Re: flat JButtons

  To: comp.lang.java.gui
On 31-5-2008 16:36, RVince wrote:


You mean like buttons on a JToolBar?

You could use setContentAreaFilled(true) when the mouse is over the
button and setContentAreaFilled(false) when not. A MouseListener can be
used to detect when the mouse is over the button or not.

This is demonstrated in the following SCCCE:

package test;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class FlatRolloverButtons extends JFrame {

    private static final long serialVersionUID = 1L;

    public static void main(String[] args) {
       SwingUtilities.invokeLater(new Runnable() {
          public void run() {
             FlatRolloverButtons thisClass = new FlatRolloverButtons();
             thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             thisClass.setVisible(true);
          }
       });
    }

    private JButton jButton1 = null;

    private JButton jButton2 = null;

    private JButton jButton3 = null;

    private JButton jButtonExit = null;

    private JPanel jContentPane = null;

    private JPanel jPanelMain = null;

    private MouseListener rolloverButtonListener;

    public FlatRolloverButtons() {
       super();
       initialize();
    }

    private JButton getJButton1() {
       if (jButton1 == null) {
          jButton1 = new JButton();
          jButton1.setText("Button 1");
          initializeAsFlatRolloverButton(jButton1);
       }
       return jButton1;
    }

    private JButton getJButton2() {
       if (jButton2 == null) {
          jButton2 = new JButton();
          jButton2.setText("Button 2");
          initializeAsFlatRolloverButton(jButton2);
       }
       return jButton2;
    }

    private JButton getJButton3() {
       if (jButton3 == null) {
          jButton3 = new JButton();
          jButton3.setText("Button 3");
          initializeAsFlatRolloverButton(jButton3);
       }
       return jButton3;
    }

    private JButton getJButtonExit() {
       if (jButtonExit == null) {
          jButtonExit = new JButton();
          jButtonExit.setText("Exit");
          jButtonExit.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                System.exit(0);
             }
          });
       }
       return jButtonExit;
    }

    private JPanel getJContentPane() {
       if (jContentPane == null) {
          jContentPane = new JPanel();
          jContentPane.setLayout(new BorderLayout());
          jContentPane.add(getJButtonExit(), BorderLayout.SOUTH);
          jContentPane.add(getJPanelMain(), BorderLayout.CENTER);
       }
       return jContentPane;
    }

    private JPanel getJPanelMain() {
       if (jPanelMain == null) {
          jPanelMain = new JPanel();
          jPanelMain.setLayout(new FlowLayout());
          jPanelMain.add(getJButton1(), null);
          jPanelMain.add(getJButton2(), null);
          jPanelMain.add(getJButton3(), null);
       }
       return jPanelMain;
    }

    private MouseListener getRolloverButtonListener() {
       if (rolloverButtonListener == null) {
          rolloverButtonListener = new MouseAdapter() {
             public void mouseEntered(MouseEvent e) {
                Object source = e.getSource();
                if (source instanceof AbstractButton) {
                   AbstractButton button = (AbstractButton) source;
                   button.setContentAreaFilled(true);
                }
             }

             public void mouseExited(MouseEvent e) {
                Object source = e.getSource();
                if (source instanceof AbstractButton) {
                   AbstractButton button = (AbstractButton) source;
                   button.setContentAreaFilled(false);
                }
             }
          };
       }
       return rolloverButtonListener;
    }

    private void initialize() {
       this.setSize(300, 200);
       this.setContentPane(getJContentPane());
       this.setTitle("JFrame");
    }

    private void initializeAsFlatRolloverButton(AbstractButton b) {
       b.addMouseListener(getRolloverButtonListener());
       b.setContentAreaFilled(false);
    }

}
// END OF FlatRolloverButtons

--
Regards,

Roland

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