AAbstractSignal.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2024 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include <exception>
 
#include <AUI/Core.h>
#include <AUI/Common/SharedPtrTypes.h>
#include <AUI/Traits/values.h>
 
class AObject;

 

class API_AUI_CORE AAbstractSignal
{
    friend class AObject;
public:
    virtual ~AAbstractSignal() {
        mDestroyed = true;
    }
 
    [[nodiscard]] bool isDestroyed() const noexcept {
        return mDestroyed;
    }
 
    virtual void clearAllConnectionsWith(aui::no_escape<AObjectBase> object) const noexcept = 0;
    virtual void clearAllConnections() const noexcept = 0;
 
    virtual void addGenericObserver(AObjectBase* object, std::function<void()> observer) = 0;
 
    [[nodiscard]]
    virtual bool hasConnectionsWith(aui::no_escape<AObjectBase> object) const noexcept = 0;
 
protected:
    void linkSlot(AObjectBase* object) noexcept;
    void unlinkSlot(AObjectBase* object) noexcept;
 
    static bool& isDisconnected();
 
    static _weak<AObject> weakPtrFromObject(AObject* object);
 
private:
    bool mDestroyed = false;
};
 
#include <AUI/Common/AObject.h>
 
inline bool& AAbstractSignal::isDisconnected() {
    return AObject::isDisconnected();
}
 
inline _weak<AObject> AAbstractSignal::weakPtrFromObject(AObject* object) { // AAbstractSignal is a friend of AObject
    return object->weakPtr();
}