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 <QApplication>
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# include <QGuiApplication>
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# include <QMouseEvent>
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#endif
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#include "QGVNavStyleCAD.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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QGVNavStyleCAD::QGVNavStyleCAD(QGVPage* qgvp) :
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    QGVNavStyle(qgvp)
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{
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}
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QGVNavStyleCAD::~QGVNavStyleCAD()
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{
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}
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void QGVNavStyleCAD::handleKeyReleaseEvent(QKeyEvent *event)
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{
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    //zoom mode 2
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    if ( ((event->key() == Qt::Key_Control) ||
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          (event->key() == Qt::Key_Shift)) && zoomingActive) {
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        stopZoom();
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        event->accept();
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    }
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    //pan mode 2
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    if ((event->key() == Qt::Key_Control) && 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 QGVNavStyleCAD::handleMousePressEvent(QMouseEvent *event)
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{
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//    Base::Console().Message("QGVNSCAD::handleMousePressEvent() - button: %d\n", event->button());
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    if (event->button() == Qt::MiddleButton) {
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        startClick(Qt::MiddleButton);   //for MMB center view
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    }
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    //zoom mode 2 Control + Shift + RMB click
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    if ((event->button() == Qt::RightButton) &&
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        QApplication::keyboardModifiers() == (Qt::ControlModifier | Qt::ShiftModifier)) {
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        startClick(Qt::RightButton);
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    }
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    //pan mode 2 Control + RMB click
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    if ((event->button() == Qt::RightButton) &&
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        QApplication::keyboardModifiers() == Qt::ControlModifier) {
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        startClick(Qt::RightButton);
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    }
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}
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void QGVNavStyleCAD::handleMouseMoveEvent(QMouseEvent *event)
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{
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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 the mouse moves between press and release, then it isn't a click
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    if (m_clickPending) {
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        stopClick();
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        return;
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    }
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    //pan mode 1 - MMB + move
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    if (QGuiApplication::mouseButtons() & Qt::MiddleButton) {
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        if (panningActive) {
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            pan(event->pos());
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            event->accept();
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        } else {
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            startPan(event->pos());
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            event->accept();
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        }
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    }
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    //pan mode 2 - CNTL + RMB click + move
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    if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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        panningActive) {
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        pan(event->pos());
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        event->accept();
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    } else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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        m_panPending) {
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        startPan(event->pos());
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        event->accept();
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    }
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    //zoom mode 2 - CNTL + SHIFT + RMB click + move
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    if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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        QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier) &&
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        zoomingActive) {
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        zoom(mouseZoomFactor(event->pos()));
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        event->accept();
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    } else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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        QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier) &&
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        m_zoomPending) {
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        startZoom(event->pos());
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        event->accept();
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    }
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}
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void QGVNavStyleCAD::handleMouseReleaseEvent(QMouseEvent *event)
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{
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//    Base::Console().Message("QGVNSCAD::handleMouseReleaseEvent() - button: %d\n", event->button());
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    if (getViewer()->isBalloonPlacing()) {
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        placeBalloon(event->pos());
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    }
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    if (event->button() == Qt::MiddleButton) {
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        if (m_clickPending && (m_clickButton == Qt::MiddleButton)) {
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            stopClick();
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            getViewer()->centerOn(getViewer()->mapToScene(event->pos()));
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            event->accept();
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        }
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        //pan mode 1 hold MMB + mouse move
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        if (panningActive) {
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            stopPan();
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            event->accept();
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        }
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    }
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    //zoom mode 2 Control + Shift + RMB click
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    if ((event->button() == Qt::RightButton) &&
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         QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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         QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier) &&
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         m_clickPending &&
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        (m_clickButton == Qt::RightButton)) {
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        stopClick();
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        m_zoomPending = true;
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        event->accept();
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        return;
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    }
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    //pan mode 2 starts with Control + RMB click
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    if ((event->button() == Qt::RightButton) &&
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         QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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         m_clickPending &&
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        (m_clickButton == Qt::RightButton)) {
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        stopClick();
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        m_panPending = true;
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        event->accept();
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    }
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}
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bool QGVNavStyleCAD::allowContextMenu(QContextMenuEvent *event)
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{
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//    Base::Console().Message("QGVNSCAD::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::keyboardModifiers().testFlag(Qt::ControlModifier) ||
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            (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) &&
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             QGuiApplication::keyboardModifiers().testFlag(Qt::ShiftModifier)) ) {
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            //CNTL or CNTL+Shift down - 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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