importantmessageswidget.h

//------------------------------------------------------------------------------
// importantmessageswidget.h
//------------------------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301  USA
//
//------------------------------------------------------------------------------
// Copyright (C) 2011 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------
#ifndef __IMPORTANTMESSAGESWIDGET_H__
#define __IMPORTANTMESSAGESWIDGET_H__

#include "dptr.h"

#include <QSharedPointer>
#include <QWidget>

class QDateTime;
class QLabel;
class QVBoxLayout;

class ImportantMessagesWidget : public QWidget
{
        Q_OBJECT

public:
        class Handler
        {
        public:
                virtual ~Handler() = default;
                virtual void remove() = 0;
        };
        friend class Handler;

        ImportantMessagesWidget(QWidget *pParent = nullptr);
        ~ImportantMessagesWidget() override;

        unsigned maxMessages() const;
        void setMaxMessages(unsigned num);

public slots:
        QSharedPointer<Handler> addMessage(const QString &message);

        QSharedPointer<Handler> addMessage(const QString &message, const QDateTime &dateTime);

        QSharedPointer<Handler> addMessage(const QString &message, unsigned timestamp);

        void clear();

        void removeOldest(int num);

        void removeOneOldest();

private:
        DPtr<ImportantMessagesWidget> d;

        void remove(QLabel *label);

private slots:
        void dropOldWidgetsIfBeyondLimit();
};

#endif