public Task <List <int> > ShowMultipleChoice(DialogServiceMultiItemsBundle bundle)
{
var tcs = new TaskCompletionSource <List <int> >();
// Attempt to re-use last dialog to increate performance
// If only the title is different, we can still re-use it
if (LastBundle.SameValuesAs(bundle) == false &&
LastBundle.SameItemsAs(bundle) &&
LastBundle.SameCheckedItemsAs(bundle))
{
_lastMultipleChoiceDialog.SetTitle(bundle.Title);
UpdateTaskCompletionSource(_lastMultipleChoiceDialog, LastBundle, tcs);
}
else
{
var builder = new AlertDialog.Builder(CurrentContext);
ConfigureBuilder(builder, bundle, tcs);
_lastMultipleChoiceDialog = builder.Create();
}
LastBundle = bundle;
try
{
_lastMultipleChoiceDialog.Show();
}
catch (Exception ex)
{
Console.WriteLine("ERROR: " + ex.ToString());
throw ex;
}
return(tcs.Task);
}
public MultiChoiceViewController(DialogServiceMultiItemsBundle bundle, Action <List <int> > onComplete)
{
if (string.IsNullOrEmpty(bundle.Title) == false)
{
this.Title = bundle.Title;
}
_bundle = bundle;
_onComplete = onComplete;
}
private static DialogServiceMultiItemsBundle Factory(DialogServiceMultiItem[] myItems)
{
string _title = "title";
DialogServiceMultiItem[] _items = myItems;
bool[] _checkedItems = new[] { true, false, false };
string _positiveLabel = "Okk";
var sut = new DialogServiceMultiItemsBundle(_title, _items, _checkedItems, _positiveLabel);
return(sut);
}
private static DialogServiceMultiItemsBundle Factory()
{
var myItems = new List <DialogServiceMultiItem>();
myItems.Add(new DialogServiceMultiItem("a", "blabla blabla"));
myItems.Add(new DialogServiceMultiItem("b", "blabla blabla"));
myItems.Add(new DialogServiceMultiItem("c", "blabla blabla"));
myItems.Add(new DialogServiceMultiItem("d", "blabla blabla"));
DialogServiceMultiItemsBundle sut = Factory(myItems.ToArray());
return(sut);
}
private static List <int> GetIndexOfCheckedItems(DialogServiceMultiItemsBundle bundle)
{
var checkedItemsIndex = new List <int>();
for (int i = 0; i < bundle.CheckedItems.Length; i++)
{
var hero = bundle.CheckedItems[i];
if (hero == true)
{
checkedItemsIndex.Add(i);
}
}
return(checkedItemsIndex);
}
private async Task DoShowListCommandAsync(string title)
{
var stuff = await _fetcher.FetchAsync(new Uri("https://www.google.com"));
var bundle = new DialogServiceMultiItemsBundle(title, _allItems, _checkedItems.ToArray());
var result = await _dialog.ShowMultipleChoice(bundle);
for (int i = 0; i < _checkedItems.Count; i++)
{
_checkedItems[i] = false;
}
foreach (var index in result)
{
_checkedItems[index] = true;
}
}
private void ConfigureBuilder(AlertDialog.Builder builder, DialogServiceMultiItemsBundle bundle, TaskCompletionSource <List <int> > tcs)
{
var checkedItemsIndex = GetIndexOfCheckedItems(bundle);
var orgCheckedItemsIndex = new List <int>(checkedItemsIndex);
builder.SetTitle(bundle.Title);
var titles = bundle.Items.Select(x => x.Title).ToArray();
builder.SetMultiChoiceItems(titles, bundle.CheckedItems, (sender, e) =>
{
if (e.IsChecked)
{
checkedItemsIndex.Add(e.Which);
}
else if (checkedItemsIndex.Contains(e.Which))
{
checkedItemsIndex.Remove(e.Which);
}
});
builder.SetPositiveButton(bundle.PositiveLabel, (sender, e) =>
{
if (tcs.TrySetResult(checkedItemsIndex) == false)
{
Console.WriteLine("Unable to set CHECKED_ITEMS result in builder");
}
});
builder.SetNegativeButton(bundle.NegativeLabel, (sender, e) =>
{
if (tcs.TrySetResult(orgCheckedItemsIndex) == false)
{
Console.WriteLine("Unable to set ORG_CHECKED_ITEMS result in builder");
}
});
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.JellyBeanMr1)
{
builder.SetOnDismissListener(new MyDismissListener(tcs, orgCheckedItemsIndex));
}
}
private void UpdateTaskCompletionSource(AlertDialog dialog, DialogServiceMultiItemsBundle bundle, TaskCompletionSource <List <int> > tcs)
{
var checkedItemsIndex = GetIndexOfCheckedItems(bundle);
var orgCheckedItemsIndex = new List <int>(checkedItemsIndex);
dialog.SetButton((int)DialogButtonType.Positive, bundle.PositiveLabel, (sender, e) =>
{
if (tcs.TrySetResult(checkedItemsIndex) == false)
{
Console.WriteLine("Unable to set CHECKED_ITEMS result in update tcs");
}
});
dialog.SetButton((int)DialogButtonType.Negative, bundle.PositiveLabel, (sender, e) =>
{
if (tcs.TrySetResult(orgCheckedItemsIndex) == false)
{
Console.WriteLine("Unable to set ORG_CHECKED_ITEMS result in update tcs");
}
});
dialog.SetOnDismissListener(new MyDismissListener(tcs, orgCheckedItemsIndex));
}
public Task <List <int> > ShowMultipleChoice(DialogServiceMultiItemsBundle bundle)
{
var tcs = new TaskCompletionSource <List <int> >();
LastBundle = bundle;
var navigationController = (Mvx.Resolve <IMvxIosViewPresenter>() as MvxIosViewPresenter).MasterNavigationController;
var multiChoiceController = new MultiChoiceViewController(LastBundle, (selectedItems) =>
{
tcs.SetResult(selectedItems);
});
multiChoiceController.View.BackgroundColor = UIColor.White;
multiChoiceController.ModalTransitionStyle = UIModalTransitionStyle.CoverVertical;
multiChoiceController.ModalPresentationStyle = UIModalPresentationStyle.FormSheet;
navigationController.VisibleViewController.PresentViewController(multiChoiceController, true, null);
return(tcs.Task);
}
