Johann Sorel reported that using XFCE a NEWT Window changes its previous position when resizing it programmatically via setSize(..).
Installed - xfce 4.10.1 - xfce4-goodies 4.10 which includes: - xfdesktop4 4.10.2-3 - .. and a bunch of stuff .. using all default settings on Debian 8, using Mesa3D software rendering. +++ This bug could not be reproduced via: TestGearsES2NEWT w/ command line args: -manual -time 1000000 -rwidth 500 -rheight 500 -x 200 -y 200 -manual -time 1000000 -rwidth 500 -rheight 500 -undecorated -x 200 -y 200 -manual -time 1000000 -rwidth 500 -rheight 500 -manual -time 1000000 -rwidth 500 -rheight 500 -undecorated XFCE only changed the window position, if it doesn't fit on the screen anymore from its current position. Closing for now, please reopen w/ a details reproducible description.
Created attachment 761 [details] Minimalist test application In this tiny application the program catchs the mouse events and resize the frame. The frame 'jumps' everywhere on the screen at each resize.