Main UI Freezes on QFileDilog is up

[navi1084]

Hi,
I am developing a app which displays continuous data from the external device using QTcpSocket. This data's are displayed either in text controls or in image format(if it is image). my application has the facility to save the data which is recieved.

Data's are updated properly in the controls when the app is up. But if i open the saveToFile (Using QFileDialog:: getSaveFileName()), all the main app's data will freeze. I found that data's are recievd and processed when SaveToFile() dialog is opened. but updating in controls getting freezed. when i close the SaveToFile() dialog, data's prperly updated in control.

Can anyone tellme why it is like this?? Is there any solution to resolve???

[navi1084]

I further noticed that, since i am drawing image too, the data's will not update() if i call update(). But if i call repaint() all the data's in the controls, as well as image in the widget is updated.

Can you please tell me which function is blocking from drawing(calling paintEvent()) when modal dialog is executed on the top of main UI.

[Kumosan]

You are working on Windows? According to docs:

On Windows the dialog will spin a blocking modal event loop that will not dispatch any QTimers,

[navi1084]

Is there anyway to avoiding the freeze????

[Kumosan]

Is there anyway to avoiding the freeze????

If it really is this problem, you might want to instantiate and configure your file dialog 'manually' and not use the convenient static function.