protected override void OnDetachingFrom(SampleView bindable)
{
ListView.SelectionChanged -= ListView_SelectionChanged;
ListView = null;
gridLayout = null;
deleteImageParent = null;
headerGrid = null;
gridLayoutViewModel = null;
base.OnDetachingFrom(bindable);
}
protected override void OnAttachedTo(SampleView bindable)
{
ListView = bindable.FindByName <Syncfusion.ListView.XForms.SfListView>("listView");
ListView.SelectionChanged += ListView_SelectionChanged;
gridLayoutViewModel = new ListViewGridLayoutViewModel();
ListView.BindingContext = gridLayoutViewModel;
ListView.ItemsSource = gridLayoutViewModel.Gallerynfo;
headerGrid = bindable.FindByName <Grid>("headerGrid");
headerGrid.BindingContext = gridLayoutViewModel;
deleteImageParent = bindable.FindByName <Grid>("deleteImageParent");
var deleteImageTapped = new TapGestureRecognizer()
{
Command = new Command(DeleteImageTapped_tapped)
};
deleteImageParent.GestureRecognizers.Add(deleteImageTapped);
gridLayout = new Syncfusion.ListView.XForms.GridLayout();
if (Device.RuntimePlatform == Device.Android || Device.RuntimePlatform == Device.iOS)
{
gridLayout.SpanCount = Device.Idiom == TargetIdiom.Phone ? 2 : 4;
ListView.ItemSize = Device.Idiom == TargetIdiom.Phone || Device.Idiom == TargetIdiom.Tablet ? 150 : 170;
}
else if (Device.RuntimePlatform == Device.macOS)
{
gridLayout.SpanCount = 4;
ListView.ItemSize = 300;
}
else if (Device.RuntimePlatform == Device.UWP)
{
gridLayout.SpanCount = Device.Idiom == TargetIdiom.Desktop || Device.Idiom == TargetIdiom.Tablet ? 4 : 2;
ListView.ItemSize = Device.Idiom == TargetIdiom.Desktop || Device.Idiom == TargetIdiom.Tablet ? 300 : 140;
}
ListView.LayoutManager = gridLayout;
ListView.DataSource.GroupDescriptors.Add(new GroupDescriptor()
{
PropertyName = "CreatedDate"
});
base.OnAttachedTo(bindable);
}