/** * Tablet events are handled here * @param event event info */ bool CanvasView::viewportEvent(QEvent *event) { if(event->type() == QEvent::TabletMove) { // Stylus moved QTabletEvent *tabev = static_cast<QTabletEvent*>(event); tabev->accept(); const dpcore::Point point(mapToScene(tabev->pos()), tabev->pressure()); if(!_prevpoint.intSame(point)) { if(_isdragging) moveDrag(tabev->x(), tabev->y()); else { if(_pendown) { if(point.pressure()==0) { // Missed a release event _pendown = NOTDOWN; onPenUp(); } else { onPenMove(point); } } updateOutline(point); } _prevpoint = point; } } else if(event->type() == QEvent::TabletPress) { // Stylus touches the tablet surface QTabletEvent *tabev = static_cast<QTabletEvent*>(event); tabev->accept(); if(_dragbtndown) { startDrag(tabev->x(), tabev->y(), _dragbtndown); } else { if(_pendown == NOTDOWN) { const dpcore::Point point(mapToScene(tabev->pos()), tabev->pressure()); _pendown = TABLETDOWN; onPenDown(point, false); updateOutline(point); _prevpoint = point; } } } else if(event->type() == QEvent::TabletRelease) { // Stylus lifted QTabletEvent *tabev = static_cast<QTabletEvent*>(event); tabev->accept(); if(_isdragging) { stopDrag(); } else if(_pendown == TABLETDOWN) { dpcore::Point point(mapToScene(tabev->pos()), 0); updateOutline(point); _prevpoint = point; _pendown = NOTDOWN; onPenUp(); } } else { return QGraphicsView::viewportEvent(event); } return true; }
//! Handle mouse motion events void CanvasView::mouseMoveEvent(QMouseEvent *event) { /** @todo why do we sometimes get mouse events for tablet strokes? */ if(_pendown == TABLETDOWN) return; if(_pendown && event->buttons() == Qt::NoButton) { // In case we missed a mouse release mouseReleaseEvent(event); return; } if(_isdragging) { moveDrag(event->x(), event->y()); } else { paintcore::Point point = mapToScene(event->pos(), 1); updateOutline(point); if(!_prevpoint.intSame(point)) { if(_pendown) { _pointervelocity = point.distance(_prevpoint); _pointerdistance += _pointervelocity; point.setPressure(mapPressure(1.0, false)); onPenMove(point, event->buttons() & Qt::RightButton, event->modifiers() & Qt::ShiftModifier, event->modifiers() & Qt::AltModifier); } else if(_pointertracking && _scene->hasImage()) { emit pointerMoved(point); } _prevpoint = point; } } }
/** * Tablet events are handled here * @param event event info */ bool CanvasView::viewportEvent(QEvent *event) { if(event->type() == QEvent::Gesture) { gestureEvent(static_cast<QGestureEvent*>(event)); } else if(event->type() == QEvent::TabletMove && _enableTabletEvents) { // Stylus moved QTabletEvent *tabev = static_cast<QTabletEvent*>(event); tabev->accept(); paintcore::Point point = mapToScene(tabev->posF(), tabev->pressure()); updateOutline(point); if(!_prevpoint.intSame(point)) { if(_isdragging) moveDrag(tabev->x(), tabev->y()); else { if(_pendown) { _pointervelocity = point.distance(_prevpoint); _pointerdistance += _pointervelocity; point.setPressure(mapPressure(point.pressure(), true)); onPenMove(point, false, tabev->modifiers() & Qt::ShiftModifier, tabev->modifiers() & Qt::AltModifier); } } _prevpoint = point; } } else if(event->type() == QEvent::TabletPress && _enableTabletEvents) { // Stylus touches the tablet surface QTabletEvent *tabev = static_cast<QTabletEvent*>(event); tabev->accept(); if(_dragbtndown) { startDrag(tabev->x(), tabev->y(), _dragbtndown); } else { if(_pendown == NOTDOWN) { _pointerdistance = 0; _pointervelocity = 0; const paintcore::Point point = mapToScene(tabev->posF(), mapPressure(tabev->pressure(), true)); _specialpenmode = tabev->modifiers() & Qt::ControlModifier; /* note: modifiers doesn't seem to work, at least on Qt 5.2.0 */ _pendown = TABLETDOWN; onPenDown(point, false); updateOutline(point); _prevpoint = point; } } } else if(event->type() == QEvent::TabletRelease && _enableTabletEvents) { // Stylus lifted // Ignore this event: a mouseRelease event is also generated, so we let // the mouseRleaseEvent function handle this. } else { return QGraphicsView::viewportEvent(event); } return true; }
//! Handle mouse motion events void CanvasView::mouseMoveEvent(QMouseEvent *event) { /** @todo why do we sometimes get mouse events for tablet strokes? */ if(_pendown == TABLETDOWN) return; if(_pendown && event->buttons() == Qt::NoButton) { // In case we missed a mouse release mouseReleaseEvent(event); return; } if(_isdragging) { moveDrag(event->x(), event->y()); } else { const dpcore::Point point(mapToScene(event->pos()), 1.0); if(!_prevpoint.intSame(point)) { if(_pendown) onPenMove(point); updateOutline(point); _prevpoint = point; } } }