QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Getting events to a PtRaw widget which is contained by a PtPane widget |
| Ref. No. |
QNX.000009910 |
| Category(ies) |
Development |
| Issue |
We have a PtRaw inside a PtPane widget.
We would like to get the following events:
* when user clicks in the region, we want to know the position where the user clicked,
* when and where user right-clicked(time and position),
* when the user drags over the region (feedback to the user where is he selecting).
|
| Solution |
*Attach a Pt_CB_ARM callback to the raw widget. Make the raw widget selectable.
*Attach a Pt_CB_MENU callback to the raw widget.
Make the widget menuable (i.e. widget flags: Pt_ARG_FLAGS). In boath of these requests you can get the position of the event from cbinfo->event in two ways:
I: Relative coordinates like this
x09x09rect = PhGetRects(cbinfo->event);
(rect.ul and rect.lr will be equivalent as clicks are point events)
II: Absolute(Global photon event space) coordinates like this:
x09x09PhPointerEvent_t *pev = PhGetData(cbinfo->event);
then look at pev->pos.x and pev->pos.y.
* See PhInitDrag() or attach a raw callback sensitive to Ph_EV_MOTION_BUTTON events, and do as you wish with the data. |
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