async void setTitleImage(ParentingViewController pack, FileImageSource titleIcon)
{
var source = Internals.Registrar.Registered.GetHandler <IImageSourceHandler>(titleIcon.GetType());
var image = await source.LoadImageAsync(titleIcon);
//UIImage ctor throws on file not found if MonoTouch.ObjCRuntime.Class.ThrowOnInitFailure is true;
pack.NavigationItem.TitleView = new UIImageView(image);
}
ParentingViewController CreateViewControllerForPage(Page page)
{
if (Platform.GetRenderer(page) == null)
{
Platform.SetRenderer(page, Platform.CreateRenderer(page));
}
// must pack into container so padding can work
// otherwise the view controller is forced to 0,0
var pack = new ParentingViewController(this)
{
Child = page
};
if (!string.IsNullOrWhiteSpace(page.Title))
{
pack.NavigationItem.Title = page.Title;
}
// First page and we have a master detail to contend with
UpdateLeftBarButtonItem(pack);
//var pack = Platform.GetRenderer (view).ViewController;
var titleIcon = NavigationPage.GetTitleIcon(page);
if (!string.IsNullOrEmpty(titleIcon))
{
try
{
//UIImage ctor throws on file not found if MonoTouch.ObjCRuntime.Class.ThrowOnInitFailure is true;
pack.NavigationItem.TitleView = new UIImageView(new UIImage(titleIcon));
}
catch
{
}
}
var titleText = NavigationPage.GetBackButtonTitle(page);
if (titleText != null)
{
// adding a custom event handler to UIBarButtonItem for navigating back seems to be ignored.
pack.NavigationItem.BackBarButtonItem = new UIBarButtonItem {
Title = titleText, Style = UIBarButtonItemStyle.Plain
};
}
var pageRenderer = Platform.GetRenderer(page);
pack.View.AddSubview(pageRenderer.ViewController.View);
pack.AddChildViewController(pageRenderer.ViewController);
pageRenderer.ViewController.DidMoveToParentViewController(pack);
return(pack);
}
void UpdateLeftBarButtonItem(ParentingViewController containerController, Page pageBeingRemoved = null)
{
if (containerController == null)
{
return;
}
var currentChild = containerController.Child;
var firstPage = ((NavigationPage)Element).Pages.FirstOrDefault();
if ((firstPage != pageBeingRemoved && currentChild != firstPage && NavigationPage.GetHasBackButton(currentChild)) || _parentMasterDetailPage == null)
{
return;
}
SetMasterLeftBarButton(containerController, _parentMasterDetailPage);
}
ParentingViewController CreateViewControllerForPage(Page page)
{
if (Platform.GetRenderer(page) == null)
Platform.SetRenderer(page, Platform.CreateRenderer(page));
// must pack into container so padding can work
// otherwise the view controller is forced to 0,0
var pack = new ParentingViewController(this) { Child = page };
pack.UpdateTitleArea(page);
var pageRenderer = Platform.GetRenderer(page);
pack.View.AddSubview(pageRenderer.ViewController.View);
pack.AddChildViewController(pageRenderer.ViewController);
pageRenderer.ViewController.DidMoveToParentViewController(pack);
return pack;
}
void UpdateLeftBarButtonItem(ParentingViewController containerController, Page pageBeingRemoved = null)
{
if (containerController == null)
{
return;
}
var currentChild = containerController.Child;
var firstPage = ((INavigationPageController)Element).Pages.FirstOrDefault();
if ((firstPage != pageBeingRemoved && currentChild != firstPage && NavigationPage.GetHasBackButton(currentChild)) || _parentMasterDetailPage == null)
{
return;
}
if (!_parentMasterDetailPage.ShouldShowToolbarButton())
{
containerController.NavigationItem.LeftBarButtonItem = null;
return;
}
var shouldUseIcon = _parentMasterDetailPage.Master.Icon != null;
if (shouldUseIcon)
{
try
{
containerController.NavigationItem.LeftBarButtonItem =
new UIBarButtonItem(new UIImage(_parentMasterDetailPage.Master.Icon), UIBarButtonItemStyle.Plain,
(o, e) => _parentMasterDetailPage.IsPresented = !_parentMasterDetailPage.IsPresented);
}
catch (Exception)
{
// Throws Exception otherwise would catch more specific exception type
shouldUseIcon = false;
}
}
if (!shouldUseIcon)
{
containerController.NavigationItem.LeftBarButtonItem = new UIBarButtonItem(_parentMasterDetailPage.Master.Title,
UIBarButtonItemStyle.Plain,
(o, e) => _parentMasterDetailPage.IsPresented = !_parentMasterDetailPage.IsPresented);
}
}
void UpdateLeftBarButtonItem(ParentingViewController containerController, Page pageBeingRemoved = null)
{
if (containerController == null)
return;
var currentChild = containerController.Child;
var firstPage = ((INavigationPageController)Element).StackCopy.LastOrDefault();
if ((firstPage != pageBeingRemoved && currentChild != firstPage && NavigationPage.GetHasBackButton(currentChild)) || _parentMasterDetailPage == null)
return;
if (!_parentMasterDetailPage.ShouldShowToolbarButton())
{
containerController.NavigationItem.LeftBarButtonItem = null;
return;
}
var shouldUseIcon = _parentMasterDetailPage.Master.Icon != null;
if (shouldUseIcon)
{
try
{
containerController.NavigationItem.LeftBarButtonItem =
new UIBarButtonItem(new UIImage(_parentMasterDetailPage.Master.Icon), UIBarButtonItemStyle.Plain,
(o, e) => _parentMasterDetailPage.IsPresented = !_parentMasterDetailPage.IsPresented);
}
catch (Exception)
{
// Throws Exception otherwise would catch more specific exception type
shouldUseIcon = false;
}
}
if (!shouldUseIcon)
{
containerController.NavigationItem.LeftBarButtonItem = new UIBarButtonItem(_parentMasterDetailPage.Master.Title,
UIBarButtonItemStyle.Plain,
(o, e) => _parentMasterDetailPage.IsPresented = !_parentMasterDetailPage.IsPresented);
}
}
ParentingViewController CreateViewControllerForPage(Page page)
{
if (Platform.GetRenderer(page) == null)
Platform.SetRenderer(page, Platform.CreateRenderer(page));
// must pack into container so padding can work
// otherwise the view controller is forced to 0,0
var pack = new ParentingViewController(this) { Child = page };
if (!string.IsNullOrWhiteSpace(page.Title))
pack.NavigationItem.Title = page.Title;
// First page and we have a master detail to contend with
UpdateLeftBarButtonItem(pack);
//var pack = Platform.GetRenderer (view).ViewController;
var titleIcon = NavigationPage.GetTitleIcon(page);
if (!string.IsNullOrEmpty(titleIcon))
{
try
{
//UIImage ctor throws on file not found if MonoTouch.ObjCRuntime.Class.ThrowOnInitFailure is true;
pack.NavigationItem.TitleView = new UIImageView(new UIImage(titleIcon));
}
catch
{
}
}
var titleText = NavigationPage.GetBackButtonTitle(page);
if (titleText != null)
{
pack.NavigationItem.BackBarButtonItem =
new UIBarButtonItem(titleText, UIBarButtonItemStyle.Plain, async (o, e) => await PopViewAsync(page));
}
var pageRenderer = Platform.GetRenderer(page);
pack.View.AddSubview(pageRenderer.ViewController.View);
pack.AddChildViewController(pageRenderer.ViewController);
pageRenderer.ViewController.DidMoveToParentViewController(pack);
return pack;
}