This week I worked mostly on the GUI and it is finished. May be not complete, but it works and includes most of the stuff I need to build game configuration menus. Right now it can be managed by keyboard and mouse. Default GUI style is minimalistic but can be changed easily just extending the TmngDialogStyle class and assigning such object to the dialog property.

This is how a small dialog looks in the map editor:
170318_1824.png