private IEnumerable <GeneratorInfo> GetGeneratorsFromContainer(PolygonGeneratorProvider generatorProvider) =>
generatorProvider.GetGenerators()
.Select(g => new GeneratorInfo(this,
(g.GetType()
.GetCustomAttributes(typeof(FriendlyNameAttribute), true)
.FirstOrDefault() as FriendlyNameAttribute)?.FriendlyName ?? g.GetType().Name,
g));
public PolygonManagementViewModel(PolygonGeneratorProvider generatorProvider = null,
IDialogHandler dialogHandler = null,
PolygonClipper clipper = null,
AreaCalculator areaCalculator = null)
{
Polygons = new ObservableCollection <Polygon>();
DialogHandler = dialogHandler;
Clipper = clipper;
AreaCalculator = areaCalculator;
GenerateAndAddPolygonCommand = new DelegateCommand(
GenerateAndAddPolygon,
() => SelectedPolygonGenerator != null);
ClipPolygonsCommand = new DelegateCommand(
ClipPolygons,
() => Polygons.Count == 2 && Clipper != null);
Polygons.CollectionChanged += (_, __) => ClipPolygonsCommand.RaiseCanExecuteChanged();
CalculateAreaForSelectedPolygonCommand = new DelegateCommand(
CalculateAreaForSelectedPolygon,
() => SelectedPolygon != null && !IsCalculatingArea && AreaCalculator != null);
CancelAreaCalculationCommand = new DelegateCommand(
() => CancelSource.Cancel(),
() => IsCalculatingArea);
if (generatorProvider != null)
{
Generators = GetGeneratorsFromContainer(generatorProvider);
SelectedPolygonGenerator = Generators.LastOrDefault()?.Generator;
}
MouseCommand = new DelegateCommand <Polygon>((x) => SelectedPolygon = x);
}
