//Called if user taps a row (as opposed to programatically changing the selection)
private void PlanetListView_ItemTapped(object sender, ItemTappedEventArgs e)
{
SolPlanet item = (SolPlanet)e.Item;
int selectedRow = e.ItemIndex;
vm.UserTappedList(row: selectedRow, planet: item);
}
public PlanetDetailViewModel(SolPlanet p, INavigation nav) : base(nav)
{
//Keep a reference to the original
_original = p;
//Make an indepednent copy
Model = new SolPlanet(p);
//Commands
SaveCommand = new Command(execute: () =>
{
//Note if the group needs changing
bool hasMovedGroup = (_original.Explored != Model.Explored);
//Update the original planet data (mutable reference type)
_original.Copy(Model);
//Message back if the group has changed
if (hasMovedGroup)
{
MessagingCenter.Send(this, "PlanetUpdated", _original);
}
//Navigate back
_ = Navigation.PopAsync();
});
}
//Called if the item selection changes (by any means)
private void PlanetListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
//If nothing is selected, there is nothing to do
if (e.SelectedItem == null)
{
return;
}
//Extract data
SolPlanet item = (SolPlanet)e.SelectedItem;
int selectedRow = e.SelectedItemIndex;
//Update ViewModel
vm.ItemSelectionChanged(row: selectedRow, planet: item);
}
public PlanetDetailViewModel(SolPlanet p, INavigation nav) : base(nav)
{
//Keep a reference to the original
_original = p;
//Make an indepednent copy
Model = new SolPlanet(p);
//Commands
SaveCommand = new Command(execute: () =>
{
Save();
_ = Navigation.PopAsync();
});
}