。它看起來像這樣：

private class CustumJButton extends JButton 
{ 

    public CustumJButton(Icon icon) 
    { 
     super(icon); 
     int size = 30; 
     setPreferredSize(new Dimension(size, size)); 
     setFocusable(false); 
    } 
} 

謝謝ayoye。

Answer 1

你可以做到這一點使用setBorderPainted()和setContentAreaFilled()方法。這裏是你正在尋找的簡短演示。我希望它會給你粗略的數字來說明如何實現你的任務。：

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 

class CustomJButton extends JButton 
{ 

    public CustomJButton(String icon) 
    { 
     super(icon); 
     /*int size = 30; 
     setPreferredSize(new Dimension(size, size));*/ 
     addFocusListener(new ButtonFocusAdapter()); 
     addMouseListener(new ButtonMouseAdapter()); 
     setContentAreaFilled(false); 
     setBorderPainted(false); 
     //setFocusable(false);//Don't use this method. This would avoid the focus event on JButton 
    } 
    private void decorateButton() 
    { 
     setContentAreaFilled(true); 
     setBorderPainted(true); 
    } 
    private void unDecorateButton() 
    { 
     setContentAreaFilled(false); 
     setBorderPainted(false); 
    } 
    private class ButtonFocusAdapter extends FocusAdapter 
    { 
     @Override 
     public void focusGained(FocusEvent evt) 
     { 
      decorateButton(); 
     } 
     @Override 
     public void focusLost(FocusEvent evt) 
     { 
      unDecorateButton(); 
     } 
    } 
    private class ButtonMouseAdapter extends MouseAdapter 
    { 
     @Override 
     public void mouseEntered(MouseEvent evt) 
     { 
      decorateButton(); 
     } 
     @Override 
     public void mouseExited(MouseEvent evt) 
     { 
      unDecorateButton(); 
     } 
    } 
} 
public class ButtonFrame extends JFrame 
{ 
    public void createAndShowGUI() 
    { 
     Container c = getContentPane(); 
     c.setLayout(new FlowLayout()); 
     for (int i = 0; i < 4 ; i++) 
     { 
      CustomJButton cb = new CustomJButton("Button "+i); 
      c.add(cb); 
     } 
     pack(); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setVisible(true); 
    } 
    public static void main(String st[]) 
    { 
     SwingUtilities.invokeLater(new Runnable() 
     { 
      @Override 
      public void run() 
      { 
       ButtonFrame bf = new ButtonFrame(); 
       bf.createAndShowGUI(); 
       bf.setLocationRelativeTo(null); 
      } 
     }); 
    } 
} 

Answer 2

您應該查看可換膚的「Synth Look and Feel」，但也要注意Swing將會被棄用，並且從長遠來看replaced by JavaFX。如果您正在構建新應用程序，則可能需要考慮使用可能爲skinned with CSS的JavaFX來實現您正在尋找的效果。

Answer 3

我猜你需要使用這兩個東西，使其工作，setBorderPainted(boolean)和setContentAreaFilled(boolean)

buttonObject.setBorderPainted(false); 
buttonObject.setContentAreaFilled(false); 

在這個例子中列舉了changing appearance of JButton通過@mKorbel

import java.awt.*; 
import java.awt.event.*; 
import java.net.URL; 
import javax.imageio.ImageIO; 
import javax.swing.*; 

public class ButtonDemo 
{ 
    private JButton demoButton; 
    private ImageIcon buttonImage; 

    private void displayGUI() 
    { 
     JFrame frame = new JFrame("Button Demo Example"); 
     frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 

     JPanel contentPane = new JPanel(); 
     try 
     { 
      //buttonImage = new ImageIcon(ImageIO.read(
      // getClass().getResource("/image/bulb.gif"))); 
      buttonImage = new ImageIcon(ImageIO.read(
       new URL("http://gagandeepbali.uk.to/" 
           + "gaganisonline/swing/downloads/" 
           + "images/bulb.gif")));    
     } 
     catch(Exception e) 
     { 
       e.printStackTrace(); 
     } 
     demoButton = new JButton(buttonImage); 
     setExceptionalState(demoButton); 
     demoButton.addMouseListener(new MouseAdapter() 
     { 
      @Override 
      public void mouseEntered(MouseEvent me) 
      { 
       setNormalState(demoButton); 
      } 

      @Override 
      public void mouseExited(MouseEvent me) 
      { 
       setExceptionalState(demoButton); 
      } 
     }); 

     contentPane.add(demoButton); 
     frame.setContentPane(contentPane); 
     frame.setSize(300, 100); 
     frame.setLocationByPlatform(true); 
     frame.setVisible(true); 
    } 

    private void setExceptionalState(JButton button) 
    { 
     button.setBorderPainted(false); 
     button.setContentAreaFilled(false); 
    } 

    private void setNormalState(JButton button) 
    { 
     button.setBorderPainted(true); 
     button.setContentAreaFilled(true); 
    } 

    public static void main(String[] args) 
    { 
     Runnable runnable = new Runnable() 
     { 
      @Override 
      public void run() 
      { 
       new ButtonDemo().displayGUI(); 
      } 
     }; 

     EventQueue.invokeLater(runnable); 
    } 
} 

Answer 4

你會設置默認狀態爲：

button.setBorderPainted(false); 

T母雞你需要使用的MouseListener：上的mouseEntered

你會使用

button.setBorderPainted(true); 

和鼠標離開你會用

button.setBorderPainted(false);