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mover() inconsistency

See original GitHub issue

(Manually migrated from GitLab issue 3 reported by @kranich)

In Cinderella, mover() yields the element which has last been moved. In cindyjs, mover() yields the element which is currently being moved.

Hence, mover produces different behaviour on mouse up (_?_ in cindyjs vs. the element which has last been moved in Cinderella).

(Comment originally by @kortenkamp)

The Cinderella behavior is the preferred one, IMHO. Of course, one could create a workaround and store the current moving element, but this creates ugly code.

Also needs a comment from @richter-gebert

Issue Analytics

State:
Created 8 years ago
Comments:6 (6 by maintainers)

Top GitHub Comments

1reaction

kortenkampcommented, Jul 16, 2016

And let me add something else: It is essential to receive the last mover() in the mouse up event! Just consider the following code:

In mouse down:

mover().size=20

In mouse up:

mover().size=5

This is not uncommon. So… I am strongly opposed to setting mover() to null already in mouse up. It might be ok after mouse up.

1reaction

gagerncommented, Jul 15, 2016

It was decided that the CindyJS behavior should stay, and that Cinderella should use the CindyJS semantics when executing the code as CindyScript 3. The main benefit is that this allows scripts to easily detect whether some element is being moved or not. The woraround to store the mover in a variable is easy enough that essentially no functionality is lost, even if some code may need some adjustments.

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