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-rw-r--r--FL/Fl_Window_Driver.H3
1 files changed, 3 insertions, 0 deletions
diff --git a/FL/Fl_Window_Driver.H b/FL/Fl_Window_Driver.H
index dea792669..540b6971f 100644
--- a/FL/Fl_Window_Driver.H
+++ b/FL/Fl_Window_Driver.H
@@ -40,6 +40,9 @@ public:
static Fl_Window_Driver *newWindowDriver(Fl_Window *);
virtual void take_focus() { }
+ virtual int double_flush(int eraseoverlay);
+ virtual void destroy_double_buffer();
+ void draw() {w->draw();}
};