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MichaelRumpler / GestureSample

Sample App for MR.Gestures
MIT License
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ListView detect LongPress having SelectionMode="None" #16

Closed marcellangmaier closed 5 months ago

marcellangmaier commented 5 years ago

I want to detect a Tap and a LongPress on a Listview item having the property ListView.SelectionMode set to "None".

The builtin ListView ItemTappedEventArgs provide an Item property, so that I can figure out the Item which was tapped. Unforunately your LongPressEventArgs does not provide this information, so that I only can rely on the SelectedItem property of the ListView. This does not work with ListView.SelectionMode="None".

If I am using your ViewCell and catch the Tap and LongPress, I can use the BindingContext of the sender to find out which Item was affected. But: the light grey flash animation when tapping the cell does not appear anymore. So the user does not have a feedback that the cell was hit.

I am looking for a way to either get the Viewcell animated when tapping it or finding out the long pressed item within your ListView_LongPressing event handler.

marcellangmaier commented 5 years ago

The tap Animation works on ios, but not on android.

MichaelRumpler commented 5 years ago

That the ListView provides only information about the ListView itself and not its cells is by design.

For the missing animation I opened a bug in Xamarin.Forms in 2015!! @kingces95 and @pauldipietro added something in 2017, but otherwise the bug was ignored.

We could create an issue on https://github.com/xamarin/Xamarin.Forms/issues too, but then we should first test if the same happens with a CollectionView. It is very likely and they will most probably be more inclined to look at it if the bug happens in their shiny new control.

MichaelRumpler commented 5 months ago

This is a Xamarin.Android bug which is open for 9 years now. I can't do anything about it, so I'm closing it.