run go fmt on widgets/

[ilius]

Copy of therecipe#1287

[ilius]

Are you going to enable issues?

Also there are lot of references to https://github.com/StarAurryon/qt/

I have some more changes to make. (mostly bug fixes).
Should I add PR on develop branch?

[fluorohead]

Hello.
I think the same problem exists in your fork as in therecipe/qt :

func main() {
s := "\x89\x50\x4e\x47"
fmt.Println([]byte(s), "len:", len(s))
ba := core.NewQByteArray()
ba.Append6(s)
fmt.Println([]byte((nba.Data())), "len:", len(nba.Data()))
}

Output :
[137 80 78 71] len: 4
[239 191 189 80 78 71] len: 6

s - just a Go string, defined by hex symbols
ba - is a Qt bytearray, generated from s as an input data

Expecting the qbytearray data and length will be equal to s, but there's some undercover transformations.
I suppose golang or Qt converts [0] symbol 137 (\x89) to [239 191 189] (\xEFBFBD), because it's undefined symbol in UTF-8 and must be converted to so named "replacement character".

We don't need such transformation, because it breaks the qpixmap creation from qbytearray.
It'a pity the original therecipe/qt bindings for qbytearray can not work with []byte, only with string.