Slot function's concurrent multiple executions

[MavenTux]

Thanks for the reply. I tried two things: First as you suggested setDisabled/setEnabled and second disconnecting the signal-slot on entry and reconnecting on exit. These seem to work but I think there will be a race condition in both these solutions? One scenario for such a race is: first two clicks were so fast that both the slots were entered before the first one could complete the execution of setDisabled or disconnect.

The QT documentation says "The about box has a single button labelled "OK". On Mac OS X, the about box is popped up as a modeless window; on other platforms, it is currently application modal.". I think for android also it should be application modal as only for OS X they have specifically mentioned it. Assuming that it is application modal, (as when the about box is displayed, I am not able to give input to the main window until I close the about box) I think what is happening is that before the first about message box is in displayed, the second click is already initiated causing another box to popup. order of events first_click->second_click->slot1->slot2. So even if I use an application modal dialog, the same issue may come up? ... Secondly, using the same code I am not able to reproduce the issue on Windows, I m not sure why.