Qt Application Weird Pause/Halt issue

Hi there,

I have encountered a weird problem recently. I created a new application that process HTML files with Qt. Here is basically what it does

1. Loads up a HTML page using QWebView
2. Extract some information from the HTML file
3. Go back to Step 1 to process the next one.

The problem is that after a while, the program stops processing. When it stops is totally random. Sometimes it stops after a long while, sometimes it stops half a minute after it starts.

To resume it, all I need to do is just to hover the mouse cursor over the application window. I don't even need to click anything. Just hovering over it and it will start working again.

This happens in Windows 7 and Windows Vista. Not sure about XP since I don't have a machine running it.

I am having a hard time figuring out this problem. Maybe someone can help me with it? Thanks in advance.

Well, that behavior would cause your message pump to be activated, so maybe it was stuck waiting for something to happen?

I don't know why your program acts this way, but maybe the addition of a QTimer would give it an appropriate event to stop hanging?

fatjuicymole, thanks for your reply.

The code does rely on catching "loadFinished" signal from QWebView to make sure an HTML is fully rendered.

Can you please explain a bit more about the "message pump"? I'm not quite sure what that is. Thank you.

Did you figure out why this was happening, and what to do to prevent it? I'm having a similar problem...