v0.1.0 initial commit

tui/checkbox.go

@@ -0,0 +1,36 @@
+package tui
+
+import (
+	"github.com/lixenwraith/terminal"
+)
+
+// CheckState represents checkbox visual state
+type CheckState uint8
+
+const (
+	CheckNone    CheckState = iota // [ ]
+	CheckPartial                   // [o]
+	CheckFull                      // [x]
+	CheckPlus                      // [+]
+)
+
+// Checkbox draws a checkbox indicator
+func (r Region) Checkbox(x, y int, state CheckState, fg terminal.RGB) {
+	if x < 0 || x+2 >= r.W || y < 0 || y >= r.H {
+		return
+	}
+	var ch rune
+	switch state {
+	case CheckNone:
+		ch = ' '
+	case CheckPartial:
+		ch = 'o'
+	case CheckFull:
+		ch = 'x'
+	case CheckPlus:
+		ch = '+'
+	}
+	r.Cell(x, y, '[', fg, terminal.RGB{}, terminal.AttrNone)
+	r.Cell(x+1, y, ch, fg, terminal.RGB{}, terminal.AttrNone)
+	r.Cell(x+2, y, ']', fg, terminal.RGB{}, terminal.AttrNone)
+}