Connect(buttonOne, SIGNAL(clicked), this, SLOT(doSomething(double.))); @ This should work. But clicked will not pass any data to your slot, so the pointer will be dangling. Plus you probably put the connect statement in a wrong place: it should be shown earlier, not. The MOC generates the introspection code, but only if the slots keyword is defined. If you need to know which signals and slots are connected to a specific object at a certain point in time, you'll find QObject::dumpObjectInfo very helpful. Waar kan je casino try out pakket kopen.

Hi everybody.

I'm developing an application using Qt and I need some advices signals/slots related. I have a method that reads an XML file and extracts data from it, but the file must have the correct start tag to be readed (it must be valid). As there could be some not saved data in the form, I would like to clear the current data only when I'm sure the file to read is valid. I was reading about callbacks, but it gets a little tricky as the method I want to call is part of a class (and non static). I want to avoid wrappers as they look a bit dirty, so I thought signals/slots could do a good job (my current method for reading the file is static, but I could adapt it).

The documentation says 'When a signal is emitted, the slots connected to it are usually executed immediately' (I'm using direct connection), but that 'usually' makes me doubt. As the read method would insert data just after the signal is emitted, I need to be sure the clear slot associated to the signal is called before the code following the 'emit' keyword is executed. So my question is: Will the clear method be completed before the read method continues? (always).

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