public static ValueChangedRich <bool> BindEnableAndInitializeAsObserving <T>(
this IActionModel <T> model, Action <AggregatedErrorsValue <bool> > observes)
{
var isEnabled = new AggregatedErrorsValue <bool>(false, self => !self.Errors.Any(), observes);
return(BindEnableAndInitialize(model, isEnabled));
}
public static Action BindSelectionIntoEnabled <ActionT, ItemT>(
this IActionModel <ActionT> model, DataGridModel <ItemT> datagrid, SelectionNeeded mode, RowFilter <ItemT> extraRowFilterOrNull = null)
{
void UpdateEnabled()
{
bool enabled;
switch (mode)
{
case SelectionNeeded.AtLeastOneSelected:
enabled = datagrid.Selected.Length >= 1;
break;
case SelectionNeeded.ExactlyOneSelected:
enabled = datagrid.Selected.Length == 1;
break;
default:
throw new Exception("unsupported selectionNeeded");
}
if (!enabled)
{
switch (mode)
{
case SelectionNeeded.AtLeastOneSelected:
model.ChangeEnabled(false, new[] { I18n.Translate("Need at least one row selected") }, true);
break;
case SelectionNeeded.ExactlyOneSelected:
model.ChangeEnabled(false, new[] { I18n.Translate("Need exactly one row selected") }, true);
break;
default:
throw new Exception("unsupported selectionNeeded");
}
return;
}
if (extraRowFilterOrNull == null)
{
model.ChangeEnabled(true, new string[] { }, true);
return;
}
if (datagrid.Selected.Length != datagrid.Selected.Where(extraRowFilterOrNull.Filter).Count())
{
model.ChangeEnabled(false, new[] { extraRowFilterOrNull.UserFriendlyReason }, true);
return;
}
model.ChangeEnabled(true, new string[] { }, true);
}
datagrid.Selected.Changed += (_, __, ___) => UpdateEnabled();
UpdateEnabled();
return(UpdateEnabled);
}
private MenuItemUserModel(
IReadOnlyValue <string> label, IActionModel <Unit> actionOrNull,
IEnumerable <MenuItemUserModel> subItemsOrNull, bool isExitItem, string descriptionOrNull)
{
Action = actionOrNull;
DescriptionOrNull = descriptionOrNull;
Label = label;
Items = subItemsOrNull;
IsExit = isExitItem;
}
public static ValueChangedRich <bool> BindEnableAndInitialize <T>(this IActionModel <T> model, IReadOnlyValue <bool> validator)
{
void Handler(object sender, bool oldValue, bool newValue, IEnumerable <string> errors, bool isUserAction)
{
model.ChangeEnabled(newValue, errors, isUserAction);
Logger.Debug(typeof(ActionModelExtensions), "IActionModelExtensions->BindEnableAndInitialize set enable to {0}", newValue);
}
validator.Changed += Handler;
Handler(validator, validator.Value, validator.Value, validator.Errors, false);
return(Handler);
}
// REVIEW: valuetuple
public static Tuple <ValueChangedRich <bool>, Action> BindAction <WidgetT, T>(this IActionView <WidgetT> view, IActionModel <T> domain)
{
ValueChangedRich <bool> domainHandler = (sender, oldValue, newValue, errors, isUserAction) => {
Logger.Debug(typeof(ActionViewExtensions), "BindAction: changing view to {0} and {1}", newValue, errors.PrettyToString());
view.Enabled = newValue;
view.DisabledReason = new HashSet <string>(errors);
};
domain.EnabledChanged += domainHandler;
Action viewHandler = async() => {
Logger.Debug(typeof(ActionViewExtensions), "BindAction: triggering enabled?={0} action {1} from view {2}", domain.Enabled, domain, view);
if (!domain.Enabled)
{
return;
}
view.State = ActionViewState.CreateOperationRunning();
view.Enabled = false;
view.DisabledReason = new HashSet <string> {
I18n.Translate("Please wait while operation is running...")
};
try {
await domain.Trigger();
view.State = ActionViewState.CreateIdleOrSuccess();
} catch (Exception ex) {
Logger.Error(typeof(ActionViewExtensions), "Bound action failed to execute {0}", ex);
view.State = ActionViewState.CreateOperationFailed(ex);
//should be handled by domain.ActionExecuted subscribers
} finally {
view.Enabled = domain.Enabled;
view.DisabledReason = new HashSet <string>(domain.DisabledReasons);
}
};
view.Triggered += viewHandler;
return(new Tuple <ValueChangedRich <bool>, Action>(domainHandler, viewHandler));
}
public static Tuple <ValueChangedRich <bool>, Action> BindActionAndInitialize <WidgetT, T>(this IActionView <WidgetT> view, IActionModel <T> domain)
{
view.OpensNewTab = domain.ResultInNewTab;
var handlers = view.BindAction(domain);
handlers.Item1(domain, domain.Enabled, domain.Enabled, domain.DisabledReasons, false);
return(handlers);
}
