Name: el35337 Date: 09/17/98


If you try the example, there'll show up a JButton
with the text "drawText". If you push the button,
the text "Hello" is written in XOR-mode.Instead of
just writing the text "Hello", the whole area of
the Graphics-context (which is the Graphics-context
of MyJPanel, here) turns to be white. This works
fine with java-JDK-1.1.6, though.

Source code:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import com.sun.java.swing.JFrame;
import com.sun.java.swing.JPanel;
import com.sun.java.swing.JButton;


class MyJPanel extends JPanel
{
  class MyJButton extends JButton implements ActionListener
  {
    public MyJButton(String name)
    {
      super(name);
      addActionListener(this);
    }

    public void actionPerformed(ActionEvent e)
    {
      Graphics g=MyJPanel.this.getGraphics();

      g.setColor(Color.black);
      g.setXORMode(MyJPanel.this.getBackground());


      g.drawString("Hello", 232, 100);
    }
  }

  public MyJPanel()
  {
    add(new MyJButton("drawText"));
    setBackground(Color.lightGray);
  }

  public Dimension getPreferredSize()
  {
    return new Dimension(500, 200);
  }
}

public class Test
{
  private JFrame frame;
  public MyJPanel panel;


  public void init()
  {
    MyJPanel panel=new MyJPanel();

    frame.setContentPane(panel);
    frame.pack();
    frame.setVisible(true);
  }

  public Test()
  {
    frame=new JFrame();
  }

  public static void main(String args[])
  {
    Test test=new Test();

    test.init();
  }
}



When the program has started, it shows the
following messges:

Font specified in font.properties not found [-b&h-lucida sans typewriter-bold-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans typewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-medium-i-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-bold-r-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans typewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-bold-i-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans typewriter-bold-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-linotype-times-medium-r-normal--*-%d-*-*-p-*-iso8859-1]
Warning:
    Cannot allocate colormap entry for default background
(Review ID: 38981)
======================================================================