Yes. It should be the platform you need. Doru
On Mon, Jul 7, 2014 at 11:21 AM, Peter Uhnák <i.uh...@gmail.com> wrote: > Thank you for all the suggestions. I looked more closely at Roassal and it > seems that it might have everything we would need. Basically the next step > in the project is to create extensible drawing tool for modelling languages > (UML/Petri nets/what have you), so we need to be able to draw any arbitrary > shapes and their compositions (e.g. UML StateMachine composite state might > have plethora of subelements). So If I understand correctly Roassal/Trachel > should be able to provide us with everything at the visual layer or it is > possible to (easily) extend it and add custom shapes. > > Peter > > > On Sun, Jul 6, 2014 at 1:27 PM, Nicolai Hess <nicolaih...@web.de> wrote: > >> 2014-07-06 9:54 GMT+02:00 stepharo <steph...@free.fr>: >> >> Hi peter >>> >>> I hope that igor will see your mail now I will try to reply and this may >>> be a bit wrong :) >>> >>> >>> Hello, >>>> >>>> I'm currently working on drawing engine (à la Squeak Connectors) as a >>>> part of school project and have a couple of questions about Morphs and >>>> Athens and would be grateful if someone could enlighten me. >>>> >>>> What is the difference between "Morph>>#drawOn:" and >>>> "Morph>>#drawOnAthensCanvas:" if I draw on AthensCairoSurface? Should I >>>> always use the latter or will there be switch to the former once everything >>>> is rendered using Athens? >>>> >>> >> AthensWrapMorph fullDrawOn method will call its submorphs drawOn: method >> with an AthensCanvas. >> Now, if you have an AthensCanvas (from the AthensWrapMorph) and your own >> Morph does not implement drawOnAthensCanvas, then >> Morph>>#drawOnAthensCanvas is called which just >> draws an rectangle from your Morphs bound. For example, put a >> PolygonMorph on an AthensWrapMorph. It is drawn as a rectangle, because >> PolygonMorph does not know (yet) how >> to draw itself with athens. >> >> If you have new a Morph that is just container of other Morphs than you >> don't need to change anything. Just make sure your toplevel Morph >> is wrapped by an AthensWrapMorph. But If you have a Morph, that >> subclasses another Morph that overrides drawOnAthensCanvas, you'll have to >> reimplent >> this as well. >> For example, MenuItemMorph subclasses StringMorph and StringMorph >> implements its own drawOnAthensCanvas. If you put a MenuMorph in a >> AthensWrapMorph it will be drawn >> like a plain StringMorph not like a MenuItemMorph (without icons and >> arrows for submenus etc). >> >> >>> One of the idea is that you have a wrappingMorph that convert the >>> Morphic to Athens drawing. This way >>> you can use athens and still be in a non athens world, then we will >>> switch to athens you will just have to unwrap your (athensihed morph). >> >> >>> Now about the granularity question it depends, what I would do is to >>> have one wrapper and be in a athens world. >>> Did you check the trachel layer in Roassal? >>> >> >> I may be wrong, but I think we have to be carefull that not everyone >> invents its own "draw on athens layer". >> >> I would suggest: >> - build it on top of roassal / trachel, i.e. draw always with athens. >> - build it as Morphs and implement drawOnAthensCanvs if needed. >> >> Nicolai >> >> >> >>> >>> What would be good is that >>> - you define drawOnAthensCanvas: for all the shapes you need and we >>> integrate them into Pharo >>> - like that slowly we will get ready to switch to Athens >>> >>> >>> Should AthensMorphWrap be around every morphic element or just the top >>>> level? i.e. >>>> CanvasMorph (owner of the surface) will have a single submorph >>>> AthensMorphWrap which will then hold all the morphs (EllipsisMorph, >>>> RectangleMorph, ...) which are being drawn on the canvas. >>>> >>> I think so. >>> This is what Roassal is doing. >>> Please keep us aware of your progress and do not hesitate to ask >>> questions and we are REALLY interested in your project >> >> So if you have athens draw on method please send them to us. >>> >> >>> Stef >>> >>> >>>> Thanks, >>>> Peter >>>> >>> >>> >>> >> > -- www.tudorgirba.com "Every thing has its own flow"
