[Qt-interest] QTreeWidgetItemIterator weird behaviour

[Malyushytsky, Alex]

As I understand it QTreeWidgetItemIterator when constructed with

QTreeWidgetItemIterator::QTreeWidgetItemIterator(QTreeWidget *widget, IteratorFlags flags)
should visit items starting from the first child. Which children are visited is defined by the flag.
Default flag is to visit All children.

The problem is mostly likely created by refreshInfo which changes the tree.
Remove call to the refreshInfo and test that iterator visits all items.

Changes that refreshInfo introduces are probably lead to sorting.

You may try to disable sorting before obtaining iterator
and re - enable it after you stopped using it.

I am not an expert in PyQt, never used it, so I will use c++ which you might modify to PyQt:

tree->setSortingEnabled( false ); // disable sorting

          iterator = QTreeWidgetItemIterator(self.tree)
        while iterator.value():
            print str(iterator.value().text(self.columns["name"]))
            if len(str(iterator.value().text(self.columns["path"]))) > 0 and len(str(iterator.value().text(self.columns['owner']))) >0:
                print str(iterator.value().text(self.columns["name"]))
                user = str(iterator.value().text(self.columns['owner']))
                self.refreshInfo(iterator.value())


self.tree.setSortingEnabled( true ); // re-enable sorting

-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of NARCISO, Rui
Sent: Monday, October 19, 2009 2:51 AM
To: Qt Interest (E-mail)
Subject: [Qt-interest] QTreeWidgetItemIterator weird behaviour


Hi all

Is a QTreeWidgetItemIterator supposed to go trhough the items on a QTreeWidget by any specific order or is it completely random?

I ask this because the first value given by my iterator is not the first one on the list and after going through all the items it fails to give me the very first one !!!!

My code (sorry, it's PyQt but you should be able to read it)

          iterator = QTreeWidgetItemIterator(self.tree)
        while iterator.value():
            print str(iterator.value().text(self.columns["name"]))
            if len(str(iterator.value().text(self.columns["path"]))) > 0 and len(str(iterator.value().text(self.columns['owner']))) >0:
                print str(iterator.value().text(self.columns["name"]))
                user = str(iterator.value().text(self.columns['owner']))
                self.refreshInfo(iterator.value())

and

def refreshInfo(self, calculation):
            iterator = QTreeWidgetItemIterator(self.tree)
            while iterator.value():
                if calculation == iterator.value():
                    iterator.value().setText(self.columns["status"], "...")

from my architecture I need to do these steps as they are in these different functions.

Any advice?

Rui

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