public void SynchronizeAppBar()
{
IEnumerable <FormsPage> childrens = this.FindVisualChildren <FormsPage>();
CurrentTitle = childrens.FirstOrDefault()?.GetTitle();
HasNavigationBar = childrens.FirstOrDefault()?.GetHasNavigationBar() ?? false;
CurrentNavigationPage = childrens.OfType <FormsNavigationPage>()?.FirstOrDefault();
CurrentMasterDetailPage = childrens.OfType <FormsMasterDetailPage>()?.FirstOrDefault();
var page = childrens.FirstOrDefault();
if (page != null)
{
TitleBarBackgroundColor = page.GetTitleBarBackgroundColor();
TitleBarTextColor = page.GetTitleBarTextColor();
}
else
{
ClearValue(TitleBarBackgroundColorProperty);
ClearValue(TitleBarTextColorProperty);
}
hamburgerButton.Visibility = CurrentMasterDetailPage != null ? Visibility.Visible : Visibility.Collapsed;
if (CurrentNavigationPage != null)
{
HasBackButton = CurrentNavigationPage.GetHasBackButton();
BackButtonTitle = CurrentNavigationPage.GetBackButtonTitle();
}
else
{
HasBackButton = false;
BackButtonTitle = "";
}
}
private void PreviousButton_Click(object sender, RoutedEventArgs e)
{
if (CurrentNavigationPage != null && CurrentNavigationPage.StackDepth > 1)
{
CurrentNavigationPage.OnBackButtonPressed();
}
}
private async Task InternalNavigateToAsync(Type viewModelType, object parameter)
{
if (CurrentNavigationPage == null)
{
CurrentNavigationPage = Application.Current.MainPage as CustomNavigationView;
}
Page page = CreatePage(viewModelType, parameter);
if (CurrentNavigationPage != null)
{
await CurrentNavigationPage.PushAsync(page);
}
else
{
Application.Current.MainPage = new CustomNavigationView(page);
}
await(page.BindingContext as BaseViewModel).InitializeAsync(parameter);
}
public async Task GoBack()
{
var navigationStack = CurrentNavigationPage.Navigation;
if (navigationStack.NavigationStack.Count > 1)
{
await CurrentNavigationPage.PopAsync();
return;
}
if (_navigationPageStack.Count > 1)
{
_navigationPageStack.Pop();
await CurrentNavigationPage.Navigation.PopModalAsync();
return;
}
await CurrentNavigationPage.PopAsync();
}
internal async void SendHomeClicked()
{
if (UpButtonShouldNavigate())
{
if (NavAnimationInProgress)
{
return;
}
NavAnimationInProgress = true;
await CurrentNavigationPage.PopAsync();
NavAnimationInProgress = false;
}
else if (CurrentMasterDetailPage != null)
{
if (MasterDetailPageController.ShouldShowSplitMode && CurrentMasterDetailPage.IsPresented)
{
return;
}
CurrentMasterDetailPage.IsPresented = !CurrentMasterDetailPage.IsPresented;
}
}
public async Task PopAsync(bool animated)
{
var navigationStack = CurrentNavigationPage.Navigation;
if (navigationStack.NavigationStack.Count > 1)
{
if (goback)
{
goback = false;
await CurrentNavigationPage.PopAsync();
Device.StartTimer(new TimeSpan(0, 0, 2), () =>
{
goback = true;
return(false);
});
}
else
{
return;
}
}
}
public async Task <string> DisplayAlertController(string[] values = null)
{
string selectionResult = await CurrentNavigationPage.DisplayActionSheet(null, "Cancelar", null, values);
return(selectionResult);
}
public async Task GoBackAsync()
{
await CurrentNavigationPage.PopAsync();
}
