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Use QImage, QPicture is designed for saving the commands to a file...
QImage is designed for exactly what you are trying to do...
QImage img;
QPainter painter( &img )
Do the painting, then call update()
Scott
> -----Original Message-----
> From: qt-interest-bounces@xxxxxxxxxxxxx [mailto:qt-interest-
> bounces@xxxxxxxxxxxxx] On Behalf Of Malyushytsky, Alex
> Sent: Monday, June 01, 2009 7:21 PM
> To: qt-interest@xxxxxxxxxxxxx
> Subject: Re: [Qt-interest] [Qt-Interest] Painting outside paintEvent in QT4.5
> : Widget painting can only begin as a result of a paintEvent
>
> According to how I see it:
>
> Approach A (simplest)
> ------------------------------------------------------------------
> Instead of painting to the widget, paint to the QPixmap or QImage.
> Update the widget when painting done.
>
> + minimum changes to the paining code.
> - sometimes update of the whole widget from image is inefficient and it might
> be not that easy to implement it efficiently.
> And things got worse when you like to see evolution of the drawing on the
> screen instead of the result.
>
>
> Approach B (never tried, but it looks promising, if I don't make any mistake
> about it functionality)
> ------------------------------------------------------------------
> Paint to QPicture, store QPicture object(s).
> Call update when required, use QPicture object to draw in the paint event.
>
> I can't recommend it, cause I never tried, but it seems more powerful.
>
>
> Best regards,
>
> Alex
>
>
>
>
> -----Original Message-----
> From: qt-interest-bounces@xxxxxxxxxxxxx [mailto:qt-interest-
> bounces@xxxxxxxxxxxxx] On Behalf Of Thiago Macieira
> Sent: Saturday, May 30, 2009 2:52 PM
> To: qt-interest@xxxxxxxxxxxxx
> Subject: Re: [Qt-interest] [Qt-Interest] Painting outside paintEvent in QT4.5
> : Widget painting can only begin as a result of a paintEvent
>
> shivam priyadarshi wrote:
> >I have this kind of code structure at various places in application. I
> >have tight schedule, it will be great help if you can help me with make
> >it work with QT4.5 with painting outside paintEvent.
>
> You have to refactor your code so that you paint only inside the paintEvent.
> --
> Thiago Macieira - thiago.macieira (AT) nokia.com
> Senior Product Manager - Nokia, Qt Software
> Sandakerveien 116, NO-0402 Oslo, Norway
>
>
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