is it possible to get current item selected from itemClicked(QmodelIndex temp)

[ChrisW67]

Qt::CheckState state = static_cast<Qt::CheckState>(index.data(Qt::CheckStateRole).toInt());
switch (state) {
  case Qt::Checked: 
    // do stuff
    break;
  case Qt::Unchecked: 
    // do other stuff
    break;
  case Qt::PartiallyChecked: 
    // you might have these too
    break;
}

Qt::CheckState state = static_cast<Qt::CheckState>(index.data(Qt::CheckStateRole).toInt());
switch (state) {
  case Qt::Checked: 
    // do stuff
    break;
  case Qt::Unchecked: 
    // do other stuff
    break;
  case Qt::PartiallyChecked: 
    // you might have these too
    break;
}

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This only tells you the check state of the item the user clicked on, not any others in the tree. If you want the check state of everything in the tree then you need to iterate over the entire tree to look at each.