private static async Task InitialisePage <TPage>(TPage page, YamvvmViewModel vm) where TPage : YamvvmPage, new()
{
if (vm != null)
{
page.BindingContext = vm;
await InitialisePageViewModel(page, vm);
}
}
/// <summary>
/// Set MainPage to a Master Detail page container.
/// Also initializes all viewmodels.
/// </summary>
/// <typeparam name="TPage">Must be of type TabbedPage.</typeparam>
/// <returns></returns>
public static async Task SetMasterDetailPage <TMasterPage, TDetailPage>(int pageIndex = 0,
YamvvmViewModel masterDetailViewModel = null,
PageViewModel masterViewModel = null,
PageViewModel detailViewModel = null)
where TMasterPage : YamvvmPage, new()
where TDetailPage : YamvvmPage, new()
{
MasterDetailPage masterDetailPage = new MasterDetailPage();
TMasterPage masterPage = new TMasterPage();
TDetailPage detailsPage = new TDetailPage();
masterDetailPage.Master = masterPage;
masterDetailPage.Detail = new NavigationPage(detailsPage);
var initTasks = new List <Task>();
if (masterDetailViewModel != null)
{
masterDetailPage.BindingContext = masterDetailViewModel;
initTasks.Add(masterDetailViewModel.Initialise());
}
if (masterViewModel != null)
{
masterPage.BindingContext = masterViewModel;
initTasks.Add(masterViewModel.Initialise());
}
if (detailViewModel != null)
{
detailsPage.BindingContext = detailViewModel;
initTasks.Add(detailViewModel.Initialise());
}
Device.BeginInvokeOnMainThread(() =>
{
Application.Current.MainPage = masterDetailPage;
});
await CleanupPreviousMainPage();
await Task.WhenAll(initTasks);
}
private static async Task InitialisePageViewModel(YamvvmPage page, YamvvmViewModel vm)
{
if (page != null && vm != null)
{
vm.ModelPage = page;
vm.ModelReady += page.ModelReady;
#if DEBUG
var vmtype = vm.GetType().Name;
var sw = System.Diagnostics.Stopwatch.StartNew();
System.Diagnostics.Debug.WriteLine("Starting init of VM {0}", vmtype);
#endif
await vm.Initialise();
#if DEBUG
sw.Stop();
System.Diagnostics.Debug.WriteLine("Finished init of VM {0} ({1}ms)", vmtype, sw.ElapsedMilliseconds);
#endif
}
}
private static async Task Push <TPage>(PageViewModel currentViewModel, YamvvmViewModel vm, Func <INavigation, TPage, Task> pushTask) where TPage : YamvvmPage, new()
{
TPage page = new TPage();
Task initialiseViewModelTask = InitialisePage(page, vm);
INavigation navigation;
if (currentViewModel.ModelPage.Navigation == null)
{
navigation = GetNavigation();
}
else
{
//navigation = GetNavigation();
navigation = currentViewModel.ModelPage.Navigation;
}
if (navigation != null)
{
Device.BeginInvokeOnMainThread(async() => await pushTask(navigation, page));
}
await initialiseViewModelTask;
}
