How to disconnect QxtGlobalShortcut?

cidhuang

As title.
I declare a class member,

@ QxtGlobalShortcut* shortcut @

then

@
shortcut = new QxtGlobalShortcut();
connect(shortcut, SIGNAL(activated()), this, SLOT(shortcutCallBack()));
shortcut->setShortcut(QKeySequence("Ctrl+Shift+F12"));
@

And when I want to disconnect it, access shortcut make application crash.
I can not delete shortcut, too. It crashes.

I need to reset the global shortcut, please help me.

Thanks,

Cid

SGaist

Hi,

Please don't multi-post your question.

With only that code it's not really clear why you would have a crash.

So a wild guess, are you sure shortcut is not a shadowed variable ?
When you delete/disconnect your shortcut, are you sure it's valid ?

SGaist

duplicate of http://qt-project.org/forums/viewthread/27574/

cidhuang

Sorry for multi-post.

Actually, the program crash at the first line of

@
if(shortcut)
delete shortcut;
@

This is what I mean access. Really strange.

Thanks,

Cid

SGaist

Again, making guesses:
You're not creating your shortcut in the class constructor, so the pointer value is an address to a random block of memory.

Initialize shortcut (and any other pointer class variable that are not allocated in the constructor) to 0

cidhuang

I do that in constructor.

@
shortcut = 0;
@

and then

@
shortcut = new QxtGlobalShortcut();
connect(shortcut, SIGNAL(activated()), this, SLOT(shortcutCallBack()));
shortcut->setShortcut(QKeySequence("Ctrl+Shift+F12"));
@

after construction, a UI event call a function, in that function is

@
if(shortcut)
delete shortcut;
@

It's really weird, so I post here to see if there is any other possibility.

Thanks,

Cid

SGaist

Hum...

Your function could be called several times and you didn't set shortcut to 0 after deleting it.

cidhuang

Good reminder.

Thank you SGaist.

Really appreciate.

Cid

SGaist

You're welcome !

Please update the thread's title to solved so other forum users may know that a solution has been found :)

cidhuang

QxtGlobalShortcut is good.

It's other problem.

Sorry to waste your time.

Cid

SGaist

Then run you application through a debugger, it should help you find the problem

No worry