Result recognize(QGesture *state, QObject *, QEvent *event)
{
TouchStatusGesture *ts = static_cast<TouchStatusGesture *>(state);
switch (event->type()) {
case QEvent::TouchBegin:
case QEvent::TouchUpdate:
ts->setHasTouchInput(true);
return QGestureRecognizer::TriggerGesture;
case QEvent::TouchEnd:
ts->setHasTouchInput(false);
return QGestureRecognizer::FinishGesture;
// native (mac only?) gestures are available starting from Qt 5.2
#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
case QEvent::NativeGesture:
{
QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
switch (ev->gestureType()) {
case Qt::EndNativeGesture:
ts->setHasTouchInput(false);
return QGestureRecognizer::FinishGesture;
default:
ts->setHasTouchInput(true);
return QGestureRecognizer::TriggerGesture;
}
}
#endif
default:
break;
}
return QGestureRecognizer::Ignore;
}
bool QG_GraphicView::event(QEvent *event) {
#if QT_VERSION >= 0x050200
if (event->type() == QEvent::NativeGesture) {
QNativeGestureEvent *nge = static_cast<QNativeGestureEvent *>(event);
if (nge->gestureType() == Qt::ZoomNativeGesture) {
double v = nge->value();
RS2::ZoomDirection direction;
double factor;
if (v < 0) {
direction = RS2::Out;
factor = 1-v;
} else {
direction = RS2::In;
factor = 1+v;
}
// It seems the NativeGestureEvent::pos() incorrectly reports global coordinates
QPoint g = mapFromGlobal(nge->globalPos());
RS_Vector mouse = toGraph(RS_Vector(g.x(), g.y()));
setCurrentAction(new RS_ActionZoomIn(*container, *this, direction,
RS2::Both, mouse, factor));
}
return true;
}
#endif
return QWidget::event(event);
}
bool MyGL::event(QEvent *e) {
//Call parent method
QWidget::event(e);
//Do Not Delete This^
//Zoom
if (e->type() == QEvent::NativeGesture) {
QNativeGestureEvent* native = static_cast<QNativeGestureEvent*>(e);
if (native->gestureType() == Qt::ZoomNativeGesture) {
double amount = native->value()*100;
double total = camera.getZoom() - amount;
camera.setZoom(total >= 0.5 && total <= 150 ? camera.getZoom()-amount : camera.getZoom());
resizeGL();
paintGL();
}
}
//Rotate & Pan
if (e->type() == QEvent::MouseMove) {
QMouseEvent* mouse = static_cast<QMouseEvent*>(e);
if(mouse->buttons() == Qt::LeftButton) {
//If Shift is held Down
if (mouse->modifiers() == Qt::ShiftModifier) {
//If mouseInitPosition is unitialized (10000), set the current mouse position as it's initial
if (mouseInitPosition.x() == 10000) {
mouseInitPosition = mouse->pos();
}
//Change in X or Y is the mouse's new - old positions
float delX = (mouse->pos().x()-mouseInitPosition.x());
delX /= 2.0; //<---- For aesthetics
float delY = (mouse->pos().y()-mouseInitPosition.y());
delY /= 2.0; //<---- For aesthetics
//The new Position is a result of moving the camera along it's local up axis delY units.
//To reach this we normalize the up vector, multiply it by delY, then add that to camera.
glm::vec3 newPos = camera.getPosition() - (glm::normalize(camera.getUp()) * delY);
newPos += (glm::normalize(camera.getLeft()) * delX);
//Same movement for target
glm::vec3 newTarget = camera.getTarget() - (glm::normalize(camera.getUp()) * delY);
newTarget += (glm::normalize(camera.getLeft()) * delX);
camera.setPosition(newPos);
camera.setTarget(newTarget);
//This is so the next time the mouse move event happens,
//we calculate the change in mouse positions using this
//as the initial position.
mouseInitPosition = mouse->pos();//Reset Mouse Increment
} else { //If no shift, then rotate
if (mouseInitPosition.x() == 10000) {
mouseInitPosition = mouse->pos();
}
//To avoid weird flipping bug past Phi = 180, we limit Phi
float newPhi = camera.getPhi() - (mouse->pos().y()-mouseInitPosition.y());
if (newPhi < 180 && newPhi > 0) {
camera.setPhi(newPhi);
}
//Just in case user rotates in circles a lot of time
//we make theta loop from 0-360.
float newTheta = camera.getTheta() + (mouse->pos().x()-mouseInitPosition.x());
if (newTheta > 360) {
camera.setTheta(newTheta - 360);
} else {
camera.setTheta(newTheta);
}
mouseInitPosition = mouse->pos();
}
resizeGL();
paintGL();
}
} else if (e->type() == QEvent::MouseButtonRelease) {
//When user releases the mouse, 'uninitialze the mouseInitPosition'
mouseInitPosition = QPoint(10000,10000);
}
return e->isAccepted();
}