Bug #2519

Mis à jour par Sebastien Jacquot il y a plus de 6 ans

The Jfreechart library seems to not manage correctly the scale using the mac os x trackpad.

h3. Steps to reproduce

* create a CA
* scroll up or down with the trackpad
=> the zoom that occurs is in both cases a zoom out

NOTE: can not be reproduced with a mouse on Mac os X 10.14 (SJ)
NOTE: can not be reproduced with a mouse on Mac os X 10.???? (MD)
NOTE: can be reproduced with trackpad on Mac os X 10.???? (MD)
NOTE: seems to occur also with mouse on 10.11 (JCD)

NOTE: can be reproduce with trackpad without TXM, running the basic jfreechart demos jar.

h3. First indications

* I suspect Java to always receive 0 in MouseWheelEvent on OS X as number or rotations instead of positive or negative numbers defining the direction or the rotation
* It seems the bug does not occur in 0.7.9

* * we do not changed change the JRE version between 0.7.9 et 0.8.0 so
* maybe an OS X update has introduced this behavior

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