QAbstractItemDelegate and editing

Anticross

This delegate is using by more then one item View sub class. I can't even imagine how many times it will be used in project in feature and by how many people, because it not so small. So I need some local solution in my delegate or in AItemDelegate class. Is there any other ideas ?

goetz

The delegate does not catch widget state changes. So I see no better solution. You might create a central subclass of the needed item view/item widgets and implement endEdit there, to ease the use of the method.

Anticross

Thanks for answer. So this will take a little bit more work than I expect.

Anticross

And one more question: which signal I need to connect ? For example in QTreeView ? I can't find appropriate signal. Or maybe it must be my own signal emitted from one of delegate functions ?

goetz

I mean some signals or events from the containing widget (hide, close, etc.). maybe focusOut on the item view too. Also, if you have, for example, a save button, it is likely that it is connected to some slot, you should call endEdit there too.

Anticross

There is one more simple solution that I find. In my delegate I need to add connect @ public: void setEditorData(QWidget * editor, const QModelIndex & index) const {
QComboBox * cb = static_cast<QComboBox *>(editor);
QString s = index.data(Qt::DisplayRole).toString();
int i = cb->findText(s);
cb->setCurrentIndex(i);

                connect(cb, SIGNAL(currentIndexChanged(int)), this, SLOT(onCurrentIndexChanged(int)));
            }@

And add a slot onCurrentIndexChanged : @public slots: void onCurrentIndexChanged(int index) {
QComboBox * cb = static_cast<QComboBox *>(sender());
emit commitData(cb);
emit closeEditor(cb);
}@
So it solved locally and works pretty well.

goetz

Be aware that this will work with your combo boxes, but not with default generated line edits or the like!

brianz

I had the exact same issue and the currentChanged trick worked very nicely.

Thanks for the tip!

maximus

Just want to thanks for this trick, I modified it a little bit so it works with every QWidget editor

1- In createEditor, connect a custom signal in your QWidget Editor to a custom slot in the Delegate
@QWidget *IntervalDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const

{
else if (index.column() == 3 ) {
CadenceEditor *editor = new CadenceEditor(parent);
connect (editor, SIGNAL(endEdit()), this, SLOT(closeWidgetEditor()) );
return editor;
}@

2- close the editor in the custom delegate slot :
@void IntervalDelegate::closeWidgetEditor() {

qDebug() << "CLOSE EDITOR NOW!";
QWidget *editor = qobject_cast<QWidget*>(sender());

emit commitData(editor);
emit closeEditor(editor);

}@

maximus

I can now close the editor with a custom "OK" button, show in this image:
https://www.dropbox.com/s/95agb2c38f9p354/customEditors.png

Problem is when I click the OK button, the click get propaged under it and it open another editor, how can I stop the click? I already have setAttribute(Qt::WA_NoMousePropagation); on my custom QWidget editor..

Thanks

maximus

I think it is the default behavior in a QTableView, when a cell editing is completed, the editor automatically move to the adjacent(right) cell.

Kind of like excel.
I need to find how to turn off this feature now :)