Use of same widget for display and edit in model-view

[d_stranz]

I believe you can use Qt::CheckStateRole and Qt::ItemIsUserCheckable flags to display and edit the check box without using a delegate. For the line edit, you can probably cache a pixmap of a QLineEdit containing the cell text and bitblt that in the paint event. This will take some trickery - the delegate isn't visible until the item is edited, so you will need to make a dummy QLineEdit, paint it, and cache it when you initially fill the table and repaint it when the table is resized or changed.

But from a usability point of view, wouldn't it be very confusing to a user if every cell in a table looked like it was being edited all the time? You would have to pay very close attention to where the input cursor was in order to know which cell you were editing. This is not a very intuitive interface, in my opinion.

[wysota]

I believe you can use Qt::CheckStateRole and Qt::ItemIsUserCheckable flags to display and edit the check box without using a delegate.

It's quite the opposite. It is the delegate that draws the box. There is no real checkbox widget there.

For the line edit, you can probably cache a pixmap of a QLineEdit containing the cell text and bitblt that in the paint event.

You don't need to cache anything. There is an API for this.

[d_stranz]

It's quite the opposite. It is the delegate that draws the box. There is no real checkbox widget there.

But you (the application writer) do not need to create an explicit checkbox delegate in order to have an editable checkbox appear in a table, isn't that correct? It is something the framework takes care of for you when you set the appropriate flags. That's what I was getting at.

You don't need to cache anything. There is an API for this.

Through QStyle? Or through QStyledItemDelegate or a subclass? Can you point to an example?

Thanks.

[wysota]

But you (the application writer) do not need to create an explicit checkbox delegate in order to have an editable checkbox appear in a table, isn't that correct?

There is already a delegate setup for you when you create a view.

Through QStyle? Or through QStyledItemDelegate or a subclass? Can you point to an example?

style()->drawControl(...); // or similar

style()->drawControl(...); // or similar

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