Thread: JScrollPane not showing scroll bars

Hi everyone,

I'm developing a new Java aplication and my JScrollPane doesn't show the scroll bars.

I'm able to see the JScrollPane border and i can add elements to it, but when those elements pass beyond the given size i have no way to see them because the scroll bars aren't showing up.

Here is the source code i'm using for the scrollPane:

public void Display(Rectangle location) {       
        Color menu_color = null;  
        display = new JScrollPane();
        display.setLayout(null);
        display.setBackground(menu_color);       
        display.setBounds(location);
        display.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        display.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        display.setVisible(true);
        display.setViewportBorder(new LineBorder(Color.BLACK));
        content.add(display); // Container
     }

Can anyone give me a hand?

Thanks

Thanks for the info Furable.

I changed the layout to:

 display.setLayout(new ScrollPaneLayout());

However, I'm not very experienced in working with viewports .

I will try to find an example.

Originally Posted by Stx

Thanks for the info Furable.

I changed the layout to:

 display.setLayout(new ScrollPaneLayout());

No, just leave JScrollPane's layout alone. It is already set to the correct layout and so messing with it only invites trouble.

However, I'm not very experienced in working with viewports .

I will try to find an example.

Your best bet is to go to the scrollpane tutorial.

Thanks Fubarable.

I got the scroll bars working.

However, with the solution i have i can't add a JLabel to my text area, I can only append text.

       Color menu_color = null;  
        menu = new JTextArea();
        menu.setEditable(false);
        menu.setBackground(menu_color);
        JScrollPane display = new JScrollPane(menu);
        display.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        display.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);     
        display.setBounds(location);
        content.add(display);

If i do area.add(JLabel), this doesn't show up.

Got any ideas on how i can successfully add JLabels to the textarea?

Thanks

I created some JLabels that contain formatted text (with position, font color).

For example:

JLABEL header = (TeamA TeamB Score)
header.setBounds(screen_center);
header.setFont(black);

JLAbel data = (PlayerX PlayerY 1-1)
data.setBounds(screen_center+height); // add some space between header and data
data.setFont(black);

This JLabel is constructed based on a database.

Since I already have the data in a JLAbel, my goal was to put the already constructed JLAbel in the textarea.

I didnt find any way to put the direct text that exists in the database in a determined position of the textarea and to give it some color.

I'm thinking that you're almost trying in a round about way to create your own version of JTable. Why not simply use a JTable directly to display your data? You can use headers and such with this creature.

Ok, i think I understand your advice: instead of having a jtextarea, i create a JTable put my data in it and then create a scroll pane with the jtable right?

Yep, that's correct.