QPainterPath LineItem::rightMidGrip() const {
if (gripMode() == Move)
return QPainterPath();
QRectF bound = gripBoundingRect();
QRectF grip = QRectF(bound.topRight() - QPointF(sizeOfGrip().width(), 0), sizeOfGrip());
grip.moveCenter(QPointF(grip.center().x(), bound.center().y()));
QPainterPath path;
if (gripMode() == Resize || gripMode() == Scale)
path.addRect(grip);
else
path.addEllipse(grip);
return path;
}
void LabelItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
ViewItem::mouseMoveEvent(event);
if ((gripMode() == ViewItem::Resize) && (activeGrip() != NoGrip)) {
_resized = true;
}
}
QPainterPath LineItem::grips() const {
if (gripMode() == Move)
return QPainterPath();
QPainterPath grips;
grips.addPath(leftMidGrip());
grips.addPath(rightMidGrip());
return grips;
}
void LineItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
if (view()->viewMode() == View::Data) {
event->ignore();
return;
}
if (!dragStartPosition.isNull() && event->buttons() & Qt::LeftButton) {
if (view()->mouseMode() == View::Move) {
startDragging(event->widget(), dragStartPosition.toPoint());
return;
}
}
if (view()->mouseMode() == View::Default) {
if (gripMode() == ViewItem::Move || activeGrip() == NoGrip) {
view()->setMouseMode(View::Move);
view()->undoStack()->beginMacro(tr("Move"));
} else if (gripMode() == ViewItem::Resize) {
view()->setMouseMode(View::Resize);
view()->undoStack()->beginMacro(tr("Resize"));
}
}
if (activeGrip() == NoGrip)
return QGraphicsRectItem::mouseMoveEvent(event);
double width = 0;
double height = 0;
double theta = 0;
QPointF centerP;
QPointF P1, P2;
if (gripMode() == ViewItem::Resize) {
switch(activeGrip()) {
case RightMidGrip:
P1 = mapToParent(QPoint(rect().left(), rect().center().y()));
P2 = mapToParent(event->pos());
break;
case LeftMidGrip:
P1 = mapToParent(event->pos());
P2 = mapToParent(QPoint(rect().right(), rect().center().y()));
break;
default:
return;
}
centerP = (P1 + P2) * 0.5;
theta = atan2(P2.y() - P1.y(), P2.x() - P1.x());
height = rect().height();
double dx = P1.x() - P2.x();
double dy = P1.y() - P2.y();
width = sqrt(dx*dx + dy*dy)+1.0;
if (activeGrip() == RightMidGrip) {
setPos(P1);
setViewRect(0,-height*0.5,width,height);
} else if (activeGrip() == LeftMidGrip) {
setPos(P2);
setViewRect(-width, -height*0.5, width, height);
}
//setPos(centerP.x(), centerP.y());
//setViewRect(-width*0.5, -height*0.5, width, height);
QTransform transform;
transform.rotateRadians(theta);
setTransform(transform);
updateRelativeSize(true);
}
}
