diff --git a/druid/extended/checkbox.lua b/druid/extended/checkbox.lua
old mode 100644
new mode 100755
index e45caa8..8195c44
--- a/druid/extended/checkbox.lua
+++ b/druid/extended/checkbox.lua
@@ -49,13 +49,14 @@ end
 -- @tparam node node Gui node
 -- @tparam function callback Checkbox callback
 -- @tparam[opt=node] node click_node Trigger node, by default equals to node
-function Checkbox.init(self, node, callback, click_node)
+-- @tparam[opt=false] boolean initial_state The initial state of checkbox, default - false
+function Checkbox.init(self, node, callback, click_node, initial_state)
 	self.druid = self:get_druid()
 	self.node = self:get_node(node)
 	self.click_node = self:get_node(click_node)
 
 	self.button = self.druid:new_button(self.click_node or self.node, on_click)
-	self:set_state(false, true)
+	self:set_state(initial_state, true, true)
 
 	self.on_change_state = Event(callback)
 end
@@ -70,13 +71,16 @@ end
 -- @tparam Checkbox self
 -- @tparam bool state Checkbox state
 -- @tparam bool is_silent Don't trigger on_change_state if true
-function Checkbox.set_state(self, state, is_silent)
+-- @tparam bool is_instant If instant checkbox change
+function Checkbox.set_state(self, state, is_silent, is_instant)
 	self.state = state
-	self.style.on_change_state(self, self.node, state)
+	self.style.on_change_state(self, self.node, state, is_instant)
 
 	if not is_silent then
 		self.on_change_state:trigger(self:get_context(), state)
 	end
+
+	return self
 end