From 49886802ce2c6f7f42e6a56eb5cfe63babb7241f Mon Sep 17 00:00:00 2001
From: Nolan Darilek <nolan@thewordnerd.info>
Date: Tue, 30 Apr 2019 11:46:12 -0700
Subject: [PATCH] Emit `Show`/`Hide` events when a layout is shown or hidden.
 (#63)

---
 luigi/event.lua  | 2 ++
 luigi/layout.lua | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/luigi/event.lua b/luigi/event.lua
index b7b9579..95af72e 100644
--- a/luigi/event.lua
+++ b/luigi/event.lua
@@ -47,6 +47,8 @@ Event.names = {
     'Press', -- A pointer button was pressed and released on the same widget.
     'Change', -- A widget's value changed.
     'WheelMove', -- The scroll wheel on the mouse moved.
+    'Show', -- A layout is shown.
+    'Hide', -- A layout is hidden.
 }
 
 local weakKeyMeta = { __mode = 'k' }
diff --git a/luigi/layout.lua b/luigi/layout.lua
index 5c9164c..322218c 100644
--- a/luigi/layout.lua
+++ b/luigi/layout.lua
@@ -195,6 +195,7 @@ function Layout:show ()
     Backend.show(self)
     self.root:reshape()
 
+    Event.Show:emit(self, self)
     return self
 end
 
@@ -213,6 +214,7 @@ function Layout:hide ()
     self.isShown = nil
     Backend.hide(self)
 
+    Event.Hide:emit(self, self)
     return self
 end