diff options
| -rw-r--r-- | FL/Fl.H | 15 |
1 files changed, 10 insertions, 5 deletions
@@ -993,13 +993,18 @@ int main() { /** \defgroup fl_screen Screen functions - fl global screen functions declared in <FL/Fl.H>. + Fl global screen functions declared in <FL/Fl.H>. FLTK supports high-DPI screens using a screen scaling factor. - The scaling factor value can be changed by typing ctrl-/+/-/0/ - (cmd-/+/-/0/ under MacOS). FLTK sends the FL_ZOOM_EVENT when the - factor value is changed, to which a callback can be associated with Fl::add_handler(). + The scaling factor is initialized by the library to a value + based on information obtained from the OS. If this initial value + is not satisfactory, the FLTK_SCALING_FACTOR environment variable + can be set to a value FLTK will use as initial scaling factor. + The scaling factor value can be further changed at runtime + by typing ctrl-/+/-/0/ (cmd-/+/-/0/ under MacOS). FLTK sends the + \ref FL_ZOOM_EVENT when the factor value is changed, to which a + callback can be associated with Fl::add_handler(). By default, FLTK also displays the new scaling factor value in a yellow, transient window. - This can be changed with Fl::option(OPTION_SHOW_SCALING, 0). + This can be changed with option Fl::OPTION_SHOW_SCALING. The scaling factor value is programmatically get and set with the Fl::screen_scale() functions. @{ */ |