CPView is missing rotateByAngle method

[enquora]

RotationTests.zip
Do we have an entirely distinct (from Objective-C) of accomplishing arbitrary rotation of a view or am I correct assuming it isn't currently possible without directly manipulating the underlying DOM?

The problem is deeper, as demonstrated by the attached reductions in each of Objective-C and Objective-J — which highlight a discrepancy in behaviour.

In Objective-C, setting a views' wantsLayer: automatically creates a layer, which one can directly apply an affine transformation to.

In Objective-J, it appears necessary to manually create the layer, then implement (void)drawInContext:(CGContextRef)ctx.
This suggests incomplete implementation of layer functionality compared to the reference implementation.

[cappbot]

Milestone: Someday. Label: #new. What's next? A reviewer should examine this issue.

[daboe01]

I do not see a universal and clean way to implement a tranformation matrix that works transparently with every view. This is because CPView can use different means of drawing, either canvas or DOM directly.
IMHO our abstraction is not deep enough to make rotateByAngle: work within CPView.

[daboe01]

-#new
+#needs-discussion

[cappbot]

Milestone: Someday. What's next? A reviewer should examine this issue.