FreeCAD

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/**************************************************************************\
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 * Copyright (c) Kongsberg Oil & Gas Technologies AS
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 * All rights reserved.
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 * 
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are
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 * met:
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 * 
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 * Redistributions of source code must retain the above copyright notice,
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 * this list of conditions and the following disclaimer.
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 * 
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 * Redistributions in binary form must reproduce the above copyright
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 * notice, this list of conditions and the following disclaimer in the
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 * documentation and/or other materials provided with the distribution.
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 * 
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 * Neither the name of the copyright holder nor the names of its
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 * contributors may be used to endorse or promote products derived from
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 * this software without specific prior written permission.
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 * 
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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\**************************************************************************/
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/*!  \class SIM::Coin3D::Quarter::EventFilter EventFilter.h Quarter/eventhandlers/EventFilter.h
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*/
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#include <QEvent>
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#include <QMouseEvent>
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#include "QuarterWidget.h"
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#include "devices/Keyboard.h"
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#include "devices/Mouse.h"
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#include "devices/SpaceNavigatorDevice.h"
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#include "eventhandlers/EventFilter.h"
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namespace SIM { namespace Coin3D { namespace Quarter {
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class EventFilterP {
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public:
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  QList<InputDevice *> devices;
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  QuarterWidget * quarterwidget;
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  QPoint globalmousepos;
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  SbVec2s windowsize;
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  void trackWindowSize(QResizeEvent * event)
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  {
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    this->windowsize = SbVec2s(event->size().width(),
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                               event->size().height());
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    Q_FOREACH(InputDevice * device, this->devices) {
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      device->setWindowSize(this->windowsize);
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    }
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  }
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  void trackPointerPosition(QMouseEvent * event)
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  {
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    assert(this->windowsize[1] != -1);
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#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
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    this->globalmousepos = event->globalPosition().toPoint();
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#else
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    this->globalmousepos = event->globalPos();
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#endif
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    SbVec2s mousepos(event->pos().x(), this->windowsize[1] - event->pos().y() - 1);
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    // the following corrects for high-dpi displays (e.g. mac retina)
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    mousepos *= quarterwidget->devicePixelRatio();
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    Q_FOREACH(InputDevice * device, this->devices) {
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      device->setMousePosition(mousepos);
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    }
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  }
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};
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#define PRIVATE(obj) obj->pimpl
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}}} // namespace
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using namespace SIM::Coin3D::Quarter;
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EventFilter::EventFilter(QObject * parent)
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  : QObject(parent)
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{
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  PRIVATE(this) = new EventFilterP;
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  QuarterWidget* quarter = dynamic_cast<QuarterWidget *>(parent);
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  PRIVATE(this)->quarterwidget = quarter;
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  assert(PRIVATE(this)->quarterwidget);
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  PRIVATE(this)->windowsize = SbVec2s(PRIVATE(this)->quarterwidget->width(),
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                                      PRIVATE(this)->quarterwidget->height());
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  PRIVATE(this)->devices += new Mouse(quarter);
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  PRIVATE(this)->devices += new Keyboard(quarter);
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#ifdef HAVE_SPACENAV_LIB
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  PRIVATE(this)->devices += new SpaceNavigatorDevice(quarter);
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#endif // HAVE_SPACENAV_LIB
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}
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EventFilter::~EventFilter()
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{
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  qDeleteAll(PRIVATE(this)->devices);
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  delete PRIVATE(this);
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}
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/*!
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  Adds a device for event translation
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 */
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void 
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EventFilter::registerInputDevice(InputDevice * device)
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{
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  PRIVATE(this)->devices += device;
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}
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/*!
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  Removes a device from event translation
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 */
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void 
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EventFilter::unregisterInputDevice(InputDevice * device)
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{
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  int i = PRIVATE(this)->devices.indexOf(device);
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  if (i != -1) {
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    PRIVATE(this)->devices.removeAt(i);
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  }
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}
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/*! Translates Qt Events into Coin events and passes them on to the
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  event QuarterWidget for processing. If the event cannot be
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  translated or processed, it is forwarded to Qt and the method
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  returns false.
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 */
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bool
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EventFilter::eventFilter(QObject * obj, QEvent * qevent)
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{
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  Q_UNUSED(obj); 
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  // make sure every device has updated screen size and mouse position
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  // before translating events
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  switch (qevent->type()) {
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  case QEvent::MouseMove:
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  case QEvent::MouseButtonPress:
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  case QEvent::MouseButtonRelease:
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  case QEvent::MouseButtonDblClick:
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    PRIVATE(this)->trackPointerPosition(dynamic_cast<QMouseEvent *>(qevent));
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    break;
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  case QEvent::Resize:
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    PRIVATE(this)->trackWindowSize(dynamic_cast<QResizeEvent *>(qevent));
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    break;
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  default:
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    break;
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  }
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  // translate QEvent into SoEvent and see if it is handled by scene
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  // graph
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  Q_FOREACH(InputDevice * device, PRIVATE(this)->devices) {
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    const SoEvent * soevent = device->translateEvent(qevent);
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    if (soevent && PRIVATE(this)->quarterwidget->processSoEvent(soevent)) {
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      return true;
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    }
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  }
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  return false;
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}
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/*!
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  Returns mouse position in global coordinates
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 */
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const QPoint &
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EventFilter::globalMousePosition() const
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{
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  return PRIVATE(this)->globalmousepos;
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}
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#undef PRIVATE
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