JSpinner的JButton到ImageIcon

Question

试图将JSpinner的JButton控制器替换为ImageIcon。但由于某种原因，它不听任何mouseclicks(installButtonListeners()在BasicSpinnerUI似乎添加MouseListener）。任何想法为什么以及如何解决？

public class SpinnerIconBtn extends JFrame { 

    public SpinnerIconBtn(){ 
     JSpinner spinner = new JSpinner(); 
     spinner.setUI(new JSpinnerArrow()); 

     this.add(spinner); 
     this.pack(); 
     this.setVisible(true); 
    } 

    class JSpinnerArrow extends BasicSpinnerUI { 

     @Override 
     protected Component createNextButton() { 
      Component c = createArrowButton(SwingConstants.NORTH); 
      c.setName("Spinner.nextButton"); 
      installNextButtonListeners(c); 
      return c; 
     } 

     @Override 
     protected Component createPreviousButton() { 
      Component c = createArrowButton(SwingConstants.SOUTH); 
      c.setName("Spinner.previousButton"); 
      installPreviousButtonListeners(c); 
      return c; 
     } 

     private Component createArrowButton(int direction) { 
      String path = "/Users/tst.png"; 
      JLabel icon = new JLabel(new ImageIcon(path)); 
      return icon; 
     } 
    } 

    public static void main(String[] args) { 
     new SpinnerIconBtn(); 
    } 
} 

Answer 1

installNextButtonListeners()和installPreviousButtonListeners()调用下面的方法：

private void installButtonListeners(Component c, 
            ArrowButtonHandler handler) { 
    if (c instanceof JButton) { 
     ((JButton)c).addActionListener(handler); 
    } 
    c.addMouseListener(handler); 
} 

的instanceof检查ArrowButtonHandler不会得到重视作为ActionListener您JLabel，它处理纺纱的原因。

您可以使用JButton的子类替代JLabel。

Answer 2

• 不改变图标，使用的paintIcon（）

• 变化的LayoutManager如果ArrowsButtons移动图标的太大

。

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

class Testing { 
    //int counter = 0;//proper setting 

    int counter = 7195;//testing hours 'tick over' correctly 
    JSpinner spinner = new JSpinner(); 
    JTextField editor = ((JSpinner.DefaultEditor) spinner.getEditor()).getTextField(); 
    java.text.DecimalFormat df = new java.text.DecimalFormat("00"); 

    public void buildGUI() { 
     spinner.setUI(new EndlessHoursUI()); 
     JFrame f = new JFrame(); 
     f.getContentPane().add(spinner); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.setVisible(true); 
    } 

    class EndlessHoursUI extends javax.swing.plaf.basic.BasicSpinnerUI { 

     public EndlessHoursUI() { 
      setTime(); 
     } 

     @Override 
     protected void installNextButtonListeners(Component c) { 
     }// do nothing 

     @Override 
     protected void installPreviousButtonListeners(Component c) { 
     }// do nothing 

     @Override 
     protected Component createNextButton() { 
      JButton btnNext = (JButton) super.createNextButton(); 
      btnNext.addActionListener(new ActionListener() { 

       @Override 
       public void actionPerformed(ActionEvent ae) { 
        changeSpinner(1); 
       } 
      }); 
      return btnNext; 
     } 

     @Override 
     protected Component createPreviousButton() { 
      JButton btnPrevious = (JButton) super.createPreviousButton(); 
      btnPrevious.addActionListener(new ActionListener() { 

       @Override 
       public void actionPerformed(ActionEvent ae) { 
        changeSpinner(-1); 
       } 
      }); 
      return btnPrevious; 
     } 
    } 

    public void changeSpinner(int amount) { 
     if (counter > 0 || amount > 0) { 
      counter += amount; 
      setTime(); 
     } 
    } 

    public void setTime() { 
     int hours = counter/3600; 
     int mins = (counter/60) % 60; 
     int secs = counter % 60; 
     String time = df.format(hours) + ":" + df.format(mins) + ":" + df.format(secs); 
     editor.setText(time); 
    } 

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

      @Override 
      public void run() { 
       new Testing().buildGUI(); 
      } 
     }); 
    } 
} 

Answer 3

没有设法解决它的答案。通过移除所有没有箭头的按钮来调整按钮，然后我将箭头移到一起：

private Component createArrowButton(int direction) { 

     JButton b = new BasicArrowButton(direction){ 

      private static final long serialVersionUID = 1L; 

      @Override 
      public void paintTriangle(Graphics g, int x, int y, int size, 
        int direction, boolean isEnabled) { 


       if(direction == NORTH){ 
        y +=3; 
       } 
       else if(direction == SOUTH){ 
        y -=3; 
       } 

       Color shadow = UIManager.getColor("controlShadow");     
       Color darkShadow = UIManager.getColor("controlDkShadow"); 
       Color highlight = UIManager.getColor("controlLtHighlight"); 

       Color oldColor = g.getColor(); 
       int mid, i, j; 

       j = 0; 
       size = Math.max(size, 2); 
       mid = (size/2) - 1; 

       g.translate(x, y); 
       if (isEnabled) 
        g.setColor(darkShadow); 
       else 
        g.setColor(shadow); 

       switch (direction) { 
       case NORTH: 

        for (i = 0; i < size; i++) { 
         g.drawLine(mid - i, i, mid + i, i); 
        } 
        if (!isEnabled) { 
         g.setColor(highlight); 
         g.drawLine(mid - i + 2, i, mid + i, i); 
        } 
        break; 
       case SOUTH: 
        if (!isEnabled) { 
         g.translate(1, 1); 
         g.setColor(highlight); 
         for (i = size - 1; i >= 0; i--) { 
          g.drawLine(mid - i, j, mid + i, j); 
          j++; 
         } 
         g.translate(-1, -1); 
         g.setColor(shadow); 
        } 

        j = 0; 
        for (i = size - 1; i >= 0; i--) { 
         g.drawLine(mid - i, j, mid + i, j); 
         j++; 
        } 
        break; 
       case WEST: 
        for (i = 0; i < size; i++) { 
         g.drawLine(i, mid - i, i, mid + i); 
        } 
        if (!isEnabled) { 
         g.setColor(highlight); 
         g.drawLine(i, mid - i + 2, i, mid + i); 
        } 
        break; 
       case EAST: 
        if (!isEnabled) { 
         g.translate(1, 1); 
         g.setColor(highlight); 
         for (i = size - 1; i >= 0; i--) { 
          g.drawLine(j, mid - i, j, mid + i); 
          j++; 
         } 
         g.translate(-1, -1); 
         g.setColor(shadow); 
        } 

        j = 0; 
        for (i = size - 1; i >= 0; i--) { 
         g.drawLine(j, mid - i, j, mid + i); 
         j++; 
        } 
        break; 
       } 
       g.translate(-x, -y); 
       g.setColor(oldColor); 
      } 
     }; 
     b.setBorder(BorderFactory.createEmptyBorder()); 
     //removes content area 
     b.setContentAreaFilled(false); 
     b.setInheritsPopupMenu(true); 
     b.setOpaque(false); 
     b.setBackground(color); 

     return b; 
    }