Graphics Object & Panel Sizing

We can't produce code to order, but are here to help you with code you have already produced yourself. These are the rules of this site

Just use

new JScrollPane( yourPanel );

- You give you applet/GUI app a BorderLayout.
- You place
                 new JScrollPane( yourPanel );
   in the center of it
- yourPanel is the JPanel containing more then the display area can show

Pardon me.  I didn't know I couldn't ask for code.  Here is what I have so far.  Keep in mind, the panel will be resizing to fit whatever contents I need to display, and here is the code that I am using:

this.pnl.setSize( new Dimension( preferredWidth, this.pnl.getHeight()));
this.pnl.setPreferredSize( new Dimension( preferredWidth, this.pnl.getHeight()));
this.pnl.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS );
this.pnl.setHorizontalScrollBarPolicy( JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS );
this.pnl.revalidate();

With this code, the panel resizes successfully, but the scroll bars do not work.

Thanks again,

-Eric

It's the panel whose size you should set and the scrollpane whose bars you should set

if you implement Scrollable in your JPanel, then you can control how big the steps are for the scrollbars in the parent JScrollpane :-)

I'm sorry again.  this.pnl refers to a JScrollPane  (force of habit... I declare all panel-like objects with a "pnl" prefix)

-Eric

you want to setSize and PreferredSize on the panel, and the rest on the scrollpane

TimYates,

Right now I have several panels on my Applet as part of a GUI.  WOuld I need to encapsulate the JScrolledPane inside its own JPanel?

-Eric

>>you want to setSize and PreferredSize on the panel, and the rest on the scrollpane

You could have a base panel, yes

LOL - wrong quote sorry!

>>WOuld I need to encapsulate the JScrolledPane inside its own JPanel?

You could have a base panel, yes, on which you placed other scroll panes

OK,  I'll try resizing a JPanel, and not the JScrolledPane.

I'll let you know how that works.

Thanks guys (and gals, as the case may be)

-Eric

OK, so I put the JScrolledPane inside a JPanel, then resized my JPanel instead.  2 things happened:

1)  The scroll bars still do not function (they are there, but do not do anything when clicked on)

2)  The JScrolledPanel does not appear to be resizing unless I implicitly call setBounds on it (Even though it is BorderLayout.CENTER, and I resize the parent)

-Eric

If someone could just tell me how to get the scrollbars working, I'd really appreciate it.  The panel resizes right, and the drawing is corrent, I just can't scroll.

Thanks,

-Eric

Set the preferred size of your panel and add it to your scroll pane

panel.setPreferredSize(new Dimension(w, h));
JScrollPane pane = new JScrollPane(panel);

then add your scroll pane to your component hierarchy.

Thank you CEHJ,

That example helped me get my code working.

-Eric

8-)