From 47e37635f50c09b4f9a9ee7699e3120bab3e4088 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Sun, 10 Apr 2016 04:29:29 +0200
Subject: NOISSUE split GUI stuff from logic library

---
 libraries/logic/DefaultVariable.h | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 libraries/logic/DefaultVariable.h

(limited to 'libraries/logic/DefaultVariable.h')

diff --git a/libraries/logic/DefaultVariable.h b/libraries/logic/DefaultVariable.h
new file mode 100644
index 00000000..38d7ecc2
--- /dev/null
+++ b/libraries/logic/DefaultVariable.h
@@ -0,0 +1,35 @@
+#pragma once
+
+template <typename T>
+class DefaultVariable
+{
+public:
+	DefaultVariable(const T & value)
+	{
+		defaultValue = value;
+	}
+	DefaultVariable<T> & operator =(const T & value)
+	{
+		currentValue = value;
+		is_default = currentValue == defaultValue;
+		is_explicit = true;
+		return *this;
+	}
+	operator const T &() const
+	{
+		return is_default ? defaultValue : currentValue;
+	}
+	bool isDefault() const
+	{
+		return is_default;
+	}
+	bool isExplicit() const
+	{
+		return is_explicit;
+	}
+private:
+	T currentValue;
+	T defaultValue;
+	bool is_default = true;
+	bool is_explicit = false;
+};
-- 
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