| Trolltech Home | Qt-interest Home | Recent Threads | All Threads | Author | Date | |
| All threads index page 1 | |
How do I tell whether a QObject is currently handling an event or not? I assumed that QObject would have some basic test, but I can't find one. Neither can I find a function in Q[Core]Application to say which object is currently processing an event. Is there any way to tell whether a given QObject (derivative) is in an event handler without re-writing every event handler in every object type? Keith **Please do not reply to me, reply to the list.**
Keith Esau wrote: >How do I tell whether a QObject is currently handling an event or not? I >assumed that QObject would have some basic test, but I can't find one. >Neither can I find a function in Q[Core]Application to say which object > is currently processing an event. > >Is there any way to tell whether a given QObject (derivative) is in an > event handler without re-writing every event handler in every object > type? There's no way, unless you modify Qt itself (QObject::event). Why do you want to know this? -- [ signature omitted ]
Attachment:
signature.asc
Description: This is a digitally signed message part.
I am getting the following warnings on Mac (where I cannot debug) but not on
Windows (where I can debug):
QObject: Do not delete object, 'unnamed', during its event handler!
I have a delete check in my objects and would like to add a check for it
happening in an event so I can find my bug.
Keith
**Please do not reply to me, reply to the list.**
On 05-02-2008 5:08 PM, "Thiago Macieira" wrote:
> Keith Esau wrote:
>> How do I tell whether a QObject is currently handling an event or not? I
>> assumed that QObject would have some basic test, but I can't find one.
>> Neither can I find a function in Q[Core]Application to say which object
>> is currently processing an event.
>>
>> Is there any way to tell whether a given QObject (derivative) is in an
>> event handler without re-writing every event handler in every object
>> type?
>
> There's no way, unless you modify Qt itself (QObject::event).
>
> Why do you want to know this?
--
[ signature omitted ]
BTW, I am using Qt 4.3.4 (latest stable version). Keith **Please do not reply to me, reply to the list.** On 05-02-2008 6:11 PM, "Keith Esau" wrote: > I am getting the following warnings on Mac (where I cannot debug) but not on > Windows (where I can debug): > > QObject: Do not delete object, 'unnamed', during its event handler! > > I have a delete check in my objects and would like to add a check for it > happening in an event so I can find my bug. > > Keith > **Please do not reply to me, reply to the list.** > > On 05-02-2008 5:08 PM, "Thiago Macieira" wrote: > >> Keith Esau wrote: >>> How do I tell whether a QObject is currently handling an event or not? I >>> assumed that QObject would have some basic test, but I can't find one. >>> Neither can I find a function in Q[Core]Application to say which object >>> is currently processing an event. >>> >>> Is there any way to tell whether a given QObject (derivative) is in an >>> event handler without re-writing every event handler in every object >>> type? >> >> There's no way, unless you modify Qt itself (QObject::event). >> >> Why do you want to know this? -- [ signature omitted ]
Keith Esau wrote: >BTW, I am using Qt 4.3.4 (latest stable version). No, you're not :-) This warning was added in Qt 4.4.0, so you can't be getting it in 4.3.4. And to find out where your bug is, put a breakpoint in that message (QObject::~QObject, at the end, src/corelib/kernel/qobject.cpp, more or less at line 870). When it hits, climb up one stack frame and you'll see where you deleted an object inside the event handler. >On 05-02-2008 6:11 PM, "Keith Esau" wrote: >> I am getting the following warnings on Mac (where I cannot debug) but >> not on Windows (where I can debug): >> >> QObject: Do not delete object, 'unnamed', during its event >> handler! >> >> I have a delete check in my objects and would like to add a check for >> it happening in an event so I can find my bug. -- [ signature omitted ]
Attachment:
signature.asc
Description: This is a digitally signed message part.