public void Execute()
{
var src = new Person();
using (var dest = new DelegateCommand(
() => src.Name = "Done",
() => src.Age > 0
)) {
var count = 0;
dest.Refresh();
dest.CanExecuteChanged += (s, e) => ++ count;
dest.Associate(src);
Assert.That(dest.CanExecute(), Is.False);
Assert.That(count, Is.EqualTo(0));
src.Age = 10;
Assert.That(dest.CanExecute(), Is.True);
Assert.That(count, Is.EqualTo(1));
src.Age = -20;
Assert.That(dest.CanExecute(), Is.False);
Assert.That(count, Is.EqualTo(2));
dest.Refresh();
dest.Execute();
Assert.That(src.Name, Is.EqualTo("Done"));
Assert.That(count, Is.EqualTo(4));
}
}
public void Execute_Generic()
{
var src = new Person();
using (var dest = new DelegateCommand <int>(
e => src.Name = $"Done:{e}",
e => e > 0 && src.Age > 0
)) {
var count = 0;
dest.Refresh();
dest.CanExecuteChanged += (s, e) => ++ count;
dest.Associate(src);
Assert.That(dest.CanExecute(-10), Is.False);
Assert.That(dest.CanExecute(10), Is.False);
Assert.That(count, Is.EqualTo(0));
src.Age = 10;
Assert.That(dest.CanExecute(-20), Is.False);
Assert.That(dest.CanExecute(20), Is.True);
Assert.That(count, Is.EqualTo(1));
src.Age = -20;
Assert.That(dest.CanExecute(-30), Is.False);
Assert.That(dest.CanExecute(30), Is.False);
Assert.That(count, Is.EqualTo(2));
dest.Refresh();
dest.Execute(40);
Assert.That(src.Name, Is.EqualTo("Done:40"));
Assert.That(count, Is.EqualTo(4));
}
}
/* ----------------------------------------------------------------- */
///
/// GetOkCommand
///
/// <summary>
/// Gets the OK command.
/// </summary>
///
/* ----------------------------------------------------------------- */
private ICommand GetOkCommand(Action <int, IEnumerable <FileItem> > callback)
{
var dest = new DelegateCommand(
() => {
Send <CloseMessage>();
callback?.Invoke(Value.Index, Value.Files);
},
() => Value.Files.Count > 0
);
Value.Files.CollectionChanged += (s, e) => dest.Refresh();
return(dest);
}
protected override void AfterPropertyChanged(string propertyName)
{
base.AfterPropertyChanged(propertyName);
mAcceptCommand.Refresh();
}
public MainPageViewModel(IServiceProvider serviceProvider, AppViewModel appViewModel)
: base(serviceProvider, appViewModel)
{
m_connectionInfoProperty = CreateDictionaryProperty(() => ConnectionInfo, () => null);
m_connectionInfoTaskStatusProperty = CreateDictionaryProperty(() => ConnectionInfoTaskStatus, () => TaskStatus.Created);
m_dhcpInfoProperty = CreateDictionaryProperty(() => DhcpInfo, () => null);
m_dhcpInfoTaskStatusProperty = CreateDictionaryProperty(() => DhcpInfoTaskStatus, () => TaskStatus.Created);
m_externalAddressProperty = CreateDictionaryProperty(() => ExternalAddress, () => null);
m_externalAddressTaskStatusProperty = CreateDictionaryProperty(() => ExternalAddressTaskStatus, () => TaskStatus.Created);
m_statusProperty = CreateDictionaryProperty(() => Status, () => String.Empty);
m_progressPercentProperty = CreateDictionaryProperty(() => ProgressPercent, () => 0.0d);
m_isScanInProgressProperty = CreateDictionaryProperty(() => IsScanInProgress, () => false);
m_customSelectionCommandsProperty = CreateDictionaryProperty(() => CustomSelectionCommands, () => new ObservableCollection <UICommand>());
m_startAddressValueProperty = CreateSettingsProperty(V1SettingsConstants.StartAddressValueKey, () => StartAddressValue, () => 0u, () => { UpdateActionBarControls(); });
m_isStartAddressValidProperty = CreateDictionaryProperty(() => IsStartAddressValid, () => false);
