From 27e0397e6b4e79e131c474522b28796a5bb2644a Mon Sep 17 00:00:00 2001
From: Insality <insality@gmail.com>
Date: Thu, 26 Sep 2019 00:03:53 +0300
Subject: [PATCH] cherry-pick simple-checkbox component

---
 druid/base/checkbox.lua | 44 +++++++++++++++++++++++++++++++++++++++++
 druid/druid.lua         |  1 +
 2 files changed, 45 insertions(+)
 create mode 100644 druid/base/checkbox.lua

diff --git a/druid/base/checkbox.lua b/druid/base/checkbox.lua
new file mode 100644
index 0000000..cf149ff
--- /dev/null
+++ b/druid/base/checkbox.lua
@@ -0,0 +1,44 @@
+--- Druid checkbox component
+-- @module base.checkbox
+
+local helper = require("druid.helper")
+
+local M = {}
+
+
+local function state_animate(node, state)
+	local target = state and 1 or 0
+	gui.animate(node, "color.w", target, gui.EASING_OUTSINE, 0.1)
+end
+
+
+function M.set_state(self, state, is_silence)
+	if self.state == state then
+		return
+	end
+
+	self.state = state
+	state_animate(self.node, state)
+
+	if not is_silence and self.callback then
+		self.callback(self.parent.parent, state)
+	end
+end
+
+
+-- TODO: pass self as first parameter
+local function on_click(context, self)
+	M.set_state(self, not self.state)
+end
+
+
+function M.init(self, node, callback, click_node)
+	self.node = helper.get_node(node)
+	self.click_node = helper.get_node(click_node)
+	self.callback = callback
+	self.button = self.parent:new_button(self.click_node or self.node, on_click, self)
+	M.set_state(self, false, true)
+end
+
+
+return M
diff --git a/druid/druid.lua b/druid/druid.lua
index ad3618c..93c0100 100644
--- a/druid/druid.lua
+++ b/druid/druid.lua
@@ -15,6 +15,7 @@ M.comps = {
 	progress = require("druid.base.progress"),
 	grid = require("druid.base.grid"),
 	scroll = require("druid.base.scroll"),
+	checkbox = require("druid.base.checkbox"),
 
 	progress_rich = require("druid.rich.progress_rich"),
 }