QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Receiving a LOST_FOCUS callbacks from a text widget |
| Ref. No. |
QNX.000009858 |
| Category(ies) |
Development |
| Issue |
We are receiving LOST_FOCUS callback from a text widget and they work just fine, except, we also receive LOST_FOCUS callbacks when the window is destroyed.
We do not want to process the LOST_FOCUS callback on the event that is going to destroy the window.
When we receive a callback at the time the container window is being destroyed, the Pt_DESTROYED flag is not SET.
Is there any way to detect that a LOST_FOCUS callback was called because the widget is about to be destroyed?
|
| Solution |
Take a look at the widget and all its parents flags to see if one of its parents has been flaged as destroyed.
Here is a sample code:
x09
x09PtArg_t argt;
x09long *flags;
x09
x09PtSetArg(&arg, Pt_ARG_FLAGS, &flags, 0);
x09for(wp = widget; wp; wp = PtWidgetParent(wp)){
x09x09PtGerResources(wp, 1, &argt);
x09x09if(*flags & Pt_DESTROYED)
x09x09x09return Pt_CONTINUE;
x09}
x09.
x09.
x09.
|
|
