buttongroup.h

/*
 * Copyright (C) 2018 Microchip Technology Inc.  All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef EGT_BUTTONGROUP_H
#define EGT_BUTTONGROUP_H
 
#include <egt/detail/meta.h>
#include <functional>
#include <memory>
#include <vector>
 
namespace egt
{
inline namespace v1
{
 
class Button;
 
class EGT_API ButtonGroup
{
public:
 
    explicit ButtonGroup(bool imperative = false, bool exclusive = true) noexcept;
 
    ButtonGroup(const ButtonGroup&) = delete;
    ButtonGroup& operator=(const ButtonGroup&) = delete;
    ButtonGroup(ButtonGroup&&) = default;
    ButtonGroup& operator=(ButtonGroup&&) = default;
 
    void exclusive(bool exclusive);
 
    EGT_NODISCARD bool exclusive() const;
 
    void imperative(bool imperative);
 
    EGT_NODISCARD bool imperative() const;
 
    void add(const std::shared_ptr<Button>& button);
 
    void remove(Button* button);
 
    using CheckedCallback = std::function<void (Button& button)>;
 
    void foreach_checked(const CheckedCallback& callback);
 
    ~ButtonGroup() noexcept;
 
protected:
 
    void checked_state_change(Button& button, bool checked) const;
 
    using ButtonArray = std::vector<std::weak_ptr<Button>>;
 
    ButtonArray m_buttons;
 
    bool m_exclusive{false};
 
    bool m_imperative{true};
 
    friend class Button;
};
 
}
 
}
 
#endif