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@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 ?
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