widget: rename CheckBox to Bool

We're about to introduce the Switch widget that re-uses the same
state type as CheckBox. The Bool name covers both uses.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

widget/bool.go

@@ -0,0 +1,26 @@
+package widget
+
+import (
+	"gioui.org/gesture"
+	"gioui.org/layout"
+)
+
+type Bool struct {
+	Value bool
+
+	click gesture.Click
+}
+
+// Update the checked state according to incoming events.
+func (b *Bool) Update(gtx *layout.Context) {
+	for _, e := range b.click.Events(gtx) {
+		switch e.Type {
+		case gesture.TypeClick:
+			b.Value = !b.Value
+		}
+	}
+}
+
+func (b *Bool) Layout(gtx *layout.Context) {
+	b.click.Add(gtx.Ops)
+}

widget/checkbox.go

@@ -1,26 +0,0 @@
-package widget
-
-import (
-	"gioui.org/gesture"
-	"gioui.org/layout"
-)
-
-type CheckBox struct {
-	Checked bool
-
-	click gesture.Click
-}
-
-// Update the checked state according to incoming events.
-func (c *CheckBox) Update(gtx *layout.Context) {
-	for _, e := range c.click.Events(gtx) {
-		switch e.Type {
-		case gesture.TypeClick:
-			c.Checked = !c.Checked
-		}
-	}
-}
-
-func (c *CheckBox) Layout(gtx *layout.Context) {
-	c.click.Add(gtx.Ops)
-}

widget/material/checkbox.go

@@ -28,8 +28,8 @@ func CheckBox(th *Theme, label string) CheckBoxStyle {
 }
 
 // Layout updates the checkBox and displays it.
-func (c CheckBoxStyle) Layout(gtx *layout.Context, checkBox *widget.CheckBox) {
+func (c CheckBoxStyle) Layout(gtx *layout.Context, checkBox *widget.Bool) {
 	checkBox.Update(gtx)
-	c.layout(gtx, checkBox.Checked)
+	c.layout(gtx, checkBox.Value)
 	checkBox.Layout(gtx)
 }