+ /// Return a widget value point by the selection and the viewer position
+ /// The default realization returns false
+ /// \param thePrs the presentation
+ /// \param theViewer a viewer to have the viewer the eye position
+ /// \param theX the horizontal coordinate
+ /// \param theY the vertical coordinate
+ /// \return true if the point exits in the selection
+ virtual bool getViewerPoint(ModuleBase_ViewerPrs thePrs,
+ ModuleBase_IViewer* theViewer,
+ double& theX, double& theY);