[Qt-interest] QTabWidget::currentWidget() problem

[Keshava Krishna]

Is this happening because i called    "
textTab->setCurrentWidget(textEditorArray[0]);"
in a slot that has been connected to "textTab->currentChanged(int)" ??
Can anyone help me out?

Regards,
Keshava.

On Wed, Apr 1, 2009 at 10:50 AM, Keshava Krishna
<keshavkrishna88 at gmail.com>wrote:

> Thanks Alex, the code you gave worked...
>
> But 'm facing a new problem now....
> 'm trying to give a fading effect while user clicks on a tab
> i have used the following signal connection for this pupose
>
>
> connect(textTab,SIGNAL(currentChanged(int)),this,SLOT(tabTransformation()));
>
> and the tabTransformation function is like this..
>
> void Win::tabTransformation()
> {
>
>     QColor *color1 = new QColor(255,255,255,0);
>     QTextEdit *ptr1 = qobject_cast< QTextEdit *>(textTab->currentWidget());
>     textTab->setCurrentWidget(textEditorArray[0]);
>     QPalette *palette = new QPalette();
>     for(int i=0;i<10;i++)
>     {
>         *color1 = QColor::fromRgbF(1,1,1,1*(i+1)/10);
>         palette->setColor(QPalette::Active,QPalette::Base,*color1);
>         ptr1->setPalette(*palette);
>         palette->setColor(QPalette::Inactive,QPalette::Base,*color1);
>         ptr1->setPalette(*palette);
>         textEditorArray[0]->show();
>         QTest::qWait(100);
>     }
>
> }
>
> but now when i open a new tab (in textTab), it is giving segmentation
> fault... by using qDebug(0 i discovered that the following line is giving
> the segmentation fault..
>         ptr1->setPalette(*palette); this
>
> Can anyone suggest me why is this happening, please suggest me a better way
> way acomplishing this task..
>
> Regards,
> Keshava.
>
>
> On Wed, Apr 1, 2009 at 1:48 AM, Malyushytsky, Alex <alex at wai.com> wrote:
>
>> >> Before this used to be a warning and my program was working fine, but
>> now it has become an error( 'm really surprised )
>>
>> I guess you changed compiler.
>> Use a proper cast. I would recommend qobject_cast in this case:
>>
>>
>> QTextEdit *ptr1 = qobject_cast< QTextEdit *>(obj);
>>
>> Regards,
>>  Alex
>>
>> ________________________________________
>> From: qt-interest-bounces at trolltech.com [mailto:
>> qt-interest-bounces at trolltech.com] On Behalf Of Keshava Krishna
>> Sent: Tuesday, March 31, 2009 5:20 AM
>> To: qt-interest at trolltech.com
>> Subject: [Qt-interest] QTabWidget::currentWidget() problem
>>
>> Hi,
>> 'm using a tabwidget to which 'm adding many QTextEdit s...
>> now i want to get a pointer to the currently activated widget...
>> i used the following code
>>
>>    QTextEdit *ptr1 = textTab->currentWidget();
>>
>> but it is giving the following error
>>
>> Win.cpp:846: error: invalid conversion from 'QWidget*' to 'QTextEdit*'
>>
>> Before this used to be a warning and my program was working fine, but now
>> it has become an error( 'm really surprised )
>>
>> can anyone help me out to debug this ?
>>
>> Regards ,
>> Keshava.
>>
>>
>>
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