FreeCAD

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/***************************************************************************
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 *   Copyright (c) 2022 Wanderer Fan <wandererfan@gmail.com>               *
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 *                                                                         *
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 *   This file is part of the FreeCAD CAx development system.              *
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 *                                                                         *
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 *   This library is free software; you can redistribute it and/or         *
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 *   modify it under the terms of the GNU Library General Public           *
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 *   License as published by the Free Software Foundation; either          *
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 *   version 2 of the License, or (at your option) any later version.      *
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 *                                                                         *
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 *   This library  is distributed in the hope that it will be useful,      *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU Library General Public License for more details.                  *
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 *                                                                         *
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 *   You should have received a copy of the GNU Library General Public     *
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 *   License along with this library; see the file COPYING.LIB. If not,    *
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 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
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 *   Suite 330, Boston, MA  02111-1307, USA                                *
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 *                                                                         *
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 ***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <QGuiApplication>
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# include <QMouseEvent>
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#endif
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#include "QGVNavStyleBlender.h"
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#include "QGVPage.h"
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using namespace TechDrawGui;
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namespace TechDrawGui {
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QGVNavStyleBlender::QGVNavStyleBlender(QGVPage* qgvp) :
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    QGVNavStyle(qgvp)
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{
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}
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QGVNavStyleBlender::~QGVNavStyleBlender()
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{
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}
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void QGVNavStyleBlender::handleKeyReleaseEvent(QKeyEvent *event)
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{
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    if ((event->key() == Qt::Key_Shift) && panningActive) {
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        stopPan();
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        event->accept();
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    }
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}
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void QGVNavStyleBlender::handleMousePressEvent(QMouseEvent *event)
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{
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    Q_UNUSED(event)
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//    Base::Console().Message("QGVNSBlender::handleMousePressEvent() - button: %d buttons: %d\n", event->button(), event->buttons());
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}
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void QGVNavStyleBlender::handleMouseMoveEvent(QMouseEvent *event)
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{
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//    Base::Console().Message("QGVNSBlender::handleMouseMoveEvent() - buttons: %d modifiers: %X\n",
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//                            QGuiApplication::mouseButtons() & Qt::MiddleButton,
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//                            QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier));
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    if (getViewer()->isBalloonPlacing()) {
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        balloonCursorMovement(event);
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        return;
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    }
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    if ((QGuiApplication::mouseButtons() & Qt::LeftButton) &&
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        (QGuiApplication::mouseButtons() & Qt::RightButton)) {
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        //pan mode 1 - LMB + RMB
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        if (panningActive) {
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            pan(event->pos());
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        } else {
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            startPan(event->pos());
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        }
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        event->accept();
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    } else if ((QGuiApplication::mouseButtons() & Qt::MiddleButton) &&
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               (QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier)) ) {
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        //pan mode 2 - Shift + MMB
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        if (panningActive) {
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            pan(event->pos());
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        } else {
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            startPan(event->pos());
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        }
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        event->accept();
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    }
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}
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void QGVNavStyleBlender::handleMouseReleaseEvent(QMouseEvent *event)
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{
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//    Base::Console().Message("QGVNSBlender::handleMouseReleaseEvent() - button: %d buttons: %d\n", event->button(), event->buttons());
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    if (getViewer()->isBalloonPlacing()) {
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        placeBalloon(event->pos());
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    }
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    if (panningActive) {
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        //pan mode 1 - LMB + RMB + mouse move
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        //stop panning if either button released
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        if ( (event->button() == Qt::LeftButton) ||
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             (event->button() == Qt::RightButton)) {
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            stopPan();
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            event->accept();
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        }
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        //pan mode 2 - Shift + MMB
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        //stop panning if MMB released
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        if (event->button() == Qt::MiddleButton) {
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            stopPan();
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            event->accept();
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        }
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    }
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}
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bool QGVNavStyleBlender::allowContextMenu(QContextMenuEvent *event)
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{
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//    Base::Console().Message("QGVNSBlender::allowContextMenu()\n");
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    if (event->reason() == QContextMenuEvent::Mouse) {
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        //must check for a button combination involving context menu button
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        if (QGuiApplication::mouseButtons() & Qt::LeftButton) {
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            //LeftButton is down, so this is LMB + RMB - don't allow context menu
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            return false;
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        }
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    }
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    return true;
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}
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}  // namespace TechDrawGui
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