ui: show signature in function & method tooltip

src/lib/data/graph/token_component/TokenComponentSignature.cpp

@@ -0,0 +1,20 @@
+#include "data/graph/token_component/TokenComponentSignature.h"
+
+TokenComponentSignature::TokenComponentSignature(const std::string& signature)
+	: m_signature(signature)
+{
+}
+
+TokenComponentSignature::~TokenComponentSignature()
+{
+}
+
+std::shared_ptr<TokenComponent> TokenComponentSignature::copy() const
+{
+	return std::make_shared<TokenComponentSignature>(*this);
+}
+
+const std::string& TokenComponentSignature::getSignature() const
+{
+	return m_signature;
+}

src/lib/data/graph/token_component/TokenComponentSignature.h

@@ -0,0 +1,23 @@
+#ifndef TOKEN_COMPONENT_SIGNATURE_H
+#define TOKEN_COMPONENT_SIGNATURE_H
+
+#include <string>
+
+#include "data/graph/token_component/TokenComponent.h"
+
+class TokenComponentSignature
+	: public TokenComponent
+{
+public:
+	TokenComponentSignature(const std::string& signature);
+	virtual ~TokenComponentSignature();
+
+	virtual std::shared_ptr<TokenComponent> copy() const;
+
+	const std::string& getSignature() const;
+
+private:
+	const std::string m_signature;
+};
+
+#endif // TOKEN_COMPONENT_SIGNATURE_H