src/middleclickactioneventfilter.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2017 Kai Uwe Broulik <kde@privat.broulik.de>            *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "middleclickactioneventfilter.h"
  21
  22 #include <QAction>
  23 #include <QEvent>
  24 #include <QMenu>
  25 #include <QMouseEvent>
  26 #include <QToolBar>
  27
  28 MiddleClickActionEventFilter::MiddleClickActionEventFilter(QObject *parent) : QObject(parent)
  29 {
  30
  31 }
  32
  33 MiddleClickActionEventFilter::~MiddleClickActionEventFilter() = default;
  34
  35 bool MiddleClickActionEventFilter::eventFilter(QObject *watched, QEvent *event)
  36 {
  37     if (event->type() == QEvent::MouseButtonPress
  38             || event->type() == QEvent::MouseButtonRelease) {
  39         QMouseEvent *me = static_cast<QMouseEvent *>(event);
  40
  41         if (me->button() == Qt::MiddleButton) {
  42             QToolBar *toolBar = qobject_cast<QToolBar *>(watched);
  43             if (toolBar) {
  44                 QAction *action = toolBar->actionAt(me->pos());
  45                 if (action) {
  46                     if (event->type() == QEvent::MouseButtonPress) {
  47                         m_lastMiddlePressedAction = action;
  48                     } else if (event->type() == QEvent::MouseButtonRelease) {
  49                         if (m_lastMiddlePressedAction == action) {
  50                             emit actionMiddleClicked(action);
  51                         }
  52                         m_lastMiddlePressedAction = nullptr;
  53                     }
  54                 }
  55             }
  56             QMenu *menu = qobject_cast<QMenu *>(watched);
  57             if (menu) {
  58                 QAction *action = menu->actionAt(me->pos());
  59                 if (action) {
  60                     if (event->type() == QEvent::MouseButtonPress) {
  61                         m_lastMiddlePressedAction = action;
  62                     } else if (event->type() == QEvent::MouseButtonRelease) {
  63                         if (m_lastMiddlePressedAction == action) {
  64                             emit actionMiddleClicked(action);
  65                             return true;
  66                         }
  67                         m_lastMiddlePressedAction = nullptr;
  68                     }
  69                 }
  70             }
  71         }
  72     }
  73
  74     return QObject::eventFilter(watched, event);
  75 }