From a9e2a78bb0d6e243d904f1b0923559284cbe9e79 Mon Sep 17 00:00:00 2001 From: Manolo Gouy Date: Thu, 9 Aug 2018 11:51:38 +0000 Subject: [PATCH] Improve the documentation of scaling factor-related operations. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@13013 ea41ed52-d2ee-0310-a9c1-e6b18d33e121 --- FL/Fl.H | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/FL/Fl.H b/FL/Fl.H index 1075c3831..1c482d73a 100644 --- a/FL/Fl.H +++ b/FL/Fl.H @@ -993,13 +993,18 @@ int main() { /** \defgroup fl_screen Screen functions - fl global screen functions declared in . + Fl global screen functions declared in . 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. @{ */