Using QSortFilterProxyModel with QTableWidgets

Hello,

I'm creating a database program, which contains one QTableWidget "tableSongs" that displays the whole data of a database.

It has 6 columns: 4 of them contain numbers, one contains text string and the last one contains sets of chars like "1A", "1B", "2A", "32G" or "111E" - it consists of a number (1-3 digits) and one upcase letter.

What I want to do is to add sorting and filtering functionality - columns with numbers should be sorted using numbers' value, column with strings - alphabetically and the last one like that: "1A" < "1B" but "9Z" < "19Z".

I thought that QSortFilterProxyModel would be a good class to use here.
I created second QTableWidget "tableSource" but didn't placed in on the window. I'm inserting rows and adding items to tableSource and I want QSortFilterProxyModel to show them in tableSongs after doing the sorting and filtering. But I have problems with doing so. Here is my code:

Quote:

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QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
proxyModel->setSourceModel(tableSource.model());
tableSongs->setModel(proxyModel);

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But it doesn't work. How should I correct it?

You do not need to create a second view.

This is the basic schematic:

Code:

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+--------------+   +-----------------------+   +----------+
| Source model +---+ Proxy model (sorting) +---+ The view |
+--------------+   +-----------------------+   +----------+

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However, I think you'll need to create your own sorting routine as the items you want to sort are strings, and they sort differently than integers.

But is there as convenient solution basing on a model as using QTableWidget which has all of these "insert/removeRow", "clearContents" slots?

The sorting will be the next problem, but at the moment my problem is the communicate, which I receive after trying to compile:

Code:

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proxyModel = new QSortFilterProxyModel(this);
    proxyModel->setSourceModel(tableSource.model());
    ui.tableSongs->setModel(proxyModel);

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The communicate is as follows:

Quote:

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...src/gui/itemviews/qtablewidget.h:338: error: 'virtual void QTableWidget::setModel(QAbstractItemModel*)' is private

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To be accurate, my "tableSongs" is not pure QTableWidget - I have promoted it to "upgTableWidget" - QTableWidget subclass. Can it be the reason of the error?

Is there any reason why you won't use QTableView with a QStandardItemModel or any other model?

Instead of "tableSongs"?

Quote:

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Originally Posted by kremuwa

Instead of "tableSongs"?

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yes, because then you wouldn't have the problem with a private model handling. And beside model/view is the higher approach then using *Widget.