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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 7246 | schaersvoo | 1 | /* |
| 2 | Sketch Elements: Chemistry molecular diagram drawing tool. |
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| 3 | |||
| 4 | (c) 2008 Dr. Alex M. Clark |
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| 5 | |||
| 6 | Released as GNUware, under the Gnu Public License (GPL) |
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| 7 | |||
| 8 | See www.gnu.org for details. |
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| 9 | */ |
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| 10 | |||
| 11 | package WIMSchem; |
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| 12 | |||
| 13 | import java.util.*; |
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| 14 | import java.text.*; |
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| 15 | import java.lang.*; |
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| 16 | import java.io.*; |
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| 17 | |||
| 18 | /* |
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| 19 | Controlling class for drawing a molecule in SVG format. This class performs a similar function to that of DrawMolecule, but outputs to |
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| 20 | a text stream instead of a graphics context. Note that in this implementation of rendering, only the molecule is drawn, without |
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| 21 | interactive effects. |
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| 22 | */ |
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| 23 | |||
| 24 | public class SVGMolecule implements ArrangeMeasurement |
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| 25 | { |
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| 26 | private SVGBuilder svg=new SVGBuilder(); |
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| 27 | |||
| 28 | private Molecule mol; |
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| 29 | private double scale=20; |
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| 30 | |||
| 31 | private ArrangeMolecule arrmol; |
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| 32 | |||
| 33 | public SVGMolecule(Molecule mol) |
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| 34 | { |
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| 35 | this.mol=mol; |
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| 36 | |||
| 37 | arrmol=new ArrangeMolecule(mol,this); |
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| 38 | arrmol.setDevRounding(false); |
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| 39 | } |
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| 40 | |||
| 41 | public void draw() |
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| 42 | { |
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| 43 | arrmol.arrange(); |
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| 44 | |||
| 45 | for (int n=0;n<arrmol.numLines();n++) |
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| 46 | { |
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| 47 | int btype=arrmol.lineType(n); |
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| 48 | double x1=arrmol.lineX1(n),y1=arrmol.lineY1(n),x2=arrmol.lineX2(n),y2=arrmol.lineY2(n); |
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| 49 | double dx=x2-x1,dy=y2-y1; |
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| 50 | if (btype==ArrangeMolecule.BLINE_NORMAL) |
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| 51 | { |
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| 52 | svg.drawLine(x1,y1,x2,y2,arrmol.lineCol(n),arrmol.lineSize(n)); |
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| 53 | } |
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| 54 | else if (btype==ArrangeMolecule.BLINE_INCLINED) |
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| 55 | { |
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| 56 | double norm=0.15*scale/Math.sqrt(dx*dx+dy*dy); |
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| 57 | double ox=norm*dy,oy=-norm*dx; |
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| 58 | svg.drawPoly(new double[]{x1,x2-ox,x2+ox},new double[]{y1,y2-oy,y2+oy},SVGBuilder.NOCOLOUR,0,arrmol.lineCol(n),true); |
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| 59 | } |
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| 60 | else if (btype==ArrangeMolecule.BLINE_DECLINED) |
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| 61 | { |
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| 62 | int nsteps=(int)Math.ceil(Math.sqrt(dx*dx+dy*dy)*0.15); |
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| 63 | double norm=0.15*scale/Math.sqrt(dx*dx+dy*dy); |
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| 64 | double ox=norm*dy,oy=-norm*dx; |
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| 65 | for (int i=0;i<=nsteps+1;i++) |
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| 66 | { |
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| 67 | double cx=x1+i*dx/(nsteps+1),cy=y1+i*dy/(nsteps+1); |
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| 68 | double ix=ox*i/(nsteps+1),iy=oy*i/(nsteps+1); |
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| 69 | svg.drawLine(cx-ix,cy-iy,cx+ix,cy+iy,arrmol.lineCol(n),arrmol.lineSize(n)); |
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| 70 | } |
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| 71 | } |
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| 72 | else if (btype==ArrangeMolecule.BLINE_UNKNOWN) |
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| 73 | { |
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| 74 | int nsteps=(int)Math.ceil(Math.sqrt(dx*dx+dy*dy)*0.2); |
