Qt-interest Archive, May 2007
qtableview delete rows
Message 1 in thread
Dear All,
can someone clarify me a bit how it works when I want to delete a set of
unsorted rows from QTableView? I have items to be deleted, call deleteRows
with proper information. Inside model's deleteRows
I cann begin..endDeleteRows how it is supposed to be, however the table
doesn't get correctly updated. Firstly, the persistent editors I have in the
first column stay as they are even if I explicitly call
closePersistenceEditor. Seconds, except of the very last row the others are
not deleted from the table, they are just left blank.
shall I call something else to update the tableview?
thanksalot
d.
Message 2 in thread
Hi Dejfson,
I haven't used openPersistentEditor() or closePersistenteditor()
before...but basic QTableView removal is something like this..
QTableView *temp = static_cast<QTableView*>(currentWidget());
// retrieve QTableView object, I had more than one
QItemSelectionModel *selectionModel = temp->selectionModel();
// retrieve selectionModel, each QTableView object has one
QModelIndexList indexes = selectionModel->selectedRows();
// obtain selected items, if you have multiple selection enabled
QModelIndex index;
foreach(index, indexes) // loop through and remove them
{
int row = index.row();
table->removeRows(row, 1, QModelIndex());
}
Hope this helps,
K.
dejfson Belohrad wrote:
> Dear All,
> can someone clarify me a bit how it works when I want to delete a set
> of unsorted rows from QTableView? I have items to be deleted, call
> deleteRows with proper information. Inside model's deleteRows
> I cann begin..endDeleteRows how it is supposed to be, however the
> table doesn't get correctly updated. Firstly, the persistent editors I
> have in the first column stay as they are even if I explicitly call
> closePersistenceEditor. Seconds, except of the very last row the
> others are not deleted from the table, they are just left blank.
>
> shall I call something else to update the tableview?
>
> thanksalot
> d.
>
--
[ signature omitted ]
Message 3 in thread
Hi Dejfson,
I can't see what the problem is by looking at your current code. It
would be great if you could send more code...maybe parts of your
W_layerSettings (I think this your TableModel?) code..or something.
Thanks,
K.
P/s - You might want to copy your code to the list as well so more
people can help you out :)
dejfson wrote:
> Thanks for response. Honestly, i'm doing it in completely the same
> way. My implementation is following:
>
>
> this is my big-fancy delete button on one dialog box:
>
> void W_layerSettings::deleteLayer()
> {
> QModelIndexList selection = d_layersView->selectionModel()->selectedRows();
>
> QListIterator<QModelIndex> it (selection);
> it.toBack();
> while (
> it.hasPrevious())
> {
> const QModelIndex& idx = it.previous();
> D_objectLayers::layerData *dat = (D_objectLayers::layerData*)idx.internalPointer();
>
> // close persistent editor if layer is deletable:
>
> if (dat)
> if (dat->b_canBeDeleted)
> {
> d_layersView->closePersistentEditor(idx);
> if (qp_model->removeRows(idx.row(), 1, idx) == FALSE)
>
> {
> qp_statusBar->showMessage (tr ("Some layers could not be removed because they contain linked objects"), 5000);
> }
> }
> }
> }
>
>
> -------------- and this is implementation of removeRows in model:
>
> bool W_layerSettings_model::removeRows ( int row, int count, const QModelIndex &idx )
> {
> Q_ASSERT_X (count == 1, "W_layerSettings_model::removeRows", "multiple row removal not supported for the moment. Implement me!");
>
>
> D_objectLayers::layerData *currentLayer = (D_objectLayers::layerData *)idx.internalPointer();
> Q_ASSERT_X(currentLayer, "W_layerSettings_model::removeRows", "current layer not defined");
>
> beginRemoveRows ( QModelIndex (), row, row);
> bool result = qp_layers->deleteLayer (currentLayer);
> endRemoveRows();
> return result;
> }
>
>
>
> ------------------>
> but this behaves exactly how i wrote: it doesn't delete the lines in
> the tableview (it just lefts them empty) and it doesn't close
> persistent editor.
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[ signature omitted ]
