Xamarin.forms: [CollectionView] Updating the ItemsLayout type should refresh the layout
More a work task than a bug due to the ongoing development of CollectionView (but we'll just categorize it as a bug for now), it should update its layout when switching the ItemsLayout types from a ListItemsLayout to GridItemsLayout. A good example of where this would be used is in a UI where the user is allowed to toggle between those layouts, such as in a retail app.
This is supposedly semi-functional on iOS but wasn't personally tried. Android doesn't update the layout.
Steps to Reproduce
- Use a CollectionView with one of the two layout types
- Switch to the other layout type in app (such as via a button tap)
Expected Behavior
The CollectionView updates its layout to the new type.
Actual Behavior
The CollectionView does not update its layout until leaving and reentering the page (such as with tabs).
pauldipietro
All 2 comments
Another possible usage is to switch the number of columns when the device is rotated.. Much needed.
//Not updating at runtime on Android
public void SetColumns(int columns = 2)
{
var grid = ItemsLayout as GridItemsLayout;
if (grid!=null)
{
if (grid.Span == columns)
return; //avoid unneeded
}
ItemsLayout = new GridItemsLayout(columns, ItemsLayoutOrientation.Vertical);
}
taublast
on 2 Jul 2019
Is it not possible to have this for UWP also?
EmilAlipiev
on 13 Apr 2020
Related issues
sonic1015
路
3Comments
rmarinho
路
3Comments
joseluisct
路
3Comments
MartinWegner
路
3Comments
mattregul
路
3Comments
Most helpful comment
Another possible usage is to switch the number of columns when the device is rotated.. Much needed.
//Not updating at runtime on Android public void SetColumns(int columns = 2) { var grid = ItemsLayout as GridItemsLayout; if (grid!=null) { if (grid.Span == columns) return; //avoid unneeded } ItemsLayout = new GridItemsLayout(columns, ItemsLayoutOrientation.Vertical); }