Placing float windows in the middle of its parent about herbstluftwm

[t-wissmann]

Implementing it is not so easy as one may think. You need to add a Client* transientFor = nullptr; attribute in client.h. Then, in Client::init_from_X(), you need to read the WM_TRANSIENT_FOR property and save the result in transientFor. Then, in the implementation of parentcenter, one can place it in the center of transientFor->last_size_. (the above description is just a sketch)

[t-wissmann]

Hi, I think it is only possible by implementing it directly in hlwm's source code (something like floatplacement=parentcenter)

[kriansa]

I see. I'll try to take a stab at it this weekend and see how it goes. I was just reading the code and it doesn't seem complicated, although I'm not experienced with X or Xlib. I was looking at client.cpp class and I couldn't find a way to easily get the "parent window" (if that concept even exists), would you help me pointing out where should I look to get that?

Edit: There's a reference for parent_frame. For tiling windows that will suffice, but floating ones would have no frames, right?