/*
Sketch Elements: Chemistry molecular diagram drawing tool.
(c) 2008 Dr. Alex M. Clark
Released as GNUware, under the Gnu Public License (GPL)
See www.gnu.org for details.
*/
package WIMSchem;
import java.util.*;
import java.text.*;
import java.lang.*;
import java.io.*;
/*
Controlling class for drawing a molecule in SVG format. This class performs a similar function to that of DrawMolecule, but outputs to
a text stream instead of a graphics context. Note that in this implementation of rendering, only the molecule is drawn, without
interactive effects.
*/
public class SVGMolecule implements ArrangeMeasurement
{
private SVGBuilder svg=new SVGBuilder();
private Molecule mol;
private double scale=20;
private ArrangeMolecule arrmol;
public SVGMolecule(Molecule mol)
{
this.mol=mol;
arrmol=new ArrangeMolecule(mol,this);
arrmol.setDevRounding(false);
}
public void draw()
{
arrmol.arrange();
for (int n=0;n<arrmol.numLines();n++)
{
int btype=arrmol.lineType(n);
double x1=arrmol.lineX1(n),y1=arrmol.lineY1(n),x2=arrmol.lineX2(n),y2=arrmol.lineY2(n);
double dx=x2-x1,dy=y2-y1;
if (btype==ArrangeMolecule.BLINE_NORMAL)
{
svg.drawLine(x1,y1,x2,y2,arrmol.lineCol(n),arrmol.lineSize(n));
}
else if (btype==ArrangeMolecule.BLINE_INCLINED)
{
double norm=
0.15*scale/
Math.
sqrt(dx
*dx+dy
*dy
); double ox=norm*dy,oy=-norm*dx;
svg.drawPoly(new double[]{x1,x2-ox,x2+ox},new double[]{y1,y2-oy,y2+oy},SVGBuilder.NOCOLOUR,0,arrmol.lineCol(n),true);
}
else if (btype==ArrangeMolecule.BLINE_DECLINED)
{
int nsteps=
(int)Math.
ceil(Math.
sqrt(dx
*dx+dy
*dy
)*0.15); double norm=
0.15*scale/
Math.
sqrt(dx
*dx+dy
*dy
); double ox=norm*dy,oy=-norm*dx;
for (int i=0;i<=nsteps+1;i++)
{
double cx=x1+i*dx/(nsteps+1),cy=y1+i*dy/(nsteps+1);
double ix=ox*i/(nsteps+1),iy=oy*i/(nsteps+1);
svg.drawLine(cx-ix,cy-iy,cx+ix,cy+iy,arrmol.lineCol(n),arrmol.lineSize(n));
}
}
else if (btype==ArrangeMolecule.BLINE_UNKNOWN)
{
int nsteps=
(int)Math.
ceil(Math.
sqrt(dx
*dx+dy
*dy
)*0.2); double norm=
0.2*scale/
Math.
sqrt(dx
*dx+dy
*dy
); double ox=norm*dy,oy=-norm*dx;
int sz=1+3*(nsteps+1);
double[] x=new double[sz],y=new double[sz];
boolean[] ctrl=new boolean[sz];
x[0]=x1; y[0]=y1; ctrl[0]=false;
for (int i=0,j=1;i<=nsteps;i++,j+=3)
{
double ax=x1+i*dx/(nsteps+1),ay=y1+i*dy/(nsteps+1);
double cx=x1+(i+1)*dx/(nsteps+1),cy=y1+(i+1)*dy/(nsteps+1);
double bx=(ax+cx)/2,by=(ay+cy)/2;
int sign=i%2==0 ? 1 : -1;
x[j]=ax; x[j+1]=bx+sign*ox; x[j+2]=cx;
y[j]=ay; y[j+1]=by+sign*oy; y[j+2]=cy;
ctrl[j]=true; ctrl[j+1]=true; ctrl[j+2]=false;
}
svg.drawCurve(x,y,ctrl,arrmol.lineCol(n),arrmol.lineSize(n),SVGBuilder.NOCOLOUR,false);
}
else if (btype==ArrangeMolecule.BLINE_DOTTED)
{
int nsteps=
(int)Math.
ceil(Math.
sqrt(dx
*dx+dy
*dy
)*0.10); float radius=(float)arrmol.lineSize(n);
for (int i=0;i<=nsteps+1;i++)
{
double cx=x1+i*dx/(nsteps+1),cy=y1+i*dy/(nsteps+1);
svg.drawOval(cx,cy,radius,radius,SVGBuilder.NOCOLOUR,0,arrmol.lineCol(n));
}
}
}
for (int n=0;n<arrmol.numPoints();n++)
{
String txt=arrmol.
pointText(n
); if (txt==null) continue; // is a point, so do not draw anything
int fstyle=arrmol.pointBold(n) ? SVGBuilder.TXTSTYLE_BOLD : SVGBuilder.TXTSTYLE_NORMAL;
svg.drawText(arrmol.pointCX(n),arrmol.pointCY(n)+arrmol.pointRH(n),txt,arrmol.pointFontSize(n),
arrmol.pointCol(n),fstyle,SVGBuilder.TXTALIGN_CENTRE);
}
}
// construct the SVG document, and output it to the given writer
{
int w=
(int)Math.
ceil(svg.
highX()-svg.
lowX()),h=
(int)Math.
ceil(svg.
highY()-svg.
lowY()); svg.build(out,w,h,-svg.lowX(),-svg.lowY(),1,1);
}
// convenient function for obtaining the SVG output as a string
{
return sw.toString();
}
// implementation of measurement metrics
public double scale() {return scale;}
public double angToX(double AX) {return AX*scale;}
public double angToY(double AY) {return -AY*scale;}
public double xToAng(double PX) {return PX*scale;}
public double yToAng(double PY) {return -PY*scale;}
public double[] measureText
(String str,
double fontSize
) {return svg.
measureText(str,fontSize,SVGBuilder.
TXTSTYLE_NORMAL);} }