modify TextEdit so that the NSTextView has transparent background. how?

Question

I would like to have the NSTextView background and the window itself of TextEdit transparent but I'm not really sure how to do this. Some hints would be great.

Answer 1

This code seems to work:

[[self firstTextView] setDrawsBackground:NO];
[scrollView setDrawsBackground:NO];
[[self window] setBackgroundColor: [NSColor clearColor]];
[[self window] setOpaque:NO];