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/**
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**
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** @RDE_HEADER@
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** Abstract Event Dispatcher for Qt5
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** $Id$
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** $HeadURL$
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** $Author$
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Hardware-Environment: Intel-PC
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** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
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**
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** Language ........: C++ 11
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Author ...........: Jörg Turla, SPD G, Tel. 3132
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Notes .........:
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**
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** 28.04.2003, JT : First edition for use with Qt4 in START Feature Editor fee
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** 25.03.2015, JT : Refactoring for use with Qt5
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**
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** -----------------------------------------------------------------------------------------------
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*/
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#include "abstract_event_dispatcher.h"
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#include "gestures.h"
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#include <assert.h>
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#include <math.h>
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#include <QtGui/QBitmap>
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#include <QtGui/QKeyEvent>
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#include <QtGui/QMouseEvent>
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#include <QtGui/QWheelEvent>
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#include <QtWidgets/QWidget>
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#include <QtWidgets/QApplication>
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#include <QtCore/QDebug> // for debugging only
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namespace SituationMap { namespace RB
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{
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QGestureRecognizer * AbstractEventDispatcher::_applyGestureDetection = nullptr;
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unsigned int AbstractEventDispatcher::_applyGestureID = 0;
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AbstractEventDispatcher::AbstractEventDispatcher( QWidget * getEventsFrom )
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: QObject(getEventsFrom)
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, _getEventsFrom(getEventsFrom)
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, _cursorIsInWidget(false)
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, _ignoreMouseMoveTimestamp()
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, _synthesisTouchFromMouseEvents(false)
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, _deleteRequested(false)
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, _hasGrab(false)
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, _finishFlag(false)
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, _activeEvent(false)
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, _dispatcherCursor()
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, _whatsThisBackup()
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, _eventActions(nullptr)
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{
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initDispatcher();
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} /* AbstractEventDispatcher::AbstractEventDispatcher */
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AbstractEventDispatcher::AbstractEventDispatcher( QWidget * getEventsFrom, EventActionInterface * eventActions )
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: QObject(getEventsFrom)
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, _getEventsFrom(getEventsFrom)
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, _cursorIsInWidget(false)
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, _ignoreMouseMoveTimestamp()
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, _synthesisTouchFromMouseEvents(false)
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, _deleteRequested(false)
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, _hasGrab(false)
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, _finishFlag(false)
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, _activeEvent(false)
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, _dispatcherCursor()
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, _whatsThisBackup()
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, _eventActions(eventActions)
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{
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initDispatcher();
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} /* AbstractEventDispatcher::AbstractEventDispatcher */
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void AbstractEventDispatcher::initDispatcher()
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{
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_restoreCursor = true;
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/* The methode QWidget::ownCursor doesn't exist any more.
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* Try to find out if the inherited from parent
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*/
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// _restoreCursor = getEventsFrom->ownCursor();
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if (_restoreCursor)
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{
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_cursorToRestore = getCursorFromWidget();
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}
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_restoreMouseTracking = _getEventsFrom->hasMouseTracking();
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// just a test exe, but remove process Events
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// QCoreApplication::process Events ( ); /// removePostedEvents( _getEventsFrom );
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_getEventsFrom->setMouseTracking(true);
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_getEventsFrom->raise();
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_getEventsFrom->installEventFilter(this);
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_synthesisTouchFromMouseEvents = QCoreApplication::testAttribute( Qt::AA_SynthesizeTouchForUnhandledMouseEvents );
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QCoreApplication::setAttribute( Qt::AA_SynthesizeTouchForUnhandledMouseEvents, false );
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QCoreApplication::setAttribute( Qt::AA_SynthesizeMouseForUnhandledTouchEvents, true );
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#ifdef NEVER
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static const Qt::GestureType gestures[] = { Qt::GestureType::TapGesture
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, Qt::GestureType::TapAndHoldGesture
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, Qt::GestureType::PanGesture
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, Qt::GestureType::PinchGesture
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, Qt::GestureType::SwipeGesture };
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for (auto gestureType : gestures) _getEventsFrom->grabGesture(gestureType);
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if (_applyGestureDetection == nullptr)
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{
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_applyGestureDetection = new ApplyGestureRecognizer();
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_applyGestureID = QGestureRecognizer::registerRecognizer( _applyGestureDetection );
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}
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_getEventsFrom->grabGesture( (Qt::GestureType)_applyGestureID );
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_getEventsFrom->setAttribute( Qt::WA_AcceptTouchEvents, true );
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#endif
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} /* AbstractEventDispatcher::initDispatcher */
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AbstractEventDispatcher::~AbstractEventDispatcher()
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{
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_finishFlag = true;
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if (_getEventsFrom)
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{
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_getEventsFrom->removeEventFilter(this);
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_getEventsFrom->setMouseTracking( _restoreMouseTracking );
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ungrab();
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if (!_whatsThisBackup.isNull())
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{
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_getEventsFrom->setWhatsThis(_whatsThisBackup);
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}
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}
