root gui bug in v1_12_00
Larsoft recently updated from art v1_10_00b to v1_12_00 (larsoft v02_06_02 to v03_00_00). This version update also entailed updates of several dependent products, including root v5_34_18d to v5_34_21 and gcc v4_8_2 to v4_9_1 (c++11 to c++14). Since this update, the larsoft event display ortho3D view is partially broken. I traced the problem to certain mouse events (specifically kButton1Motion events) being sent to the wrong TPad (i.e. not the pad that the mouse is located in).
This problem seems like an issue with the underlying root (larsoft event display code did not change between these versions). Problem could be either the compiler change or the root version change.
Any help with this problem will be appreciated.