Merge remote-tracking branch 'refs/remotes/origin/master'

CHANGES.txt

@@ -18,6 +18,8 @@ Changes in FLTK 1.4.0					Released: ??? ?? 2019
   New Features and Extensions
 
   - (add new items here)
+  - Fix Fl::add_timeout() under Linux (STR 3516).
+  - Fix early timeouts in Fl_Clock seen in some environments (STR 3516).
   - Fl_Printer::begin_job() uses by default the Gnome print dialog on the X11
     platform when the GTK library is available at run-time. That can be turned off
     with Fl::option(OPTION_PRINTER_USES_GTK, false).

FL/Fl_Tree.H

@@ -278,7 +278,8 @@ enum Fl_Tree_Reason {
   FL_TREE_REASON_NONE=0,	///< unknown reason
   FL_TREE_REASON_SELECTED,	///< an item was selected
   FL_TREE_REASON_DESELECTED,	///< an item was de-selected
-  FL_TREE_REASON_RESELECTED,	///< an item was re-selected (e.g. double-clicked)
+  FL_TREE_REASON_RESELECTED,	///< an item was re-selected (double-clicked).
+				///< See ::Fl_Tree_Item_Reselect_Mode to enable this.
   FL_TREE_REASON_OPENED,	///< an item was opened
   FL_TREE_REASON_CLOSED,	///< an item was closed
   FL_TREE_REASON_DRAGGED	///< an item was dragged into a new place

src/Fl_Clock.cxx

@@ -212,11 +212,16 @@ static void tick(void *v) {
   time_t sec;
   int usec;
   Fl::system_driver()->gettime(&sec, &usec);
+  double delta = (1000000 - usec)/1000000.; // time till next second
+  // if current time is just before full second, show that full second
+  // and wait one more second (STR 3516)
+  if (delta < 0.1) {
+    delta += 1.0;
+    sec++;
+  }
   ((Fl_Clock*)v)->value((ulong)sec);
 
-  // schedule timer event slightly later than the next second (+25 ms)
-  // to prevent multiple timer events if triggered too early (STR 3516)
-  Fl::add_timeout((1025000 - usec)/1000000., tick, v);
+  Fl::add_timeout(delta, tick, v);
 }
 
 int Fl_Clock::handle(int event) {

src/Fl_Pack.cxx

@@ -135,6 +135,8 @@ void Fl_Pack::draw() {
   th += Fl::box_dh(box()); if (th <= 0) th = 1;
   if (tw != w() || th != h()) {
     Fl_Widget::resize(x(),y(),tw,th);
+    Fl_Group *parent = this->parent();
+    if (parent) parent->init_sizes();
     d = FL_DAMAGE_ALL;
   }
   if (d&FL_DAMAGE_ALL) {

src/drivers/X11/Fl_X11_Screen_Driver.cxx

@@ -635,6 +635,7 @@ const char *Fl_X11_Screen_Driver::get_system_scheme()
 
 void Fl_X11_Screen_Driver::add_timeout(double time, Fl_Timeout_Handler cb, void *argp) {
   elapse_timeouts();
+  missed_timeout_by = 0;
   repeat_timeout(time, cb, argp);
 }