Qt-interest Archive, September 1998
How use keyPressEvent?
Message 1 in thread
Hi,
I have a simple question:
In a QDialog, I just want to enable the Enter-Key to simulate the Okay
button being pressed.
In the qdialog.html file I read that I could do it with
void QDialog::keyPressEvent ( QKeyEvent * e ) .
What do I have to use for "QKeyEvent *e"? I can`t manage to find it out
from the .html manuals.
Thanks,
Martin
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Message 2 in thread
On Tue, 1 Sep 1998, Martin Goebel wrote:
> void QDialog::keyPressEvent ( QKeyEvent * e ) .
>
> What do I have to use for "QKeyEvent *e"? I can`t manage to find it out
> from the .html manuals.
If you look in the src file for the showpic.cpp program, there is an
example of the keyPressEvent() near the bottom. It is checking for a 'q'
and a 'r' but you can change it to look for a return ACII value.
This may not be the best way to do it but I think it will work.
Keith
Message 3 in thread
Martin Goebel <x7046364@turing.ugr.es>
> void QDialog::keyPressEvent ( QKeyEvent * e ) .
>
> What do I have to use for "QKeyEvent *e"? I can`t manage to find it out
> from the .html manuals.
It's there. For example, look at the function you mention:
QDialog::keyPressEvent(). In http://www.troll.no/qt/qdialog.html
there is a little text about it, starting:
void QWidget::keyPressEvent ( QKeyEvent * e ) [virtual protected]
...
Now, you're wondering about the type of one of its arguments. If you
look, you'll see that the type name in that argument (QKeyEvent) is a
link. Click it, and you get to http://www.troll.no/qt/qkeyevent.html,
where you will find the information you need, including links to two
examples that use the class.
You can also see that QDialog::keyPressEvent() is a reimplementation
of QWidget::keyPressEvent(), the name of which is also a link. Click
that link, and you get much more info about keyPressEvent() in
general.
--Arnt