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| 75 | double norm=0.2*scale/Math.sqrt(dx*dx+dy*dy); |
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| 76 | double ox=norm*dy,oy=-norm*dx; |
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| 77 | int sz=1+3*(nsteps+1); |
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| 78 | double[] x=new double[sz],y=new double[sz]; |
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| 79 | boolean[] ctrl=new boolean[sz]; |
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| 80 | x[0]=x1; y[0]=y1; ctrl[0]=false; |
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| 81 | for (int i=0,j=1;i<=nsteps;i++,j+=3) |
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| 82 | { |
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| 83 | double ax=x1+i*dx/(nsteps+1),ay=y1+i*dy/(nsteps+1); |
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| 84 | double cx=x1+(i+1)*dx/(nsteps+1),cy=y1+(i+1)*dy/(nsteps+1); |
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| 85 | double bx=(ax+cx)/2,by=(ay+cy)/2; |
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| 86 | int sign=i%2==0 ? 1 : -1; |
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| 87 | |||
| 88 | x[j]=ax; x[j+1]=bx+sign*ox; x[j+2]=cx; |
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| 89 | y[j]=ay; y[j+1]=by+sign*oy; y[j+2]=cy; |
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| 90 | ctrl[j]=true; ctrl[j+1]=true; ctrl[j+2]=false; |
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| 91 | } |
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| 92 | svg.drawCurve(x,y,ctrl,arrmol.lineCol(n),arrmol.lineSize(n),SVGBuilder.NOCOLOUR,false); |
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| 93 | } |
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| 94 | else if (btype==ArrangeMolecule.BLINE_DOTTED) |
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| 95 | { |
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| 96 | int nsteps=(int)Math.ceil(Math.sqrt(dx*dx+dy*dy)*0.10); |
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| 97 | float radius=(float)arrmol.lineSize(n); |
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| 98 | for (int i=0;i<=nsteps+1;i++) |
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| 99 | { |
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| 100 | double cx=x1+i*dx/(nsteps+1),cy=y1+i*dy/(nsteps+1); |
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| 101 | svg.drawOval(cx,cy,radius,radius,SVGBuilder.NOCOLOUR,0,arrmol.lineCol(n)); |
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| 102 | } |
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| 103 | } |
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| 104 | } |
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| 105 | for (int n=0;n<arrmol.numPoints();n++) |
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| 106 | { |
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| 107 | String txt=arrmol.pointText(n); |
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| 108 | if (txt==null) continue; // is a point, so do not draw anything |
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| 109 | |||
| 110 | int fstyle=arrmol.pointBold(n) ? SVGBuilder.TXTSTYLE_BOLD : SVGBuilder.TXTSTYLE_NORMAL; |
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| 111 | svg.drawText(arrmol.pointCX(n),arrmol.pointCY(n)+arrmol.pointRH(n),txt,arrmol.pointFontSize(n), |
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| 112 | arrmol.pointCol(n),fstyle,SVGBuilder.TXTALIGN_CENTRE); |
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| 113 | } |
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| 114 | } |
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| 115 | |||
| 116 | // construct the SVG document, and output it to the given writer |
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| 117 | public void build(PrintWriter out) |
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| 118 | { |
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| 119 | int w=(int)Math.ceil(svg.highX()-svg.lowX()),h=(int)Math.ceil(svg.highY()-svg.lowY()); |
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| 120 | svg.build(out,w,h,-svg.lowX(),-svg.lowY(),1,1); |
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| 121 | } |
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| 122 | |||
| 123 | // convenient function for obtaining the SVG output as a string |
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| 124 | public String toString() |
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| 125 | { |
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| 126 | StringWriter sw=new StringWriter(); |
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| 127 | build(new PrintWriter(sw)); |
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| 128 | return sw.toString(); |
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| 129 | } |
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| 130 | |||
| 131 | // implementation of measurement metrics |
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| 132 | |||
| 133 | public double scale() {return scale;} |
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| 134 | public double angToX(double AX) {return AX*scale;} |
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| 135 | public double angToY(double AY) {return -AY*scale;} |
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| 136 | public double xToAng(double PX) {return PX*scale;} |
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| 137 | public double yToAng(double PY) {return -PY*scale;} |
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| 138 | public double[] measureText(String str,double fontSize) {return svg.measureText(str,fontSize,SVGBuilder.TXTSTYLE_NORMAL);} |
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| 139 | } |