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-rw-r--r--vendor/github.com/llgcode/draw2d/draw2dkit/draw2dkit.go47
1 files changed, 47 insertions, 0 deletions
diff --git a/vendor/github.com/llgcode/draw2d/draw2dkit/draw2dkit.go b/vendor/github.com/llgcode/draw2d/draw2dkit/draw2dkit.go
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+++ b/vendor/github.com/llgcode/draw2d/draw2dkit/draw2dkit.go
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+// Copyright 2010 The draw2d Authors. All rights reserved.
+// created: 13/12/2010 by Laurent Le Goff
+
+// Package draw2dkit provides helpers to draw common figures using a Path
+package draw2dkit
+
+import (
+ "math"
+
+ "github.com/llgcode/draw2d"
+)
+
+// Rectangle draws a rectangle using a path between (x1,y1) and (x2,y2)
+func Rectangle(path draw2d.PathBuilder, x1, y1, x2, y2 float64) {
+ path.MoveTo(x1, y1)
+ path.LineTo(x2, y1)
+ path.LineTo(x2, y2)
+ path.LineTo(x1, y2)
+ path.Close()
+}
+
+// RoundedRectangle draws a rectangle using a path between (x1,y1) and (x2,y2)
+func RoundedRectangle(path draw2d.PathBuilder, x1, y1, x2, y2, arcWidth, arcHeight float64) {
+ arcWidth = arcWidth / 2
+ arcHeight = arcHeight / 2
+ path.MoveTo(x1, y1+arcHeight)
+ path.QuadCurveTo(x1, y1, x1+arcWidth, y1)
+ path.LineTo(x2-arcWidth, y1)
+ path.QuadCurveTo(x2, y1, x2, y1+arcHeight)
+ path.LineTo(x2, y2-arcHeight)
+ path.QuadCurveTo(x2, y2, x2-arcWidth, y2)
+ path.LineTo(x1+arcWidth, y2)
+ path.QuadCurveTo(x1, y2, x1, y2-arcHeight)
+ path.Close()
+}
+
+// Ellipse draws an ellipse using a path with center (cx,cy) and radius (rx,ry)
+func Ellipse(path draw2d.PathBuilder, cx, cy, rx, ry float64) {
+ path.ArcTo(cx, cy, rx, ry, 0, -math.Pi*2)
+ path.Close()
+}
+
+// Circle draws a circle using a path with center (cx,cy) and radius
+func Circle(path draw2d.PathBuilder, cx, cy, radius float64) {
+ path.ArcTo(cx, cy, radius, radius, 0, -math.Pi*2)
+ path.Close()
+}