/// <summary>
/// Creates an <see cref="ObservableValue{TValue}"/> available as a property via data binding,
/// and affected by two commands also available via data binding.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="viewModel"></param>
/// <param name="propertyName"></param>
/// <param name="command1Name"></param>
/// <param name="command2Name"></param>
/// <param name="inputObservableSelector"></param>
/// <param name="initialValue"></param>
/// <returns></returns>
public static ObservableValue <TValue> CreateActiveProperty <TValue>(
this BaseViewModel viewModel,
string propertyName,
string command1Name,
string command2Name,
Func <IObservable <Unit>, IObservable <Unit>, IObservable <TValue> > inputObservableSelector,
TValue initialValue = default)
{
var command1 = viewModel.CreateObservableCommand(command1Name);
var command2 = viewModel.CreateObservableCommand(command2Name);
return(viewModel.CreateProperty <TValue>(
propertyName,
() => inputObservableSelector(command1, command2),
initialValue));
}
/// <summary>
/// Creates an <see cref="ObservableValue{TValue}"/> available as a property via data binding,
/// and affected by four commands respectively accepting <typeparamref name="TParam1"/>,
/// <typeparamref name="TParam2"/>, <typeparamref name="TParam3"/> and
/// <typeparamref name="TParam4"/> parameters also available via data binding.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <typeparam name="TParam1"></typeparam>
/// <typeparam name="TParam2"></typeparam>
/// <typeparam name="TParam3"></typeparam>
/// <typeparam name="TParam4"></typeparam>
/// <param name="viewModel"></param>
/// <param name="propertyName"></param>
/// <param name="command1Name"></param>
/// <param name="command2Name"></param>
/// <param name="command3Name"></param>
/// <param name="command4Name"></param>
/// <param name="inputObservableSelector"></param>
/// <param name="initialValue"></param>
/// <returns></returns>
public static ObservableValue <TValue> CreateActiveProperty <TValue, TParam1, TParam2, TParam3, TParam4>(
this BaseViewModel viewModel,
string propertyName,
string command1Name,
string command2Name,
string command3Name,
string command4Name,
Func <IObservable <TParam1>, IObservable <TParam2>, IObservable <TParam3>, IObservable <TParam4>, IObservable <TValue> > inputObservableSelector,
TValue initialValue = default)
{
var command1 = viewModel.CreateObservableCommand <TParam1>(command1Name);
var command2 = viewModel.CreateObservableCommand <TParam2>(command2Name);
var command3 = viewModel.CreateObservableCommand <TParam3>(command3Name);
var command4 = viewModel.CreateObservableCommand <TParam4>(command4Name);
return(viewModel.CreateProperty(
propertyName,
() => inputObservableSelector(command1, command2, command3, command4),
initialValue));
}
/// <summary>
/// Creates an <see cref="ObservableValue{TValue}"/> available as a property via data binding,
/// and affected by a command accepting a <typeparamref name="TParam"/> parameter also
/// available via data binding, with an observable that determines if execution permission must
/// be re-evaluated from a can execute function.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <typeparam name="TParam"></typeparam>
/// <param name="viewModel"></param>
/// <param name="propertyName"></param>
/// <param name="command1Name"></param>
/// <param name="inputObservableSelector"></param>
/// <param name="initialValue"></param>
/// <returns></returns>
public static ObservableValue <TValue> CreateActiveProperty <TValue, TParam>(
this BaseViewModel viewModel,
string propertyName,
string command1Name,
Func <IObservable <TParam>, IObservable <TValue> > inputObservableSelector,
Func <TParam, bool> canExecuteFunc,
IObservable <Unit> canExecuteChangedObservable,
TValue initialValue = default)
{
var command1 = viewModel.CreateObservableCommand <TParam>(command1Name, canExecuteFunc, canExecuteChangedObservable);
return(viewModel.CreateProperty <TValue>(
propertyName,
() => inputObservableSelector(command1),
initialValue));
}
/// <summary>
/// Creates an <see cref="ObservableValue{TValue}"/> available as a property via data binding,
/// and affected by a command accepting a <typeparamref name="TParam"/> parameter also
/// available via data binding, with an observable that determines if it can be executed. You
/// can optionally expose that observable via a "Can" + commandName property.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <typeparam name="TParam"></typeparam>
/// <param name="viewModel"></param>
/// <param name="propertyName"></param>
/// <param name="commandName"></param>
/// <param name="inputObservableSelector"></param>
/// <param name="canExecuteObservable"></param>
/// <param name="initialValue"></param>
/// <param name="includeCanProperty"></param>
/// <returns></returns>
public static ObservableValue <TValue> CreateActiveProperty <TValue, TParam>(
this BaseViewModel viewModel,
string propertyName,
string commandName,
Func <IObservable <TParam>, IObservable <TValue> > inputObservableSelector,
IObservable <bool> canExecuteObservable,
TValue initialValue = default,
bool includeCanProperty = false)
{
var command = viewModel.CreateObservableCommand <TParam>(commandName, canExecuteObservable, includeCanProperty);
return(viewModel.CreateProperty <TValue>(
propertyName,
() => inputObservableSelector(command),
initialValue));
}
/// <summary>
/// Creates an <see cref="IObservableCommand{Unit}"/>, which ignores any parameter, available via data binding.
/// </summary>
/// <param name="viewModel"></param>
/// <param name="name"></param>
/// <returns></returns>
public static IObservableCommand <Unit> CreateObservableCommand(this BaseViewModel viewModel, string name)
{
return(viewModel.CreateObservableCommand <Unit>(name));
}