Widget may be deleting itself when closed (for example if
Qt::WA_DeleteOnClose
<qthelp://com.trolltech.qt.486/qdoc/qt.html#WidgetAttribute-enum> flag
is set ) which would be perfectly fine cool staff actually shows the widget
one or another way.
when
std::shared_ptr<Widget > temp( new Widget () );
does not make any sense unless widget is modal and exec() is called in the
same function.
On Fri, Jun 12, 2015 at 7:02 AM, Igor Mironchik <igor.mironc...@gmail.com>
wrote:
> And to avoid memory leak just give to the Widget the parent. And when
> parent will die he will delete your Widget. It's just as example...
>
> But to answer to your question more clearly we need to know some more
> details. Such as what widget is doing, when he should die, and so on...
>
>
> On 12.06.2015 16:57, Dmitry Volosnykh wrote:
>
> In your case the 'temp' object will be deleted upon quitting function
> foo(), so the signalTriggered() is never emitted. In previous version, it
> would have been living longer because of memory leak you mentioned.
>
> On Fri, Jun 12, 2015 at 4:52 PM, Berkay Elbir <berkayel...@gmail.com>
> wrote:
>
>>
>> Hello all;
>>
>> We recently joined a new project, which is full with idiom like: ,
>>
>> void foo(){
>> Widget* temp = new Widget;
>> connect(temp, &Widget::signalTriggerred,[this, temp ]()
>> {
>> do cool staff...
>> }}
>>
>> As you can see no delete nothing, I am afraid even user class "Widget" is
>> inherited QObject, this is still a leak. Does QT do something fancy to
>> prevent leek in case above?
>>
>> What I am planning to do:
>>
>> void foo {
>> std::shared_ptr<Widget > temp( new Widget () );
>> connect(temp.get(), &Widget::signalTriggerred,[this, temp] ()
>> {
>> do even cooler things...
>> }}
>>
>> Is there a problem with my apporach? (For example I didn't want to use
>> .get() but compiler errors forced me to use it).
>>
>> Thanks in advance,
>>
>> BE
>>
>>
>>
>>
>> _______________________________________________
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>> Interest@qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/interest
>>
>>
>
>
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