LightningChart Support Forums

Code: Select all

AnnotationXY annotation = new AnnotationXY(ChartView.ViewXY, ChartView.ViewXY.XAxes[1], ChartView.ViewXY.YAxes[1])
{
    Style = AnnotationStyle.Rectangle,
    LocationCoordinateSystem = CoordinateSystem.RelativeCoordinatesToTarget,
    BorderVisible = false,
    AllowDragging = false,
    AllowResize = false,
    AllowRotate = false,
    AllowTargetMove = false,
    AllowAnchorAdjust = false,
    AllowUserInteraction = false,
    Anchor = new PointDoubleXY(0, 1),
    AutoSizePadding = 2,
    ArrowStyleBegin = ArrowStyle.None,
    ArrowStyleEnd = ArrowStyle.None,
    Behind = true,
    KeepVisible = false,
    Visible = false,
    Sizing = AnnotationXYSizing.Automatic
};

Code: Select all

            AnnotationXY annotation = ChartView.ViewXY.Annotations[0];
            var annotationWidth = annotation.SizeScreenCoords.Width;
            var annotationHeight = annotation.SizeScreenCoords.Height;

Code: Select all

            float fMaxWidth = 0;
            float fMaxHeight = 0;
            string[] aContent = annotation.Text.Split('\n');
            for (int i = 0; i < aContent.Length; i++)
            {
                var point = _chart.MeasureTextPX(aContent[i], annotation.TextStyle.Font);
                if (fMaxWidth < point.X)
                    fMaxWidth = point.X;
                fMaxHeight += point.Y;
            }
            size = new Size(fMaxWidth + 2 * annotation.AutoSizePadding, fMaxHeight + 35);