private bool OnSelectNewItemCanExecute(IStepBarItem item)
{
if (item is null)
{
return(false);
}
// Demo case 1: allow when visited
if (Enum <StepBarItemStates> .Flags.IsFlagSet(item.State, StepBarItemStates.IsVisited))
{
return(true);
}
// Demo case 2: allow when "lower" page
var selectedItem = SelectedItem;
if (selectedItem is not null)
{
if (item.Number < selectedItem.Number)
{
return(true);
}
}
return(false);
}
public static void Selection(Automation.StepBar target, IStepBarItem selectedItem,
Func <IStepBarItem, IStepBarItem, bool> itemComparer)
{
var model = target.Current;
var items = model.Items;
Assert.That(model.SelectedItem, Is.EqualTo(selectedItem)
.Using <IStepBarItem>(itemComparer));
Assert.That(target.SelectedItem?.Current.DataContext, Is.EqualTo(selectedItem)
.Using <IStepBarItem>(itemComparer));
var count = items.Count;
var selectedIndex = 0;
for (var i = 0; i < count; i++)
{
if (itemComparer.Invoke(items[i], selectedItem))
{
selectedIndex = i;
break;
}
}
var expectedStates = new StepBarItemStates[count];
expectedStates[0] = StepBarItemStates.IsVisited;
for (var i = 1; i < selectedIndex; i++)
{
expectedStates[i] = StepBarItemStates.IsBeforeCurrent;
}
expectedStates[selectedIndex] = StepBarItemStates.IsVisited | StepBarItemStates.IsCurrent;
for (var i = selectedIndex + 1; i < count - 1; i++)
{
expectedStates[i] = StepBarItemStates.None;
}
expectedStates[count - 1] |= StepBarItemStates.IsLast;
for (var i = 0; i < count; i++)
{
var expectedItem = expectedStates[i];
var item = items[i];
Assert.That(item.State.HasFlag(expectedItem));
}
}
private void UpdateSelection()
{
var items = Items;
if (items is not null)
{
if (items.Count > 0)
{
var lastItem = items.Last();
lastItem.State = Enum <StepBarItemStates> .Flags.SetFlag(lastItem.State, StepBarItemStates.IsLast);
}
}
SelectedItem = items?.FirstOrDefault();
}
protected override async Task InitializeAsync()
{
await base.InitializeAsync();
var items = new List <IStepBarItem>();
for (var i = 0; i < 10; i++)
{
items.Add(new StepBarItemModel
{
Title = $"Item {i + 1}",
Number = i + 1,
Command = SelectNewItem
});
}
Items = items;
SelectedItem = items.FirstOrDefault();
}
private static bool CompareItems(IStepBarItem x, IStepBarItem y)
{
return(string.Equals(x?.Title, y?.Title) &&
string.Equals(x?.Description, y?.Description) &&
Equals(x?.Number, y?.Number));
}
private async Task OnSelectNewItemExecuteAsync(IStepBarItem item)
{
SelectedItem = item;
}
public StepBarItemViewModel(IStepBarItem stepBarItem)
{
Item = stepBarItem;
}
