[Qt-interest] Screen is getting white

[Sujan Dasmahapatra]

Thanks for the suggestion alex. Actually I am doing all the calculations in different thread but I am not refreshing the screen probably becuz of that it sometimes getting white.

Kind Regards,
Sujan Dasmahapatra
-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Alexandre Beraud
Sent: Friday, April 17, 2009 3:26 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] Screen is getting white

Hi,

It looks like your main events loop is blocked somehow. You shall make 
the heavy calculations in a different thread and use signals to refresh 
the display in the main thread.

Regards,

Alex


Sujan Dasmahapatra a écrit :
>
> Dear Friends
>
> I have developed a software where I am loading multiple geometries one 
> by one and it’s appearing on the screen  as well as the file name is 
> being updated in my QtableWidget. But I do’t know why sometimes the 
> screen is getting white and no geometry is visible.I fixed the scene 
> background  color as black so there’s no reason for it to get white. 
> After analyzing the problem I came to know that the geometry is 
> actually being uploaded but the screen is getting white and the 
> geometry is not visible.But if I continue the operation and  if I load 
> another geometry then all the geomries are visible.I don’t know why 
> it’s sometimes getting white and invisible.
>
> Could anyone tell me the possible reason.Here I am writing the code 
> which is managing my Scene and View.
>
> Please help me
>
>     
>
>  
>
> *     scene->addItem(geometry[countMainWindow]);*
>
> *     tableWidget->fileNameUpdate(fileGeometry[countMainWindow], 
> geometry[countMainWindow]);*
>
> *     view->fitInView(geometry[countMainWindow],Qt::KeepAspectRatio); 
> //This two functions are fitting the geometry on the view*
>
> *     view->setSceneRect(xmin,-ymax,width,height);*
>
> *     view->show();*
>
> *     statusBar()->showMessage(tr("Part loaded"),2000);*
>
> *     consoleView->append(fileGeometry[countMainWindow] + " is loaded");*
>
> *     countMainWindow++;*
>
> *     firstTime = false;*
>
>  
>
>  
>
> Kind regards,
> LM Glasfiber R&D (India) Pvt. Ltd.
>  
> Sujan Dasmahapatra
> Project Engineer - CFD
>  
> Telephone: +91 80 66470248
> Mobile:
> E-mail: sdh at lmglasfiber.com <mailto:sdh at lmglasfiber.com>
>
>  
>
>  
>
>  
>
>  
>
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