1 files changed, 49 insertions, 0 deletions
diff --git a/event.go b/event.go
new file mode 100644
index 0000000..3440926
--- /dev/null
+++ b/event.go
@@ -0,0 +1,49 @@
+package gui
+
+import "fmt"
+
+type Event string
+
+func Eventf(format string, a ...interface{}) Event {
+	return Event(fmt.Sprintf(format, a...))
+}
+
+func (e Event) Matches(format string, a ...interface{}) bool {
+	_, err := fmt.Sscanf(string(e), format, a...)
+	return err == nil
+}
+
+func MakeEventsChan() (<-chan Event, chan<- Event) {
+	out, in := make(chan Event), make(chan Event)
+
+	go func() {
+		var queue []Event
+
+		for {
+			x, ok := <-in
+			if !ok {
+				close(out)
+				return
+			}
+			queue = append(queue, x)
+
+			for len(queue) > 0 {
+				select {
+				case out <- queue[0]:
+					queue = queue[1:]
+				case x, ok := <-in:
+					if !ok {
+						for _, x := range queue {
+							out <- x
+						}
+						close(out)
+						return
+					}
+					queue = append(queue, x)
+				}
+			}
+		}
+	}()
+
+	return out, in
+}