Add support for variables

src/utils/variable.hpp

@@ -0,0 +1,57 @@
+#pragma once
+#include "item-selection-helpers.hpp"
+
+#include <string>
+#include <QStringList>
+#include <obs.hpp>
+
+class VariableSelection;
+class VariableSettingsDialog;
+
+class Variable : public Item {
+public:
+	Variable();
+	void Load(obs_data_t *obj);
+	void Save(obs_data_t *obj) const;
+	std::string Value() const { return _value; }
+	bool DoubleValue(double &) const;
+	void SetValue(const std::string &val) { _value = val; }
+	void SetValue(double);
+	static std::shared_ptr<Item> Create()
+	{
+		return std::make_shared<Variable>();
+	}
+
+private:
+	bool _persist = false;
+	std::string _value = "";
+
+	friend VariableSelection;
+	friend VariableSettingsDialog;
+};
+
+Variable *GetVariableByName(const std::string &name);
+Variable *GetVariableByQString(const QString &name);
+std::weak_ptr<Variable> GetWeakVariableByName(const std::string &name);
+std::weak_ptr<Variable> GetWeakVariableByQString(const QString &name);
+QStringList GetVariablesNameList();
+
+class VariableSettingsDialog : public ItemSettingsDialog {
+	Q_OBJECT
+
+public:
+	VariableSettingsDialog(QWidget *parent, const Variable &);
+	static bool AskForSettings(QWidget *parent, Variable &settings);
+
+private:
+	QLineEdit *_value;
+	QCheckBox *_persist;
+};
+
+class VariableSelection : public ItemSelection {
+	Q_OBJECT
+
+public:
+	VariableSelection(QWidget *parent = 0);
+	void SetVariable(const std::string &);
+};