public override void Show(MvxViewModelRequest request)
{
base.Show(request);
#if DEBUG // Only showing this when debugging MVX
MvxTrace.Trace(FormsApplication.Hierarchy());
#endif
}
public override Task <bool> Show(MvxViewModelRequest request)
{
#if DEBUG // Only wrap in try-finally when in debug
try
{
#endif
return(base.Show(request));
#if DEBUG // Only showing this when debugging MVX
}
finally
{
MvxFormsLog.Instance.Trace(FormsApplication.Hierarchy());
}
#endif
}
public override Task <bool> Show(MvxViewModelRequest request)
{
#if DEBUG // Only wrap in try-finally when in debug
try
{
#endif
return(base.Show(request));
#if DEBUG // Only showing this when debugging MVX
}
catch (Exception exception)
{
Logger.Log(MvxLogLevel.Debug, () => exception.ToString());
throw;
}
finally
{
Logger.Log(MvxLogLevel.Debug, () => FormsApplication.Hierarchy());
}
#endif
}
public async override void ChangePresentation(MvxPresentationHint hint)
{
var navigation = GetPageOfType <NavigationPage>().Navigation;
if (hint is MvxPopToRootPresentationHint popToRootHint)
{
// Make sure all modals are closed
CloseAllModals(popToRootHint.Animated);
// Double check we have a navigation page, otherwise
// we can just return as we must be already at the root page
if (navigation == null)
{
return;
}
// Close all pages back to the root
await navigation.PopToRootAsync(popToRootHint.Animated);
return;
}
if (hint is MvxPopPresentationHint popHint)
{
var matched = await PopModalToViewModel(navigation, popHint);
if (matched)
{
return;
}
await PopToViewModel(navigation, popHint.ViewModelToPopTo, popHint.Animated);
return;
}
if (hint is MvxRemovePresentationHint removeHint)
{
foreach (var modal in navigation.ModalStack)
{
var removed = RemoveByViewModel(modal.Navigation, removeHint.ViewModelToRemove);
if (removed)
{
return;
}
}
RemoveByViewModel(navigation, removeHint.ViewModelToRemove);
return;
}
if (hint is MvxPagePresentationHint pageHint)
{
var pageType = ViewsContainer.GetViewType(pageHint.ViewModel);
if (GetPageOfTypeByType(pageType) is Page page)
{
if (page.Parent is TabbedPage tabbedPage)
{
tabbedPage.CurrentPage = page;
}
else if (page.Parent is CarouselPage carouselPage && page is ContentPage contentPage)
{
carouselPage.CurrentPage = contentPage;
}
}
return;
}
base.ChangePresentation(hint);
#if DEBUG // Only showing this when debugging MVX
MvxTrace.Trace(FormsApplication.Hierarchy());
#endif
}
public async override Task <bool> ChangePresentation(MvxPresentationHint hint)
{
#if DEBUG // Only wrap in try-finally when in debug
try
{
#endif
var navigation = GetPageOfType <NavigationPage>()?.Navigation;
if (hint is MvxPopToRootPresentationHint popToRootHint)
{
// Make sure all modals are closed
await CloseAllModals(popToRootHint.Animated);
// Double check we have a navigation page, otherwise
// we can just return as we must be already at the root page
if (navigation == null)
{
return(true);
}
// Close all pages back to the root
await navigation.PopToRootAsync(popToRootHint.Animated);
return(true);
}
if (hint is MvxPopPresentationHint popHint)
{
var matched = await PopModalToViewModel(navigation, popHint);
if (matched)
{
return(true);
}
await PopToViewModel(navigation, popHint.ViewModelToPopTo, popHint.Animated);
return(true);
}
if (hint is MvxRemovePresentationHint removeHint)
{
foreach (var modal in navigation.ModalStack)
{
var removed = RemoveByViewModel(modal.Navigation, removeHint.ViewModelToRemove);
if (removed)
{
return(true);
}
}
RemoveByViewModel(navigation, removeHint.ViewModelToRemove);
return(true);
}
if (hint is MvxPagePresentationHint pageHint)
{
var pageType = ViewsContainer.GetViewType(pageHint.ViewModel);
if (GetPageOfTypeByType(pageType) is Page page)
{
if (page.Parent is TabbedPage tabbedPage)
{
tabbedPage.CurrentPage = page;
}
else if (page.Parent is CarouselPage carouselPage && page is ContentPage contentPage)
{
carouselPage.CurrentPage = contentPage;
}
}
return(true);
}
if (hint is MvxPopRecursivePresentationHint popRecursiveHint)
{
var levels = popRecursiveHint.LevelsDeep;
if (levels > navigation.NavigationStack.Count())
{
levels = navigation.NavigationStack.Count();
}
for (int i = 0; i < levels; i++)
{
await navigation.PopAsync(popRecursiveHint.Animated);
}
return(true);
}
return(true);
#if DEBUG // Only showing this when debugging MVX
}
finally
{
MvxFormsLog.Instance.Trace(FormsApplication.Hierarchy());
}
#endif
}