Name: el35337 Date: 04/03/98


The setDividerLocation(double) in JSplitPane
only works when called after the SplitPane has
been mapped into a frame. It needs to be
fixed so that it works when the JSplitPane is
first instantiated.
Here is a test case. The divider should be in
the exact center of the panel. Instead, it is
at some arbitrary default position.

It isn't practical to set the divider position
after frame mapping because it may be located
in an arbitrary container.
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import java.awt.swing.JTextArea;
import java.awt.swing.JSplitPane;
import java.awt.swing.JScrollPane;
import java.awt.swing.JFrame;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.BorderLayout;

class T {
    static final String areaText =
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n" +
        "A\nB\nC\nD\nE\nF\n";

    public static void main(String args[]){
        JTextArea area1 = new JTextArea(areaText);
        JTextArea area2 = new JTextArea(areaText);
        JScrollPane scroll1 = new JScrollPane(area1);
        JScrollPane scroll2 = new JScrollPane(area2);
        scroll1.setMinimumSize(new Dimension(10,10));
        scroll2.setMinimumSize(new Dimension(10,10));
        JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,scroll1,scroll2);

        split.setDividerLocation(0.5); // <==== THE BUG: THIS IS IGNORED

        JFrame frame = new JFrame();
        Container pane = frame.getContentPane();
        pane.setLayout(new BorderLayout());
        pane.add("Center",split);
        frame.pack();
        frame.setSize(300,300);
        frame.setVisible(true);
        }
    }
(Review ID: 27794)
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