Re: [gef-dev] FigureCanvas and Viewport

["Tomas Pinos" <tomas@xxxxxxxxxxxxxxx>]

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