Qt-interest Archive, May 2008
Click-Through-Widget?
Message 1 in thread
Is there a way to make a widget "click-through"?
Meaning mouseclicks should be handled by the underlying widgets (as if
the widget were hidden).
I thought this must be simple, but can't come up with a solution.
Cheers,
Peter
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Message 2 in thread
You should be able to reimplement the mouse event handler methods and just
call QEvent::ignore() on all of the events that come in. This should cause
the event loop code to pass it up the widget stack.
Tom
On Mon, May 5, 2008 at 10:24 AM, Peter Prade <prade@xxxxxxxxxxx> wrote:
> Is there a way to make a widget "click-through"?
> Meaning mouseclicks should be handled by the underlying widgets (as if
> the widget were hidden).
> I thought this must be simple, but can't come up with a solution.
>
> Cheers,
> Peter
>
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Message 3 in thread
I've tried this, it doesn't work.
From the QEvent::ignore docs:
"Clearing the accept parameter indicates that the event receiver does not want the event. Unwanted events might be propgated to the parent widget."
The problem is, i would want the underlying siblings to process the event, not the parent.
Any non-rectangular widget should have the same problem - that it ends up eating all mouse events of the rectangular bounding box.
Does anyone have a solution for this?
Cheers,
Peter
> -----Ursprüngliche Nachricht-----
> Von: Tom Panning [mailto:lurchvt@xxxxxxxxx]
> Gesendet: Montag, 5. Mai 2008 16:47
> An: TrolltechInterest
> Betreff: Re: Click-Through-Widget?
>
> You should be able to reimplement the mouse event handler
> methods and just call QEvent::ignore() on all of the events
> that come in. This should cause the event loop code to pass
> it up the widget stack.
>
> Tom
>
>
> On Mon, May 5, 2008 at 10:24 AM, Peter Prade
> <prade@xxxxxxxxxxx> wrote:
>
>
> Is there a way to make a widget "click-through"?
> Meaning mouseclicks should be handled by the underlying
> widgets (as if
> the widget were hidden).
> I thought this must be simple, but can't come up with a
> solution.
>
> Cheers,
> Peter
>
> --
> To unsubscribe - send a mail to
> qt-interest-request@xxxxxxxxxxxxx with "unsubscribe" in the
> subject or the body.
> List archive and information:
> http://lists.trolltech.com/qt-interest/
>
>
>
>
>
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Message 4 in thread
Answering myself, for the archive:
I've had a closer look at the QRubberband widget (which is
click-through), and saw this line in its c'tor:
setAttribute(Qt::WA_TransparentForMouseEvents);
This window attribute is obviously undocumented, but it seems to do what
i want.
I've set it for my widget - and voila - my widget is now click-through.
Handle with care, there are some unsolved issues with this attribute:
http://trolltech.com/developer/task-tracker/index_html?searchstr=Transpa
rentForMouseEvents+&method=advsearch&bugs=on&sugs=on
Cheers,
Peter
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