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122 lines
3 KiB
C++
122 lines
3 KiB
C++
#pragma once
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#include <memory>
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#include <string>
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#include <boost/json/object.hpp>
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#include <boost/signals2/signal.hpp>
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namespace scwx
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{
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namespace qt
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{
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namespace settings
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{
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/**
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* @brief Settings Variable base class
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*/
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class SettingsVariableBase
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{
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protected:
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explicit SettingsVariableBase(const std::string& name);
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virtual ~SettingsVariableBase();
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public:
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SettingsVariableBase(const SettingsVariableBase&) = delete;
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SettingsVariableBase& operator=(const SettingsVariableBase&) = delete;
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SettingsVariableBase(SettingsVariableBase&&) noexcept;
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SettingsVariableBase& operator=(SettingsVariableBase&&) noexcept;
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std::string name() const;
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/**
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* Gets the signal invoked when the settings variable is changed.
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*
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* @return Changed signal
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*/
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boost::signals2::signal<void()>& changed_signal();
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/**
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* Gets the signal invoked when the settings variable is staged.
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*
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* @return Staged signal
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*/
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boost::signals2::signal<void()>& staged_signal();
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/**
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* Gets whether or not the settings variable is currently set to its default
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* value.
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*
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* @return true if the settings variable is currently set to its default
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* value, otherwise false.
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*/
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virtual bool IsDefault() const = 0;
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/**
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* Gets whether or not the settings variable currently has its staged value
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* set to default.
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*
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* @return true if the settings variable currently has its staged value set
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* to default, otherwise false.
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*/
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virtual bool IsDefaultStaged() const = 0;
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/**
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* Sets the current value of the settings variable to default.
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*/
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virtual void SetValueToDefault() = 0;
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/**
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* Stages the default value of the settings variable.
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*/
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virtual void StageDefault() = 0;
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/**
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* Sets the current value of the settings variable to the staged value.
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*
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* @return true if the staged value was committed, false if no staged value
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* is present.
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*/
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virtual bool Commit() = 0;
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/**
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* Clears the staged value of the settings variable.
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*/
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virtual void Reset() = 0;
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/**
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* Reads the value from the JSON object. If the read value is out of range,
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* the value is set to the minimum or maximum. If the read value fails
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* validation, the value is set to default.
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*
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* @param json JSON object to read
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*
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* @return true if the read value is valid, false if the value was modified.
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*/
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virtual bool ReadValue(const boost::json::object& json) = 0;
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/**
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* Writes the current value to the JSON object.
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*
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* @param json JSON object to write
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*/
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virtual void WriteValue(boost::json::object& json) const = 0;
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protected:
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friend bool operator==(const SettingsVariableBase& lhs,
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const SettingsVariableBase& rhs);
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virtual bool Equals(const SettingsVariableBase& o) const;
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private:
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class Impl;
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std::unique_ptr<Impl> p;
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};
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bool operator==(const SettingsVariableBase& lhs,
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const SettingsVariableBase& rhs);
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} // namespace settings
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} // namespace qt
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} // namespace scwx
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