add sample: line

samples/line/line.go

@@ -0,0 +1,30 @@
+// 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 (
+	"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) {
+	// Draw the line
+	for x := 5.0; x < 297; x += 10 {
+		Draw(gc, x, 0, x, 210)
+	}
+
+	// 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()
+}