[pyqtgraph] SVG export entire dock view.

[Won Jun Son]

I have an app that is composed of several graphs which are put into a dock.

The dock is a dock of pyqtgraph not pyqt4.

And I have a mainwindow of pyqt4.

Let's say my dock is 'dock'

Then I put this into the mainwindow by doing
mainwindow.setCetnralWidget(dock).

Here, I do not know how should I export entire image of my plots including
mainwindow.

I tried several methods but all failed(tried pyqt svg export feature too,
but it failed to export inside plots intact).

It seems like dock example in pyqtgraph can't export full screen as SVG
too. right?

Now I am thinking of export full screen in png and convert it to SVG by
using a library. But, I want to know whether there is a way I can do this
without introducing another library.