I wrote 2 programs:
First - using PhAB and the second “manually” (w/o PhAB).
In both I used operation “dragg” for a widget (e.g. vertical
selector PtSelector - used as “cursor line” for a graph).
In the program maked using PhAB the both methods of “dragg”
works correctly (outline dragging and opaque dragging).
In my code wrotten “manually” (w/o PhAB) I used exactly
the same callback functions for dragging. Unfortunately,
works only “outline dragging”. “opaque dragging” doesn’t
work, and that’s just what I need …
My question is: Why there works only the first (outline) method
of dragging, ad the second doesn’t? The only one difference is
another value in the second parameter PhInitDragg() funtion!
int kursor_dragging_cb( PtWidget_t *w, void *dane, PtCallbackInfo_t
*cbinfo )
{
PhRect_t rect, boundary;
PtWidgetExtent( w, &rect );
PtWidgetExtent( grid_wykresy, &boundary );
PhInitDrag( PtWidgetRid( pane_wykresy ),
Ph_TRACK_DRAG | Ph_DRAG_TRACK, << — doesn’t work
&rect, with
Ph_DRAG_TRACK
&boundary,
Event->input_group,
NULL,
NULL,
NULL );
return( Pt_CONTINUE );
} // kurosr_dragging_cb
/* ------------------------------------ */
int raw_dragging_cb( PtWidget_t *w, void *dane, PtCallbackInfo_t *cbinfo
)
{
PhEvent_t *Event;
PhDragEvent_t *dragev;
PhPoint_t new_pos;
Event = cbinfo->event;
if ( Event->subtype != Ph_EV_DRAG_COMPLETE
&& Event->subtype != Ph_EV_DRAG_MOVE )
return( Pt_CONTINUE );
dragev = PhGetData( cbinfo->event );
new_pos.x = dragev->rect.ul.x + cbinfo->event->translation.x;
new_pos.y = dragev->rect.ul.y + cbinfo->event->translation.y;
return( Pt_CONTINUE );
} // raw_dragging_cb
/* ------------------------------------ */
\
Regards,
Arkadiusz Benes
ZEiSAP MikroB S.A. Oddzial Wroclaw
ul.Leszczynskiego 4, 50-078 Wroclaw
tel./fax (+71) 344-22-55 http://www.mikrobsa.com.pl/