QTcpSocket cause the GUI freeze

[xiaoyifang]

It must be dict.org. I use wikipedia behind the proxy and it doesn't block my input.

goldendict-ng/src/dict/dictserver.cc

Line 66 in f0dcc36

if ( !socket.waitForConnected( 100 ) )

seems caused by this line.
The weird place is that this function is invoked from the qtconcurrent already?How can it still freeze the GUI?
I reduce the time only to reduce the freeze time, but the function also been affected too. 100 ms is not enough to set up a connection.

maybe rewrite the whole logic in asyncronous(nonblock) signal .

Originally posted by @xiaoyifang in #1244 (comment)

[xiaoyifang]

QTcpSocket seems have some relation with this.

I have tried both the signal slot method #1246,

and use a seperate thread staged...opt/wiki-word-suggestion-list-2 to implement the logic .

Both methods failed and still freeze the gui for a few seconds.

maybe drop QTcpSocket and use a different network library?