forked from joejulian/gio
Elias Naur
37 lines
629 B
Go
37 lines
629 B
Go
package widget
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import (
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"gioui.org/gesture"
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"gioui.org/layout"
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)
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type Bool struct {
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Value bool
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// Last is the last registered click.
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Last Click
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gesture gesture.Click
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}
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// Update the checked state according to incoming events,
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// and reports whether Value changed.
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func (b *Bool) Update(gtx *layout.Context) bool {
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was := b.Value
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for _, e := range b.gesture.Events(gtx) {
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switch e.Type {
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case gesture.TypeClick:
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b.Last = Click{
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Time: gtx.Now(),
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Position: e.Position,
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}
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b.Value = !b.Value
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}
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}
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return b.Value != was
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}
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func (b *Bool) Layout(gtx *layout.Context) {
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b.gesture.Add(gtx.Ops)
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}
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