[PyQt] key capture

Phil Thompson phil at riverbankcomputing.com
Tue Jan 25 15:50:39 GMT 2011

On Tue, 25 Jan 2011 07:43:05 -0800, John Fabiani <johnf at jfcomputer.com>
> On Tuesday, January 25, 2011 07:19:17 am Phil Thompson wrote:
>> On Tue, 25 Jan 2011 07:12:30 -0800, John Fabiani <johnf at jfcomputer.com>
>> wrote:
>> > Hi,
>> > newbie question - is it possible to capture the 'F4' using SIGNAL for
>> > QLineEdit.  If so how?  Also where can I find a list of the available
>> > signals
>> > (events)?
>> Signals are not events.
>> If you can use a QLineEdit sub-class then reimplement keyPressEvent(),
>> otherwise install an event filter.
>> Phil
> Thanks for the quick response.  Reading the book "Rapid GUI programming
> with 
> Python and QT"  in the section "Signals and Slots" (page 127) the author

> starts the section by stating:
> "Every GUI library provides the details of events that take place ..."

I assume that it's using the term in its generic "something that happens"
sense, not the Qt-specific meaning.

> So I gathered that SIGNALS were events.   Apparently, I did not
> completely.  Could you take a little more time and explain why they are
> not.  
> There is more to read - chapters 10 and 11 are suppose to get deeper
> the 

I suggest you finish your reading then ask any questions you have left.

> Still would like to know where I can see a list of SIGNALS?

The documentation for a class lists the signals for that class.


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