/// <summary>
/// Tries to find the binding notifier matching the event.
/// </summary>
/// <param name="eventArgs">The event arguments with the binding name to search for.</param>
/// <returns>Found notifier, or null if no such element could be found.</returns>
private HtmlViewBindingViewNotifier FindViewNotifier(HtmlViewBindingNotifiedEventArgs eventArgs)
{
foreach (IHtmlViewBinding binding in _bindings)
{
HtmlViewBindingViewNotifier viewNotifier = binding.ViewNotifier;
if ((viewNotifier != null) && viewNotifier.Matches(eventArgs.BindingName, eventArgs.EventType))
{
return(viewNotifier);
}
}
return(null);
}
/// <summary>
/// Creates a generic binding between an HTML element and a viewmodel. This method can
/// achieve all behaviours the other bind methods can, but is more complex to use.
/// All parameters are optional and null can be passed.
/// </summary>
/// <typeparam name="T">Type of the binding, use "object" if it is unimportant.</typeparam>
/// <param name="viewSetter">Can write the property to the (HTML) view.</param>
/// <param name="viewNotifier">Informs about changes/clicks in the (HTML) view.</param>
/// <param name="viewmodelGetter">Can read the property from the viewmodel.</param>
/// <param name="viewmodelSetter">Can write the property to the viewmodel.</param>
/// <param name="viewmodelNotifier">Informs about changes in the viewmodel.</param>
/// <param name="bindingMode">The binding mode which defines the direction of the binding.</param>
public void BindGeneric <T>(
Action <T> viewSetter,
HtmlViewBindingViewNotifier viewNotifier,
Func <T> viewmodelGetter,
Action <T> viewmodelSetter,
HtmlViewBindingViewmodelNotifier viewmodelNotifier,
HtmlViewBindingMode bindingMode)
{
var binding = new HtmlViewBinding <T>(
viewSetter, viewNotifier, viewmodelGetter, viewmodelSetter, viewmodelNotifier, bindingMode);
binding.ValidateBindingModeOrThrow();
_bindings.Add(binding);
}
/// <summary>
/// Is triggered when the user started navigating. This is the place we can intercept
/// the navigation.
/// </summary>
/// <param name="sender">The sender of the event or null.</param>
/// <param name="uri">The navigation Uri.</param>
private void NavigatingEventHandler(object sender, string uri)
{
if (_disposed || string.IsNullOrEmpty(uri) || !uri.Contains(JsNamespace))
{
return;
}
// Read parameters from requested url
string queryPart = GetUriQueryPart(uri);
NameValueCollection queryArguments = HttpUtility.ParseQueryString(queryPart);
var arguments = new KeyValueList <string, string>(StringComparer.InvariantCultureIgnoreCase);
foreach (string item in queryArguments)
{
arguments[item] = queryArguments[item];
}
var eventArgs = new HtmlViewBindingNotifiedEventArgs(arguments[BindingAttribute], arguments[EventTypeAttribute], arguments);
if (string.IsNullOrEmpty(eventArgs.EventType))
{
return;
}
HtmlViewBindingViewNotifier notifier = FindViewNotifier(eventArgs);
if (notifier != null)
{
// Matching notifier found, trigger the notifier
notifier.OnNotified(eventArgs.Parameters);
}
else
{
// Raise event to let the controller handle the request
if (UnhandledViewBindingEvent != null)
{
try
{
UnhandledViewBindingEvent(this, eventArgs);
}
catch (Exception)
{
// Todo: We catch the exception because this can freeze the GUI completely. Log it as soon as a log is available.
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="HtmlViewBinding{T}"/> class.
/// </summary>
/// <param name="viewSetter">Can write the property to the (HTML) view.</param>
/// <param name="viewNotifier">Informs about changes/clicks in the (HTML) view.</param>
/// <param name="viewmodelGetter">Can read the property from the viewmodel.</param>
/// <param name="viewmodelSetter">Can write the property to the viewmodel.</param>
/// <param name="viewmodelNotifier">Informs about changes in the viewmodel.</param>
/// <param name="bindingMode">The binding mode which defines the direction of the binding.</param>
public HtmlViewBinding(
Action <T> viewSetter,
HtmlViewBindingViewNotifier viewNotifier,
Func <T> viewmodelGetter,
Action <T> viewmodelSetter,
HtmlViewBindingViewmodelNotifier viewmodelNotifier,
HtmlViewBindingMode bindingMode)
{
_viewSetter = viewSetter;
ViewNotifier = viewNotifier;
_viewmodelGetter = viewmodelGetter;
_viewmodelSetter = viewmodelSetter;
BindingMode = bindingMode;
ViewmodelNotifier = viewmodelNotifier;
if (ViewNotifier != null)
{
ViewNotifier.Notified += ViewNotifiedEventHandler;
}
if (ViewmodelNotifier != null)
{
ViewmodelNotifier.Notified += ViewmodelNotifiedEventHandler;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="CheckboxHtmlViewBinding"/> class.
/// </summary>
/// <param name="viewSetter">Can write the property to the (HTML) view.</param>
/// <param name="viewNotifier">Informs about changes/clicks in the (HTML) view.</param>
/// <param name="viewmodelGetter">Can read the property from the viewmodel.</param>
/// <param name="viewmodelSetter">Can write the property to the viewmodel.</param>
/// <param name="viewmodelNotifier">Informs about changes in the viewmodel.</param>
/// <param name="bindingMode">The binding mode which defines the direction of the binding.</param>
public CheckboxHtmlViewBinding(Action <bool> viewSetter, HtmlViewBindingViewNotifier viewNotifier, Func <bool> viewmodelGetter, Action <bool> viewmodelSetter, HtmlViewBindingViewmodelNotifier viewmodelNotifier, HtmlViewBindingMode bindingMode)
: base(viewSetter, viewNotifier, viewmodelGetter, viewmodelSetter, viewmodelNotifier, bindingMode)
{
}
