//draws the isotope label at ten-o-clock
private LabelMetrics DrawIsotopeLabel(DrawingContext drawingContext, AtomTextMetrics mainAtomMetrics, AtomTextMetrics hMetrics)
{
Debug.Assert(Isotope != null);
string isoLabel = Isotope.ToString();
var isotopeText = new IsotopeLabelText(isoLabel, PixelsPerDip());
Vector isotopeOffsetVector = BasicGeometry.ScreenNorth * GlyphText.SymbolSize;
Matrix rotator = new Matrix();
double angle = -60;
//avoid overlap of label and hydrogens
if (hMetrics != null && ParentAtom.GetDefaultHOrientation() == CompassPoints.West)
{
angle = -35;
}
rotator.Rotate(angle);
isotopeOffsetVector = isotopeOffsetVector * rotator;
Point isoCenter = mainAtomMetrics.Geocenter + isotopeOffsetVector;
isotopeText.MeasureAtCenter(isoCenter);
isotopeText.Fill = Fill;
isotopeText.DrawAtBottomLeft(isotopeText.TextMetrics.BoundingBox.BottomLeft, drawingContext);
return(isotopeText.TextMetrics);
}
public void AddIsotopeWithExistingMassNumber()
{
var elementC = new Element("C", 6, 12.0106);
elementC.AddIsotope(12, 12, 0.9893);
elementC.AddIsotope(13, 13.00335483507, 0.0107);
Isotope isotope = elementC[13];
Assert.AreEqual("C{13}", isotope.ToString());
Assert.AreEqual(6, isotope.Protons);
Assert.AreEqual(7, isotope.Neutrons);
}
private Geometry DrawIsotopeLabel(Atom parentAtom, Geometry symbolGeometry)
{
Point startingPoint = parentAtom.Position;
Point nextPos;
if (parentAtom.IsotopeNumber == null)
{
return(symbolGeometry);
}
else
{
Geometry atomGeo = null;
string isoLabel = Isotope.ToString();
if (!(symbolGeometry is EllipseGeometry)) //that is, weve got an explcit, non carbon element
{
var atomText = BuildSymbolLabel(parentAtom.SymbolText, ref startingPoint, out nextPos);
atomGeo = atomText.BuildGeometry(startingPoint);
}
else //its a vertex carbon
{
atomGeo = symbolGeometry;
}
//have a stab at placing the isotope label.
//placementvector gives the CENTRE of the charge text!
//first generate a vector pointing straight up
Vector placementVector = new Vector(0.0, -Math.Max(atomGeo.Bounds.Width, atomGeo.Bounds.Height));
Matrix rotator = new Matrix();
//isotope labels always go in at 10-o-clock from the atom.
rotator.Rotate(-60);
placementVector *= rotator;
//Point firstPlacementPoint = new Point(atomGeo.Bounds.Right, atomGeo.Bounds.Top - chargeText.Height/2);
FormattedText isoText = GetSubscriptText(isoLabel);
Point firstPlacementPoint = parentAtom.Position + placementVector -
new Vector(isoText.Width / 2, isoText.Height / 2);
System.Windows.Media.Geometry isoGeo = isoText.BuildGeometry(firstPlacementPoint);
return(new CombinedGeometry(symbolGeometry, isoGeo));
}
}
