internal static RectangleF GetRect(FlexChart flexChart, IAnnotationBase anno)
{
var annotaion = anno as AnnotationBase;
PointF point = PointF.Empty;
_Size size;
SizeF sz;
if (annotaion is Line)
{
return(GetRect(flexChart, annotaion as Line));
}
else if (annotaion is Polygon)
{
return(GetRect(flexChart, annotaion as Polygon));
}
else
{
size = anno.GetSize();
sz = new SizeF((float)size.Width, (float)size.Height);
if (annotaion is Text)
{
sz = TextRenderer.MeasureText(((Text)annotaion).Content, ((Text)annotaion).ContentStyle.Font);
}
PointF loc = AnnoPointToCoords(flexChart, annotaion, annotaion.Location);
point.X = (float)(loc.X - size.Width / 2);
point.Y = (float)(loc.Y - size.Height / 2);
}
return(new RectangleF(point.X, point.Y, sz.Width, sz.Height));
}
public static PointF CoordsToAnnoPoint(FlexChart flexChart, IAnnotationBase annotation, PointF point)
{
PointF pt = PointF.Empty;
switch (annotation.Attachment)
{
case AnnotationAttachment.Absolute:
pt = point;
break;
case AnnotationAttachment.Relative:
pt = new PointF
{
X = point.X / flexChart.PlotRect.Width,
Y = point.Y / flexChart.PlotRect.Height
};
break;
case AnnotationAttachment.DataCoordinate:
double x = point.X;
double y = point.Y;
var xValue = (float)flexChart.AxisX.ConvertBack(x);
var yValue = (float)flexChart.AxisY.ConvertBack(y);
pt = new PointF(xValue, yValue);
break;
}
return(pt);
}
public static PointF AnnoPointToCoords(FlexChart flexChart, IAnnotationBase annotation, PointF point)
{
PointF pt = PointF.Empty;
switch (annotation.Attachment)
{
case AnnotationAttachment.Absolute:
pt = point;
break;
case AnnotationAttachment.Relative:
pt = new PointF
{
X = flexChart.PlotRect.Width * point.X,
Y = flexChart.PlotRect.Height * point.Y,
};
break;
case AnnotationAttachment.DataCoordinate:
pt = new PointF
{
X = (float)flexChart.AxisX.Convert(point.X),
Y = (float)flexChart.AxisY.Convert(point.Y),
};
break;
}
return(pt);
}
internal static Rect GetRect(C1FlexChart flexChart, IAnnotationBase anno)
{
var annotaion = anno as AnnotationBase;
Point point = new Point();
_Size size;
Size sz;
if (annotaion is Line)
{
return(GetRect(flexChart, annotaion as Line));
}
else if (annotaion is Polygon)
{
return(GetRect(flexChart, annotaion as Polygon));
}
else
{
size = anno.GetSize();
sz = new Size((float)size.Width, (float)size.Height);
if (annotaion is Text)
{
TextBlock txtBlock = new TextBlock();
txtBlock.FontStyle = (((Text)annotaion).Style.FontStyle);
txtBlock.Text = ((Text)annotaion).Content;
txtBlock.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
sz = txtBlock.DesiredSize;
}
Point loc = AnnoPointToCoords(flexChart, annotaion, annotaion.Location);
point.X = (float)(loc.X - size.Width / 2);
point.Y = (float)(loc.Y - size.Height / 2);
}
return(new Rect(point.X, point.Y, sz.Width, sz.Height));
}
