Open Radar

 
Summary:
The Core Data's Canvas Editor screws up regularly.

Steps to Reproduce:
Open Core Data's Canvas Editor work with it for more than a minute.

Expected Results:
Works as expected.

Actual Results:
See attached videos. (clicks being ignored, info panel not reacting to selection-change, canvas not in sync with data model, etc)

Regression:
Worked in v3 and early v4.

Notes:
I marked it as always reproducable as it will bite you at least once in a working session. Always.

There is another drawing bug, which I could not reproduce on video, in which an entity node stops refuses to synchronize with its attributes/relationships. The only way to re-synchronize it is to add a new attribute/relationship (-> synced) and then remove it.

Straight cornered edges make more complex entity relationships visually unclear. Curved edges would be an improvement.

Also, how about some _pretty_ node and edge drawing? The current drawing is damn ugly.

Further more: holding down [shift] with [arrow keys] should increasemovement distance by factor 10, not decresee it. Xcode does it backwards. [shift] > [no-shift] is a de facto system standard.

Bug report title, courtesy Joshua Nozzi: https://twitter.com/jnozzi/status/234793396001189888