Re: Fast way to highlight a listbox entity selection

Hi JPR, Fuzziness is a good description, but things stand in sharper relief today. I was more focused on the syntax than the mechanics and for no particular reason started out with collections. Converting the app to an entity selection approach is turning out to be much easier than expected,

Re: Fast way to highlight a listbox entity selection

[JPR] Hi Keith, a) It seems that there is some fuzziness in the way Entity Selections and Collections are understood. Let's try to make it more precise: - An Entity selection doesn't 'contain' the Entities, it's a List of Entity References (in this case, a reference is a 4D internal référence

Re: Fast way to highlight a listbox entity selection

Bingo. On Tue, Apr 16, 2019 at 11:53 AM Keith Culotta via 4D_Tech < 4d_tech@lists.4d.com> wrote: > It's looking like it can all be done with entity selections, and be more > efficient. > -- Kirk Brooks San Francisco, CA === What can be said, can be said clearly, and what yo

Re: Fast way to highlight a listbox entity selection

Kirk, Interesting stuff, especially how entitySelection.toCollection duplicates data. I'm currently displaying collections in the listbox. It's looking like it can all be done with entity selections, and be more efficient. Thanks, Keith - CDI > On Apr 16, 2019, at 12:53 PM, Kirk Brooks via

Re: Fast way to highlight a listbox entity selection

Keith, You know you can go about this from another point of view. I actually posted about this a bit ago. This won't accomplish exactly what you are asking for but it may be something you can use. First, remember that even when you have a very large collection or entity selection, as you seem to,

Re: Fast way to highlight a listbox entity selection

Douglas, That seems promising. Since the listbox is a collection/entity selection, each row's color would be set by the rows presence in the "Selected items" collection. I imagine the performance would be OK as long as the search only took place as the row becomes visible to the User. Kirk's

Re: Fast way to highlight a listbox entity selection

All, I just started a Feature Request for this: http://forums.4d.com/Post//29409213/1/ Take a look and see what you think. Collection/entity based listboxes are a very different animal from array or selection based ones. And the way to work with them is different too. Frankly the easiest thing wou

Re: Fast way to highlight a listbox entity selection

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

Re: Fast way to highlight a listbox entity selection

Keith: How about this - rather than change the highlight, what about just changing the color of the rows to mimic that they’re selected? You can still maintain array of record numbers/ID’s that represent the selection but just update the UI so that it looks like the rows are selected. My thinking

Re: Fast way to highlight a listbox entity selection

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

Re: Fast way to highlight a listbox entity selection

On 16 Apr 2019, at 5:04 am, Keith Culotta via 4D_Tech <4d_tech@lists.4d.com> 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