//===============================================================
bool MouseElementDeleter::eventFilter(QObject *widget, QEvent *e) {
QMouseEvent *qMouseEv = (QMouseEvent *) e;
if(qMouseEv != NULL) {
node tmpNode;
edge tmpEdge;
ElementType type;
GlMainWidget *glMainWidget = (GlMainWidget *) widget;
if(e->type() == QEvent::MouseMove) {
if (glMainWidget->doSelect(qMouseEv->x(), qMouseEv->y(), type, tmpNode, tmpEdge)) {
glMainWidget->setCursor(QCursor(QPixmap(":/i_del.png")));
}
else {
glMainWidget->setCursor(Qt::ArrowCursor);
}
return false;
}
else if (e->type() == QEvent::MouseButtonPress && qMouseEv->button()==Qt::LeftButton) {
if (glMainWidget->doSelect(qMouseEv->x(), qMouseEv->y(), type, tmpNode, tmpEdge)) {
Observable::holdObservers();
Graph* graph = glMainWidget->getGraph();
// allow to undo
graph->push();
switch(type) {
case NODE:
graph->delNode(tmpNode);
break;
case EDGE:
graph->delEdge(tmpEdge);
break;
}
glMainWidget->redraw();
Observable::unholdObservers();
return true;
}
}
}
return false;
}
