protected override void OnAttachedTo(ContentPage bindable)
{
ListView = bindable.FindByName <SfListView>("ListView");
ListView.Loaded += ListView_Loaded;
visualContainer = ListView.GetVisualContainer();
base.OnAttachedTo(bindable);
}
protected override void OnAttachedTo(ContentPage bindable)
{
ListView = bindable.FindByName <SfListView>("listView");
Button = bindable.FindByName <Button>("scrollButton");
Container = ListView.GetVisualContainer();
Button.Clicked += Button_Clicked;
base.OnAttachedTo(bindable);
}
protected override void OnAttachedTo(ContentPage bindable)
{
ListView = bindable.FindByName <SfListView>("listView");
VM = new ContactsViewModel();
ListView.BindingContext = VM;
AddButton = bindable.FindByName <Button>("addItem");
AddButton.Clicked += AddItem_Clicked;
visualContainer = ListView.GetVisualContainer();
base.OnAttachedTo(bindable);
}
private void TappedGestureCommandMethod(object obj)
{
var tappedItemData = obj as Contact;
if (TappedItem != null && TappedItem.IsVisible)
{
var previousIndex = listView.DataSource.DisplayItems.IndexOf(TappedItem);
TappedItem.IsVisible = false;
if (Device.RuntimePlatform != Device.macOS)
{
Device.BeginInvokeOnMainThread(() => { listView.RefreshListViewItem(previousIndex, previousIndex, false); });
}
}
if (TappedItem == tappedItemData)
{
if (Device.RuntimePlatform == Device.macOS)
{
var previousIndex = listView.DataSource.DisplayItems.IndexOf(TappedItem);
Device.BeginInvokeOnMainThread(() => { listView.RefreshListViewItem(previousIndex, previousIndex, false); });
}
TappedItem = null;
return;
}
TappedItem = tappedItemData;
TappedItem.IsVisible = true;
if (Device.RuntimePlatform == Device.macOS)
{
var visibleLines = listView.GetVisualContainer().ScrollRows.GetVisibleLines();
var firstIndex = visibleLines[visibleLines.FirstBodyVisibleIndex].LineIndex;
var lastIndex = visibleLines[visibleLines.LastBodyVisibleIndex].LineIndex;
Device.BeginInvokeOnMainThread(() => { listView.RefreshListViewItem(firstIndex, lastIndex, false); });
}
else
{
var currentIndex = listView.DataSource.DisplayItems.IndexOf(tappedItemData);
Device.BeginInvokeOnMainThread(() => { listView.RefreshListViewItem(currentIndex, currentIndex, false); });
}
}