<![CDATA[what does topLevelItem in QTreeWidget means?]]>what does topLevelItem in QTreeWidget means?
i read the doc, but still don't understand what it really mean...

]]>https://forum.qt.io/topic/52632/what-does-toplevelitem-in-qtreewidget-meansRSS for NodeTue, 18 Aug 2026 20:34:25 GMTFri, 27 Mar 2015 02:39:23 GMT60<![CDATA[Reply to what does topLevelItem in QTreeWidget means? on Fri, 27 Mar 2015 10:01:31 GMT]]>so u mean when i write like this: pRootItem = new QTreeWidgetItem(this);
pRootItem is just top_level_1, and not invisible_root...
why do Qt add an invisible_root here?
and what things will the top_level related API make easier?

]]>https://forum.qt.io/post/267222https://forum.qt.io/post/267222Fri, 27 Mar 2015 10:01:31 GMT<![CDATA[Reply to what does topLevelItem in QTreeWidget means? on Fri, 27 Mar 2015 05:10:58 GMT]]>Top level items in a QTreeWidget do not have parent items.
Take a look on the pictures in QTreeWidget description
The most left items on each image are the top level items.
Not sure if forum will show my drawing correctly

invisible_root
    top_level_1
            not_top_level_1
            not_top_level_2
    top_level_2
            not_top_level_1
            not_top_level_2

Invisible_root is not visible in QTreeWidget and is accessible by QTreeWidget::invisibleRootItem()

]]>https://forum.qt.io/post/267174https://forum.qt.io/post/267174Fri, 27 Mar 2015 05:10:58 GMT