/**
* 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 press events
void CanvasView::mousePressEvent(QMouseEvent *event)
{
/** @todo why do we sometimes get mouse events for tablet strokes? */
if(_pendown != NOTDOWN)
return;
if(event->button() == Qt::MidButton || _dragbtndown) {
ViewTransform mode;
if(_dragbtndown == DRAG_NOTRANSFORM) {
if((event->modifiers() & Qt::ControlModifier))
mode = DRAG_ZOOM;
else if((event->modifiers() & Qt::ShiftModifier))
mode = DRAG_QUICKADJUST1;
else
mode = DRAG_TRANSLATE;
} else
mode = _dragbtndown;
startDrag(event->x(), event->y(), mode);
} else if((event->button() == Qt::LeftButton || event->button() == Qt::RightButton) && _isdragging==DRAG_NOTRANSFORM) {
_pendown = MOUSEDOWN;
_pointerdistance = 0;
_pointervelocity = 0;
_specialpenmode = event->modifiers() & Qt::ControlModifier;
onPenDown(mapToScene(event->pos(), mapPressure(1.0, false)), event->button() == Qt::RightButton);
}
}
/**
* 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 press events
void CanvasView::mousePressEvent(QMouseEvent *event)
{
/** @todo why do we sometimes get mouse events for tablet strokes? */
if(_pendown != NOTDOWN)
return;
if(event->button() == Qt::MidButton || _dragbtndown) {
startDrag(event->x(), event->y(), _dragbtndown!=ROTATE?TRANSLATE:ROTATE);
} else if((event->button() == Qt::LeftButton || event->button() == Qt::RightButton) && _isdragging==NOTRANSFORM) {
_pendown = MOUSEDOWN;
onPenDown(dpcore::Point(mapToScene(event->pos()), 1.0), event->button() == Qt::RightButton);
}
}
