Added more configurable options

[beasteers]

Now you can enable/disable handles using props.

rotateEnabled={false} lets you turn off rotation.
translateEnabled={false} lets you turn off dragging.
scaleEnabled={false} lets you turn off scaling. This definitely has a problematic name similarity to disableScale. I'm not quite sure how best to resolve that.
open={false} allows you to disable free transform all together.
scaleHandles={['tl', 'tr', ...]} lets you specify exactly which handles you want to use. I added some shortcuts for convenience corners and sides as those are probably the most frequently used.

I also attempted to add props for scaleFromCenter and aspectRatio so they could be enabled all the time, but free-transform didn't seem to be listening to those settings. It seems that when you pass them into free-transform::scale, their values are being overwritten. The problem is being caused on line 77 of free-transform/lib/scale.js and I'm not really sure why that line is being used. But I can't find the repo to fork it or anything so they just won't do anything.

[codecov]

Codecov Report

Merging #1 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #1   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           3      3           
  Lines          45     62   +17     
=====================================
+ Hits           45     62   +17

Impacted Files	Coverage Δ
src/ScalePoint.js	100% <ø> (ø)	⬆️
src/Transform.js	100% <100%> (ø)	⬆️

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[skmail]

Hi Ben,
a big thanks for your PR, i will make some modifications and merge

Regards

[beasteers]

Additions:
I added these events to allow users more control over their transformations.

// these three fallback to onUpdate if they're not specified
onTranslate
onRotate
onScale

onTranslateStart
onRotateStart
onScaleStart

onTranslateEnd
onRotateEnd
onScaleEnd

I also updated it to work with this pull request on free-transform which fixed the behavior of scaleFromCenter and aspectRatio as mentioned above.

Aspect ratio can also be a float specifying a fixed aspect ratio to snap the transformation to. This isn't necessary most of the time, but I'm planning on having a toggle for that in an app I'm working on so I figured I'd include it.

I updated the example to reflect some of the added features.

[beasteers]

Yeah no problem! This is a really nice repo. It solves a problem I've been having and cleans up my code significantly.