public static Task EnableValidationAsync <T, TValue>([NotNull] this T validatableViewModel,
[NotNull] Expression <Func <T, TValue> > getMember)
where T : IValidatorAggregator
{
Should.NotBeNull(validatableViewModel, "validatableViewModel");
return(validatableViewModel.EnableValidationAsync(ToolkitExtensions.GetMemberName(getMember)));
}
public void ProviderShouldTrackPropertyChanges()
{
IEntityStateManager manager = GetStateManager();
var stateModel = GetModel();
var snapshot = manager.CreateSnapshot(stateModel);
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Guid)).ShouldBeFalse();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.String)).ShouldBeFalse();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Int)).ShouldBeFalse();
stateModel.Int = int.MaxValue;
stateModel.String = null;
stateModel.Guid = Guid.Empty;
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Guid)).ShouldBeTrue();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.String)).ShouldBeTrue();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Int)).ShouldBeTrue();
stateModel.Int = IntValue;
stateModel.String = StringValue;
stateModel.Guid = GuidValue;
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Guid)).ShouldBeFalse();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.String)).ShouldBeFalse();
snapshot.HasChanges(stateModel, ToolkitExtensions.GetMemberName <EntityStateModel>(() => model => model.Int)).ShouldBeFalse();
}
private static void Register(IBindingMemberProvider memberProvider)
{
BindingBuilderExtensions.RegisterDefaultBindingMember <Entry>(() => t => t.Text);
BindingBuilderExtensions.RegisterDefaultBindingMember <Label>(() => t => t.Text);
BindingBuilderExtensions.RegisterDefaultBindingMember <Button>("Clicked");
BindingBuilderExtensions.RegisterDefaultBindingMember <ToolbarItem>("Clicked");
BindingBuilderExtensions.RegisterDefaultBindingMember <ListView>(() => c => c.ItemsSource);
BindingBuilderExtensions.RegisterDefaultBindingMember <ProgressBar>(() => c => c.Progress);
//Element
memberProvider.Register(AttachedBindingMember
.CreateMember <Element, object>(AttachedMemberConstants.Parent, GetParentValue, SetParentValue, ObserveParentMember));
memberProvider.Register(typeof(Element), "BindingContext", BindingMemberProvider.BindingContextMember, true);
//VisualElement
var visibleMember = memberProvider.GetBindingMember(typeof(VisualElement),
ToolkitExtensions.GetMemberName <VisualElement>(() => element => element.IsVisible), true, false);
if (visibleMember != null)
{
memberProvider.Register(typeof(VisualElement), "Visible", visibleMember, true);
memberProvider.Register(AttachedBindingMember.CreateMember <VisualElement, bool>("Hidden",
(info, element) => !element.IsVisible, (info, element, arg3) => element.IsVisible = !arg3,
(info, element, arg3) => visibleMember.TryObserve(element, arg3)));
}
memberProvider.Register(AttachedBindingMember
.CreateMember <VisualElement, object>(AttachedMemberConstants.FindByNameMethod, FindByNameMemberImpl));
memberProvider.Register(AttachedBindingMember.CreateMember <VisualElement, bool>(AttachedMemberConstants.Focused, (info, element) => element.IsFocused,
(info, element, arg3) =>
{
if (arg3)
{
element.Focus();
}
else
{
element.Unfocus();
}
}, (info, element, arg3) => BindingServiceProvider.WeakEventManager.Subscribe(element, "IsFocused", arg3)));
var enabledMember = memberProvider.GetBindingMember(typeof(VisualElement),
ToolkitExtensions.GetMemberName <VisualElement>(() => element => element.IsEnabled), true, false);
if (enabledMember != null)
{
memberProvider.Register(typeof(VisualElement), AttachedMemberConstants.Enabled, enabledMember, true);
}
//Toolbar item
enabledMember = memberProvider.GetBindingMember(typeof(ToolbarItem), "IsEnabled", true, false);
if (enabledMember != null)
{
memberProvider.Register(typeof(ToolbarItem), AttachedMemberConstants.Enabled, enabledMember, true);
}
}
protected override void OnHandleAsyncValidationMessage(object sender, AsyncValidationMessage message)
{
if (!string.IsNullOrEmpty(message.PropertyName) && ToolkitExtensions.GetMemberName(Entity, () => model => model.Login) != message.PropertyName)
{
return;
}
Interlocked.Increment(ref _validationLoginCount);
message.Task.TryExecuteSynchronously(task =>
{
Interlocked.Decrement(ref _validationLoginCount);
this.OnPropertyChanged(() => m => m.IsLoginValidating);
});
this.OnPropertyChanged(() => m => m.IsLoginValidating);
}
private static void Register(IBindingMemberProvider memberProvider)
{
//Element
