[fltk/fltk] Draw lines of equal width in scaled mode (#167) - Forums

In scaled mode lines are drawn with different widths to adapt for empty gaps when drawing adjacent lines.
This may look ugly when drawing grids. Is there a way to get lines of fixed widths?

#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Box.H>
#include <FL/fl_draw.H>

class LineBox : public Fl_Box
{
typedef Fl_Box Inherited;
public:
	LineBox(int x_, int y_, int w_, int h_, const char *l_ = 0) :
		Inherited( x_, y_, w_, h_, l_ ) {}
	void draw()
	{
		Inherited::draw();
		fl_color( FL_BLACK );
		fl_line_style( FL_SOLID, 1 );
		for ( int x = 0; x < this->w(); x += this->w() / 10 )
			fl_yxline( this->x() + x, this->y(), this->y() + this->h() );
		for ( int y = 0; y < this->h(); y += this->h() / 10 )
			fl_xyline( this->x(), this->y() + y, this->x() + this->w() );
		fl_line_style( 0 );
	}
};

int main( int argc_, char *argv_[] )
{
	static const int W = 200;
	static const int H = 200;
	Fl_Double_Window win( 0, 0, W, H );

	LineBox b( 0, 0, W, H );

	win.end();
	win.resizable(win);
	win.show();
	return Fl::run();
}

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