How to convert a hierarchical print function into a hierarchical QStandardItemModel in C++ and Qt?



  • I have been trying for days to convert my print code into QStandardItemModel code, but I got stuck. I've created a row, which includes 4 attributes: attributeTag, attributeTagName, attributeVR, attributeLength.

    I need to convert the following print code into a QStandardItemModel:

    qDebug() << OFString(dicomObjectLevel, '>').c_str() << attributeTag << " " << attributeVR;
    

    Output print method:

     "(0040,a493)"   "CS"
     "(0040,a504)"   "SQ"
     "(fffe,e000)"   "na"
    > "(0008,0105)"   "CS"
    > "(0040,db00)"   "CS"
     "(0040,a730)"   "SQ"
     "(fffe,e000)"   "na"
    > "(0040,a010)"   "CS"
    > "(0040,a040)"   "CS"
    > "(0040,a043)"   "SQ"
    > "(fffe,e000)"   "na"
    >> "(0008,0100)"   "SH"
    >> "(0008,0102)"   "SH"
    >> "(0008,0104)"   "LO"
    > "(0040,a168)"   "SQ"
    > "(fffe,e000)"   "na"
    >> "(0008,0100)"   "SH"
    >> "(0008,0102)"   "SH"
    >> "(0008,0104)"   "LO"
    > "(0040,a730)"   "SQ"
    > "(fffe,e000)"   "na"
    >> "(0040,a010)"   "CS"
    >> "(0040,a040)"   "CS"
    >> "(0040,a043)"   "SQ"
    >> "(fffe,e000)"   "na"
    >>> "(0008,0100)"   "SH"
    >>> "(0008,0102)"   "SH"
    >>> "(0008,0104)"   "LO"
    >> "(0040,a168)"   "SQ"
    >> "(fffe,e000)"   "na"
    >>> "(0008,0100)"   "SH"
    >>> "(0008,0102)"   "SH"
    >>> "(0008,0104)"   "LO"
     "(fffe,e000)"   "na"
    > "(0040,a010)"   "CS"
    

    I tried many things but I cannot get it working correctly. What should I do in order to put all rows in their "correct" hiearchy? The arrow in front of each line in the output of the print function indicates the level. The level can be found in dicomObjectLevel

    My code:

    void MainController::printHierarchy(DcmObject* dataset)
    {
    	DcmStack stack;
    	QStandardItem* rootItem = m_model->invisibleRootItem();
    	while (dataset->nextObject(stack, OFTrue).good())
    	{
    		int dicomObjectLevel = (stack.card() / 2) - 1;
    		DcmObject* dicomObject = stack.top();
    		DcmTag dicomTag = dicomObject->getTag();
    		DcmVR dicomVR = dicomObject->getVR();
    
    		QString attributeTag = dicomTag.toString().c_str();
    		QString attributeTagName = dicomTag.getTagName();
    		QString attributeVR = dicomVR.getVRName();
    		QString attributeLength = QString::number(dicomObject->getLengthField());
    
    		QList<QStandardItem*> row = prepareRow(attributeTag, attributeTagName, attributeVR, attributeLength);
    
    		qDebug() << OFString(dicomObjectLevel, '>').c_str() << attributeTag << " " << attributeVR;
    	}
    }
    
    QList<QStandardItem *> MainController::prepareRow(const QString &elementTag, const QString &elementVR, const QString &elementLength, const QString &elementValue)
    {
        QList<QStandardItem *> rowItems;
        rowItems << new QStandardItem(elementTag);
        rowItems << new QStandardItem(elementVR);
        rowItems << new QStandardItem(elementLength);
    	rowItems << new QStandardItem(elementValue);
        return rowItems;
    }


  • Hi, welcome to Devnet.

    The things you have to understand with hierarchical model are:

    • everything can be done through items
    • use appendRows (or insertRows) to add one line containing several columns
    • create a hierarchy on the item that represents the first column with the above appendRows (for instance on "(fffe,e000)" but not on "SQ")
    • use appendRows (or insertRows) on top level instances only to your model (for instance "(0040,a493)" "CS", "(0040,a504)" "SQ", but not "(0008,0105)" "CS")

    To view your hierarchy, create a QTreeView and give it this model.

    If it's not clear enough, just let me know.



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