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Home » Eclipse Projects » GEF » Is it possible to do zooming in a separate thread?
Is it possible to do zooming in a separate thread? [message #231085] Mon, 26 February 2007 15:49 Go to next message
Steinar Bang is currently offline Steinar BangFriend
Messages: 108
Registered: July 2009
Senior Member
I have a GEF viewer displaying a big ER diagram. Zooming to show the
entire ER schema, and zooming in to show a smaller part of the
diagram, takes a lot of time.

Is it possible to do the zooming operations in a separate thread, so
that the GUI doesn't appear to be frozen while the ZoomManager and
viewer uses time on whatever it uses time on?

Thanx!


- Steinar
Re: Is it possible to do zooming in a separate thread? [message #231182 is a reply to message #231085] Wed, 28 February 2007 06:25 Go to previous messageGo to next message
Eclipse UserFriend
Originally posted by: none.unknown.com

You need to figure out what's taking up so much time. Zooming is pretty
much all UI stuff (painting), so it can't be moved to a separate thread.
How big is your diagram? You're not animating the zoom, are you? Do you
have any figures that take a lot of time to paint? Are you using advanced
graphics? How many figures/editparts are there in your diagram?

"Steinar Bang" <sb@dod.no> wrote in message
news:87hct87wbx.fsf@bang.priv.no...
>I have a GEF viewer displaying a big ER diagram. Zooming to show the
> entire ER schema, and zooming in to show a smaller part of the
> diagram, takes a lot of time.
>
> Is it possible to do the zooming operations in a separate thread, so
> that the GUI doesn't appear to be frozen while the ZoomManager and
> viewer uses time on whatever it uses time on?
>
> Thanx!
>
>
> - Steinar
Re: Is it possible to do zooming in a separate thread? [message #232144 is a reply to message #231182] Sun, 25 March 2007 12:58 Go to previous message
Steinar Bang is currently offline Steinar BangFriend
Messages: 108
Registered: July 2009
Senior Member
>>>>> "Pratik Shah" <none@unknown.com>:

> You need to figure out what's taking up so much time. Zooming is pretty
> much all UI stuff (painting), so it can't be moved to a separate thread.
> How big is your diagram? You're not animating the zoom, are you?

Not intentionally. I may be, due to cut'n paste stuff I don't
entirely understand, from GEF examples, though...

> Do you have any figures that take a lot of time to paint?
> Are you using advanced graphics?

I'm not sure what's advanced or not. There's the table figure, which:
- extends Figure
- has a verdtical toolbar layout holding a label and a fields figure
- has a border, a background colour and a foreground color and is opaque
(in short: it's a box with a label at the top)

The fields figure is a child of the table figure:
- extends figure
- has a flow layout
- has a border, background and foreground colours and is opaque

The fields themselves are just labels dropped into the fields figure.

> How many figures/editparts are there in your diagram?

For edit parts, the numbers are:
- 916 table edit parts
- 13020 field edit pars (children of tables)
- 542 relationship edit parts

That would make the total number of figures:
916 table figures
916 table label figures
916 fields figures
13020 labels for the fields
===========================
15768 figures total

In addition comes 542 relationship figures (which may be handled
separately...?).

Is that a lot?
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