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PlotNeedleListener.h

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#ifndef Impala_Visualization_Plot_PlotNeedleListener_h
#define Impala_Visualization_Plot_PlotNeedleListener_h

namespace Impala {
namespace Visualization {
namespace Plot {

class PlotNeedle;

class PlotNeedleListener
{
public:
    virtual void PlotNeedleChanged(PlotNeedle *src, double nX, void* userData)
    {
    }
};

}//namespace Plot
}//namespace Visualization
}//namespace Impala
#endif

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