Doru
I have the impression that
clipping and interaction can be defined by a "shape"
then the drawing can be either drawn in a canvas or delegate to
something else (for example for the cursor if there is an hardware
rendering).
I like this discussion and the feedback of igor because he is kicking
our asses much better than me in fact
because he has real argument while I just got feelings :)
Stef
Le 4/4/16 19:10, Tudor Girba a écrit :
Hi,
Indeed, this was not clear. The original idea of the shape was to be primarily
responsible for the clipping, but in the meantime the stroke and fill filtered
in the implementation. Alex, Andrei and I will now change the “shape” to only
be responsible for clipping and leave the drawing to the element. We will also
propose a solution for dealing with drawing and interaction.
Please stay tuned and thanks for this discussion.
Cheers,
Doru
On Apr 4, 2016, at 9:00 AM, stepharo <[email protected]> wrote:
I saw in bleedingEdge it is different and looks better.
Now I was wondering why shape did not do the rendering and I thought that this
is may be because a shape can be used for doing something else
than rendering. For example clipping or as igor mentioned defining the shape of
the interaction
drawOnSpartaCanvas: aCanvas
"Actually render receiver on aCanvas in local bounds.
Override to customize.
aCanvas is an instance of AthensCanvas
aCanvas must not be nil"
self assert: self shape path context isNotNil.
aCanvas
clipPreserveBy: self shape during: [
aCanvas paintGroup: [
aCanvas setPaint: self shape fillPaint.
aCanvas fillPreserve.
aCanvas paintMode source.
aCanvas setStrokePaint: self shape strokePaint.
aCanvas stroke ] ]
unprotectedFullDrawOnSpartaCanvas: aCanvas
"Draw the full structure on the given Canvas withing drawing bounds
without caring about any errors and visibility. I am responsible for
clipping and transforming canvas's path to local coordinates
to allow simpler actual drawing in drawOnAthensCanvas:
Additional checks should be implemented in fullDrawOnAthensCanvas:
aCanvas is an instance of AthensCanvas.
aCanvas must not be nil.
@see BlElement>>#fullDrawOnAthensCanvas:
@see BlElement>>#drawOnAthensCanvas:"
self shape adaptTo: self.
self shape path context: aCanvas.
aCanvas
transform: self transformation
during: [
self clippingStrategy
clip: self
on: aCanvas
during: [ self drawOnSpartaCanvas: aCanvas ]
childrenDuring: [ self drawChildrenOnSpartaCanvas: aCanvas ] ]
--
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