From e530adccb66738e41d8eb9c7d042e38d3221f869 Mon Sep 17 00:00:00 2001
From: vicanso <tree.xie@outlook.com>
Date: Thu, 28 Jul 2022 20:49:00 +0800
Subject: [PATCH] feat: support stroke width of line chart

---
 chart_option.go             | 2 ++
 charts.go                   | 9 +++++----
 examples/line_chart/main.go | 1 +
 line_chart.go               | 8 +++++++-
 4 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/chart_option.go b/chart_option.go
index 71e9dfc..58001bd 100644
--- a/chart_option.go
+++ b/chart_option.go
@@ -64,6 +64,8 @@ type ChartOption struct {
 	BackgroundColor Color
 	// The flag for show symbol of line, set this to *false will hide symbol
 	SymbolShow *bool
+	// The stroke width of line chart
+	LineStrokeWidth float64
 	// The child charts
 	Children []ChartOption
 }
diff --git a/charts.go b/charts.go
index 92a7e54..d65f3c9 100644
--- a/charts.go
+++ b/charts.go
@@ -377,10 +377,11 @@ func Render(opt ChartOption, opts ...OptionFunc) (*Painter, error) {
 	if len(lineSeriesList) != 0 {
 		handler.Add(func() error {
 			_, err := NewLineChart(p, LineChartOption{
-				Theme:      opt.theme,
-				Font:       opt.font,
-				XAxis:      opt.XAxis,
-				SymbolShow: opt.SymbolShow,
+				Theme:       opt.theme,
+				Font:        opt.font,
+				XAxis:       opt.XAxis,
+				SymbolShow:  opt.SymbolShow,
+				StrokeWidth: opt.LineStrokeWidth,
 			}).render(renderResult, lineSeriesList)
 			return err
 		})
diff --git a/examples/line_chart/main.go b/examples/line_chart/main.go
index 5edf65b..36eabee 100644
--- a/examples/line_chart/main.go
+++ b/examples/line_chart/main.go
@@ -96,6 +96,7 @@ func main() {
 				Bottom: 10,
 			}
 			opt.SymbolShow = charts.FalseFlag()
+			opt.LineStrokeWidth = 1
 		},
 	)
 
diff --git a/line_chart.go b/line_chart.go
index dee122f..3942d70 100644
--- a/line_chart.go
+++ b/line_chart.go
@@ -62,6 +62,8 @@ type LineChartOption struct {
 	Legend LegendOption
 	// The flag for show symbol of line, set this to *false will hide symbol
 	SymbolShow *bool
+	// The stroke width of line
+	StrokeWidth float64
 	// background is filled
 	backgroundIsFilled bool
 }
@@ -95,12 +97,16 @@ func (l *lineChart) render(result *defaultRenderResult, seriesList SeriesList) (
 		markPointPainter,
 		markLinePainter,
 	}
+	strokeWidth := opt.StrokeWidth
+	if strokeWidth == 0 {
+		strokeWidth = defaultStrokeWidth
+	}
 	for index := range seriesList {
 		series := seriesList[index]
 		seriesColor := opt.Theme.GetSeriesColor(series.index)
 		drawingStyle := Style{
 			StrokeColor: seriesColor,
-			StrokeWidth: defaultStrokeWidth,
+			StrokeWidth: strokeWidth,
 		}
 
 		seriesPainter.SetDrawingStyle(drawingStyle)