io/boards/dgtalBoard2D-3-custom-points.cpp

This example shows you how to modify the style of each drawable elements. It is a matter of creating a custom style class which gives in its method setStyle the specific style parameters. Then, you attach this style to your drawable elements with an instance of CustomStyle outputted in the Board2D stream.

visualization of resulting export.

#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/io/Color.h"
#include "DGtal/io/boards/Board2D.h"
#include "DGtal/helpers/StdDefs.h"
 
using namespace std;
using namespace DGtal;
using namespace DGtal::Z2i;

struct MyDrawStyleCustomColor : public DrawableWithBoard2D
{
  Color myPenColor;
  Color myFillColor;
  MyDrawStyleCustomColor( const Color & penColor,
        const Color & fillColor )
    : myPenColor( penColor ), myFillColor( fillColor )
  {}
 
  virtual void setStyle( Board2D & aboard) const
  {
    aboard.setFillColor( myFillColor);
    aboard.setPenColor( myPenColor );
  }
};
 
int main()
{
  trace.beginBlock ( "Example dgtalBoard2D-3-custom-points" );
 
  Point p1( -3, -2 );
  Point p2( 7, 3 );
  Point p3( 0, 0 );
  Domain domain( p1, p2 );
 
  Color red( 255, 0, 0 );
  Color dred( 192, 0, 0 );
  Color green( 0, 255, 0 );
  Color dgreen( 0, 192, 0 );
  Color blue( 0, 0, 255 );
  Color dblue( 0, 0, 192 );
 
  Board2D board;
  board << domain
  << CustomStyle( p1.className(), new MyDrawStyleCustomColor( red, dred ) )
  << p1
  << CustomStyle( p2.className(), new MyDrawStyleCustomColor( green, dgreen ) )
  << p2
  << CustomStyle( p3.className(), new MyDrawStyleCustomColor( blue, dblue ) )
  << p3;
  board.saveSVG("dgtalBoard2D-3-custom-points.svg");
  board.saveEPS("dgtalBoard2D-3-custom-points.eps");
  board.saveTikZ("dgtalBoard2D-3-custom-points.tikz");
 
#ifdef DGTAL_WITH_CAIRO
  board.saveCairo("dgtalBoard2D-3-custom-points-cairo.pdf", Board2D::CairoPDF);
  board.saveCairo("dgtalBoard2D-3-custom-points-cairo.png", Board2D::CairoPNG);
  board.saveCairo("dgtalBoard2D-3-custom-points-cairo.ps", Board2D::CairoPS);
  board.saveCairo("dgtalBoard2D-3-custom-points-cairo.svg", Board2D::CairoSVG);
#endif
 
  trace.endBlock();
  return 0;
}
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