[SailfishDevel] Conditional QML element

[E.S. Rosenberg]

Hi David,
You are absolutely correct, this is the better solution which runs at a
reasonable speed (though I expect it consumes more memory).
Thanks!
Eli
PS - so far I have never really profiled the application for memory usage
or tried to do so, does the SDK have some way of doing this?

Op di 7 apr. 2020 om 11:55 schreef David Llewellyn-Jones <david at flypig.co.uk
>:

> Hi Eli,
>
> I'm probably misunderstanding the situation, but can you make individual
> items visible or not (visible: true/false), rather than using Loaders in
> the list?
>
> David
>
> On 07/04/2020 11:22, E.S. Rosenberg wrote:
> > Hi Andrey,
> > Thanks for the suggestion, though having them as Components in the same
> > file instead of external qml files does improve performance it is still
> > a lot slower then just having the component directly in use without a
> > Loader.
> >
> > ie:
> >
> > ListItem {
> >     (...)
> >     ArtArea {
> >     }
> > }
> >
> > Of course like that there is no logic to have either ArtArea or
> > CoverArea but I can have logic in each ArtArea as to which image it is
> > displaying so image loading an logic speed are not the issue but rather
> > just the loader (I can have 400+ length lists where you really see the
> > slowdown).
> >
> > Any other suggestions?
> > Thanks!
> > Eli
> >
> > Op di 7 apr. 2020 om 01:15 schreef Андрей Кожевников
> > <coderusinbox at gmail.com <mailto:coderusinbox at gmail.com>>:
> >
> >     wrap inside Component and set using sourceComponent property
> >
> >     вт, 7 апр. 2020 г. в 01:13, E.S. Rosenberg
> >     <es.rosenberg+sailfishos.org at gmail.com
> >     <mailto:es.rosenberg%2Bsailfishos.org at gmail.com>>:
> >
> >         Hi all,
> >         In the application I maintain (gPodder) I would like to show an
> >         element holding Image(s) in each ListItem, depending on whether
> >         or not the ListItem has a property either a component with 2
> >         images or a component with 1 image should be loaded (an possibly
> >         also a no image fallback).
> >
> >         I have tried implementing this using a Loader:
> >             Loader {
> >                 id: artArea
> >                 anchors {
> >                     left: parent.left
> >                 }
> >                 height: titleItem.height + subtitleItem.height
> >                 width: titleItem.height + subtitleItem.height
> >
> >                 asynchronous: true
> >                 source: episode_art ? "ArtArea.qml" : "CoverArea.qml"
> >             }
> >
> >         However this totally tanks performance, using just "ArtArea"
> >         without the loader is really fast thus the issue is not the
> >         amount of images that need to be loaded.
> >         Is there a better/faster way to do this?
> >
> >         Thanks!
> >         Eli
> >         _______________________________________________
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>
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