add layout from Keitio

1 files changed, 20 insertions, 0 deletions

diff --git a/gui/layout/layout.go b/gui/layout/layout.go
new file mode 100644
index 0000000..4d8e616
--- /dev/null
+++ b/gui/layout/layout.go
@@ -0,0 +1,20 @@
+package layout
+
+import (
+	"image"
+)
+
+// Layout represents any graphical layout
+//
+// Lay represents the way to divide space among your childs.
+// It takes a parameter of how much space is available,
+// and returns where exactly to put its childs.
+//
+// Intercept transforms an Env channel to another.
+// This way the Layout can emit its own Events, re-emit previous ones,
+// or even stop an event from propagating, think win.MoScroll.
+// It can be a no-op.
+type Layout interface {
+	Lay(image.Rectangle) []image.Rectangle
+	Intercepter
+}