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 // Created on: 2015-11-23
 // Created by: Anastasia BORISOVA
 // Copyright (c) 2015 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _AIS_RubberBand_HeaderFile
 #define _AIS_RubberBand_HeaderFile
 
 #include <AIS_InteractiveObject.hxx>
 #include <Graphic3d_ArrayOfPolylines.hxx>
 #include <Graphic3d_ArrayOfTriangles.hxx>
 #include <Graphic3d_Vec2.hxx>
 #include <NCollection_Sequence.hxx>
 
 DEFINE_STANDARD_HANDLE(AIS_RubberBand, AIS_InteractiveObject)
 
 //! Presentation for drawing rubber band selection.
 //! It supports rectangle and polygonal selection.
 //! It is constructed in 2d overlay.
 //! Default configuration is built without filling.
 //! For rectangle selection use SetRectangle() method.
 //! For polygonal selection use AddPoint() and GetPoints() methods.
 class AIS_RubberBand : public AIS_InteractiveObject
 {
 public:
 
   DEFINE_STANDARD_RTTIEXT(AIS_RubberBand, AIS_InteractiveObject)
 
   //! Constructs rubber band with default configuration: empty filling and white solid lines.
   //! @warning It binds this object with Graphic3d_ZLayerId_TopOSD layer.
   Standard_EXPORT AIS_RubberBand();
 
   //! Consructs the rubber band with empty filling and defined line style.
   //! @param theLineColor [in] color of rubber band lines
   //! @param theType [in] type of rubber band lines
   //! @param theLineWidth [in] width of rubber band line. By default it is 1.
   //! @warning It binds this object with Graphic3d_ZLayerId_TopOSD layer.
   Standard_EXPORT AIS_RubberBand (const Quantity_Color& theLineColor,
                                   const Aspect_TypeOfLine theType,
                                   const Standard_Real theLineWidth = 1.0,
                                   const Standard_Boolean theIsPolygonClosed = Standard_True);
 
   //! Constructs the rubber band with defined filling and line parameters.
   //! @param theLineColor [in] color of rubber band lines
   //! @param theType [in] type of rubber band lines
   //! @param theFillColor [in] color of rubber band filling
   //! @param theTransparency [in] transparency of the filling. 0 is for opaque filling. By default it is transparent.
   //! @param theLineWidth [in] width of rubber band line. By default it is 1.
   //! @warning It binds this object with Graphic3d_ZLayerId_TopOSD layer.
   Standard_EXPORT AIS_RubberBand (const Quantity_Color& theLineColor,
                                   const Aspect_TypeOfLine theType,
                                   const Quantity_Color theFillColor,
                                   const Standard_Real theTransparency = 1.0,
                                   const Standard_Real theLineWidth = 1.0,
                                   const Standard_Boolean theIsPolygonClosed = Standard_True);
 
   Standard_EXPORT virtual ~AIS_RubberBand();
 
   //! Sets rectangle bounds.
   Standard_EXPORT void SetRectangle (const Standard_Integer theMinX, const Standard_Integer theMinY,
                                      const Standard_Integer theMaxX, const Standard_Integer theMaxY);
 
   //! Adds last point to the list of points. They are used to build polygon for rubber band.
   //! @sa RemoveLastPoint(), GetPoints()
   Standard_EXPORT void AddPoint (const Graphic3d_Vec2i& thePoint);
 
   //! Remove last point from the list of points for the rubber band polygon.
   //! @sa AddPoint(), GetPoints()
   Standard_EXPORT void RemoveLastPoint();
 
   //! @return points for the rubber band polygon.
   Standard_EXPORT const NCollection_Sequence<Graphic3d_Vec2i>& Points() const;
 
   //! Remove all points for the rubber band polygon.
   void ClearPoints() { myPoints.Clear(); }
 
   //! @return the Color attributes.
   Standard_EXPORT Quantity_Color LineColor() const;
 
   //! Sets color of lines for rubber band presentation.
   Standard_EXPORT void SetLineColor (const Quantity_Color& theColor);
 
   //! @return the color of rubber band filling.
   Standard_EXPORT Quantity_Color FillColor() const;
 
   //! Sets color of rubber band filling.
   Standard_EXPORT void SetFillColor (const Quantity_Color& theColor);
 
   //! Sets width of line for rubber band presentation.
   Standard_EXPORT void SetLineWidth (const Standard_Real theWidth) const;
 
   //! @return width of lines.
   Standard_EXPORT Standard_Real LineWidth() const;
 
   //! Sets type of line for rubber band presentation.
   Standard_EXPORT void SetLineType (const Aspect_TypeOfLine theType);
 
   //! @return type of lines.
   Standard_EXPORT Aspect_TypeOfLine LineType() const;
 
   //! Sets fill transparency.
   //! @param theValue [in] the transparency value. 1.0 is for transparent background
   Standard_EXPORT void SetFillTransparency (const Standard_Real theValue) const;
 
   //! @return fill transparency.
   Standard_EXPORT Standard_Real FillTransparency() const;
 
   //! Enable or disable filling of rubber band.
   Standard_EXPORT void SetFilling (const Standard_Boolean theIsFilling);
 
   //! Enable filling of rubber band with defined parameters.
   //! @param theColor [in] color of filling
   //! @param theTransparency [in] transparency of the filling. 0 is for opaque filling.
   Standard_EXPORT void SetFilling (const Quantity_Color theColor, const Standard_Real theTransparency);
 
   //! @return true if filling of rubber band is enabled.
   Standard_EXPORT Standard_Boolean IsFilling() const;
 
   //! @return true if automatic closing of rubber band is enabled.
   Standard_EXPORT Standard_Boolean IsPolygonClosed() const;
 
   //! Automatically create an additional line connecting the first and 
   //! the last screen points to close the boundary polyline
   Standard_EXPORT void SetPolygonClosed(Standard_Boolean theIsPolygonClosed);
 
 protected:
 
   //! Returns true if the interactive object accepts the display mode.
   Standard_Boolean AcceptDisplayMode (const Standard_Integer theMode) const Standard_OVERRIDE
   {
     return theMode == 0;
   }
 
   //! Computes presentation of rubber band.
   Standard_EXPORT virtual void Compute (const Handle(PrsMgr_PresentationManager)& thePrsMgr,
                                         const Handle(Prs3d_Presentation)& thePrs,
                                         const Standard_Integer theMode) Standard_OVERRIDE;
 
   //! Does not fill selection primitives for rubber band.
   virtual void ComputeSelection (const Handle(SelectMgr_Selection)& /*aSelection*/,
                                  const Standard_Integer /*aMode*/) Standard_OVERRIDE { };
 
   //! Fills triangles primitive array for rubber band filling.
   //! It uses Delaunay triangulation.
   //! @return true if array of triangles is successfully filled.
   Standard_EXPORT Standard_Boolean fillTriangles();
 
 protected:
 
   NCollection_Sequence<Graphic3d_Vec2i> myPoints; //!< Array of screen points
 
   Handle(Graphic3d_ArrayOfTriangles) myTriangles; //!< Triangles for rubber band filling
   Handle(Graphic3d_ArrayOfPolylines) myBorders; //!< Polylines for rubber band borders
 
   Standard_Boolean                   myIsPolygonClosed; //!< automatic closing of rubber-band flag
 };
 #endif

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