style handling on gridlines.

grid_line.go

@@ -34,15 +34,16 @@ func (gl GridLine) Horizontal() bool {
 }
 
 // Render renders the gridline
-func (gl GridLine) Render(r Renderer, canvasBox Box, ra Range) {
+func (gl GridLine) Render(r Renderer, canvasBox Box, ra Range, defaults Style) {
+	r.SetStrokeColor(gl.Style.GetStrokeColor(defaults.GetStrokeColor()))
+	r.SetStrokeWidth(gl.Style.GetStrokeWidth(defaults.GetStrokeWidth()))
+	r.SetStrokeDashArray(gl.Style.GetStrokeDashArray(defaults.GetStrokeDashArray()))
+
 	if gl.IsVertical {
 		lineLeft := canvasBox.Left + ra.Translate(gl.Value)
 		lineBottom := canvasBox.Bottom
 		lineTop := canvasBox.Top
 
-		r.SetStrokeColor(gl.Style.GetStrokeColor(DefaultAxisColor))
-		r.SetStrokeWidth(gl.Style.GetStrokeWidth(DefaultAxisLineWidth))
-
 		r.MoveTo(lineLeft, lineBottom)
 		r.LineTo(lineLeft, lineTop)
 		r.Stroke()
@@ -51,9 +52,6 @@ func (gl GridLine) Render(r Renderer, canvasBox Box, ra Range) {
 		lineRight := canvasBox.Right
 		lineHeight := canvasBox.Bottom - ra.Translate(gl.Value)
 
-		r.SetStrokeColor(gl.Style.GetStrokeColor(DefaultAxisColor))
-		r.SetStrokeWidth(gl.Style.GetStrokeWidth(DefaultAxisLineWidth))
-
 		r.MoveTo(lineLeft, lineHeight)
 		r.LineTo(lineRight, lineHeight)
 		r.Stroke()
@@ -61,17 +59,9 @@ func (gl GridLine) Render(r Renderer, canvasBox Box, ra Range) {
 }
 
 // GenerateGridLines generates grid lines.
-func GenerateGridLines(ticks []Tick, isVertical bool) []GridLine {
+func GenerateGridLines(ticks []Tick, majorStyle, minorStyle Style, isVertical bool) []GridLine {
 	var gl []GridLine
 	isMinor := false
-	minorStyle := Style{
-		StrokeColor: DefaultGridLineColor.WithAlpha(100),
-		StrokeWidth: 1.0,
-	}
-	majorStyle := Style{
-		StrokeColor: DefaultGridLineColor,
-		StrokeWidth: 1.0,
-	}
 	for _, t := range ticks {
 		s := majorStyle
 		if isMinor {