initial commit.

style.go

@@ -0,0 +1,39 @@
+package chart
+
+import "image/color"
+
+// Style is a simple style set.
+type Style struct {
+	StrokeColor color.RGBA
+	FillColor   color.RGBA
+	StrokeWidth int
+}
+
+// IsZero returns if the object is set or not.
+func (s Style) IsZero() bool {
+	return ColorIsZero(s.StrokeColor) && ColorIsZero(s.FillColor) && s.StrokeWidth == 0
+}
+
+// GetStrokeColor returns the stroke color.
+func (s Style) GetStrokeColor() color.RGBA {
+	if ColorIsZero(s.StrokeColor) {
+		return DefaultLineColor
+	}
+	return s.StrokeColor
+}
+
+// GetFillColor returns the fill color.
+func (s Style) GetFillColor() color.RGBA {
+	if ColorIsZero(s.FillColor) {
+		return DefaultFillColor
+	}
+	return s.FillColor
+}
+
+// GetStrokeWidth returns the stroke width.
+func (s Style) GetStrokeWidth() int {
+	if s.StrokeWidth == 0 {
+		return DefaultLineWidth
+	}
+	return s.StrokeWidth
+}