Created an artist test thingy

elements/testing/artist.go

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+package testing
+
+import "image"
+import "image/color"
+import "git.tebibyte.media/sashakoshka/tomo/artist"
+import "git.tebibyte.media/sashakoshka/tomo/elements/core"
+
+// Artist is an element that displays shapes and patterns drawn by the artist
+// package in order to test it.
+type Artist struct {
+	*core.Core
+	core core.CoreControl
+	cellBounds image.Rectangle
+}
+
+// NewArtist creates a new artist test element.
+func NewArtist () (element *Artist) {
+	element = &Artist { }
+	element.Core, element.core = core.NewCore(element)
+	element.core.SetMinimumSize(400, 300)
+	return
+}
+
+func (element *Artist) Resize (width, height int) {
+	element.core.AllocateCanvas(width, height)
+	bounds := element.Bounds()
+	element.cellBounds.Max.X = bounds.Dx() / 4
+	element.cellBounds.Max.Y = bounds.Dy() / 4
+
+	// 0, 0
+	artist.FillRectangle (
+		element,
+		artist.Chiseled {
+			Highlight: artist.NewUniform(hex(0xFF0000FF)),
+			Shadow:    artist.NewUniform(hex(0x0000FFFF)),
+		},
+		element.cellAt(0, 0))
+
+	// 1, 0
+	artist.StrokeRectangle (
+		element,
+		artist.NewUniform(hex(0x00FF00FF)), 3,
+		element.cellAt(1, 0))
+
+	// 2, 0
+	artist.FillRectangle (
+		element,
+		artist.NewMultiBorder (
+			artist.Border { Stroke: uhex(0xFF0000FF), Weight: 1 },
+			artist.Border { Stroke: uhex(0x888800FF), Weight: 2 },
+			artist.Border { Stroke: uhex(0x00FF00FF), Weight: 3 },
+			artist.Border { Stroke: uhex(0x008888FF), Weight: 4 },
+			artist.Border { Stroke: uhex(0x0000FFFF), Weight: 5 },
+			),
+		element.cellAt(2, 0))
+}
+
+func (element *Artist) cellAt (x, y int) (image.Rectangle) {
+	return element.cellBounds.Add (image.Pt (
+		x * element.cellBounds.Dx(),
+		y * element.cellBounds.Dy()))
+}
+
+func hex (n uint32) (c color.RGBA) {
+	c.A = uint8(n)
+	c.B = uint8(n >>  8)
+	c.G = uint8(n >> 16)
+	c.R = uint8(n >> 24)
+	return
+}
+
+func uhex (n uint32) (artist.Pattern) {
+	return artist.NewUniform (color.RGBA {
+		A: uint8(n),
+		B: uint8(n >>  8),
+		G: uint8(n >> 16),
+		R: uint8(n >> 24),
+	})
+}

examples/artist/main.go

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+package main
+
+import "git.tebibyte.media/sashakoshka/tomo"
+import "git.tebibyte.media/sashakoshka/tomo/elements/testing"
+import _ "git.tebibyte.media/sashakoshka/tomo/backends/x"
+
+func main () {
+	tomo.Run(run)
+}
+
+func run () {
+	window, _ := tomo.NewWindow(128, 128)
+	window.SetTitle("Draw Test")
+	window.Adopt(testing.NewArtist())
+	window.OnClose(tomo.Stop)
+	window.Show()
+}