package chart

// GridLine is a line on a graph canvas.
type GridLine struct {
	IsMinor    bool
	IsVertical bool
	Style      Style
	Value      float64
}

// Major returns if the gridline is a `major` line.
func (gl GridLine) Major() bool {
	return !gl.IsMinor
}

// Minor returns if the gridline is a `minor` line.
func (gl GridLine) Minor() bool {
	return gl.IsMinor
}

// Vertical returns if the line is vertical line or not.
func (gl GridLine) Vertical() bool {
	return gl.IsVertical
}

// Horizontal returns if the line is horizontal line or not.
func (gl GridLine) Horizontal() bool {
	return !gl.IsVertical
}

// Render renders the gridline
func (gl GridLine) Render(r Renderer, canvasBox Box, ra Range) {
	lineleft := canvasBox.Left
	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()
}