Add 'zero' event

Close #3263

1 files changed, 10 insertions, 0 deletions

diff --git a/src/tui/tui.go b/src/tui/tui.go
index b8b7ae6a..a0e0b487 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -94,6 +94,7 @@ const (
 	Load
 	Focus
 	One
+	Zero
 
 	AltBS
 
@@ -283,6 +284,15 @@ type Event struct {
 	MouseEvent *MouseEvent
 }
 
+func (e Event) Is(types ...EventType) bool {
+	for _, t := range types {
+		if e.Type == t {
+			return true
+		}
+	}
+	return false
+}
+
 type MouseEvent struct {
 	Y      int
 	X      int