fixing bug with annotations with axis turned off.

annotation_series.go

@@ -29,10 +29,49 @@ func (as AnnotationSeries) GetYAxis() YAxisType {
 	return as.YAxis
 }
 
+// Measure returns a bounds box of the series.
+func (as AnnotationSeries) Measure(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) Box {
+	box := Box{
+		Top:    canvasBox.Bottom,
+		Left:   canvasBox.Right,
+		Right:  canvasBox.Left,
+		Bottom: canvasBox.Top,
+	}
+	if as.Style.Show {
+		style := as.Style.WithDefaultsFrom(Style{
+			Font:        defaults.Font,
+			FillColor:   DefaultAnnotationFillColor,
+			FontSize:    DefaultAnnotationFontSize,
+			StrokeColor: defaults.StrokeColor,
+			StrokeWidth: defaults.StrokeWidth,
+			Padding:     DefaultAnnotationPadding,
+		})
+		for _, a := range as.Annotations {
+			lx := canvasBox.Right - xrange.Translate(a.X)
+			ly := yrange.Translate(a.Y) + canvasBox.Top
+			aBox := MeasureAnnotation(r, canvasBox, xrange, yrange, style, lx, ly, a.Label)
+			if aBox.Top < box.Top {
+				box.Top = aBox.Top
+			}
+			if aBox.Left < box.Left {
+				box.Left = aBox.Left
+			}
+			if aBox.Right > box.Right {
+				box.Right = aBox.Right
+			}
+			if aBox.Bottom > box.Bottom {
+				box.Bottom = aBox.Bottom
+			}
+		}
+	}
+	return box
+}
+
 // Render draws the series.
 func (as AnnotationSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
 	if as.Style.Show {
 		style := as.Style.WithDefaultsFrom(Style{
+			Font:        defaults.Font,
 			FillColor:   DefaultAnnotationFillColor,
 			FontSize:    DefaultAnnotationFontSize,
 			StrokeColor: defaults.StrokeColor,