[Qt-interest] Can an Qt Application contain 2 mainwindow?

[Samuel Gaist]

AFAIK There is no such thing as a close signal, but there is a closeEvent that you can use to emit a signal.

Take a look at:
http://doc.qt.nokia.com/4.7/qwidget.html#closeEvent

Hope this helps
Samuel

On 22 sept. 2011, at 16:01, Vincent Cai wrote:

> I met another low-level issue.
> Now I can open b window through menu of a window.
> But I don't know how to capture the close signal of b window.
> What signal will be issued when window based on QMainwindow closed?
> 
> 
> -----Original Message-----
> From: qt-interest-bounces+wcai=cypress.com at qt.nokia.com [mailto:qt-interest-bounces+wcai=cypress.com at qt.nokia.com] On Behalf Of Vincent Cai
> Sent: 2011年9月22日 18:10
> To: Samuel Gaist; Qt-interest
> Subject: Re: [Qt-interest] Can an Qt Application contain 2 mainwindow?
> 
> Thanks a lot.
> Great article, need more time to digest for me, a newbie. :)
> 
> The conclusion is: The Qt GUI must run in main thread, right?
> 
> -----Original Message-----
> From: qt-interest-bounces+wcai=cypress.com at qt.nokia.com [mailto:qt-interest-bounces+wcai=cypress.com at qt.nokia.com] On Behalf Of Samuel Gaist
> Sent: 2011年9月22日 17:53
> To: Qt-interest
> Subject: Re: [Qt-interest] Can an Qt Application contain 2 mainwindow?
> 
> Hi,
> 
> The answer lies here:
> http://doc.qt.nokia.com/4.8/thread-basics.html#gui-thread-and-worker-thread
> 
> Hope it helps
> Samuel
> 
> On 22 sept. 2011, at 11:46, Vincent Cai wrote:
> 
>> Thanks.
>> 
>> The error happens when I try to new b window in other thread.
>> 
>> #include "TSAUtility.h"
>> 
>> TSAUtility::TSAUtility(void) : QThread()
>> {
>>    DataUtt = NULL;
>> }
>> 
>> TSAUtility::~TSAUtility()
>> {
>>    this->terminate();
>>    this->wait();
>> 
>>    if(DataUtt)
>>    {
>>        delete DataUtt;
>>        DataUtt = NULL;
>>    }
>> 
>>    emit SignUttClose();
>> }
>> 
>> void TSAUtility::run()
>> {
>>    DataUtt = new DataUtility();//failed here
>> 
>>    DataUtt->show();
>>    while(true)
>>    {
>> 
>>    }
>> }
>> 
>> Do you know why?
>> 
>> -----Original Message-----
>> From: Konstantin Tokarev [mailto:annulen at yandex.ru]
>> Sent: 2011年9月22日 17:30
>> To: Vincent Cai
>> Cc: qt-interest at qt.nokia.com
>> Subject: Re: [Qt-interest] Can an Qt Application contain 2 mainwindow?
>> 
>> 22.09.2011, 13:28, "Vincent Cai" <wcai at cypress.com>:
>>> Dear all,
>>> 
>>>         I have and GUI application with is based on QMainwindow(a.ui).
>>> 
>>>         And I create the other *.ui which is also based on QMainwindow(b.ui).
>>> 
>>> When I try to open b window through menu of a window, it fail at initialization:
>>> 
>>>        DataUtility::DataUtility(QWidget*parent):
>>> 
>>>        QMainWindow(parent),
>>> 
>>>        ui(newUi::DataUtility)//fail
>>> 
>>>        {
>>> 
>>>                ui->setupUi(this);
>>> 
>>> }
>>> 
>>>         Could anybody help?
>> 
>> Qt Application certainly can have > 1 QMainWindow. Search for bug in your code.
>> 
>> 
>> --
>> Regards,
>> Konstantin
>> 
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