Updating checkboxes in QTreeView programmatically

[Jeffb]

Hi All

I have a QTreeView with a custom model.
The behaviour I'm looking for is that a user can check or uncheck bottom level items (ie. items that have no children) and when all the siblings have been checked for a particular parent, the parent gets checked.

So far I have no problem with getting the correct bottom level items to check and uncheck but the parent won't update until either it is selected or the QTreeView loses focus.

The reimplemented code for the flags is:

else if (index.column() == columnHeadingsList.indexOf("Complete"))
        {
            if ((aNode->children).count() == 0)
            {
                flags |= Qt::ItemIsUserCheckable; 
            }
        }

else if (index.column() == columnHeadingsList.indexOf("Complete"))
        {
            if ((aNode->children).count() == 0)
            {
                flags |= Qt::ItemIsUserCheckable; 
            }
        }

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The code for data is:

else if (role == Qt::CheckStateRole)  
    {
        if (index.column() == columnHeadingsList.indexOf("Complete"))
        {
            if (aNode->getIsComplete())
                return Qt::Checked;
            else
                return Qt::Unchecked;
        }
    }

else if (role == Qt::CheckStateRole)  
    {
        if (index.column() == columnHeadingsList.indexOf("Complete"))
        {
            if (aNode->getIsComplete())
                return Qt::Checked;
            else
                return Qt::Unchecked;
        }
    }

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And the code for setData is:

else if (index.column() == columnHeadingsList.indexOf("Complete"))
            {
                if (role == Qt::CheckStateRole) 
                {                                 
                        // set this node's isComplete
                        aNode->setIsComplete(value.toBool());
 
                    // set parent node's isComplete depending on it's children being complete
                    JBModelRow* aParentNode = aNode->parent;
                    if (aParentNode)
                    {
                        bool aNodeComplete = true;
                        for (int i = 0; i < (aParentNode->children).count(); i++)
                        {
                            if (!aParentNode->children[i]->getIsComplete())
                            {
                                aNodeComplete = false;
                                i = (aParentNode->children).count();
                            }
                        }
                        aParentNode->setIsComplete(aNodeComplete);
 
                        QModelIndex parentIndex = createIndex(aParentNode->getRow(),
                                                              aParentNode->getCol(),
                                                              aParentNode);
 
                        emit dataChanged(parentIndex, parentIndex);
                    }
                }
            }

else if (index.column() == columnHeadingsList.indexOf("Complete"))
            {
                if (role == Qt::CheckStateRole) 
                {                                 
                        // set this node's isComplete
                        aNode->setIsComplete(value.toBool());

                    // set parent node's isComplete depending on it's children being complete
                    JBModelRow* aParentNode = aNode->parent;
                    if (aParentNode)
                    {
                        bool aNodeComplete = true;
                        for (int i = 0; i < (aParentNode->children).count(); i++)
                        {
                            if (!aParentNode->children[i]->getIsComplete())
                            {
                                aNodeComplete = false;
                                i = (aParentNode->children).count();
                            }
                        }
                        aParentNode->setIsComplete(aNodeComplete);

                        QModelIndex parentIndex = createIndex(aParentNode->getRow(),
                                                              aParentNode->getCol(),
                                                              aParentNode);
                        
                        emit dataChanged(parentIndex, parentIndex);
                    }
                }
            }

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Any help appreciated.

Jeff

[Jeffb]

Have worked out what was wrong.
I had the wrong column when creating the QModelIndex parentIndex. It should have been the index.col

Cheers
Jeff