can rotate text + add y axis names

_examples/legend/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/wcharczuk/go-chart"
+)
+
+func drawChart(res http.ResponseWriter, req *http.Request) {
+
+	/*
+	   In this example we add a `Renderable` or a custom component to the `Elements` array.
+	   In this specific case it is a pre-built renderable (`CreateLegend`) that draws a legend for the chart's series.
+	   If you like, you can use `CreateLegend` as a template for writing your own renderable, or even your own legend.
+	*/
+
+	graph := chart.Chart{
+		XAxis: chart.XAxis{
+			Style: chart.Style{Show: true},
+		},
+		YAxis: chart.YAxis{
+			Style: chart.Style{Show: true},
+		},
+		Background: chart.Style{
+			Padding: chart.Box{
+				Top:  20,
+				Left: 20,
+			},
+		},
+		Series: []chart.Series{
+			chart.ContinuousSeries{
+				Name:    "A test series",
+				XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
+				YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
+			},
+		},
+	}
+
+	//note we have to do this as a separate step because we need a reference to graph
+	graph.Elements = []chart.Renderable{
+		chart.Legend(&graph),
+	}
+
+	res.Header().Set("Content-Type", "image/png")
+	graph.Render(chart.PNG, res)
+}
+
+func main() {
+	http.HandleFunc("/", drawChart)
+	http.ListenAndServe(":8080", nil)
+}