Name: ks88420 Date: 08/29/2000


java version "1.2.2"
Solaris VM (build Solaris_JDK_1.2.2_05a, native threads, nojit)


Calling JFileChooser.setOpaque(false) does not make the entire component
transparent, because nested JPanels within its component hierarchy are opaque.
The example below illustrates the problem. I expect the red background to show
through the entire JFileChooser (except for the JScrollPane, JTextField, and
JComboBox, of course), not just the red bands that you see in the example. All
buttons, labels, and panels should be transparent.

The layout for the JFileChooser in general is not good. Based on what I read in
the Java user interface guidelines book by Sun, I would expect the left edges of
the labels to line up flush with the left edge of the scrollpane, the buttons to
align flush with the right edge, only 5 pixels of padding between components,
etc. It would look much cleaner if GridBagLayout were used to do the internal
layout of the components, rather than relying on multiple Box.Filler objects as
the current implementation does.

See the screenshot at http://www.dystance.net/~markl/tmp/filechooser.jpg for an
idea of how this component *could* be made to look, and notice that the textured
background shows through the entire component.


============================

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

public class JavaTest2 extends JFrame
  {
  private JFileChooser fc;
  
  public static void main(String args[])
    {
    JavaTest2 jt = new JavaTest2();
    jt.setVisible(true);
    }

  public JavaTest2()
    {
    super("Test");

    JPanel p = (JPanel)getContentPane();
    p.setBackground(Color.red);

    p.setLayout(new GridLayout(1, 0));


    JFileChooser fc = new JFileChooser(new File("."));
    fc.setOpaque(false);

    p.add(fc);
    pack();
    }

  }
(Review ID: 109047)
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