draw2d/samples/line/line.go

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// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 21/11/2010 by Laurent Le Goff, Stani Michiels
// Package line draws vertically spaced lines.
package line
import (
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"image/color"
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"github.com/llgcode/draw2d"
"github.com/llgcode/draw2d/samples"
)
// Main draws vertically spaced lines and returns the filename.
// This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
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gc.SetFillRule(draw2d.FillRuleWinding)
gc.Clear()
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// Draw the line
for x := 5.0; x < 297; x += 10 {
Draw(gc, x, 0, x, 210)
}
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gc.ClearRect(100, 75, 197, 135)
draw2d.Ellipse(gc, 148.5, 105, 35, 25)
gc.SetFillColor(color.RGBA{0xff, 0xff, 0x44, 0xff})
gc.FillStroke()
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// Return the output filename
return samples.Output("line", ext), nil
}
// Draw vertically spaced lines
func Draw(gc draw2d.GraphicContext, x0, y0, x1, y1 float64) {
// Draw a line
gc.MoveTo(x0, y0)
gc.LineTo(x1, y1)
gc.Stroke()
}