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 <QMouseEvent>
  25 #include <QToolBar>
  26
  27 MiddleClickActionEventFilter::MiddleClickActionEventFilter(QObject *parent) : QObject(parent)
  28 {
  29
  30 }
  31
  32 MiddleClickActionEventFilter::~MiddleClickActionEventFilter() = default;
  33
  34 bool MiddleClickActionEventFilter::eventFilter(QObject *watched, QEvent *event)
  35 {
  36     if (event->type() == QEvent::MouseButtonPress
  37             || event->type() == QEvent::MouseButtonRelease) {
  38         QMouseEvent *me = static_cast<QMouseEvent *>(event);
  39
  40         if (me->button() == Qt::MiddleButton) {
  41             QToolBar *toolBar = qobject_cast<QToolBar *>(watched);
  42
  43             QAction *action = toolBar->actionAt(me->pos());
  44             if (action) {
  45                 if (event->type() == QEvent::MouseButtonPress) {
  46                     m_lastMiddlePressedAction = action;
  47                 } else if (event->type() == QEvent::MouseButtonRelease) {
  48                     if (m_lastMiddlePressedAction == action) {
  49                         emit actionMiddleClicked(action);
  50                     }
  51                     m_lastMiddlePressedAction = nullptr;
  52                 }
  53             }
  54         }
  55     }
  56
  57     return QObject::eventFilter(watched, event);
  58 }