[PD-dev] Iem_gui objects in vanilla and zoom

[Fred Jan Kraan]

Hi,

While trying to understand the zoom function to apply it to other GUI 
objects, I studied the bng and tgl objects, and in the process came up 
with a solution that fixed both.

For the iem_gui objects only the basic generic GUI parameters are 
available in a struct; x & y position coordinates, height and width. All 
other GUI dimensions are not accessible outside the drawing functions. 
The only option to get a correct zoom is to apply the zoom-factor to all 
appropriate dimension values in all GUI functions.

At least for bng I have this working. With some more refactoring this 
could be applied without adding too much to the declared mess in the 
objects code.

Greetings,

Fred Jan