[Qt-interest] SOLVED QImageReader cannot detect image format

[Oliver.Knoll at comit.ch]

Guido Seifert wrote on Thursday, May 06, 2010 9:20 AM:

> This is sick. I found the problem. When in the QImageReader docs
> 'filename' is written, 'filename' is meant. NOT an absolute file
> path.

why is this "sick" if someone says "A" and actually means "A" (and not "B")? ;) /foo/bar/barfoo.jpg would be a file PATH for me, barfoo.jpg the file NAME. Also refer to http://doc.trolltech.com/4.6/qfileinfo.html#fileName and http://doc.trolltech.com/4.6/qfileinfo.html#absoluteFilePath.

But I agree with you that this naming is unfortunatelly not entirely consistent through the Qt API: for example http://doc.trolltech.com/4.6/qfile.html#QFile c'tor takes a file NAME, when in fact it is meant to be a PATH. Also http://doc.trolltech.com/4.6/qfile.html#fileName normally returns the entire path, when the file was constructed like:

  QFile file("/foo/bar/barfoo.jpg");
  String fileName = file.fileName(); // returns /foo/bar/barfoo.jpg
  QFileInfo fileInfo(file);
  fileName = fileInfo.fileName(); // returns just (correctly) barfoo.jpg!

But QFile could also be used like this:

  QFile file("barfoo.jpg"); // file name only

So I guess that would operate on the file name in the current working directory (and in this use case the c'tor parameter name fileNAME is justified).

Cheers, Oliver