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Qt-interest Archive, July 2007
QTreeView refresh

Message 1 in thread

I have a QTreeView with a model derived from a QAbstractItemModel.
I insert a new element in the QTreeView and I need to refresh the tree.
I try with update(), repaint() or to emit the dataChanged() SIGNAL, but
it don't runs.
Suggestions?

Thanks
Teo

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Message 2 in thread

On 7/2/07, Vincenzo Ferraro <vincenzo.ferraro@xxxxxxxxx> wrote:
>
> I have a QTreeView with a model derived from a QAbstractItemModel.
> I insert a new element in the QTreeView and I need to refresh the tree.
> I try with update(), repaint() or to emit the dataChanged() SIGNAL, but
> it don't runs.


You emitted rowsAboutToBeInserted() and rowsInserted() at the correct times,
right?

Tom
Message 3 in thread

I have a QTreeView with a model derived from a QAbstractItemModel.
I insert a new element in the QTreeView and I need to refresh the tree.
I try with update(), repaint() or to emit the dataChanged() SIGNAL, but 
it don't runs.
Suggestions?

Thanks
Teo

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Message 4 in thread

> I have a QTreeView with a model derived from a QAbstractItemModel.
> I insert a new element in the QTreeView and I need to refresh the tree.
> I try with update(), repaint() or to emit the dataChanged() SIGNAL, but 
> it don't runs.
> Suggestions?

Did you emit 

void rowsAboutToBeInserted ( const QModelIndex & parent, int start, int 
end )
void rowsAboutToBeRemoved ( const QModelIndex & parent, int start, int end 
)

when inserting new rows?

Regards,
Malte

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Message 5 in thread

Erm,

> void rowsAboutToBeRemoved ( const QModelIndex & parent, int start, int 
end 
> )

Of course I ment 

void rowsInserted ( const QModelIndex & parent, int start, int end )

for the second signal.

Copy-n-Paste is a very difficult task for me ;-)

Malte

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Message 6 in thread

I try but rowsInserted and rowsAboutToBeRemoved are private. In effect 
the class QAbstractItemModel
class QAbstractItemModel...
...
#if !defined(MOC_) && !defined(qdoc)
private: // can only be emitted by QAbstractItemModel
#endif
     void rowsAboutToBeInserted(const QModelIndex &parent, int first, 
int last);
     void rowsInserted(const QModelIndex &parent, int first, int last);
     void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int 
last);
     void rowsRemoved(const QModelIndex &parent, int first, int last);
     void columnsAboutToBeInserted(const QModelIndex &parent, int first, 
int last);
     void columnsInserted(const QModelIndex &parent, int first, int last);
     void columnsAboutToBeRemoved(const QModelIndex &parent, int first, ...

and I can't define MOC_ or qdoc.

So I can't call rowsInserted and rowsAboutToBeRemoved.

Thanks
Teo


Malte Witt wrote:
> Erm,
> 
> 
>>void rowsAboutToBeRemoved ( const QModelIndex & parent, int start, int 
> 
> end 
> 
>>)
> 
> 
> Of course I ment 
> 
> void rowsInserted ( const QModelIndex & parent, int start, int end )
> 
> for the second signal.
> 
> Copy-n-Paste is a very difficult task for me ;-)
> 
> Malte
> 
> --
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Message 7 in thread

> I try but rowsInserted and rowsAboutToBeRemoved are private. In effect 
> the class QAbstractItemModel

Ooops, I am terribly sorry (didn't have my morning-coffe yet when writing 
my first post).

Of course you have to call

beginInsertRows ( const QModelIndex & parent, int first, int last )

and corresponding

endInsertRows ()

which in turn will emit the mentioned signals for you :-)

Sorry - that was my fault.

Regards,

Malte

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