Re: [Kde-games-devel] Problem with signals and slots

Actually, there was a 2 way problem. I tried both and both failed.

Because if setupWidgets() is called first then m_gameTheme is invalid and if setupGame() is first then 
 emit signalLoadTheme(); is invalid as connection is not made yet. So, though not crash in this case, the slot will not be called.

Thanks for help
Mahfuz

On Sun, Jul 12, 2009 at 9:37 AM, Zeng Huan <zh.issac@xxxxxxxxx> wrote:

Hi,
Sorry for my typo.
you did not create your m_gameTheme before you make connection to it, just put setupGame() before setupWidgets()* can fix your problem. line23:24 in MainWindow.cpp

On Sun, Jul 12, 2009 at 10:35 AM, Zeng Huan <zh.issac@xxxxxxxxx> wrote:

Hi,

you did not create your m_gameTheme before you make connection to it, just put setupGame() before m_gameTheme can fix your problem. line23:24 in MainWindow.cpp

On Sun, Jul 12, 2009 at 10:17 AM, ahmmahfuz rubel <65mahfuz90@xxxxxxxxx> wrote:

I am having some problem when I tried to connect signals and slots of different classes. It was not a problem when I connected signals and slots within the same class(I even don't included the moc file!).

This is what I have done to connect two different classes:

I have a signal declared in MainWindow(inheritx kxmlGuiWindow) class named signalLoadTheme()
and a slot in ThemeManager class(inherits QSvgRenderer) named slotLoadTheme().

I created a instance of ThemeManager in MainWindow name m_gameTheme( ThemeManager* m_Theme)
and connected them in MainWindow using:

connect(this, SIGNAL( signalLoadTheme()), m_gameTheme, SLOT( slotLoadTheme() ));

I used Q_OBJECT in both of the classes at first (tried also including moc files).

But, this is not working, my program is crashing.

mahfuz@mahfuz-desktop:/usr/local/bin$ ./TestSignalSlot
KCrash: Application 'TestSignalSlot' crashing...
sock_file=/home/mahfuz/.kde/socket-mahfuz-desktop/kdeinit4__0
Warning: connect() failed: : No such file or directory
KCrash cannot reach kdeinit, launching directly.


The necessary parts of my program is attached here(Not full, it is big).

Please Help. Also, let me know, when and why including the moc file is must.

Thanks in advance.
Mahfuz

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--
Cheers,
Zeng Huan

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Cheers,
Zeng Huan

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