JTextArea question

#1
seanbp

Posted 17 July 2010 - 10:00 PM

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7 posts

Why do I need JScrollPane to get JTextArea's layout to behave properly?

    private JPanel Panel () {

        JPanel panel = new JPanel();

        Font font = new Font("Arial", Font.BOLD, 18);

        panel.setLayout(new BorderLayout());

        inText = new JTextArea();

        inText.setEditable(false);

        inText.setFont(font);

        inText.setLineWrap(true);

        inText.setWrapStyleWord(true);

        JScrollPane inTextScroller = new JScrollPane(inText, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

        panel.add(inTextScroller, BorderLayout.CENTER);


        outText = new JTextArea(2, 1);

        outText.addKeyListener(listen);

        outText.setFont(font);

        outText.setLineWrap(true);

        outText.setWrapStyleWord(true);

        JScrollPane outTextScroller = new JScrollPane(outText, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

        panel.add(outTextScroller, BorderLayout.SOUTH);

        return panel;

    }

#2
wim DC

Posted 19 July 2010 - 02:36 AM

Writes binary right handed and hex left handed

Members
2,084 posts

What's wrong with the layout without scrollpanes?

#3
seanbp

Posted 19 July 2010 - 09:55 AM

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7 posts

The dimensions are all wrong; it gets way too large. I need to resize my frame just to see the other text area.

#4
wim DC

Posted 19 July 2010 - 10:47 PM

Writes binary right handed and hex left handed

Members
2,084 posts

They are pretty normal with me:

2hs421t..jpg 20.57K 46 downloads

#5
seanbp

Posted 19 July 2010 - 11:04 PM

Newbie

Members
7 posts

THIS is is buggy code... THAT was using a scroller. sorry for the confusion.

    private JPanel panel () {

        JPanel panel = new JPanel();

        panel.setLayout(new BorderLayout());

        Font font = new Font("Arial", Font.BOLD, 12);

        Listen listen = new Listen();


        inText = new JTextArea();

        inText.setEditable(false);

        inText.setFont(font);

        inText.setLineWrap(true);

        inText.setWrapStyleWord(true);

        JScrollPane inTextScroller = new JScrollPane(inText, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

        panel.add(inTextScroller, BorderLayout.CENTER);


        outText = new JTextArea(2, 1);

        outText.addKeyListener(listen);

        outText.setFont(font);

        outText.setLineWrap(true);

        outText.setWrapStyleWord(true);

        //JScrollPane outTextScroller = new JScrollPane(outText, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

        panel.add(outText, BorderLayout.SOUTH);


        return panel;

    }

#6
wim DC

Posted 19 July 2010 - 11:25 PM

Writes binary right handed and hex left handed

Members
2,084 posts

That looks like

Test2.JPG 11.85K 173 downloads...

Tested with:

public static void main(String[] args) {    
        JFrame frame = new JFrame("test");
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        Font font = new Font("Arial", Font.BOLD, 12);


        JTextArea inText = new JTextArea();
        inText.setEditable(false);
        inText.setFont(font);
        inText.setLineWrap(true);
        inText.setWrapStyleWord(true);
        inText.setText("test text");
        inText.setBackground(Color.cyan);
        JScrollPane inTextScroller = new JScrollPane(inText, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        panel.add(inTextScroller, BorderLayout.CENTER);

        JTextArea outText = new JTextArea(2, 1);
        outText.setFont(font);
        outText.setLineWrap(true);
        outText.setWrapStyleWord(true);
        //JScrollPane outTextScroller = new JScrollPane(outText, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        panel.add(outText, BorderLayout.SOUTH);

        
        
        
        
        frame.add(panel);
        frame.setSize(800,600);
        frame.setVisible(true);
        
    }

#7
seanbp

Posted 19 July 2010 - 11:46 PM

Newbie

Members
7 posts

must be unique to my os or probably the environment. thanks for the help.

#8
wim DC

Posted 19 July 2010 - 11:53 PM

Writes binary right handed and hex left handed

Members
2,084 posts

Java should be OS-independant so OS shouldn't really matter. Perhaps your screen DPI can mess up layout if it's set to something different than 96DPI..

#9
seanbp

Posted 20 July 2010 - 10:01 AM

Newbie

Members
7 posts

DPI is 96.
You're right, it should be independent. I'm using OpenJDK. I've attached some screenshots...

The second text area resizes to it's content and overlaps the other text area. Perhaps the two are incompatible with each-other with respect to the layout.