MolDraw2DQt.H

//
// file MolDraw2DQt.H
// David Cosgrove
// AstraZeneca
// 19th June 2014
//
// This is a concrete class derived from MolDraw2D that uses RDKit to draw a
// molecule into a QPainter.

#ifndef MOLDRAW2DQT_H
#define MOLDRAW2DQT_H

#include "MolDraw2D.H"

class QPainter;
class QString;

// ****************************************************************************

namespace RDKit {

class MolDraw2DQt : public MolDraw2D {

public :

  MolDraw2DQt( int width , int height , QPainter &qp );

  // set font size in molecule coordinate units. That's probably Angstrom for
  // RDKit. It will turned into drawing units using scale_, which might be
  // changed as a result, to make sure things still appear in the window.
  void setFontSize( float new_size );
  void setColour( const DrawColour &col );

private :

  QPainter &qp_;

  void drawLine( const std::pair<float,float> &cds1 ,
                 const std::pair<float,float> &cds2 );
  void drawChar( char c , const std::pair<float,float> &cds );
  void drawTriangle( const std::pair<float,float> &cds1 ,
                     const std::pair<float,float> &cds2 ,
                     const std::pair<float,float> &cds3 );
  void clearDrawing();

  // using the current scale, work out the size of the label in molecule coordinates
  void getStringSize( const std::string &label , float &label_width ,
                      float &label_height ) const;

};

}
#endif // MOLDRAW2DQT_H