1 files changed, 40 insertions, 0 deletions
diff --git a/layout/interface.go b/layout/interface.go
new file mode 100644
index 0000000..1dcf34a
--- /dev/null
+++ b/layout/interface.go
@@ -0,0 +1,40 @@
+package layout
+
+import (
+	"fmt"
+	"image"
+	"image/draw"
+)
+
+type EventDrawer interface {
+	Event() <-chan EventConsume
+	Draw() chan<- ImageFlush
+}
+
+type EventConsume struct {
+	Event   string
+	Consume chan<- bool
+}
+
+func SendEvent(ch chan<- EventConsume, format string, a ...interface{}) (consume <-chan bool) {
+	cons := make(chan bool)
+	ch <- EventConsume{fmt.Sprintf(format, a...), cons}
+	return cons
+}
+
+func (ec EventConsume) Matches(format string, a ...interface{}) bool {
+	_, err := fmt.Sscanf(ec.Event, format, a...)
+	return err == nil
+}
+
+type ImageFlush struct {
+	Image chan<- draw.Image
+	Flush <-chan image.Rectangle
+}
+
+func SendDraw(ch chan<- ImageFlush) (img <-chan draw.Image, flush chan<- image.Rectangle) {
+	imgC := make(chan draw.Image)
+	flushC := make(chan image.Rectangle)
+	ch <- ImageFlush{imgC, flushC}
+	return imgC, flushC
+}