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[STR New]

Link: https://www.fltk.org/str.php?L2639
Version: 1.4-feature


I tested Fl_Flex in the given context by modifying the first demo program
https://www.fltk.org/strfiles/2639/rsz.cc and replacing Fl_Pack with
Fl_Flex. Fl_Flex needs some layout hints if you want only one flexible
(i.e. resizable) widget (usually all children are flexible). See uploaded
file https://www.fltk.org/strfiles/2639/str2639_rsz_flex.cxx . Setting the
layout is done like this:

  // Fl_Flex p1: set layout and end group

  p1->fixed(g1, 30);
  p1->fixed(g2, 30);
  p1->fixed(b1, 30);
  p1->fixed(b2, 30);
  p1->end();
  // p1->resizable(g3); // would be ignored by Fl_Flex

I also added a size_range():

  window->size_range(200, 60);

Using 60 lets you resize the window to a minimal height of 60 which hides
all groups behind the buttons, but resizing works as designed. Hiding and
showing the group g2 works as expected. :-)

IMHO Fl_Flex is superior to Fl_Pack in many ways and can replace Fl_Pack in
cases where Fl_Pack doesn't work well by design. An even more flexible
widget Fl_Grid will be added to FLTK 1.4.0 soon.


Link: https://www.fltk.org/str.php?L2639
Version: 1.4-feature