Qt-interest Archive, August 2006
QKeyEvent::key() for numerical keys
Message 1 in thread
Dear List,
In a keyPressEvent handler for a QWidget, I was trying to check for number
keys via
( e->key() >= Qt::Key_0 ) && ( e->key() <= Qt::Key_9 )
but that was not ever returning TRUE. So I put in this statement:
qDebug( "keyPressEvent( %d ), with Key_0==%d and Key_9==%d",
e->key(), Qt::Key_0, Qt::Key_9 );
and when I press number keys, I get debug output like this:
keyPressEvent( 1 ), with Key_0==48 and Key_9==57
keyPressEvent( 2 ), with Key_0==48 and Key_9==57
keyPressEvent( 3 ), with Key_0==48 and Key_9==57
keyPressEvent( 4 ), with Key_0==48 and Key_9==57
keyPressEvent( 5 ), with Key_0==48 and Key_9==57
Why is number key 1 generating a key event with e->key() == 1 instead of
e->key() == Qt::Key_1 == 49? Anyone else hit this problem? Am I doing
something wrong or have I found a Qt bug (Qt 4.1.4 on Mac OS 10.4.7)?
Nathan
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Message 2 in thread
As an update, upon successfully completing my WinXP build, I find that this
issue only happens on the Mac. The WinXP version seems to get the key event
numbers you'd expect (0 gives Qt::Key_0, not 0).
Since no one has responded, I guess I'll file a bug report.
Nathan
On 8/1/06 10:18 AM, "Nathan Carter" <ncarter@xxxxxxxxxxx> wrote:
>
> Dear List,
>
> In a keyPressEvent handler for a QWidget, I was trying to check for number
> keys via
>
> ( e->key() >= Qt::Key_0 ) && ( e->key() <= Qt::Key_9 )
>
> but that was not ever returning TRUE. So I put in this statement:
>
> qDebug( "keyPressEvent( %d ), with Key_0==%d and Key_9==%d",
> e->key(), Qt::Key_0, Qt::Key_9 );
>
> and when I press number keys, I get debug output like this:
>
> keyPressEvent( 1 ), with Key_0==48 and Key_9==57
> keyPressEvent( 2 ), with Key_0==48 and Key_9==57
> keyPressEvent( 3 ), with Key_0==48 and Key_9==57
> keyPressEvent( 4 ), with Key_0==48 and Key_9==57
> keyPressEvent( 5 ), with Key_0==48 and Key_9==57
>
> Why is number key 1 generating a key event with e->key() == 1 instead of
> e->key() == Qt::Key_1 == 49? Anyone else hit this problem? Am I doing
> something wrong or have I found a Qt bug (Qt 4.1.4 on Mac OS 10.4.7)?
>
> Nathan
>
>
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