Only enable the preview button if we can actually preview something.

[nageru] / futatabi / mainwindow.h

diff --git a/futatabi/mainwindow.h b/futatabi/mainwindow.h
index 8d286117e6a95d8f2998109ae656cd2df1d5bcca..d7e037c37ee7205a6c177d22509ce25f85fa990b 100644 (file)
--- a/futatabi/mainwindow.h
+++ b/futatabi/mainwindow.h
@@ -138,6 +138,7 @@ private:
        void padding_toggled(double seconds, bool checked);
 
        void highlight_camera_input(int stream_idx);
+       void enable_or_disable_preview_button();
 
        template<class Model>
        void replace_model(QTableView *view, Model **model, Model *new_model);