Fix for "Exception, no window attached to view" when cold opening a file on Mac

Author: mgubi

packages/macos/TeXmacs.xcodeproj/project.pbxproj

@@ -4126,6 +4126,7 @@
 			isa = PBXGroup;
 			children = (
 				9C0B48A410A8CC100097A335 /* NOTES */,
+				9C0B48BE10A8CC100097A335 /* TODO */,
 				4901F0E4128B4F7200CC54C6 /* qt_printer_widget.cpp */,
 				9C225A63128B5EB00039258C /* qt_chooser_widget.cpp */,
 				9C088F7312B1BAD000A18E04 /* qt_color_picker_widget.cpp */,
@@ -4184,7 +4185,6 @@
 				9C0B48BB10A8CC100097A335 /* QTMWidget.hpp */,
 				9C0B48BC10A8CC100097A335 /* QTMWindow.cpp */,
 				9C0B48BD10A8CC100097A335 /* QTMWindow.hpp */,
-				9C0B48BE10A8CC100097A335 /* TODO */,
 			);
 			path = Qt;
 			sourceTree = "<group>";

src/Plugins/Qt/QTMGuiHelper.cpp

@@ -40,7 +40,8 @@ QTMGuiHelper::eventFilter (QObject *obj, QEvent *event) {
     const char* s = openEvent->file().toUtf8().constData();
       //qDebug ("File Open Event %s", s);
     const char *win= new_window_flag? ":new-window": ":current-window";
-    call ("load-buffer", object (url_system (s)), eval (win));
+    exec_delayed (scheme_cmd (list_object (symbol_object ("load-buffer"),
+                              object (url_system (s)), eval (win))));
     new_window_flag= true;
     return true;
   } else {

src/Plugins/Qt/qt_gui.cpp

@@ -936,6 +936,7 @@ qt_gui_rep::refresh_language() {
  */
 void
 qt_gui_rep::show_help_balloon (widget wid, SI x, SI y) {
+  cout << "*"; cout.flush();
   if (popup_wid_time > 0) return;
 
   _popup_wid = popup_window_widget (wid, "Balloon");