Can i save or convert qwtplot into say .jpg or .jpeg, or ....!

[Krish]

Hello! Friends,
I am working with Qt4.3 on WinXp. I have a application with qwtplot to draw curves of my application. Now i want to save/convert the drawn qwtplot into a.jpg or. jpeg or .bitmap or any format and save it to the same directory which i can afterwards use to analyse few things.

Can anyone please suggest me the right path to do the needful.

Thanks in Advance

[Uwe]

a) Use QwtPlot:rint(QPaintDevice&, ...);
b) Use QPixmap::grabWidget

I always recommend a) because the plot is rendered to the geometry of your target and with SVG or PDF you can have a scalable vector graphics format. F.e. you can zoom in a PDF viewer later ( limited by the fact, that Qwt still uses integers, because of Qt3 compatibility ).
The bode example shows how to do it.

With b) you get a screenshot of your window.

Uwe

[Krish]

Hello! Uwe,
Thanks very much for informing me that. I got the required result with step a).
But i also want to save the screenshot of my widget, for which i tried step b) but not working
Here is what i tried: -

QPixmap screen;
screen.grabWidget(this);
screen.save("screenshot","JPG",-1);

Can you please suggest where am i going wrong?

Thanks in advance.

[wysota]

grabWidget() is a static method.

[thadeu]

Originally Posted by Krish

Hello! Uwe,
Thanks very much for informing me that. I got the required result with step a).
But i also want to save the screenshot of my widget, for which i tried step b) but not working
Here is what i tried: -

QPixmap screen;
screen.grabWidget(this);
screen.save("screenshot","JPG",-1);

Can you please suggest where am i going wrong?

Thanks in advance.

I think you need to do this:
QPixmap screen;
screen = QPixmap::grabWidget(this);
screen.save("screenshot","JPG",-1);

Thadeu

[Krish]

Hey! Thanks Thadeu for replying, but i have already solved the problem.

Best Regards.