QTreeView slot on selection change
-
Hiho everybody,
I want to connect a QTreeView to a slot, so that I can call a function every time I click on a row of this treeview.
The problem is that it doesn't work and I dont know why.
Here is what I have:
@QStandardItemModel* model = new QStandardItemModel(frame);
QStandardItem* terrain = new QStandardItem(QIcon("../media/icon_crosshairs16x16bw1.gif"), "Terrain");
QStandardItem* ground = new QStandardItem(QIcon("../media/icon_crosshairs16x16bw1.gif"), "Ground");
QStandardItem* water = new QStandardItem(QIcon("../media/icon_crosshairs16x16bw1.gif"), "Water");
//some more items
terrain->setFlags(terrain->flags() & ~Qt::ItemIsEditable);
ground->setFlags(ground->flags() & ~Qt::ItemIsEditable);
water->setFlags(water->flags() & ~Qt::ItemIsEditable); //to prevent the user from modifying the text of the selectionmodel->appendRow(terrain);
terrain->appendRow(ground);
terrain->appendRow(water);QTreeView * treeView = new QTreeView(frame);
treeView->setModel(model);
@I dont know if that is the right way to create an expandable treeview but at least this works :)
And now the part where I think the problem is:
@QObject::connect(treeView->selectionModel(), SIGNAL(itemChanged ( QStandardItem * item )), MainWindow, SLOT(slot_selectionChanged()));@I hope somebody can help be.
Thanks in advance and best regards,
Ritschratsch -
According to this page: http://qt-project.org/doc/qt-5.0/qtcore/qitemselectionmodel.html QItemSelectionModel doesn't have a signal called "itemChanged"... use currentChanged instead
-
Hi Mr.Universe,
thank you for your answer, I just tried it, but without success :(
slot_selectionChanged() is not called -
are you sure you just didn't rename you signal in your code to currentChanged. The correct connect statement should look like this:
@
QObject::connect(treeView->selectionModel(), SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)), MainWindow, SLOT(slot_selectionChanged()));
@When your connected slot isn't called by the signal you can also check the console for a meaningful error message in case the connection couldn't be made.
