How to use QTreeView in QComboBox?

[Tamara]

I try to do something like this (original code was written in Python, so may be it has some syntax errors):

QTreeView *tvGroups = new QTreeView()
MyModel *groupModel = new MyModel()
cb->setView(&tvGroups)
cb->setModel(&groupModel)   
cb->setModelColumn(0)

QTreeView *tvGroups = new QTreeView()
MyModel *groupModel = new MyModel()
cb->setView(&tvGroups)
cb->setModel(&groupModel)   
cb->setModelColumn(0)

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cb is QComboBox.
After it usual integer combobox indexes become very strange.
In function which is connected to signal setCurrentIndex(int index) I print index and see that it has value -1 for items group2 and something_else, and 0 for others in the tree example below.
tree has such items:

All 
  group1
    group1.1
    group1.2
  group2
  something_else

All 
  group1
    group1.1
    group1.2
  group2
  something_else

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What is wrong?

[Sid]

You need to set the model first on the treeview.
treeview->setModel(model)
and then tell the combobox to use that model.

Or you can just use QTreeWidget directly using default model :

QTreeWidget *tree = new QTreeWidget();
cb->setModel( tree->model());
cb->setView ( tree);
 
add a few items (QTreeWidgetItem) to you tree and see if that works for you

QTreeWidget *tree = new QTreeWidget();
cb->setModel( tree->model());
cb->setView ( tree);

add a few items (QTreeWidgetItem) to you tree and see if that works for you

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Sid

[dblevitan]

I am also trying to use a QTreeWidget inside of a QComboBox (although using PyQt). I did what was suggested (although in my case, I subclass QComboBox), but my issue is that when I click on the combo box, it opens up with only one line that is not scrollable except using the mouse wheel. Clicking on any of the other entries results in the first entry being displayed or no entry being displayed.

Any idea on how to fix this?

Thanks.