[Qt-interest] show a widget without a main window

[knowledge seeker]

Its not that - "what can be done", I was just curious that the code
snippet had a memory leak or not, by just looking at it at one glance
(considering there are no code-tweaks occuring behind the scenes).

Or, shall I presume that Qt::WA_DeleteOnClose attribute is set-as-default ?

Regards,
Knowledge Seeker


On Thu, Mar 5, 2009 at 9:21 AM, Malyushytsky, Alex <alex at wai.com> wrote:
> QApplication can't be parent object for widget, cause it is not a widget.
>
> There is no difference in the memory management in the code when you have main window or you have any other widget shown instead.
>
> For example you can set Qt::WA_DeleteOnClose attribute with QWidget::setAttribute(), so widget will delete itself when closed or you can do it somewhere as a result of lastWindowClosed () or just allocate your widget on a stack.
>
> Hope this helps,
>    Alex
>
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Knowledge Seeker
> Sent: Wednesday, March 04, 2009 5:43 PM
> To: qt-interest at trolltech.com
> Subject: Re: [Qt-interest] show a widget without a main window
>
> Is not there a memory leak? there is no
> delete w;
> And also object 'w' is not linked to the parentobject - QApplication, so
> it cant be automatically deleted !!
>
>
> Regards,
> Knowledge Seeker
>
> Malyushytsky, Alex wrote:
>>
>> Most of Qt examples are not using main window. Example look like this:
>>
>> #include <QtGui>
>>
>> #include "myWidget.h"
>>
>> //! [main function]
>>
>> int main(int argc, char *argv[])
>>
>> {
>>
>> QApplication app(argc, argv);
>>
>> myWidget *w = new myWidget;
>>
>> w->show();
>>
>> return app.exec();
>>
>> }
>>
>> Regards
>>
>> Alex Malyushyutsky
>>
>> ------------------------------------------------------------------------
>>
>> *From:* qt-interest-bounces at trolltech.com
>> [mailto:qt-interest-bounces at trolltech.com] *On Behalf Of
>> *ri at eeda.denso.co.jp
>> *Sent:* Tuesday, March 03, 2009 8:56 PM
>> *To:* qt-interest at trolltech.com
>> *Subject:* [Qt-interest] show a widget without a main window
>>
>> Hi
>>
>> I would like to know that if it's possible to show a widget without a
>> main window.
>>
>> For example, I want to show a QTableWidget, but only a QTableWidget,
>>
>> not a QTableWidget inside a QMainWindow.
>>
>> Is it possible? if yes, any sample code?
>>
>> Thanks in advance!
>>
>> Shiniji,Mizuki
>>
>>
>>
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