Choices: components 031-040 (wip)

internal/choice.go

@@ -0,0 +1,60 @@
+package internal
+
+import (
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/theme"
+)
+
+// CheckState is what a drawn check box shows.
+type CheckState int
+
+const (
+	Unchecked CheckState = iota
+	Checked
+	Mixed
+)
+
+// CheckBox paints a square check box filling r: a tick, a dash for mixed.
+func CheckBox(p *ui.Painter, r ui.Rect, s CheckState, k theme.Tokens, hover bool) {
+	if s == Unchecked {
+		bg := k.Surface
+		if hover {
+			bg = k.SurfaceHover
+		}
+		p.Fill(r, bg, theme.ControlRadius)
+		p.Stroke(r, k.ControlBorder, theme.ControlRadius, theme.BorderWidth)
+		return
+	}
+	bg := k.Accent
+	if hover {
+		bg = k.AccentHover
+	}
+	p.Fill(r, bg, theme.ControlRadius)
+	var path ui.Path
+	if s == Mixed {
+		path.MoveTo(r.X+r.W*0.25, r.Y+r.H/2).LineTo(r.X+r.W*0.75, r.Y+r.H/2)
+	} else {
+		path.MoveTo(r.X+r.W*0.22, r.Y+r.H*0.52).LineTo(r.X+r.W*0.42, r.Y+r.H*0.72).LineTo(r.X+r.W*0.78, r.Y+r.H*0.3)
+	}
+	p.StrokePath(&path, 1.75, k.OnAccent)
+}
+
+// Chevron strokes an arrow in r pointing down, or right when right.
+func Chevron(p *ui.Painter, r ui.Rect, right bool, c ui.Color) {
+	var path ui.Path
+	if right {
+		path.MoveTo(r.X+r.W*0.38, r.Y+r.H*0.22).LineTo(r.X+r.W*0.66, r.Y+r.H/2).LineTo(r.X+r.W*0.38, r.Y+r.H*0.78)
+	} else {
+		path.MoveTo(r.X+r.W*0.22, r.Y+r.H*0.38).LineTo(r.X+r.W/2, r.Y+r.H*0.66).LineTo(r.X+r.W*0.78, r.Y+r.H*0.38)
+	}
+	p.StrokePath(&path, 1.5, c)
+}
+
+// Cross strokes an x in r.
+func Cross(p *ui.Painter, r ui.Rect, c ui.Color) {
+	var path ui.Path
+	k := r.W * 0.28
+	path.MoveTo(r.X+k, r.Y+k).LineTo(r.X+r.W-k, r.Y+r.H-k).MoveTo(r.X+r.W-k, r.Y+k).LineTo(r.X+k, r.Y+r.H-k)
+	p.StrokePath(&path, 1.5, c)
+}