kde-workspace/kate/part/view/katemessagewidget.h

/* This file is part of the KDE and the Kate project
 *
 *   Copyright (C) 2012 Dominik Haumann <dhaumann@kde.org>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 */

#ifndef KATE_MESSAGE_WIDGET_H
#define KATE_MESSAGE_WIDGET_H

#include <QtGui/QWidget>
#include <QtCore/QHash>
#include <QPointer>
#include <QTimer>

#include "katepartinterfaces_export.h"

namespace KTextEditor
{
  class Message;
}

class KMessageWidget;

/**
 * This class implements a message widget based on KMessageWidget.
 * It is used to show messages through the KTextEditior::MessageInterface.
 */
class KATEPARTINTERFACES_EXPORT KateMessageWidget : public QWidget
{
  Q_OBJECT

  public:
    /**
     * Constructor. By default, the widget is hidden.
     */
    KateMessageWidget(QWidget* parent, bool applyFadeEffect = false);

    /**
     * Post a new incoming message. Show either directly, or queue
     */
    void postMessage(KTextEditor::Message* message, QList<QSharedPointer<QAction> > actions);

    // for unit test
    QString text() const;

  protected Q_SLOTS:
    /**
     * Show the next message in the queue.
     */
    void showNextMessage();

    /**
     * Helper that enables word wrap to avoid breaking the layout
     */
    void setWordWrap(KTextEditor::Message* message);

    /**
     * catch when a message is deleted, then show next one, if applicable.
     */
    void messageDestroyed(KTextEditor::Message* message);
    /**
     * Start autoHide timer if requested
     */
    void startAutoHideTimer();
    /**
     * User hovers on a link in the message widget.
     */
    void linkHovered(const QString& link);

  private:
    // sorted list of pending messages
    QList<KTextEditor::Message*> m_messageQueue;
    // pointer to current Message
    QPointer<KTextEditor::Message> m_currentMessage;
    // shared pointers to QActions as guard
    QHash<KTextEditor::Message*, QList<QSharedPointer<QAction> > > m_messageHash;
    // the message widget, showing the actual contents
    KMessageWidget* m_messageWidget;

  private: // some state variables
    // autoHide only once user interaction took place
    QTimer *m_autoHideTimer;
    // flag: save message's autohide time
    int m_autoHideTime;
};

#endif

// kate: space-indent on; indent-width 2; replace-tabs on;