Re: [gef-dev] FigureCanvas and Viewport

[Randy Hudson <hudsonr@xxxxxxxxxx>]

The Figure inside the Viewport must
return the appropriate preferredSize().  One way to do this is to
use an XYLayout.
Another way is to use a FreeformLayer
as the Viewports contents.  But you must also use a FreeformViewport.

"Tomas Pinos" <tomas@xxxxxxxxxxxxxxx> Sent by: gef-dev-admin@xxxxxxxxxxx 11/08/2002 09:58 AM Please respond to gef-dev

To:        <gef-dev@xxxxxxxxxxx>         cc:                 Subject:        Re: [gef-dev] FigureCanvas and Viewport

Hi,
 
I experienced the same "problem".
You write that your figure contains a number of images - how do you calculate
their preferred size and the size of their parent figure? Have you implemented
a special layout for it? I would suggest to check the figure sizes - if
they were "large" enough, the canvas would scroll probably.
 
Hope it helps,
Tomas
 
----- Original Message ----- 
From: Joel
G Rivera-Gonzalez 
To: gef-dev@xxxxxxxxxxx

Sent: Friday, November 08, 2002 12:15
AM
Subject: [gef-dev] FigureCanvas and
Viewport

Hello to all
 
All right here is the deal…
I need to do an application using draw2d.
 Everything is going smoothly until I tried to implement scrollbar
functionality on the application.  I am trying to use FigureCanvas
(canvas) and Viewport (viewport).  The viewport contains n number
of images.  Those images can be move around the canvas, so I need
to expand and shrink it as needed…The scroll area (the canvas) should
be the size of the shell and the viewport should be as big as needed…the
problem is I thought that if the viewport is bigger than the canvas it
should allow you to scroll around…but this is not happening…any one have
a suggestion?
 
Here is more-or-less what I’m doing….
 
      FigureCanvas canvas
= new
FigureCanvas(shell);
Viewport vp = new
Viewport();
      ...
      vp.setSize(1000, 1000);
...
canvas.setSize(500,  500);
      canvas.setScrollBarVisibility(FigureCanvas.ALWAYS);
      ...
canvas.setContents(vp);
      ...   
      shell.open();
      shell.pack();
 
 
Thanks…

Best Regards,
Joel
--------------------------------------
Joel G Rivera-Gonzalez
IBM TJ Watson Research Center
19 Skyline Dr
Hawthorne, NY 10532-2119