text: // Copyright (c) 2019 OPEN CASCADE SAS
  //
  // This file is part of the examples of the Open CASCADE Technology software library.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
  
  #ifndef _GlfwOcctWindow_Header
  #define _GlfwOcctWindow_Header
  
  #include <Aspect_DisplayConnection.hxx>
  #include <Aspect_RenderingContext.hxx>
  #include <Aspect_Window.hxx>
  #include <Graphic3d_Vec.hxx>
  #include <TCollection_AsciiString.hxx>
  
  struct GLFWwindow;
  
  //! GLFWwindow wrapper implementing Aspect_Window interface.
  class GlfwOcctWindow : public Aspect_Window
  {
    DEFINE_STANDARD_RTTI_INLINE(GlfwOcctWindow, Aspect_Window)
  public:
    //! Main constructor.
    GlfwOcctWindow (int theWidth, int theHeight, const TCollection_AsciiString& theTitle);
  
    //! Close the window.
    virtual ~GlfwOcctWindow() { Close(); }
  
    //! Close the window.
    void Close();
  
    //! Return X Display connection.
    const Handle(Aspect_DisplayConnection)& GetDisplay() const { return myDisplay; }
  
    //! Return GLFW window.
    GLFWwindow* getGlfwWindow() { return myGlfwWindow; }
  
    //! Return native OpenGL context.
    Aspect_RenderingContext NativeGlContext() const;
  
    //! Return cursor position.
    Graphic3d_Vec2i CursorPosition() const;
  
  public:
  
    //! Returns native Window handle
    virtual Aspect_Drawable NativeHandle() const Standard_OVERRIDE;
  
    //! Returns parent of native Window handle.
    virtual Aspect_Drawable NativeParentHandle() const Standard_OVERRIDE { return 0; }
  
    //! Applies the resizing to the window <me>
    virtual Aspect_TypeOfResize DoResize() Standard_OVERRIDE;
  
    //! Returns True if the window <me> is opened and False if the window is closed.
    virtual Standard_Boolean IsMapped() const Standard_OVERRIDE;
  
    //! Apply the mapping change to the window <me> and returns TRUE if the window is mapped at screen.
    virtual Standard_Boolean DoMapping() const Standard_OVERRIDE { return Standard_True; }
  
    //! Opens the window <me>.
    virtual void Map() const Standard_OVERRIDE;
  
    //! Closes the window <me>.
    virtual void Unmap() const Standard_OVERRIDE;
  
    virtual void Position (Standard_Integer& theX1, Standard_Integer& theY1,
                           Standard_Integer& theX2, Standard_Integer& theY2) const Standard_OVERRIDE
    {
      theX1 = myXLeft;
      theX2 = myXRight;
      theY1 = myYTop;
      theY2 = myYBottom;
    }
  
    //! Returns The Window RATIO equal to the physical WIDTH/HEIGHT dimensions.
    virtual Standard_Real Ratio() const Standard_OVERRIDE
    {
      return Standard_Real (myXRight - myXLeft) / Standard_Real (myYBottom - myYTop);
    }
  
    //! Return window size.
    virtual void Size (Standard_Integer& theWidth, Standard_Integer& theHeight) const Standard_OVERRIDE
    {
      theWidth  = myXRight - myXLeft;
      theHeight = myYBottom - myYTop;
    }
  
    virtual Aspect_FBConfig NativeFBConfig() const Standard_OVERRIDE { return NULL; }
  
  protected:
    Handle(Aspect_DisplayConnection) myDisplay;
    GLFWwindow*      myGlfwWindow;
    Standard_Integer myXLeft;
    Standard_Integer myYTop;
    Standard_Integer myXRight;
    Standard_Integer myYBottom;
  };
  
  #endif // _GlfwOcctWindow_Header
  