From d2533da9cf54ec92c051e178b1c043c1b9c45381 Mon Sep 17 00:00:00 2001
From: Jakub Sobon <jakub.sobon@elohim.sk>
Date: Sat, 16 Feb 2019 01:12:08 -0500
Subject: [PATCH] Make the Y axis adaptive when custom scale is provided.

---
 widgets/linechart/linechart_test.go | 1 -
 widgets/linechart/options.go        | 3 +++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/widgets/linechart/linechart_test.go b/widgets/linechart/linechart_test.go
index 6d3e2781..305fbc2c 100644
--- a/widgets/linechart/linechart_test.go
+++ b/widgets/linechart/linechart_test.go
@@ -371,7 +371,6 @@ func TestLineChartDraws(t *testing.T) {
 			desc: "custom Y scale, negative only, values fit",
 			opts: []Option{
 				YAxisCustomScale(-200, -100),
-				YAxisAdaptive(),
 			},
 			canvas: image.Rect(0, 0, 20, 10),
 			writes: func(lc *LineChart) error {
diff --git a/widgets/linechart/options.go b/widgets/linechart/options.go
index 7f23c06b..f631bbe2 100644
--- a/widgets/linechart/options.go
+++ b/widgets/linechart/options.go
@@ -140,12 +140,15 @@ type customScale struct {
 // i.e. smaller than the minimum or larger than the maximum.
 // Both the minimum and the maximum must be valid numbers and the minimum must
 // be smaller than the maximum.
+//
+// Providing this option also sets YAxisAdaptive.
 func YAxisCustomScale(min, max float64) Option {
 	return option(func(opts *options) {
 		opts.yAxisCustomScale = &customScale{
 			min: min,
 			max: max,
 		}
+		opts.yAxisMode = axes.YScaleModeAdaptive
 	})
 }