private void AddAnnotations(Graphics g)
{
foreach (GraphObj obj in _pointAnnotations)
{
TextObj text = obj as TextObj;
if (text != null)
{
if (text.Location.CoordinateFrame == CoordType.ChartFraction &&
text.Location.AlignH == AlignH.Left && text.Location.AlignV == AlignV.Top)
{
GraphObjList.Add(text);
continue;
}
if (isXChartFractionObject(text) && (text.Location.X < XAxis.Scale.Min || text.Location.X > XAxis.Scale.Max))
{
continue;
}
var textRect = _labelBoundsCache.GetLabelBounds(text, this, g);
if (_overlapDetector == null || !_overlapDetector.Overlaps(textRect))
{
_manualLabels[text] = textRect;
}
}
else if (!GraphObjList.Contains(obj)) // always add non-text annotations
{
GraphObjList.Add(obj);
}
}
}
private void drawLabels(Graphics g)
{
foreach (GraphObj pa in _pointAnnotations)
{
GraphObjList.Remove(pa);
}
_pointAnnotations.Clear();
Axis xAxis = XAxis;
Axis yAxis = YAxis;
yAxis.Scale.MinAuto = false;
yAxis.Scale.Min = 0;
// setup axes scales to enable the Transform method
xAxis.Scale.SetupScaleData(this, xAxis);
yAxis.Scale.SetupScaleData(this, yAxis);
if (Chart.Rect.Width < 1 || Chart.Rect.Height < 1)
{
return;
}
Region textBoundsRegion;
Region chartRegion = new Region(Chart.Rect);
Region clipRegion = new Region();
clipRegion.MakeEmpty();
g.SetClip(Rect, CombineMode.Replace);
g.SetClip(chartRegion, CombineMode.Exclude);
/*Bitmap clipBmp = new Bitmap(Convert.ToInt32(Chart.Rect.Width), Convert.ToInt32(Chart.Rect.Height));
* Graphics clipG = Graphics.FromImage(clipBmp);
* clipG.Clear(Color.White);
* clipG.FillRegion(new SolidBrush(Color.Black), g.Clip);
* clipBmp.Save("C:\\clip.bmp");*/
// some dummy labels for very fast clipping
string baseLabel = "0";
foreach (CurveItem item in CurveList)
{
IMSGraphItemInfo info = item.Tag as IMSGraphItemInfo;
if (info != null)
{
PointAnnotation annotation = info.AnnotatePoint(new PointPair(0, 0));
if (annotation != null &&
annotation.Label != null &&
annotation.Label.Length > baseLabel.Length)
{
baseLabel = annotation.Label;
}
}
}
TextObj baseTextObj = new TextObj(baseLabel, 0, 0);
baseTextObj.FontSpec.Border.IsVisible = false;
baseTextObj.FontSpec.Fill.IsVisible = false;
PointF[] pts = baseTextObj.FontSpec.GetBox(g, baseLabel, 0, 0,
AlignH.Center, AlignV.Bottom, 1.0f, new SizeF());
float baseLabelWidth = (float)Math.Round(pts[1].X - pts[0].X);
float baseLabelHeight = (float)Math.Round(pts[2].Y - pts[0].Y);
baseLabelWidth = (float)xAxis.Scale.ReverseTransform(xAxis.Scale.Transform(0) + baseLabelWidth);
baseLabelHeight = (float)yAxis.Scale.ReverseTransform(yAxis.Scale.Transform(0) - baseLabelHeight);
float labelLengthToWidthRatio = baseLabelWidth / baseLabel.Length;
float xAxisPixel = yAxis.Scale.Transform(0);
double xMin = xAxis.Scale.Min;
double xMax = xAxis.Scale.Max;
double yMin = yAxis.Scale.Min;
double yMax = yAxis.Scale.Max;
// add automatic labels for MSGraphItems
foreach (CurveItem item in CurveList)
{
IMSGraphItemInfo info = item.Tag as IMSGraphItemInfo;
