Render SVG to QPixmap with unknow target size and without loss of quality

[pvt.peter]

Hi,

I have got an *.svg file and i would like to scale it into a QPixmap which has got an unknow target size.
So when i would like to scale the *.svg file, i do not know the target size of it.

I have used it so far:

...
QPixmap(":/path/to/svgfile.svg").scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
...

But I realized that it is not appropriate.
Now the QPixmap is not pixelised, but it has got an other behavior if it appears on a responsive surface.
Because the smooth transformated 100×100 sized image would be rescaled into a bigger surface,.
And we are again at the beginning, the image is pixelised.

How can i reach the next?

• render QPixmap from *.svg file when the target size is known

Thanks for advance,
Peter

[A Former User]

Hi! Can't you just use QSvgWidget Class?

[pvt.peter]

Hi @Wieland,

Thanks for reply and sorry for my late reply.
Unfortunately QSvgWidget class can not use in this case.

Any other solution about it?

[mostefa]

Hi @pvt-peter ,

If you can not use QSvgWidget as suggested by @Wieland ,and If you are not obliged to use QPixmap

You can do something like this:

Have QWidget named imageContainerWidget;

Change stylesheet to imageContainerWidget as follows:

QWidget#imageContainerWidget
{
	   image: url(":/images/path/to/svgfile.svg");
}

And that's it !

When your imageContainerWidget is resized your image will be resized too,

The result will be then something like this:

Before resizing:

After resizing:

Hope this can help!

[pvt.peter]

@mostefa: Thanks for your detailed reply.
It is a good solution.

[mostefa]

@pvt.peter said in Render SVG to QPixmap with unknow target size and without loss of quality:

@mostefa: Thanks for your detailed reply.
It is a good solution.

You are welcome =)