Checking the listbox's Property "Hide extra blank rows" stopped 4D from unexpectedly quitting when using LISTBOX SELECT ROW(*;"valsBox";0;lk replace selection) // and it's fast or just having a lot of rows to highlight in a loop.
The crashing showed up more often in compiled mode before the change. Still have the spinning wheel however. Keith - CDI > On Apr 16, 2019, at 9:22 AM, Keith Culotta via 4D_Tech <[email protected]> > wrote: > > Justin, > > Thank you for the suggestion. > > I switched the deselect-all code to > LISTBOX SELECT ROW(*;"valsBox";1;lk replace selection) > LISTBOX SELECT ROW(*;"valsBox";1;lk remove from selection) > and the selection did clear, however as soon as this add-to-selection code is > executed > LISTBOX SELECT ROW(*;"valsBox";0;lk replace selection) > 4D immediately crashes. > > If all 40k rows get deselected, using either method, and selecting them all > again is done in a loop, the loop finishes in about two seconds. > At that point the macOS spinning wheel appears for three minutes. The > highlight then appears and control is returned to the app. > The fewer the records being highlighted, the shorter the macOS wheel spins. > > Regards, > Keith - CDI > >> On Apr 15, 2019, at 7:50 PM, Justin Carr via 4D_Tech <[email protected]> >> wrote: >> >> On 16 Apr 2019, at 5:04 am, Keith Culotta via 4D_Tech <[email protected]> >> wrote: >>> >>> Hello, >>> >>> I'm looking for a fast way to highlight a selection of rows in an entity >>> selection listbox. The way I am aware of works OK unless the listbox gets >>> a large number of rows. >>> >>> Adding records to the Selected Items name in the Property list does not >>> highlight the listbox contents. The equivalent of adding records to the >>> "UserSet" is not available with entity selection listboxes. >>> >>> Highlighting all with LISTBOX SELECT ROW(*;"listBox";0;lk add to selection) >>> crashes 4D if the listbox contains enough records. >>> LISTBOX SELECT ROW(*;"listBox";$position;lk add to selection) crashes if >>> put in a fast FOR loop. If the loop is executed more slowly there is >>> success. The slowness comes from looking for entitySelected[i] within the >>> entity selection and highlighting its position in the listbox. >>> >>> Is there a better way to get there? >> >> Hey Keith >> >> Are you clearing the listbox selection first (with LISTBOX SELECT >> ROW(*;"listBox";0;lk remove from selection)? If so, that is probably the >> cause of the crashing you are seeing. You can workaround it by highlighting >> and unhighlighting the first row instead, i.e. >> >> LISTBOX SELECT ROW(*;"listBox";1;lk replace selection) >> LISTBOX SELECT ROW(*;"listBox";1;lk remove from selection) >> >> cheers >> Justin > > ********************************************************************** > 4D Internet Users Group (4D iNUG) > Archive: http://lists.4d.com/archives.html > Options: https://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:[email protected] > ********************************************************************** ********************************************************************** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