m_endAddressValueProperty = CreateSettingsProperty(V1SettingsConstants.EndAddressValueKey, () => EndAddressValue, () => 0u, () => { UpdateActionBarControls(); });
m_isEndAddressValidProperty = CreateDictionaryProperty(() => IsEndAddressValid, () => false);
var hostInfoService = ServiceProvider.GetService <IHostInfoService>();
var hostInfo = hostInfoService.GetCurrentHostInfo();
if (hostInfo == null)
{
Status = Strings.Status_GetHostInfoFailed;
}
else
{
var connectionInfoTask = RunGetConnectionInfoAsync(hostInfo);
var dhcpInfoTask = RunGetDhcpInfoAsync(hostInfo);
var externalAddressTask = RunGetExternalAddressAsync();
Task.Factory.ContinueWhenAll(new[] { connectionInfoTask, dhcpInfoTask }, t =>
{
if (ConnectionInfo != null)
{
if (DhcpInfo != null && DhcpInfo.DnsServerAddress != null)
{
m_dnsResolver = new UdpDnsResolver(
new DnsResolverOptions(),
new DatagramSocketFactory(),
new IPEndpoint(DhcpInfo.DnsServerAddress, Constants.DefaultDnsPort));
}
SetAddressValues(ConnectionInfo.Network);
IsScanInProgress = false;
m_isScanCommandEnabled = true;
m_scanCommand.Refresh();
m_isCancelScanCommandEnabled = false;
m_cancelScanCommand.Refresh();
}
},
CancellationToken.None,
TaskContinuationOptions.None,
TaskScheduler.FromCurrentSynchronizationContext());
}
m_scanCommand = new DelegateCommand(async() =>
{
var scanStopwatch = new Stopwatch();
scanStopwatch.Start();
m_tokenSource = new CancellationTokenSource();
AvailableServices.Clear();
IsScanInProgress = true;
m_isScanCommandEnabled = false;
m_scanCommand.Refresh();
m_isCancelScanCommandEnabled = true;
m_cancelScanCommand.Refresh();
Status = Strings.Status_ScanStarted;
var selectedAddresses = new IPAddressRange(StartAddressValue, EndAddressValue);
var networkServices = await GetNetworkServicesAsync();
var index = 0;
var progress = (IProgress <ScanNetworkBatch>) new Progress <ScanNetworkBatch>(batch =>
{
foreach (var result in batch.Results)
{
if (result.IsAvailable)
{
AvailableServices.Add(result);
}
}
index += batch.Results.Count;
ProgressPercent = 100.0d * index / (selectedAddresses.Count * networkServices.Length);
});
var task = Task.Factory.StartNew(
arg => { Scanner.ScanNetwork(m_tokenSource.Token, m_dnsResolver, selectedAddresses, networkServices, progress); },
m_tokenSource.Token,
TaskCreationOptions.None);
var t1 = task.ContinueWith(t =>
{
IsScanInProgress = false;
m_isScanCommandEnabled = true;
m_scanCommand.Refresh();
m_isCancelScanCommandEnabled = false;
m_cancelScanCommand.Refresh();
var isCancelled = m_tokenSource.Token.IsCancellationRequested;
if (isCancelled)
{
Status = Strings.Status_ScanCancelled;
ProgressPercent = 0.0d;
}
else
{
scanStopwatch.Stop();
var timeSpan = scanStopwatch.Elapsed;
Status = Strings.Format_Status_ScanCompleted(timeSpan);
ProgressPercent = 100.0d;
}
m_tokenSource.Dispose();
},
CancellationToken.None,
TaskContinuationOptions.None,
TaskScheduler.FromCurrentSynchronizationContext());
},
() => m_isScanCommandEnabled);
m_cancelScanCommand = new DelegateCommand(() =>
{
m_isCancelScanCommandEnabled = false;
m_cancelScanCommand.Refresh();
m_tokenSource.Cancel();
},
() => m_isCancelScanCommandEnabled);
m_showServicesCommand = new DelegateCommand(() =>
{
AppViewModel.NavigateToServicesPage();
});
m_launchUriCommand = new DelegateCommand <IPEndpoint>(endpoint =>
{
AppViewModel.NavigateToBrowserPage(endpoint);
});
}
private void OnSelectedUserServicesCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
m_removeUserServiceCommand.Refresh();
}
protected override void InternalOnListChanged(ListChangedType type)
{
base.InternalOnListChanged(type);
mApplyCommand.Refresh();
}