QTableWidget problem

[MarkoSan]

Yes, you are wrong You need a custom delegate that will render the data fetched from a single item using different item roles (like the text, icon, etc. - your custom roles included).

So, I can use existing model classes, existing view classes and I only reimplement delegate class?

And to be honest, I'd do it completely differently. I'd have a table with three columns and simply span appropriate rows across all columns.

The problem is that this table must be wide as little as possible, because on 17" touch monitor I am very limited with its width. About 90% of desktop (from 17") there is a some operation window. But because your ideas helped me a lot, can you provide me some screenshot, what did you mean by quote?

[wysota]

So, I can use existing model classes, existing view classes and I only reimplement delegate class?

Yes, that's correct. QStandardItemModel has everything you might need.

The problem is that this table must be wide as little as possible, because on 17" touch monitor I am very limited with its width. About 90% of desktop (from 17") there is a some operation window. But because your ideas helped me a lot, can you provide me some screenshot, what did you mean by quote?

I don't have a screenshot. I meant to use QTableView::setSpan().

[MarkoSan]

But, which delegate should I use, QItemDelegate or QAbstractItemDelegate? At this moment, I am totaly confused ...

[wysota]

The former inherits the latter, thus the choice is yours. I'd go for QItemDelegate or even QStyledItemDelegate if you use a recent version of Qt.

[MarkoSan]

Will the result be as in first post?

P.S.:QStyledDelegate has no reference to known class, the link reports "object not found...".

[wysota]

Will the result be as in first post?

If you implement it correctly, then yes.

P.S.:QStyledDelegate has no reference to known class, the link reports "object not found...".

QStyledItemDelegate a Qt 4.4 class, so the reference won't be valid until 4.4.0 comes out.

[MarkoSan]

Ok, I try to set QTableWidget's item delegate using method setItemDelegate:

m_pShoppingCartTableWidget->setItemDelegate(m_pShoppingCartItemDelegate);    // sets delegate

m_pShoppingCartTableWidget->setItemDelegate(m_pShoppingCartItemDelegate);    // sets delegate

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In the last line of method, I get following error:

mingw32-make
mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory `C:/Documents and Settings/markofr/workspace/Client'
g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I"..\..\..\..\Qt\4.3.4\include\QtCore" -I"..\..\..\..\Qt\4.3.4\include\QtCore" -I"..\..\..\..\Qt\4.3.4\include\QtGui" -I"..\..\..\..\Qt\4.3.4\include\QtGui" -I"..\..\..\..\Qt\4.3.4\include\QtSql" -I"..\..\..\..\Qt\4.3.4\include\QtSql" -I"..\..\..\..\Qt\4.3.4\include" -I"c:\Qt\4.3.4\include\ActiveQt" -I"debug" -I"." -I"..\..\..\..\Qt\4.3.4\mkspecs\win32-g++" -o debug\COperationWIndow.o COperationWIndow.cpp
COperationWIndow.cpp: In member function `void COperationWIndow::createShoppingCartTableWidget()' :
COperationWIndow.cpp:336: error: `QAbstractItemDelegate' is an inaccessible base of `CShoppingCartDelegate'
mingw32-make[1]: *** [debug/COperationWIndow.o] Error 1
mingw32-make[1]: Leaving directory `C:/Documents and Settings/markofr/workspace/Client'
mingw32-make: *** [debug] Error 2

Why I cannot set my own delegate??

[jacek]

Why I cannot set my own delegate??

Make sure you use public inheritance in CShoppingCartDelegate.

[MarkoSan]

So, wysota, I've finnaly setup the table view. It is blank rectangle with white background. Now, like your hint was telling me, I used QModelIndex (not subclassed). How do I notify now the model about data source, which is QList of:

typedef struct
{
    qint16 iMerchandizeID;
    QString strMerchandizeName;
    qreal rMerchandizePrice;
    qint16 iMerchandizeQuantity;
    qreal rSubtotal;
} structOrder;

typedef struct
{
    qint16 iMerchandizeID;
    QString strMerchandizeName;
    qreal rMerchandizePrice;
    qint16 iMerchandizeQuantity;
    qreal rSubtotal;
} structOrder;

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And I've setup the view with:

m_pShoppingCartTableView->setShowGrid(false);
    m_pShoppingCartTableView->setModel(m_pShoppingCartModel);
    m_pShoppingCartTableView->setItemDelegate(m_pShoppingCartItemDelegate);
    m_pShoppingCartTableView->horizontalHeader()->hide();
    m_pShoppingCartTableView->verticalHeader()->hide();
    m_pShoppingCartTableView->horizontalHeader()->setMinimumSectionSize(1);
    m_pShoppingCartTableView->verticalHeader()->setMinimumSectionSize(1);

m_pShoppingCartTableView->setShowGrid(false);
    m_pShoppingCartTableView->setModel(m_pShoppingCartModel);
    m_pShoppingCartTableView->setItemDelegate(m_pShoppingCartItemDelegate);
    m_pShoppingCartTableView->horizontalHeader()->hide();
    m_pShoppingCartTableView->verticalHeader()->hide();
    m_pShoppingCartTableView->horizontalHeader()->setMinimumSectionSize(1);
    m_pShoppingCartTableView->verticalHeader()->setMinimumSectionSize(1);

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I've copied this chunk of code from pixelator example and I've reused it. If i comment the first line, I still do not get grid (for instance). Does this mean view is not setup properly?

[wysota]

It means the model is not set up incorrectly.

[MarkoSan]

Ok, but how do I make model aware of its QList datasource?

[wysota]

If you don't feel confident in creating your own model, use QStandardItemModel and reimplement QStandardItem by adding your structure to it. I think the docs explain how to do this.