Пример #1
0
// Plot implements the plot.Plotter interface.
func (b *BarChart) Plot(c draw.Canvas, plt *plot.Plot) {
	trX, trY := plt.Transforms(&c)

	for i, ht := range b.Values {
		x := b.XMin + float64(i)
		xmin := trX(float64(x))
		if !c.ContainsX(xmin) {
			continue
		}
		xmin = xmin - b.Width/2 + b.Offset
		xmax := xmin + b.Width
		bottom := b.stackedOn.BarHeight(i)
		ymin := trY(bottom)
		ymax := trY(bottom + ht)

		pts := []draw.Point{
			{xmin, ymin},
			{xmin, ymax},
			{xmax, ymax},
			{xmax, ymin},
		}
		poly := c.ClipPolygonY(pts)
		c.FillPolygon(b.Color, poly)

		pts = append(pts, draw.Point{xmin, ymin})
		outline := c.ClipLinesY(pts)
		c.StrokeLines(b.LineStyle, outline...)
	}
}
Пример #2
0
func (b *BarChart) Thumbnail(c *draw.Canvas) {
	pts := []draw.Point{
		{c.Min.X, c.Min.Y},
		{c.Min.X, c.Max.Y},
		{c.Max.X, c.Max.Y},
		{c.Max.X, c.Min.Y},
	}
	poly := c.ClipPolygonY(pts)
	c.FillPolygon(b.Color, poly)

	pts = append(pts, draw.Point{c.Min.X, c.Min.Y})
	outline := c.ClipLinesY(pts)
	c.StrokeLines(b.LineStyle, outline...)
}
Пример #3
0
// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (h *Histogram) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)

	for _, bin := range h.Bins {
		pts := []draw.Point{
			{trX(bin.Min), trY(0)},
			{trX(bin.Max), trY(0)},
			{trX(bin.Max), trY(bin.Weight)},
			{trX(bin.Min), trY(bin.Weight)},
		}
		if h.FillColor != nil {
			c.FillPolygon(h.FillColor, c.ClipPolygonXY(pts))
		}
		pts = append(pts, draw.Point{trX(bin.Min), trY(0)})
		c.StrokeLines(h.LineStyle, c.ClipLinesXY(pts)...)
	}
}
Пример #4
0
// Thumbnail the thumbnail for the Line,
// implementing the plot.Thumbnailer interface.
func (pts *Line) Thumbnail(c *draw.Canvas) {
	if pts.ShadeColor != nil {
		points := []draw.Point{
			{c.Min.X, c.Min.Y},
			{c.Min.X, c.Max.Y},
			{c.Max.X, c.Max.Y},
			{c.Max.X, c.Min.Y},
		}
		poly := c.ClipPolygonY(points)
		c.FillPolygon(*pts.ShadeColor, poly)

		points = append(points, draw.Point{c.Min.X, c.Min.Y})
	} else {
		y := c.Center().Y
		c.StrokeLine2(pts.LineStyle, c.Min.X, y, c.Max.X, y)
	}
}
Пример #5
0
// Thumbnail draws a rectangle in the given style of the histogram.
func (h *Histogram) Thumbnail(c *draw.Canvas) {
	ymin := c.Min.Y
	ymax := c.Max.Y
	xmin := c.Min.X
	xmax := c.Max.X

	pts := []draw.Point{
		{xmin, ymin},
		{xmax, ymin},
		{xmax, ymax},
		{xmin, ymax},
	}
	if h.FillColor != nil {
		c.FillPolygon(h.FillColor, c.ClipPolygonXY(pts))
	}
	pts = append(pts, draw.Point{xmin, ymin})
	c.StrokeLines(h.LineStyle, c.ClipLinesXY(pts)...)
}