[Qt-interest] Retrieve a particular item from the QTreeView

[Sajjad]

Hello Constantin,

Thanks for the hint.

say for example i have to connect the click() signal to a slot. In my
previous post i specified how i did it.

connect(object1, SIGNAL(clicked()),object2, use_declared_slot());

As you have suggested, could you please any example hint either in the
QtDemos or in any other
free downloadable apps that have used selectionChanged(const
QItemSelection&,const QItemSelection&).


Thanks
Sajjad

On Fri, Mar 25, 2011 at 5:02 PM, Constantin Makshin <cmakshin at gmail.com>wrote:

> I don't know how exactly the pressed() signal of QAbstractItemView works, I
> used only clicked() signal of item views and signals emitted by selection
> models (particularly selectionChanged(QItemSelection, QItemSelection)). I
> think you should try them. And make sure you don't get any
> connection-related warning/error messages when the program is running.
>
> On Friday 25 March 2011 11:18:35 you wrote:
> > Hello Constantin,
> >
> > I gave the pressed signal a try and connected the signal to  a slot.
> > Initially the slot definition contains  a cout statement
> >
> >
> > to check if the pressed signal is actually captured. It is connected as
> > follows:
> >
> > ///////////////////////////////////////////////////////////////
> >
> >
> connect(m_h3dNodeTreeView,SIGNAL(pressed(QModelIndex)),this,SLOT(getH3DTreeItemData(QModelIndex)));
> >
> >
> > ///////////////////////////////////////////////////////////////
> >
> >
> > But withe the pressed signal i get not output. Any other hint?
> >
> >
> > Regards
> > Sajjad
> >
> > On Thu, Mar 24, 2011 at 12:24 AM, Constantin Makshin <cmakshin at gmail.com
> >wrote:
> >
> > > I can't say for sure what's the difference, but my guess is that
> pressed()
> > > is emitted when a mouse button is pressed and clicked() — when it's
> > > released.
> > >
> > > And you don't have to override mousePressEvent() as signals emitted by
> item
> > > views and selection models are more convenient, particularly because
> they
> > > provide index of the selected item.
> > >
> > > On Thursday 24 March 2011 01:08:39 Sajjad wrote:
> > > > Hello Constantin,
> > > >
> > > > Is there any difference between the signals pressed() and clicked().
> > > >
> > > > I have subclass the QTreeView as well. I was wondering if i should
> > > over-ride
> > > > the mousePressEvent() of QTreeView instead.
> > > >
> > > > Regards
> > > > Sajjad
> > > >
> > > > On Wed, Mar 23, 2011 at 10:44 PM, Constantin Makshin <
> cmakshin at gmail.com
> > > >wrote:
> > > >
> > > > > Take a look at QAbstractItemView::clicked(),
> > > QAbstractItemView::pressed()
> > > > > signals and selection model (returned by
> > > > > QAbstractItemView::selectionModel()) functions.
> > > > >
> > > > > On Thursday 24 March 2011 00:26:14 Sajjad wrote:
> > > > > > Hello forum,
> > > > > >
> > > > > > I have created a customized model by sub-classing the
> > > QAbstractItemModel
> > > > > > class and view the model in the QTreeView.
> > > > > >
> > > > > > Now when the user the click on a particular item in the tree view
> i
> > > want
> > > > > > retrieve the tree item from it.
> > > > > >
> > > > > > I have encapculated the QTreeView inside the customized widget.
> And
> > > then
> > > > > i
> > > > > > have over-ridden the mousePressEvent()
> > > > > >
> > > > > > {
> > > > > >      //I check for the left mouse press event and if not i return
> > > > > >
> > > > > >     //i need to look for the current clicked item - any way
> inside
> > > the
> > > > > > QTreeView to get it?
> > > > > > }
> > > > > >
> > > > > >
> > > > > >
> > > > > > Any hint to get it?
>
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