Mercurial > octave
view libgui/graphics/GenericEventNotify.h @ 31706:597f3ee61a48 stable
update Octave Project Developers copyright for the new year
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 06 Jan 2023 13:11:27 -0500 |
parents | 29d734430e5f |
children | 21f9b34eb893 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2011-2023 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave is free software: you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Octave 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 General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if ! defined (octave_GenericEventNotify_h) #define octave_GenericEventNotify_h 1 #include <QSet> class QEvent; class QObject; class QWidget; OCTAVE_BEGIN_NAMESPACE(octave) class GenericEventNotifyReceiver; class GenericEventNotifySender { public: GenericEventNotifySender (void) : m_receivers () { } virtual ~GenericEventNotifySender (void) = default; void addReceiver (GenericEventNotifyReceiver *r) { m_receivers.insert (r); } void removeReceiver (GenericEventNotifyReceiver *r) { m_receivers.remove (r); } protected: bool notifyReceiversBefore (QObject *obj, QEvent *evt); void notifyReceiversAfter (QObject *obj, QEvent *evt); private: QSet<GenericEventNotifyReceiver *> m_receivers; }; class GenericEventNotifyReceiver { public: GenericEventNotifyReceiver (void) { } virtual ~GenericEventNotifyReceiver (void) = default; virtual bool eventNotifyBefore (QObject *obj, QEvent *evt) = 0; virtual void eventNotifyAfter (QObject *obj, QEvent *evt) = 0; }; inline bool GenericEventNotifySender::notifyReceiversBefore (QObject *obj, QEvent *evt) { for (auto *r : m_receivers) if (r->eventNotifyBefore (obj, evt)) return true; return false; } inline void GenericEventNotifySender::notifyReceiversAfter (QObject *obj, QEvent *evt) { for (auto *r : m_receivers) r->eventNotifyAfter (obj, evt); } OCTAVE_END_NAMESPACE(octave) #define DECLARE_GENERICEVENTNOTIFY_SENDER(T,B) \ class T : public B, public GenericEventNotifySender \ { \ public: \ T (QWidget *xparent) : B (xparent), GenericEventNotifySender () { } \ ~ T (void) = default; \ \ bool event (QEvent *evt) \ { \ bool result = true; \ if (! notifyReceiversBefore (this, evt)) \ result = B::event (evt); \ notifyReceiversAfter (this, evt); \ return result; \ } \ } #endif