[Moose-dev] Re: [Mondrian] Where can we set the canvas to draw elements?

That's exactly what I want to do: 'to pass the AthensCanvas into that drawOn: method. But I don't know how to do that,i don't know where to say: 'the default canvas to use now is RomeCanvas'

2010/6/15 Tudor Girba <tudor.girba(a)gmail.com> Hi Cyrille, Ok, I think I see where the confusion comes from. Every Morph is passed the actual Canvas in the drawOn: method. This is part of the rendering loop. What you want is to pass the AthensCanvas into that drawOn: method. Does this help? Doru On 15 Jun 2010, at 13:50, Cyrille Delaunay wrote: Ok. But, first, I don't why MOCanvas is a subclass of Morph (and not a subclass of Canvas) ? MOCanvas doesn't define any 'drawRectangle:' or 'drawSomething' methods, like usual canvas does. By setting some halt in the 'shape-classes' (MORectangleShape, MOEllipseShape), I saw that the method display:on: is called with a 'FormCanvas' as parameter. So somewhere in the code, somoene is telling to MOCanvas: drawOn: aFormCanvas. But it seems to not be in Mondrian 2010/6/15 Tudor Girba <tudor.girba(a)gmail.com> Hi, MOCanvas is the canvas, it is a subclass of Morph :). Doru On 15 Jun 2010, at 13:23, Cyrille Delaunay wrote: When I look to MOCanvas, I don't find any initialization of the concrete Canvas used . There is only a Method MOCanvas >> drawOn:, that then let a MORoot object call MORoot>>displayOn:, that then dispatch the work to each 'shape-class'. But I still don't find where the 'concrete' canvas is used (maybe I should wear glasses :)) 2010/6/15 Tudor Girba <tudor.girba(a)gmail.com> Hi, now something important is that mondrian is barely usable for us: DSM, package blueprint, torch are all slow. I would really like to see some pragmatic solutions to be found. Like not computing all the blocks all over the time. This is what we are already discussing, but until now it is not clear what exactly generates the slowness. I believe the problem comes from the edges, but we have to take a more systematic look. The other thing that has an impact is that right now Mondrian computes everything lazily, so even if the visualization appears, scrolling might still be problematic the first time you go through the entire picture. So, testing should also take this into account. Doru Stef On Jun 15, 2010, at 12:43 PM, Tudor Girba wrote: Hi Cyrille, The canvas is defined in MOCanvas. This canvas is embedded in MOBrowser and MOEasel, which in their turn create a StandardWindow that holds the MOCanvas. Just to inform the others, Cyrille is experimenting with adding the Athens canvas (which provides an abstraction over Cairo, Balloon and possibly others) behind Mondrian. Cheers, Doru On 15 Jun 2010, at 11:42, Cyrille Delaunay wrote: Hello, I have been looking a bit for the place where we set the canvas to use in Mondrian, but I didn't find. I know that all shapes are drawn on a FormCanvas, but there is no references to FormCanvas in mondrian classes. I just saw that there is a 'defaultCanvasClass' method in the class Form for example, so maybe such a method is use somewhere in the code. Does somoene know the way to set a new Canvas to Mondrian ? _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev -- www.tudorgirba.com "Presenting is storytelling." _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev -- www.tudorgirba.com "There are no old things, there are only old ways of looking at them." _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev -- www.tudorgirba.com "One cannot do more than one can do." _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev -- www.tudorgirba.com "Reasonable is what we are accustomed with." _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev