<![CDATA[QTreeWidget Delete Last Item]]>hi
when QTreeWidget just have 1 item & if i want delete the item application crash & when have more than 1 item work fine, this is my code :

ui->TreeWidget->takeTopLevelItem(currentItem);
]]>https://forum.qt.io/topic/69647/qtreewidget-delete-last-itemRSS for NodeWed, 05 Aug 2026 07:50:02 GMTTue, 26 Jul 2016 18:36:34 GMT60<![CDATA[Reply to QTreeWidget Delete Last Item on Wed, 27 Jul 2016 17:05:12 GMT]]>Maybe there is some side effect even that happens which is actually the source of the crash. For example, you might have a problem if you don't handle the signal itemSelectionChanged() properly (i.e. you don't expect a no-selection case).

I tried this without problems:

	while(d_machine_parameter_tree->topLevelItemCount())
	{
		d_machine_parameter_tree->takeTopLevelItem(0);
	}

Qt 5.6.0, OSX 10.10.5

Note: You should delete the returned widget otherwise it is a memory leak.

]]>https://forum.qt.io/post/339593https://forum.qt.io/post/339593Wed, 27 Jul 2016 17:05:12 GMT<![CDATA[Reply to QTreeWidget Delete Last Item on Wed, 27 Jul 2016 13:30:39 GMT]]>@SGaist Hi
No, i don't have stack trace & currentItem is valid even i test whit this code when i have only 1 item:

ui->TreeWidget->takeTopLevelItem(0);

and app crash

]]>https://forum.qt.io/post/339563https://forum.qt.io/post/339563Wed, 27 Jul 2016 13:30:39 GMT<![CDATA[Reply to QTreeWidget Delete Last Item on Tue, 26 Jul 2016 22:38:25 GMT]]>Hi,

Do you have a stack trace ?

Are you sure currentItem is valid ?

]]>https://forum.qt.io/post/339443https://forum.qt.io/post/339443Tue, 26 Jul 2016 22:38:25 GMT