[Qt-interest] finding on what widget i am clicking...

[Francesco Lamonica]

Thanks Tom, that was indeed what i needed, there was an empty QLabel
that was covering the one i was clicking on... never ever accept to
maintain someone else's code... :)

On Fri, Jun 5, 2009 at 2:11 PM, Tom Panning<lurchvt at gmail.com> wrote:
> You want to install an event filter on your application and output the
> widget associated with any MouseButtonPress events. This involves
> tying several pieces of Qt together, but it's not difficult (you just
> need to know which pieces).
>
> First, read up on event filters:
> http://doc.qtsoftware.com/4.5/qobject.html#installEventFilter
>
> As described in option #3 of the documentation on
> QApplication::notify()
> (http://doc.qtsoftware.com/4.5/qcoreapplication.html#notify), you want
> to install an event filter on your qApp (note that you're not going to
> do anything with QApplication::notify(), that's just where this
> technique is documented). Remember to return QObject::eventFilter() on
> all of the events, otherwise they won't be processed (see the event
> filter documentation again if you don't understand).
>
> In the event filter, you want to check for any QEvents of type
> MouseButtonPress. The QObject* that is passed into the event filter is
> the object (probably a QWidget) that the click was being sent to. If
> you do:
> qDebug() << objectPtr;
> then Qt will automagically output the type of the pointer (i.e.,
> whether its a QLabel or QPushButton). You need to #include <QtDebug>
> in order to use qDebug() as a stream like this.
>
> Hope that helps,
> Tom
>
> On Fri, Jun 5, 2009 at 6:33 AM, Francesco Lamonica
> <alienpenguin at gmail.com> wrote:
>> Hi all, i've got a weird problem...
>> I am inspecting some code with a window full of widgets (not created
>> with designer) all placed manually with move(), setGeometry() etc.
>> i have a label (placed at 10,0) on which i click and the mouse press
>> event is recognized only if y()>30.
>> If i move the label to (80,0) the click is recognized over all the
>> label so i thought there might be some other widget over it and tried
>> raise() as the last statement of the ctor but with no luck.
>>
>> What might it be? if it is indeed a widget (created or moved somewhere
>> else in the code flow) how can i find which one it is?
>> thanks a lot.
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