QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
How can I ask for confirmation before my application is closed? |
| Ref. No. |
QNX.000000713 |
| Category(ies) |
Development |
| Issue |
I want to be notified when the user presses Alt-F4 to close a window so I can implement code to ask the user if they want to cancel, or save their changes.
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| Solution |
You need to set the resources on the base window so that it does not handle the close message, but will notify you.
Pt_ARG_WINDOW_MANAGED_FLAGS should have the Ph_WM_CLOSE turned off, and the
Pt_ARG_WINDOW_NOTIFY_FLAGS should have it turned on.
Then Attach a Pt_CB_WINDOW Callback, and check the sub-types, and then handle the close message by doing your display window code.
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