//! [11]
void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
{
if (line != 0 && myMode == InsertLine) {
QList<QGraphicsItem *> startItems = items(line->line().p1());
if (startItems.count() && startItems.first() == line)
startItems.removeFirst();
QList<QGraphicsItem *> endItems = items(line->line().p2());
if (endItems.count() && endItems.first() == line)
endItems.removeFirst();
removeItem(line);
delete line;
//! [11] //! [12]
if (startItems.count() > 0 && endItems.count() > 0 &&
startItems.first()->type() == DiagramItem::Type &&
endItems.first()->type() == DiagramItem::Type &&
startItems.first() != endItems.first()) {
DiagramItem *startItem =
qgraphicsitem_cast<DiagramItem *>(startItems.first());
DiagramItem *endItem =
qgraphicsitem_cast<DiagramItem *>(endItems.first());
Arrow *arrow = new Arrow(startItem, endItem);
arrow->setColor(myLineColor);
startItem->addArrow(arrow);
endItem->addArrow(arrow);
arrow->setZValue(-1000.0);
addItem(arrow);
arrow->updatePosition();
}
}
//! [12] //! [13]
line = 0;
QGraphicsScene::mouseReleaseEvent(mouseEvent);
}
void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
{
if (line != 0 && myMode == InsertLine) {
QList<QGraphicsItem *> startItems = items(line->line().p1());
while(startItems.count() && startItems.first()->type() != DiagramItem::Type) {
startItems.removeFirst();
}
QList<QGraphicsItem *> endItems = items(line->line().p2());
while(endItems.count() && endItems.first()->type() != DiagramItem::Type) {
endItems.removeFirst();
}
removeItem(line);
delete line;
if (startItems.count() > 0 && endItems.count() > 0)
if(startItems.first()->type() == DiagramItem::Type &&
endItems.first()->type() == DiagramItem::Type &&
startItems.first() != endItems.first()) {
DiagramItem *startItem =
qgraphicsitem_cast<DiagramItem *>(startItems.first());
DiagramItem *endItem =
qgraphicsitem_cast<DiagramItem *>(endItems.first());
if(startItem->diagramType()!=endItem->diagramType()) {
Arrow *arrow = new Arrow(startItem, endItem, myItemMenu);
if(!startItem->haveSuchArrow(arrow)) {
arrow->setColor(myLineColor);
startItem->addArrow(arrow);
endItem->addArrow(arrow);
arrow->setZValue(-1000);
addItem(arrow);
arrow->updatePosition();
}
}
}
}
line = 0;
QGraphicsScene::mouseReleaseEvent(mouseEvent);
}