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coordinate mapping [message #148298]

Sat, 21 August 2004 12:23

Bernd Hofner
Messages: 59
Registered: July 2009

Member

Hello,

I'd like to use the XYLayout to generate a simple technical drawing.
Naturally, my model coordinates are in some real-world unit, like
millimetres.
I guess that draw2d uses pixel coordinates when placing figures.

How do I map between the two coordinate systems?

Is it possible to set a org.eclipse.draw2d.geometry.Transform object on a
view?

Or do I have to translate my model coordinates to the draw2d coordinates
each time I update my EditPart/Figure from the model?

If so, how do I get the scaling factors?
I can compuse the largest x/y extend of my model components and would get
something like realWorldMaxX and realWorldMaxY.
To get a scaling factor I would need the x/y extend of the canvas, which
probably changes if I use
the GEF Zooming features.

Any hints?

Cheers,

Bernd

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