memberProvider.Register(AttachedBindingMember
.CreateMember <Element, object>(AttachedMemberConstants.Parent, GetParentValue, null, ObserveParentMember));
memberProvider.Register(typeof(Element), "BindingContext", BindingMemberProvider.BindingContextMember, true);
//VisualElement
var visibleMember = memberProvider.GetBindingMember(typeof(VisualElement),
ToolkitExtensions.GetMemberName <VisualElement>(element => element.IsVisible), true, false);
if (visibleMember != null)
{
memberProvider.Register(typeof(VisualElement), "Visible", visibleMember, true);
memberProvider.Register(AttachedBindingMember.CreateMember <VisualElement, bool>("Hidden",
(info, element) => !element.IsVisible, (info, element, arg3) => element.IsVisible = !arg3,
(info, element, arg3) => visibleMember.TryObserve(element, arg3)));
}
memberProvider.Register(AttachedBindingMember
.CreateMember <VisualElement, object>(AttachedMemberConstants.FindByNameMethod, FindByNameMemberImpl));
memberProvider.Register(AttachedBindingMember.CreateMember <VisualElement, bool>(AttachedMemberConstants.Focused, (info, element) => element.IsFocused,
(info, element, arg3) =>
{
if (arg3)
{
element.Focus();
}
else
{
element.Unfocus();
}
}, (info, element, arg3) => BindingServiceProvider.WeakEventManager.Subscribe(element, "IsFocused", arg3)));
var enabledMember = memberProvider.GetBindingMember(typeof(VisualElement),
ToolkitExtensions.GetMemberName <VisualElement>(element => element.IsEnabled), true, false);
if (enabledMember != null)
{
memberProvider.Register(typeof(VisualElement), AttachedMemberConstants.Enabled, enabledMember, true);
}
//Toolbar item
enabledMember = memberProvider.GetBindingMember(typeof(ToolbarItem), "IsEnabled", true, false);
if (enabledMember != null)
{
memberProvider.Register(typeof(ToolbarItem), AttachedMemberConstants.Enabled, enabledMember, true);
}
}
/// <summary>
/// Occurs when processing an asynchronous validation message.
/// </summary>
/// <param name="sender">The object that raised the event.</param>
/// <param name="message">Information about event.</param>
protected override void OnHandleAsyncValidationMessage(object sender, AsyncValidationMessage message)
{
if (ToolkitExtensions.GetMemberName(Entity, model => model.Login) != message.PropertyName)
{
return;
}
if (message.IsEndOperation)
{
Interlocked.Decrement(ref _validationLoginCount);
}
else
{
Interlocked.Increment(ref _validationLoginCount);
}
OnPropertyChanged(() => IsLoginValidating);
}
static XamarinFormsBootstrapperBase()
{
MvvmApplication.SetDefaultDesignTimeManager();
if (Device.OS != TargetPlatform.WinPhone)
{
LinkerInclude.Initialize();
}
DynamicMultiViewModelPresenter.CanShowViewModelDefault = CanShowViewModelTabPresenter;
DynamicViewModelNavigationPresenter.CanShowViewModelDefault = CanShowViewModelNavigationPresenter;
ViewManager.ViewCleared += OnViewCleared;
ViewManager.ClearDataContext = true;
var contextName = ToolkitExtensions.GetMemberName <BindableObject>(() => e => e.BindingContext);
BindingServiceProvider.DataContextMemberAliases.Add(contextName);
BindingServiceProvider.BindingMemberPriorities[contextName] = BindingServiceProvider.DataContextMemberPriority;
}
/// <summary>
/// Sets errors for a property
/// </summary>
/// <param name="propertyExpresssion">The expression for the property</param>
/// <param name="errors">The collection of errors</param>
public void SetErrors <TValue>(Expression <Func <T, TValue> > propertyExpresssion, params object[] errors)
{
UpdateErrors(ToolkitExtensions.GetMemberName(propertyExpresssion), errors, false);
}
protected Task ValidateAsync <T>(Expression <Func <T> > getProperty)
{
Should.NotBeNull(getProperty, "getProperty");
return(ValidateAsync(ToolkitExtensions.GetMemberName(getProperty)));
}
public void SetStringProperty <TValue>(Expression <Func <TWrapper, TValue> > propertyName, string value, Func <string, object> convertAction = null)
{
SetStringProperty(ToolkitExtensions.GetMemberName(propertyName), value, convertAction);
}
public void SetBoolProperty <TValue>(Expression <Func <TWrapper, TValue> > propertyName, string value)
{
SetBoolProperty(ToolkitExtensions.GetMemberName(propertyName), value);
}
public void SetBinding <TValue>(Expression <Func <TWrapper, TValue> > propertyName, string value, bool required)
{
SetBinding(ToolkitExtensions.GetMemberName(propertyName), value, required);
}
protected static string GetPropertyName <T>(Expression <Func <T, object> > expression)
{
return(ToolkitExtensions.GetMemberName(expression));
}