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QCoreApplication::setAttribute( Qt::AA_SynthesizeTouchForUnhandledMouseEvents, _synthesisTouchFromMouseEvents );
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} /* AbstractEventDispatcher::~AbstractEventDispatcher */
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void AbstractEventDispatcher::onDo_delete()
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{
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if (_deleteRequested) return;
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_deleteRequested = true;
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QObject::deleteLater();
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} /* AbstractEventDispatcher::onDo_delete */
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void AbstractEventDispatcher::KickTheBucket()
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{
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if (_getEventsFrom == nullptr) return;
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_finishFlag = true;
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unlinkEventDispatcher();
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_getEventsFrom->removeEventFilter(this);
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_getEventsFrom->setMouseTracking( _restoreMouseTracking );
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ungrab();
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if (!_whatsThisBackup.isNull())
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{
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_getEventsFrom->setWhatsThis(_whatsThisBackup);
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}
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_getEventsFrom = nullptr;
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emit signalKickTheBucket();
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QCoreApplication::flush();
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// just a test exe, but remove process Events
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// QCoreApplication::process Events(); // dispatch window system events
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onDo_delete();
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} /* AbstractEventDispatcher::KickTheBucket */
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void AbstractEventDispatcher::onDo_kickTheBucket() { KickTheBucket(); }
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void AbstractEventDispatcher::setWhatsThis(const QString & whatsThis)
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{
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if (_whatsThisBackup.isNull())
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{
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_whatsThisBackup = _getEventsFrom->whatsThis();
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}
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_getEventsFrom->setWhatsThis(whatsThis);
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} /* AbstractEventDispatcher::setWhatsThis */
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void AbstractEventDispatcher::grab()
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{
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if (_hasGrab) return;
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_hasGrab = true;
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setCursorToWidget( _dispatcherCursor );
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_getEventsFrom -> setFocus();
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} /* AbstractEventDispatcher::Grab */
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void AbstractEventDispatcher::ungrab()
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{
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if (!_hasGrab) return;
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_hasGrab = false;
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if (_restoreCursor)
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{
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setCursorToWidget( _cursorToRestore );
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}
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// else _getEventsFrom -> unsetCursor();
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_getEventsFrom -> clearFocus();
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} /* AbstractEventDispatcher::Ungrab */
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bool AbstractEventDispatcher::eventFilter( QObject * widget, QEvent * e )
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{
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if (widget != ((QObject*)_getEventsFrom)) return false;
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return false;
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} /* AbstractEventDispatcher::eventFilter */
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void AbstractEventDispatcher::setCursorToWidget( const QCursor & cursor )
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{
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* The cursor handling of QGraphicView are not free of bugs. If it tries to restore the default cursor after setting a special cursor for one item
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* it can happend that the restored cursor is not the last cursor that was set with setCursor function because the internal stored restore cursor is
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* not updated with setCursor function. As work around a mouse move event is send to the widget to reset cursor handling.
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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const QPoint & currentCursorPosition = _getEventsFrom->mapFromGlobal( QCursor::pos() );
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#ifdef ShowBug
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QMouseEvent && mouseEvent = QMouseEvent( QEvent::Type::MouseMove, QPointF(-1,-1), Qt::MouseButton::NoButton, Qt::MouseButtons(), Qt::KeyboardModifier::NoModifier );
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_ignoreMouseMoveTimestamp = mouseEvent.timestamp();
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QCoreApplication::sendEvent(_getEventsFrom, &mouseEvent );
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QCoreApplication::process Events();
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_getEventsFrom -> setCursor( cursor );
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if (_cursorIsInWidget)
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{
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mouseEvent = QMouseEvent( QEvent::Type::MouseMove, currentCursorPosition, Qt::MouseButton::NoButton, Qt::MouseButtons(), Qt::KeyboardModifier::NoModifier );
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QCoreApplication::sendEvent(_getEventsFrom, &mouseEvent );
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}
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QCoreApplication::process Events();
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_getEventsFrom -> update();
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#else
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_getEventsFrom -> setCursor( cursor );
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#endif
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} /* AbstractEventDispatcher::setCursorToWidget */
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QCursor AbstractEventDispatcher::getCursorFromWidget()
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{
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const QPoint & currentCursorPosition = _getEventsFrom->mapFromGlobal( QCursor::pos() );
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#ifdef ShowBug
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QMouseEvent && mouseEvent = QMouseEvent( QEvent::Type::MouseMove, QPointF(-1,-1), Qt::MouseButton::NoButton, Qt::MouseButtons(), Qt::KeyboardModifier::NoModifier );
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_ignoreMouseMoveTimestamp = mouseEvent.timestamp();
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QCoreApplication::sendEvent(_getEventsFrom, &mouseEvent );
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QCoreApplication::process Events();
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const QCursor & currentCursor = _getEventsFrom->cursor();
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if (_cursorIsInWidget)
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{
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mouseEvent = QMouseEvent( QEvent::Type::MouseMove, currentCursorPosition, Qt::MouseButton::NoButton, Qt::MouseButtons(), Qt::KeyboardModifier::NoModifier );
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QCoreApplication::sendEvent(_getEventsFrom, &mouseEvent );
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}
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QCoreApplication::process Events();
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_getEventsFrom -> update();
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#else
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const QCursor & currentCursor = _getEventsFrom->cursor();
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#endif
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return currentCursor;
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} /* AbstractEventDispatcher::getCursorFromWidget */
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} } /* namespace SituationMap::RB */
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