🚀 go-pugleaf

Hi John,

I use the JScrollPane component.
As to the thumbnail display, I currently develop my own little JPanel and
controler class to create and display thumbnails. The application is a
client to an Oracle 8i database where for each dataset a normal image and a
small thumbnail image is stored. Depending which tabpane the user has
selected, he will see a large image of a selected dataset or an array of
thumbnails representing a certain section of the data. I think I can resolve
the problems with the thumbnails, but hoped that Flow Layout could make the
implementation of the display a little easier.

Actually to me the logic, implemented in the JScrollPane is not very
straightforward. If I set the horizontal scrollbar property to NEVER, I'd
except that the scrollpane / viewport would *not* allow its child to have
any size it desires. At least there should be a possibility to control this
behaviour. But this is probably a request, which should be directed to the
Swing developers.

Anyway I would appreciate, if you could send me your code regarding the Flow
Layout, as you mentioned.

Thanks and regards

Thomas

Thomas.Guelden@t-online.de


"John McGrath [TeamB]" <ng-b@JPMcGrath.net> schrieb im Newsbeitrag
news:MPG.149685b74a9e9bc4989d95@forums.borland.com...
> On Sun, 3 Dec 2000 15:22:19 +0100, "Thomas G�lden \(p\)"
> <Thomas.Guelden@t-online.de> wrote:
>
> > I try to develop an image browser, where thumbnails of images
> > are put in rows.  So to use the FlowLayout as the layout for my
> > panel seems to be the right choice, because it puts components
> > in a new row when one row is full, depending on the width of
> > the panel. However, when the rows extend the height of my panel
> > I would like to show a scrollbar on the right of the panel.
>
> This is a problem I have dealt with on a number of occasions.  I have
> some example code at the office that I can post for you, but I do not
> have it right now.  I will try to get to it tomorrow.  Actually, I have
> a program that displays image thumbnails exactly as you describe, but
> alas, I cannot post that.
>
> Question: Are you using an AWT ScrollPane or a Swing JScrollPane?
>
> Here is a brief description of the problem:
>
> When asked for the preferred size of a container, a FlowLayout will
> return a size that assumes its children will be laid out in a single
> row.  This is because there is no mechanism to tell the child the
> maximum width available.
>
> When a ScrollPane or the JViewport of a JScrollPane is laid out, it
> gives the child component any size it desires.  After all, that is what
> the scroller is supposed to do.  So the scroller gives the child
> component exactly the size it asks for, and the child is laid out in a
> single row.
>
> --
> Regards,
>
> John McGrath [TeamB]
>
> ---------------------------------------------------
> Before sending me e-mail, please read:
>     http://www.JPMcGrath.net/newsgroups/e-mail.html