8508b3dba4
A widget's style (font) is only set after the widget has been packed and inherits relevant information from the top-level window. `set_size_request_to_display_given_text()` produces incorrect results when it is called for widgets without a top-level (here ARDOUR_UI::setup_windows() _main_window.add(), changes the font from "Sans 11" to "Sans 9" for ArdourDropdowns). `set_size_request_to_display_given_text()` must subscribe to `signal_style_changed()`, however in case of ArdourButton UI-scaling of elements also needs to be taken into account. It is preferable to allow for multiple sizing-texts directly.
Please see the Ardour web site at https://ardour.org/ for all documentation..
For information on building ardour:
https://ardour.org/development.html