Re: [fltk/fltk] FLTK 1.3.6 doesn't handle fullscreen on macOS (Issue #287) - Forums

I have managed to reproduce the issue on MacOS 12.0.1 using editor.cxx (on branch-1.3) with the following patch applied:

diff --git a/test/editor.cxx b/test/editor.cxx
index c9aa6a4bf..740ea86eb 100644
--- a/test/editor.cxx
+++ b/test/editor.cxx
@@ -614,6 +614,14 @@ void delete_cb(Fl_Widget*, void*) {
   textbuf->remove_selection();
 }

+void fullscreen_cb(Fl_Widget*, void* v) {
+    EditorWindow* e = (EditorWindow*)v;
+    if (e->fullscreen_active())
+        e->fullscreen_off();
+    else
+        e->fullscreen();
+}
+
 void linenumbers_cb(Fl_Widget *w, void* v) {
   EditorWindow* e = (EditorWindow*)v;
   Fl_Menu_Bar* m = (Fl_Menu_Bar*)w;
@@ -876,6 +884,7 @@ Fl_Menu_Item menuitems[] = {
     { "&Copy",            FL_COMMAND + 'c', (Fl_Callback *)copy_cb },
     { "&Paste",           FL_COMMAND + 'v', (Fl_Callback *)paste_cb },
     { "&Delete",          0, (Fl_Callback *)delete_cb },
+    { "&Full Screen",     FL_COMMAND + 'n', (Fl_Callback *)fullscreen_cb },
     { "Preferences",      0, 0, 0, FL_SUBMENU },
       { "Line Numbers",   FL_COMMAND + 'l', (Fl_Callback *)linenumbers_cb, 0, FL_MENU_TOGGLE },
       { "Word Wrap",      0,                (Fl_Callback *)wordwrap_cb, 0, FL_MENU_TOGGLE },
@@ -964,7 +973,8 @@ int main(int argc, char **argv) {
   fl_open_callback(cb);

   Fl_Window* window = new_view();
-
+  window->resize(0, 0, 1920, 1200);
+  window->fullscreen();
   window->show(1, argv);
 #ifndef __APPLE__
   if (argc > 1) load_file(argv[1], -1);

Please note that you have to adjust the resize call at the end to the resolution of your primary monitor.

After this you are expected to see similar symptoms as shown in the screenshots in TigerVNC/tigervnc#1361.

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