make input events consumable

Having a input queue of consumable input events allow widgets to prevent
the further handling of the same event by different collections by
consuming the event.

1 files changed, 8 insertions, 0 deletions

diff --git a/go/ui/touchManager.go b/go/ui/touchManager.go
index cedff82c..ef4448d5 100644
--- a/go/ui/touchManager.go
+++ b/go/ui/touchManager.go
@@ -49,6 +49,14 @@ type TouchInput struct {
 	Taps  []Tap
 }
 
+func (t *TouchInput) consumeTap(i int) {
+	if len(t.Taps) == 1 {
+		t.Taps = []Tap{}
+	} else {
+		t.Taps[i] = t.Taps[len(t.Taps)-1]
+	}
+}
+
 var (
 	TouchManager *TouchInput
 )