QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Catching Photon Exit |
| Ref. No. |
QNX.000009752 |
| Category(ies) |
Development |
| Issue |
We know that we can catch a PhAB program exiting because of Menu/Close, Close Button, or ALT-F4 by use of Window Closing Callback.
Is it possible to catch it in a such a way that the user can be given a second chance(e.g. Are you sure that you want to exit(Y or N)?..)?
|
| Solution |
Yes, you can, and quite a few of our applications actually use it. This is the way to do it:
- make sure that Ph_WM_CLOSE is set in Pt_ARG_WINDOW_NOTIFY_FLAGS.
- turn off Pf_WM_CLOSE in Pt_ARG_WINDOW_MANAGED_FLAGS.
- attach a Pt_CB_WINDOW callback that detects a Ph_WM_CLOSE event, pops-up the "Are you sure..." dialog, and exits if the answer is "Yes". |
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