Adding `FL_BEFORE_MENU` event to classes derived from `Fl_Menu_`

2 files changed, 30 insertions, 3 deletions

diff --git a/test/color_chooser.cxx b/test/color_chooser.cxx
index a9a7a5ca1..f5c9827cc 100644
--- a/test/color_chooser.cxx
+++ b/test/color_chooser.cxx
@@ -90,7 +90,7 @@ public:
   Image_Box(int x, int y, int w, int h, const char *label = nullptr)
   : Fl_Box(x, y, w, h, label) { }
   int handle(int event) {
-    if (event == FL_TOOLTIP_EVENT) {
+    if (event == FL_BEFORE_TOOLTIP) {
       const char *color_name_lut[] = { "blue", "green", "black", "red" };
       int quadrant = (Fl::event_x() < x()+w()/2) + 2*(Fl::event_y() < y()+h()/2);
       char buf[80];
diff --git a/test/menubar.cxx b/test/menubar.cxx
index a5ccfc234..2aeec991c 100644
--- a/test/menubar.cxx
+++ b/test/menubar.cxx
@@ -210,7 +210,7 @@ void menu_location_cb(Fl_Widget* w, void* data)
   if (((Fl_Choice*)w)->value() == 1) { // switch to system menu bar
     menubar->hide();
     const Fl_Menu_Item *menu = menubar->menu();
-    smenubar = new  Fl_Sys_Menu_Bar(0,0,0,30);
+    smenubar = new Fl_Sys_Menu_Bar(0,0,0,30);
     smenubar->menu(menu);
     smenubar->callback(test_cb);
     }
@@ -236,6 +236,30 @@ void about_cb(Fl_Widget*, void*) {
   fl_message("The menubar test app.");
 }
 
+class Dynamic_Choice: public Fl_Choice {
+public:
+  Dynamic_Choice(int x, int y, int w, int h, const char *label=nullptr)
+  : Fl_Choice(x, y, w, h, label) { }
+  int handle(int event) {
+    static int flip_flop = 0;
+    if (event == FL_BEFORE_MENU) {
+      // The following line is legal because we used `copy()` to create a
+      // writable copy of the menu array when creating this Choice.
+      Fl_Menu_Item *mi = const_cast<Fl_Menu_Item*>(menu());
+      if (flip_flop == 1) {
+        mi[7].flags |= FL_MENU_INACTIVE;
+        mi[8].flags &= ~FL_MENU_INACTIVE;
+        flip_flop = 0;
+      } else {
+        mi[7].flags &= ~FL_MENU_INACTIVE;
+        mi[8].flags |= FL_MENU_INACTIVE;
+        flip_flop = 1;
+      }
+    }
+    return Fl_Choice::handle(event);
+  }
+};
+
 int main(int argc, char **argv) {
   for (int i=0; i<99; i++) {
     char buf[100];
@@ -256,7 +280,10 @@ int main(int argc, char **argv) {
   mb1.tooltip("this is a menu button");
   mb1.callback(test_cb);
   menus[1] = &mb1;
-  Fl_Choice ch(300,100,80,25,"&choice:"); ch.menu(pulldown);
+  Dynamic_Choice ch(300,100,80,25,"&choice:");
+  ch.copy(pulldown);
+  ch.add("Flip");
+  ch.add("Flop");
   ch.tooltip("this is a choice menu");
   ch.callback(test_cb);
   menus[2] = &ch;