MSPointList points = item.Points as MSPointList;
if (info == null || points == null)
{
continue;
}
if (info.ToString().Length == 0)
{
continue;
}
PointPairList fullList = points.FullList;
List <int> maxIndexList = points.ScaledMaxIndexList;
for (int i = 0; i < maxIndexList.Count; ++i)
{
if (maxIndexList[i] < 0)
{
continue;
}
PointPair pt = fullList[maxIndexList[i]];
if (pt.X < xMin || pt.Y > yMax || pt.Y < yMin)
{
continue;
}
if (pt.X > xMax)
{
break;
}
float yPixel = yAxis.Scale.Transform(pt.Y);
// labelled points must be at least 3 pixels off the X axis
if (xAxisPixel - yPixel < 3)
{
continue;
}
PointAnnotation annotation = info.AnnotatePoint(pt);
if (annotation == null)
{
continue;
}
if (annotation.ExtraAnnotation != null)
{
GraphObjList.Add(annotation.ExtraAnnotation);
_pointAnnotations.Add(annotation.ExtraAnnotation);
}
if (string.IsNullOrEmpty(annotation.Label))
{
continue;
}
float pointLabelWidth = labelLengthToWidthRatio * annotation.Label.Length;
double labelY = yAxis.Scale.ReverseTransform(yPixel - 5);
if (!AllowCurveOverlap)
{
// do fast check for overlap against all MSGraphItems
bool overlap = false;
foreach (CurveItem item2 in CurveList)
{
MSPointList points2 = item2.Points as MSPointList;
if (points2 != null)
{
int nearestMaxIndex = points2.GetNearestMaxIndexToBin(i);
if (nearestMaxIndex < 0)
{
continue;
}
RectangleF r = new RectangleF((float)pt.X - pointLabelWidth / 2,
(float)labelY - baseLabelHeight,
pointLabelWidth,
baseLabelHeight);
overlap = detectLabelCurveOverlap(this, points2.FullList, nearestMaxIndex, item2 is StickItem, r);
if (overlap)
{
break;
}
}
}
if (overlap)
{
continue;
}
}
TextObj text = new TextObj(annotation.Label, pt.X, labelY,
CoordType.AxisXYScale, AlignH.Center, AlignV.Bottom)
{
ZOrder = ZOrder.A_InFront,
FontSpec = annotation.FontSpec
};
//text.IsClippedToChartRect = true;
if (!detectLabelOverlap(this, g, text, out textBoundsRegion, item.Points, maxIndexList[i], item is StickItem))
{
GraphObjList.Add(text);
_pointAnnotations.Add(text);
clipRegion.Union(textBoundsRegion);
g.SetClip(clipRegion, CombineMode.Replace);
}
}
}
// add manual annotations
foreach (CurveItem item in CurveList)
{
IMSGraphItemInfo info = item.Tag as IMSGraphItemInfo;
MSPointList points = item.Points as MSPointList;
if (info == null || points == null)
{
continue;
}
info.AddAnnotations(this, g, points, _pointAnnotations);
foreach (GraphObj obj in _pointAnnotations)
{
if (!GraphObjList.Contains(obj))
{
TextObj text = obj as TextObj;
if (text != null)
{
if (detectLabelOverlap(this, g, text, out textBoundsRegion, item.Points, -1, item is StickItem))
{
continue;
}
clipRegion.Union(textBoundsRegion);
g.SetClip(clipRegion, CombineMode.Replace);
}
GraphObjList.Add(obj);
}
}
/*GraphObjList objsToRemove = new GraphObjList();
* foreach( GraphObj obj in GraphObjList )
* if( !pointAnnotations_.Contains( obj ) )
* objsToRemove.Add( obj );
* foreach( GraphObj obj in objsToRemove )
* GraphObjList.Remove( obj );*/
}
}