CODEWITHSUNDEEP
qtuser-interfaceqt4qt5qwidget
Stan
Stan

Reputation: 38275

Qt to update (repaint) textbox while processing

My Qt 4 application can only update the log box area (actually the whole GUI) until a function finishes execution. Is there any way to update the GUI/log box during the execution? Like adding something like QWidget::repaint() or QWidget::update() in the for loop, so the user can see that the GUI is processing, rather than wait until the function finishes and print out the log at once.

Upvotes: 1

Views: 453

Answers (1)

Daniel Hedberg
Daniel Hedberg

Reputation: 5827

You need to occasionally call QCoreApplication::processEvents() during the execution of your function. This will keep the GUI alive and responsive by letting the event loop run.

An alternative is to execute your function in a separate thread. More information on threads in Qt can be found here: http://qt-project.org/doc/qt-4.8/threads.html.

Upvotes: 2

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