Add a Lua script to exercise the LuaDialog

scripts/_dialog_test.lua

@@ -0,0 +1,89 @@
+ardour { ["type"] = "Snippet", name = "Dialog Test" }
+
+function factory () return function ()
+	local md = LuaDialog.Message ("title", "hello", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close)
+	print (md:run())
+
+	md = nil
+	collectgarbage ()
+
+	-----------------------------------------------------------------
+	function basic_serialize (o)
+		if type(o) == "number" then
+			return tostring(o)
+		else
+			return string.format("%q", o)
+		end
+	end
+
+	function serialize (name, value)
+		local rv = name .. ' = '
+		collectgarbage()
+		if type(value) == "number" or type(value) == "string" or type(value) == "nil" or type (value) == "boolean" then
+			return rv .. basic_serialize(value) .. ' '
+		elseif type(value) == "table" then
+			rv = rv .. '{} '
+			for k,v in pairs(value) do
+				local fieldname = string.format("%s[%s]", name, basic_serialize(k))
+				rv = rv .. serialize(fieldname, v) .. ' '
+			end
+			return rv
+		elseif type(value) == "function" then
+			--return rv .. string.format("%q", string.dump(value, true))
+			return rv .. "(function)"
+		else
+			error('cannot serialize a ' .. type(value))
+		end
+	end
+	-----------------------------------------------------------------
+
+	function func () print "Hello" end
+
+	local dialog_options = {
+		{ type = "checkbox", key = "onoff", default = true, title = "OnOff" },
+
+		{ type = "entry", key = "text", default = "changeme", title = "Text Entry" },
+
+		{
+			type = "radio", key = "select", title = "RadioBtn", values =
+			{
+				["Option 1"] = 1, ["Option 2"] = "2", ["Option A"] = 'A'
+			},
+			default = "Option 1"
+		},
+
+		{
+			type = "dropdown", key = "dropdown", title = "Menu", values =
+			{
+				["Option 1"] = 1, ["Option 2"] = "2", ["Callback"] = func,
+				["Option 4"] =
+				{
+					["Option 4a"] = "test", ["Option 4b"] = 4.2
+				}
+			},
+			default = "Option 2"
+		},
+
+		{ type = "fader", key = "gain", title = "Level",  default = -10 }, -- unit = 'dB"
+
+		{
+			type = "slider", key = "freq", title = "Frequency", min = 20, max = 20000, scalepoints =
+			{
+				[20] = "20", [200] = "nice", [2000] = "2k", [10000] = "too much"
+			},
+			default = 500
+		},
+
+		{ type = "number", key = "number", title = "Whatever",  min = 0, max = 10, step = 1, digits = 2 }
+	}
+
+	local od = LuaDialog.Dialog ("title", dialog_options)
+	local rv = od:run()
+	if (rv) then
+		print (serialize ("dialog", rv))
+	end
+
+	od = nil
+	collectgarbage ()
+
+end end