How can I traverse all of the items in a QStandardItemModel

[jacek]

Pseudo code:

for i = rowCount() - 1 to 0:
   push index( i, 0 )
while stack not empty:
   pop idx from stack
   process idx
   if hasChildren( idx ):
      for i = rowCount( idx ) - 1 to 0:
         push index( i, 0, idx )

for i = rowCount() - 1 to 0:
   push index( i, 0 )
while stack not empty:
   pop idx from stack
   process idx
   if hasChildren( idx ):
      for i = rowCount( idx ) - 1 to 0:
         push index( i, 0, idx )

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(this code assumes that you keep items as rows and columns just represent their properties)

[patrik08]

Ok i found a way to build a dom tree .. from a QStandardItemModel

a static function to retry child item

static QList<QStandardItem*> childList( QStandardItem *qi )
{
    QStandardItemModel *pm = qi->model();
    QList<QStandardItem*> rList;
    QModelIndex in = qi->index();
    if (!in.isValid()) {
    return rList; 
    }
    if (qi->rowCount() == 0) {
    return rList;  
    }
    for (int e = 0; e < qi->rowCount(); ++e) {
        QModelIndex si = pm->index(e,qi->column(),in);
        QStandardItem *iz = pm->itemFromIndex(si);
        if (iz) {
           rList << iz; 
        }
    }
    return rList; 
}

static QList<QStandardItem*> childList( QStandardItem *qi )
{
    QStandardItemModel *pm = qi->model();
    QList<QStandardItem*> rList;
    QModelIndex in = qi->index();
    if (!in.isValid()) {
    return rList; 
    }
    if (qi->rowCount() == 0) {
    return rList;  
    }
    for (int e = 0; e < qi->rowCount(); ++e) {
        QModelIndex si = pm->index(e,qi->column(),in);
        QStandardItem *iz = pm->itemFromIndex(si);
        if (iz) {
           rList << iz; 
        }
    }
    return rList; 
}

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and a class to build a xml

void BookTree::subIterate()
{
    QStandardItemModel *pm = qobject_cast<QStandardItemModel *>(model());
    if (!pm) {
    return;
    }
    QStringList line;
    int rw = 0;
    int cw = 0;
    int ctot = 0;
    const int cools = pm->columnCount();
    const int rows = pm->rowCount();
    qDebug() << "-- iter ---------------------------------------------------------";
     for (int i = 0; i < cools; ++i) {
         const QString htxt = pm->headerData(i,Qt::Horizontal,Qt::DisplayRole).toString();
         const QString htxt1 = pm->headerData(i,Qt::Vertical,Qt::DisplayRole).toString();
         line << qMax(htxt,htxt1);
     }
     QList<QStandardItem*> list;
     for (int e = 0; e < rows; ++e) { 
         QStandardItem *ix_1 = pm->item(e,0);
         QStandardItem *ix_2 = pm->item(e,1);
         list.clear();
         list = childList(ix_1);
         ctot = list.size();
         int level = 0;
         qDebug() << "# lev." << level <<" line " << e << " txt " << ix_1->text() << "  child " << ctot;
         if (ctot !=0) {
 
                 level++;
                 foreach (QStandardItem *ix,list) {
                 list.clear();
                 ctot = 0;
                 list = childList(ix);
                 ctot = list.size();
                 qDebug() << "# lev." << level <<" line " << e << " txt " << ix->text() << "  child " << ctot; 
 
                 }
         }
     }
    qDebug() << "-- iter ---------------------------------------------------------";
}

void BookTree::subIterate()
{
    QStandardItemModel *pm = qobject_cast<QStandardItemModel *>(model());
    if (!pm) {
    return;
    }
    QStringList line;
    int rw = 0;
    int cw = 0;
    int ctot = 0;
    const int cools = pm->columnCount();
    const int rows = pm->rowCount();
    qDebug() << "-- iter ---------------------------------------------------------";
     for (int i = 0; i < cools; ++i) {
         const QString htxt = pm->headerData(i,Qt::Horizontal,Qt::DisplayRole).toString();
         const QString htxt1 = pm->headerData(i,Qt::Vertical,Qt::DisplayRole).toString();
         line << qMax(htxt,htxt1);
     }
     QList<QStandardItem*> list;
     for (int e = 0; e < rows; ++e) { 
         QStandardItem *ix_1 = pm->item(e,0);
         QStandardItem *ix_2 = pm->item(e,1);
         list.clear();
         list = childList(ix_1);
         ctot = list.size();
         int level = 0;
         qDebug() << "# lev." << level <<" line " << e << " txt " << ix_1->text() << "  child " << ctot;
         if (ctot !=0) {
             
                 level++;
                 foreach (QStandardItem *ix,list) {
                 list.clear();
                 ctot = 0;
                 list = childList(ix);
                 ctot = list.size();
                 qDebug() << "# lev." << level <<" line " << e << " txt " << ix->text() << "  child " << ctot; 
                     
                 }
         }
     }
    qDebug() << "-- iter ---------------------------------------------------------";
}

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now i must only transform the tree model -> flat like table to validate link...