public static GlyphUtils.GlyphInfo GetGlyphsAndInfo(string symbolText, float pixelsPerDip, out GlyphRun hydrogenGlyphRun, Point point, GlyphTypeface glyphTypeFace, double symbolSize)
{
//measure the H atom first
var glyphInfo = GlyphUtils.GetGlyphs(symbolText, glyphTypeFace, symbolSize);
hydrogenGlyphRun = GlyphUtils.GetGlyphRun(glyphInfo, glyphTypeFace,
symbolSize, pixelsPerDip, point);
//work out exactly how much we should offset from the center to get to the bottom left
return(glyphInfo);
}
public void MeasureAtBottomLeft(Point bottomLeft, float PixelsPerDip)
{
GlyphInfo = GlyphUtils.GetGlyphsAndInfo(Text, PixelsPerDip, out GlyphRun groupGlyphRun, bottomLeft, _glyphTypeface, TypeSize);
TextRun = groupGlyphRun;
TextMetrics = new AtomTextMetrics
{
BoundingBox = groupGlyphRun.GetBoundingBox(bottomLeft),
Geocenter = bottomLeft,
TotalBoundingBox = groupGlyphRun.GetBoundingBox(bottomLeft),
FlattenedPath = GlyphUtils.GetOutline(TextRun),
OffsetVector = new Vector(0.0d, 0.0d)
};
}
public void MeasureAtCenter(Point center)
{
GlyphInfo = GlyphUtils.GetGlyphsAndInfo(Text, PixelsPerDip, out GlyphRun groupGlyphRun, center, _glyphTypeface, TypeSize);
//compensate the main offset vector for any descenders
Vector mainOffset = GlyphUtils.GetOffsetVector(groupGlyphRun, TypeSize) +
new Vector(0.0, -MaxBaselineOffset);
var bb = groupGlyphRun.GetBoundingBox(center + mainOffset);
Vector textFormatterOffset = new Vector(mainOffset.X, -FirstBearing(groupGlyphRun) - bb.Height / 2);
TextRun = groupGlyphRun;
TextMetrics = new AtomTextMetrics
{
BoundingBox = bb,
Geocenter = center,
TotalBoundingBox = groupGlyphRun.GetBoundingBox(center + mainOffset),
OffsetVector = mainOffset,
TextFormatterOffset = textFormatterOffset
};
}
private void Render(Point location, string colour)
{
int textStorePosition = 0;
bool flipped;
Position = location;
if (ParentAtom == null)
{
flipped = false;
}
else
{
flipped = Flipped;
}
var textStore = new FunctionalGroupTextSource(ParentGroup, colour, flipped);
//main textformatter - this does the writing of the visual
using (TextFormatter textFormatter = TextFormatter.Create())
{
//set up the default paragraph properties
var paraprops = new FunctionalGroupTextSource.GenericTextParagraphProperties(
FlowDirection.LeftToRight,
TextAlignment.Left,
true,
false,
new LabelTextRunProperties(colour),
TextWrapping.NoWrap,
GlyphText.SymbolSize,
0d);
var anchorRuns = textStore.Runs.Where(f => f.IsAnchor);
string anchorString = string.Empty;
foreach (var run in anchorRuns)
{
anchorString += run.Text;
}
using (TextLine myTextLine =
textFormatter.FormatLine(textStore, textStorePosition, 999, paraprops, null))
{
IList <TextBounds> textBounds;
Rect firstRect = Rect.Empty;
if (!Flipped) //isolate them at the beginning
{
textBounds = myTextLine.GetTextBounds(0, anchorString.Length);
}
else
{
//isolate them at the end
var start = myTextLine.Length - 1 - anchorString.Length;
textBounds = myTextLine.GetTextBounds(start, anchorString.Length);
}
//add all the bounds together
foreach (TextBounds anchorBound in textBounds)
{
firstRect.Union(anchorBound.Rectangle);
}
//center will be position close to the origin 0,0
Point center = new Point((firstRect.Left + firstRect.Right) / 2,
(firstRect.Top + firstRect.Bottom) / 2);
//the displacement vector will be added to each relative coordinate for the glyph run
var displacementVector = location - center;
//locus is where the text line is drawn
var locus = new Point(0, 0) + displacementVector;
textBounds = myTextLine.GetTextBounds(0, 999);
var obb = textBounds[0].Rectangle;
//draw the line of text
using (DrawingContext dc = RenderOpen())
{
myTextLine.Draw(dc, locus, InvertAxes.None);
#if DEBUG
#if SHOWBOUNDS
obb.Offset(new Vector(locus.X, locus.Y));
dc.DrawRectangle(null, new Pen(new SolidColorBrush(Colors.BlueViolet), 1.0), obb);
#endif
#endif
var glyphRuns = myTextLine.GetIndexedGlyphRuns();
List <Point> outline = new List <Point>();
double advanceWidths = 0d;
//build up the convex hull from each glyph
//you need to add in the advance widths for each
//glyph run as they are traversed,
//to the outline
foreach (IndexedGlyphRun igr in glyphRuns)
{
var originalRun = textStore.GetTextRun(igr.TextSourceCharacterIndex);
var currentRun = igr.GlyphRun;
//need to work out how much the current run has been offset from the baseline
var runBounds =
myTextLine.GetTextBounds(igr.TextSourceCharacterIndex, igr.TextSourceLength);
//get the bounding rect
var rect = runBounds[0].TextRunBounds[0].Rectangle;
//it's relative to the baseline
//adjust it
rect.Offset(new Vector(locus.X, locus.Y));
var rectCopy = rect;
#if DEBUG
#if SHOWBOUNDS
dc.DrawRectangle(null, new Pen(new SolidColorBrush(Colors.DarkOrange), 1.0), rect);
#endif
#endif
var runOutline = GlyphUtils.GetOutline(currentRun);
//need to see if the run has been super or sub-scripted
var variants = originalRun.Properties.TypographyProperties.Variants;
if (variants == FontVariants.Subscript || variants == FontVariants.Superscript)
{
//simply union in the rect -it's easier!
outline.AddRange(new[]
{
rectCopy.BottomLeft, rectCopy.BottomRight, rectCopy.TopLeft,
rectCopy.TopRight
});
}
else
{
//add in the points from the convex hull
for (int i = 0; i < runOutline.Count; i++)
{
var point = runOutline[i] + displacementVector +
new Vector(0.0, myTextLine.Baseline);
point.X += advanceWidths;
runOutline[i] = point;
}
outline.AddRange(runOutline);
}
advanceWidths += currentRun.AdvanceWidths.Sum();
}
_sortedOutline = (from Point p in outline
orderby p.X ascending, p.Y descending
select p).ToList();
Hull = Geometry <Point> .GetHull(_sortedOutline, p => p);
// Diag: Show Hulls or Atom centres
#if DEBUG
#if SHOWHULLS
dc.DrawGeometry(null, new Pen(Brushes.GreenYellow, thickness: 1), HullGeometry);
#endif
#if SHOWATOMCENTRES
dc.DrawEllipse(Brushes.Red, null, ParentAtom.Position, 5, 5);
#endif
#endif
// End Diag
dc.Close();
}
}
}
}
public void DrawAtBottomLeft(Point bottomLeft, DrawingContext dc)
{
GlyphInfo = GlyphUtils.GetGlyphsAndInfo(Text, PixelsPerDip, out GlyphRun groupGlyphRun, bottomLeft, _glyphTypeface, TypeSize);
dc.DrawGlyphRun(Fill, groupGlyphRun);
TextRun = groupGlyphRun;
}