snapshot.

_examples/text_rotation/main.go

@@ -57,33 +57,6 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
 	}
 
 	res.Header().Set("Content-Type", "image/png")
-	graph.Elements = []chart.Renderable{
-		func(r chart.Renderer, cb chart.Box, defaults chart.Style) {
-
-			b := chart.Box{Top: 70, Left: 100, Right: 170, Bottom: 300}
-
-			cx, cy := b.Center()
-
-			chart.Draw.Box(r, chart.Box{Top: cy - 2, Left: cx - 2, Right: cx + 2, Bottom: cy + 2}, chart.Style{
-				StrokeWidth: 2,
-				StrokeColor: chart.ColorBlack,
-			})
-
-			chart.Draw.Box(r, b, chart.Style{
-				StrokeWidth: 2,
-				StrokeColor: chart.ColorBlue,
-			})
-			chart.Draw.Box(r, b.BoundedRotate(chart.Math.DegreesToRadians(60)), chart.Style{
-				StrokeWidth: 2,
-				StrokeColor: chart.ColorRed,
-			})
-
-			chart.Draw.BoxRotated(r, b, chart.Math.DegreesToRadians(60), chart.Style{
-				StrokeWidth: 2,
-				StrokeColor: chart.ColorOrange,
-			})
-		},
-	}
 	graph.Render(chart.PNG, res)
 }
 

chart.go

@@ -102,12 +102,12 @@ func (c Chart) Render(rp RendererProvider, w io.Writer) error {
 
 	if c.hasAxes() {
 		xt, yt, yta = c.getAxesTicks(r, xr, yr, yra, xf, yf, yfa)
-		canvasBox = c.getAxisAdjustedCanvasBox(r, canvasBox, xr, yr, yra, xt, yt, yta)
+		canvasBox = c.getAxesAdjustedCanvasBox(r, canvasBox, xr, yr, yra, xt, yt, yta)
 		xr, yr, yra = c.setRangeDomains(canvasBox, xr, yr, yra)
 
 		// do a second pass in case things haven't settled yet.
 		xt, yt, yta = c.getAxesTicks(r, xr, yr, yra, xf, yf, yfa)
-		canvasBox = c.getAxisAdjustedCanvasBox(r, canvasBox, xr, yr, yra, xt, yt, yta)
+		canvasBox = c.getAxesAdjustedCanvasBox(r, canvasBox, xr, yr, yra, xt, yt, yta)
 		xr, yr, yra = c.setRangeDomains(canvasBox, xr, yr, yra)
 	}
 
@@ -320,14 +320,16 @@ func (c Chart) getAxesTicks(r Renderer, xr, yr, yar Range, xf, yf, yfa ValueForm
 	return
 }
 
-func (c Chart) getAxisAdjustedCanvasBox(r Renderer, canvasBox Box, xr, yr, yra Range, xticks, yticks, yticksAlt []Tick) Box {
+func (c Chart) getAxesAdjustedCanvasBox(r Renderer, canvasBox Box, xr, yr, yra Range, xticks, yticks, yticksAlt []Tick) Box {
 	axesOuterBox := canvasBox.Clone()
 	if c.XAxis.Style.Show {
 		axesBounds := c.XAxis.Measure(r, canvasBox, xr, c.styleDefaultsAxes(), xticks)
+		Draw.Box(r, axesBounds, Style{StrokeWidth: 2, StrokeColor: ColorRed})
 		axesOuterBox = axesOuterBox.Grow(axesBounds)
 	}
 	if c.YAxis.Style.Show {
 		axesBounds := c.YAxis.Measure(r, canvasBox, yr, c.styleDefaultsAxes(), yticks)
+		Draw.Box(r, axesBounds, Style{StrokeWidth: 2, StrokeColor: ColorBlue})
 		axesOuterBox = axesOuterBox.Grow(axesBounds)
 	}
 	if c.YAxisSecondary.Style.Show {

yaxis.go

@@ -84,23 +84,20 @@ func (ya YAxis) Measure(r Renderer, canvasBox Box, ra Range, defaults Style, tic
 	}
 
 	ya.TickStyle.InheritFrom(ya.Style.InheritFrom(defaults)).WriteToRenderer(r)
-
 	var minx, maxx, miny, maxy = math.MaxInt32, 0, math.MaxInt32, 0
 	var maxTextHeight int
 	for _, t := range ticks {
-
 		v := t.Value
 		ly := canvasBox.Bottom - ra.Translate(v)
 
 		tb := r.MeasureText(t.Label)
+		tbh2 := tb.Height() >> 1
 		finalTextX := tx
 		if ya.AxisType == YAxisSecondary {
 			finalTextX = tx - tb.Width()
 		}
 
-		if tb.Height() > maxTextHeight {
-			maxTextHeight = tb.Height()
-		}
+		maxTextHeight = Math.MaxInt(tb.Height(), maxTextHeight)
 
 		if ya.AxisType == YAxisPrimary {
 			minx = canvasBox.Right
@@ -109,8 +106,9 @@ func (ya YAxis) Measure(r Renderer, canvasBox Box, ra Range, defaults Style, tic
 			minx = Math.MinInt(minx, finalTextX)
 			maxx = Math.MaxInt(maxx, tx)
 		}
-		miny = Math.MinInt(miny, ly-tb.Height()>>1)
-		maxy = Math.MaxInt(maxy, ly+tb.Height()>>1)
+
+		miny = Math.MinInt(miny, ly-tbh2)
+		maxy = Math.MaxInt(maxy, ly+tbh2)
 	}
 
 	if ya.NameStyle.Show && len(ya.Name) > 0 {