add android_back component (#5)

druid/base/android_back.lua

@@ -1,11 +1,30 @@
+local data = require("druid.data")
+
 local M = {}
 
+M.interest = {
+	data.ON_INPUT
+}
+
+
+function M.init(instance, params)
+	-- TODO: first arg store as node. Find way to escape this
+	local callback = instance.node
+	instance.event = data.A_ANDR_BACK
+	instance.callback = callback
+	instance.params = params
+end
+
+
 --- input handler
 -- @param action_id - input action id
 -- @param action - input action
 function M.on_input(instance, action_id, action)
-  instance.callback(instance.parent.parent)
+	if action[data.RELEASED] then
-  return true
+		instance.callback(instance.parent.parent, instance.params)
+	end
+	return true
 end
 
+
 return M

druid/druid.lua

@@ -9,9 +9,9 @@ local STRING = "string"
 local components = {
   -- basic
   button = require("druid.base.button"),
+  android_back = require("druid.base.android_back"),
   text = require("druid.base.text"),
   timer = require("druid.base.timer"),
-  -- android_back = require("druid.base.android_back"),
 }
 
 

example/example.gui.gui_script

@@ -30,6 +30,11 @@ function init(self)
 		print("On button 3")
 	end)
 
+
+	self.druid:new_android_back(function(self, params)
+		print("On android back", params)
+	end, 2)
+
 	self.druid:new_text("text_2", "Simple text")
 	self.druid:new_text("text_3", "locale_text", true)
 
@@ -37,7 +42,6 @@ function init(self)
 		print("On timer end")
 	end)
 
-
 end
 
 function update(self, dt)

input/game.input_binding

@@ -1,3 +1,11 @@
+key_trigger {
+  input: KEY_BACKSPACE
+  action: "back"
+}
+key_trigger {
+  input: KEY_BACK
+  action: "back"
+}
 mouse_trigger {
   input: MOUSE_BUTTON_1
   action: "touch"