PtList scrollbar width not settable.

QNX Newsgroups (Archives) qnx.gui
1

This same complaint was posted last December with no responses.
PtList scrollbar width does not respond to resource editing in PhAB
nor can you alter it in pre-realization code.
Does anyone know if this is a known bug
on the QNX To-Do list or if there is a work-around that can be used
today. The intended user of our application will likely be wearing
gloves and we need to make nice and chubby touch screen contact
points!

2

This is a work around (this bug is fixed in the next release).
Attach a Pt_CB_REALIZED callback:

int
list_realized_cb( PtWidget_t *widget, ApInfo_t *apinfo, PtCallbackInfo_t
*cbinfo )
{
PtGenListWidget_t list = (PtGenListWidget_t)widget;
unsigned short *width;

// NOTE: Using the width which was set by user in phab.
PtGetResource( widget, Pt_ARG_SCROLLBAR_WIDTH, &width, 0 );

// This code sets the actual sizes of scrollbar(s).
if( list->scrollbar )
PtSetResource( list->scrollbar, Pt_ARG_WIDTH, *width, 0 );
if( list->hscrollbar )
PtSetResource( list->hscrollbar, Pt_ARG_HEIGHT, *width, 0 );

// This is a work around to make the list widget to
// position (anchor) scrollbars correctly (with the new size).
PtSetResource( widget, Pt_ARG_SCROLLBAR_WIDTH, *width - 1, 0 );
PtSetResource( widget, Pt_ARG_SCROLLBAR_WIDTH, *width, 0 );

return Pt_CONTINUE;
}

-Misha.


“rlb” <robert.bottemiller@fmcti-dot-com.no-spam.invalid> wrote in message
news:d6tj9v$8g3$1@inn.qnx.com…

This same complaint was posted last December with no responses.
PtList scrollbar width does not respond to resource editing in PhAB
nor can you alter it in pre-realization code.
Does anyone know if this is a known bug
on the QNX To-Do list or if there is a work-around that can be used
today. The intended user of our application will likely be wearing
gloves and we need to make nice and chubby touch screen contact
points!

3

Misha,

Thanks for the work-around. I’m curious as to why, in the last two
calls to PtSetResource(), Pt_ARG_SCROLLBAR_WIDTH is set to *width-1
then immediately set to *width?

For my purposes, it appears that PtComboBox could be an alternative.
The width of the list-expanding button
does change when that resource is
edited. But I’d prefer PtList and will try your expert tip.

Thanks,
Bob

4

This is required because it is a work-around :wink:.
Seriously: it is required to trick the list to do the required work to apply
new scrollbar width to it.
-Misha.
“rlb” <robert.bottemiller@fmcti-dot-com.no-spam.invalid> wrote in message
news:d6vpk1$r71$1@inn.qnx.com…

Misha,

Thanks for the work-around. I’m curious as to why, in the last two
calls to PtSetResource(), Pt_ARG_SCROLLBAR_WIDTH is set to *width-1
then immediately set to *width?

For my purposes, it appears that PtComboBox could be an alternative.
The width of the list-expanding button
does change when that resource is
edited. But I’d prefer PtList and will try your expert tip.

Thanks,
Bob