CacheWriter errors go unnoticed much too easily

[Code7R]

Failure to write cache is not reported

Just what the title says. If the target directory is not writable then gzopen returns NULL and this information is only going to the log. The user never gets informed about the problem.

Not sure how you would like to make it reported, the stack trace is pretty clear but using plain QMessageBox looks alien in the rest of the application.

bool CacheWriter::writeCache( const QString & fileName, DirTree *tree )
{
if ( ! tree || ! tree->root() )
return false;

gzFile cache = gzopen( (const char *) fileName.toUtf8(), "w" );

if ( cache == 0 )
{
logError() << "Can't open " << fileName << ": " << formatErrno() << endl;
return false;
}

[shundhammer]

I'll have a look at that.

[shundhammer]

I just saw: It is reported, but only to the status line, and that's a very short-lived notification - in particular when you happen to move the mouse over the treemap which causes a gazillion changes to the status line just hovering over treemap tiles.

I had added that latter feature only very reluctantly because some user kept nagging. I should not have given in to that; not only does that make this kind of message disappear in a heartbeat, it also leads to users getting so used to stuff always flickering in the status line that nobody pays attention to it anymore.

[shundhammer]

Now posting an error popup.