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I have an instance of a QListWidget in my applications MainWindow. Adding anything to it goes fine, using QListWidget->addItem(const QString&). However, every time I try and access the current selected items text using QListWidget->currentItem()->text(), it causes a segfault. This is on Gentoo Linux, using Qt 4.1 BTW. Is this a (known) bug, or am I making some horrible logic error?
Shouldn't it be QListWidget rather than QListWidgetItemQuote:
every time I try and access the current selected items text using QListWidgetItem->currentItem()->text()
Sorry, you're right. That's how it is in my program though, just made a mistake describing it here. Post edited for clarity.Quote:
Originally Posted by munna
You should always check the returned pointer as it can be 0 if there is no current item.
Maybe I should have been more specific - I check to see that QListWidget->currentRow() is not = -1 before I try and retrieve the text, since QListWidget->currentRow() returns -1 (int) if nothing is selected. And indeed, if there is no entry then the program doesn't segfault. It does segfault when there is a QListWidgetItem in the QListWidget. However, I AM calling the function from a QMenu entry - maybe it is a focus problem? Should I try setting the focus to the QListWidget before calling QListWidget->currentItem()->text()? I ask only because I am at work - I'll give it a shot when I get home. It isn't mentioned in the docs that it needs focus when being called though.
Yes, that's the problem. "Current item" is the item having the keyboard focus. See this post for explanation.
Yeah, as soon as I got home I tried it and that fixed it. Never thought my VBA/Access experiance of the last few weeks would have payed off :pQuote:
Originally Posted by jpn