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Clarify doc about how FLTK_SCALING_FACTOR operates.

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ManoloFLTK 2020-11-03 08:13:33 +01:00
parent 98a4e49204
commit 5132bb6a06
1 changed files with 5 additions and 5 deletions
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@ -1039,14 +1039,14 @@ int main() {
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
can be set to a value FLTK will multiply to the OS-given value.
The 2 variants of functions Fl::screen_scale() allow to programmatically get and set
scaling factor values. 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.
By default, FLTK displays the new scaling factor value in a yellow, transient window.
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.
@{ */
static int x(); // via screen driver
static int y(); // via screen driver