Re: [fltk/fltk] Fl::focus(Fl_Widget*) should be independent of Fl_Widget::visible_focus() (Issue #366) - Forums

Do we need something that prevents focus being transmitted to a widget, knowing that
the widget's handle method returning 0 to the FL_FOCUS event does that already ?

@ManoloFLTK Here's another aspect: the following minimal patch makes the sudoku test program skip readonly cells when the user presses TAB or an arrow key.

diff --git a/test/sudoku.cxx b/test/sudoku.cxx
index 28437fbd8..3edac113d 100644
--- a/test/sudoku.cxx
+++ b/test/sudoku.cxx
@@ -142,7 +142,7 @@ class SudokuCell : public Fl_Widget {
                 SudokuCell(int X, int Y, int W, int H);
   void          draw();
   int           handle(int event);
-  void          readonly(bool r) { readonly_ = r; redraw(); }
+  void          readonly(bool r) { readonly_ = r; redraw(); visible_focus(!r); }
   bool          readonly() const { return readonly_; }
   void          test_value(int v, int n) { test_value_[n] = v; redraw(); }
   int           test_value(int n) const { return test_value_[n]; }

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