/// <summary>
/// Execute a modal dialog, and wait for it to close.
/// </summary>
public Task <TResult> ExecuteModalTemplateAsync <TModel, TResult>(ModalTemplate <TModel, TResult> template, TModel model, TResult initialResult, CancellationToken cancellationToken = default)
{
if (IsModalActive(template))
{
throw new Exception("Modal already active");
}
var completionSource = new TaskCompletionSource <TResult>();
var obj = new object();
var context = new ModalTemplate <TModel, TResult> .ModalContext(model, initialResult, result =>
{
//notify modal container
var modal = ActiveModals.FirstOrDefault(m => m.Template == template);
ActiveModals.Remove(modal);
OnModalClose?.Invoke(template, new ModalEventArgs
{
Modal = modal
});
if (completionSource.Task.IsCompleted)
{
throw new Exception("Trying to close modal twice!");
}
//complete task
completionSource.SetResult(result);
}, ModalStateHasChanged, cancellationToken);
//render fragment;
var newModal = new ActiveModal()
{
Type = null,
Template = template,
ModalBody = template.ChildContent(context),
};
ActiveModals.Add(newModal);
//notify modal container
OnModalShow?.Invoke(template, new ModalEventArgs
{
Modal = newModal,
});
//return task, which completes when the modal closes
return(completionSource.Task);
}
public Task ShowAsync <TModel>(TModel model)
{
model.ThrowIfNull();
if (ActiveModal != null)
{
throw new ApplicationException("Another modal is already active.");
}
var completionSource = new TaskCompletionSource <object?>();
var modelType = typeof(TModel);
if (!_modelComponentMapping.TryGetValue(modelType, out var componentType))
{
throw new ApplicationException($"No component for model '{modelType.Name}' found.");
}
ActiveModal = new ModalState(componentType, model !);
ActiveModal.Closed += OnClosed;
StateChanged?.Invoke();
return(completionSource.Task);
// Local event handler
void OnClosed(ModalState state)
{
// Unsubscribe to all trigger and dispose toast
state.Closed -= OnClosed;
// Reset active dialog field
ActiveModal.Dispose();
ActiveModal = null;
StateChanged?.Invoke();
completionSource.SetResult(null);
}
}
public Task <TResult> ExecuteModalComponentAsync <TComponent, TModel, TResult>(TModel model, CancellationToken cancellationToken = default) where TComponent : ModalComponentBase <TComponent, TModel, TResult>
{
var modalComponent = typeof(TComponent);
var completionSource = new TaskCompletionSource <TResult>();
var obj = new object();
var context = new ModalComponentBase <TComponent, TModel, TResult> .ModalContext(result =>
{
//notify modal container
var modal = ActiveModals.FirstOrDefault(m => m.Type == modalComponent);
ActiveModals.Remove(modal);
OnModalClose?.Invoke(modalComponent, new ModalEventArgs
{
Modal = modal
});
if (completionSource.Task.IsCompleted)
{
throw new Exception("Trying to close modal twice!");
}
//complete task
completionSource.SetResult(result);
}, ModalStateHasChanged, cancellationToken);
//render fragment;
ActiveModal newModal = new ActiveModal()
{
Type = modalComponent,
Template = null,
};
newModal.ModalBody = (builder) =>
{
builder.OpenComponent <TComponent>(0);
builder.AddAttribute(1, "Context", context);
builder.AddAttribute(2, "Model", model);
builder.AddComponentReferenceCapture(3, value =>
{
var template = value as IModalTemplate;
if (template != newModal.Template)
{
newModal.Template = value as IModalTemplate;
//redraw modal container in order to get css class from modal template instance
ModalStateHasChanged();
}
});
builder.CloseComponent();
};
ActiveModals.Add(newModal);
//notify modal container
OnModalShow?.Invoke(modalComponent, new ModalEventArgs
{
Modal = newModal,
});
//return task, which completes when the modal closes
return(completionSource.Task);
}
