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-rw-r--r--FL/Fl_System_Driver.H2
1 files changed, 2 insertions, 0 deletions
diff --git a/FL/Fl_System_Driver.H b/FL/Fl_System_Driver.H
index 89d18a8a2..e9f0f38c6 100644
--- a/FL/Fl_System_Driver.H
+++ b/FL/Fl_System_Driver.H
@@ -208,6 +208,8 @@ public:
virtual void add_fd(int fd, Fl_FD_Handler cb, void* = 0);
virtual void remove_fd(int, int when);
virtual void remove_fd(int);
+ // the default implementation of open_callback() may be enough
+ virtual void open_callback(void (*)(const char *));
};
#endif // FL_SYSTEM_DRIVER_H