Re: Layouts & Renderers, Gu to Px & vice-versa

[Ged Robinson <robinson.ged AT gmail.com>]

Got it!

Works beautifully.

Thanks very much for your quick help.

Br

Ged

On Wed, May 20, 2015 at 5:13 PM, guilhelm savin <guilhelm.savin AT gmail.com> wrote:

Hi Ged,

And thanks.

I guess your are looking for the features provided by the Camera : http://data.graphstream-project.org/api/gs-core/current/org/graphstream/ui/view/Camera.html#transformGuToPx%28double,%20double,%20double%29

Camera is provided by the View http://data.graphstream-project.org/api/gs-core/current/org/graphstream/ui/view/View.html#getCamera%28%29

Hope it helps.

G.

Le mer. 20 mai 2015 à 15:14, Ged Robinson <robinson.ged AT gmail.com> a écrit :

Hi,

Great library.  I love it.

I've come a long way since starting to use Graphstream and it's really doing useful things for me.

I am extending SpringBox layout.

My subclass of SpringBox overrides particleMoved method and 'remembers' a trail for specific nodes, identified by their id.

It also implements LayerRenderer in and I then can setForeLayoutRenderer on the view, with the custom layout object.

The idea is to leave a trail of n points behind a given node as it moves around the graph.

I'm having difficulty with something I thought would be very simple.

How can I reliably convert the graph units from particleMoved (I'm assuming they are graph units in there, right?) to pixels coordinates in my render method?

The view has a camera controller associated with it and can be zoomed & panned by the user at any time.

I thought this would be easy, but I'm not finding it so.

Any help would be greatly appreciated.  

Br,

Ged