How to know wich item is clicked QTreeWidget

[^NyAw^]

Hi,

Then you should seriously consider saying goodbye to QTreeWidget and switching to model based approach. You should wrap the internal structure into QAbstractItemModel instead of replicating it to another structure.

Wrap the internal structure to a model is to get a model and my structure in parallel?

By the way, does the internal structure of yours have any kind of identifier numbers or something like that?

Yes, I have LinkedLists that have internal nodes with uniques ID for each node.

Really I don't know wich is the best solution because my internal structure is handcoded (I had coded linkedLists, nodes, ... manually because it was done before I discovered Qt).

Thanks,

[jpn]

Wrap the internal structure to a model is to get a model and my structure in parallel?

QAbstractItemModel subclass would itself keep no data at all. It would be a plain interface for to your internal data. That's how Qt's view classes would be able to represent your internal data without need of copying the internal data to another structure, QTreeWidgetItems in your case.

Yes, I have LinkedLists that have internal nodes with uniques ID for each node.

Really I don't know wich is the best solution because my internal structure is handcoded (I had coded linkedLists, nodes, ... manually because it was done before I discovered Qt).

So basically you could mark each QTreeWidgetItem with corresponding identifier:

int id = ... // id of the corresponding item in the internal data structure
item->setData(0, Qt::UserRole, id);

int id = ... // id of the corresponding item in the internal data structure
item->setData(0, Qt::UserRole, id);

To copy to clipboard, switch view to plain text mode 

And once you react to clicked-signal you could ask for the identifier:

int id = item->data(0, Qt::UserRole).toInt();
... // find the corresponding item in the internal data structure with help of id

int id = item->data(0, Qt::UserRole).toInt();
... // find the corresponding item in the internal data structure with help of id

To copy to clipboard, switch view to plain text mode 

Roles starting from Qt::UserRole and upwards can be used for application specific things. QTreeWidgetItem will be able to store them, but will of course use them for nothing by itself.

[^NyAw^]

Hi,

Hey jpn! It's so easy now!

I just tell the item wich kind of item is, and when one is clicked, if it represents a node into a linkedList, I can tell the item parent wich position the item stays.

Thanks for all that have replied and helped me, maybe I will ask some other questions,