1327 строки
39 KiB
C#
1327 строки
39 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Linq;
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using System.Threading.Tasks;
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using Android.App;
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using Android.Content;
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using Android.Content.Res;
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using Android.Graphics;
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using Android.Graphics.Drawables;
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using Android.OS;
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using Android.Support.V4.App;
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using Android.Util;
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using Android.Views;
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using Android.Widget;
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using Xamarin.Forms.Platform.Android.AppCompat;
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using FragmentManager = Android.Support.V4.App.FragmentManager;
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using Xamarin.Forms.Internals;
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using AView = Android.Views.View;
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namespace Xamarin.Forms.Platform.Android
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{
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public class Platform : BindableObject, IPlatform, INavigation, IDisposable, IPlatformLayout
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{
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internal const string CloseContextActionsSignalName = "Xamarin.CloseContextActions";
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internal static readonly BindableProperty RendererProperty = BindableProperty.CreateAttached("Renderer", typeof(IVisualElementRenderer), typeof(Platform), default(IVisualElementRenderer),
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propertyChanged: (bindable, oldvalue, newvalue) =>
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{
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var view = bindable as VisualElement;
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if (view != null)
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view.IsPlatformEnabled = newvalue != null;
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});
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IMasterDetailPageController MasterDetailPageController => CurrentMasterDetailPage as IMasterDetailPageController;
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readonly Context _context;
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readonly Activity _activity;
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readonly PlatformRenderer _renderer;
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readonly ToolbarTracker _toolbarTracker = new ToolbarTracker();
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NavigationPage _currentNavigationPage;
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TabbedPage _currentTabbedPage;
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Color _defaultActionBarTitleTextColor;
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bool _disposed;
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bool _ignoreAndroidSelection;
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Page _navigationPageCurrentPage;
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NavigationModel _navModel = new NavigationModel();
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readonly bool _embedded;
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internal Platform(Context context, bool embedded)
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{
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_embedded = embedded;
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_context = context ?? throw new ArgumentNullException(nameof(context), "Somehow we're getting a null context passed in");
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_activity = context as Activity;
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if (!embedded)
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{
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_defaultActionBarTitleTextColor = SetDefaultActionBarTitleTextColor();
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}
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_renderer = new PlatformRenderer(context, this);
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if (embedded)
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{
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// Set up handling of DisplayAlert/DisplayActionSheet/UpdateProgressBarVisibility
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if (_activity == null)
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{
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// Can't show dialogs if it's not an activity
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return;
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}
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PopupManager.Subscribe(_activity);
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return;
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}
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FormsApplicationActivity.BackPressed += HandleBackPressed;
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_toolbarTracker.CollectionChanged += ToolbarTrackerOnCollectionChanged;
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}
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#region IPlatform implementation
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internal Page Page { get; private set; }
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#endregion
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IPageController CurrentPageController => _navModel.CurrentPage as IPageController;
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ActionBar ActionBar => _activity?.ActionBar;
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MasterDetailPage CurrentMasterDetailPage { get; set; }
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NavigationPage CurrentNavigationPage
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{
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get { return _currentNavigationPage; }
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set
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{
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if (_currentNavigationPage == value)
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return;
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if (_currentNavigationPage != null)
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{
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_currentNavigationPage.Pushed -= CurrentNavigationPageOnPushed;
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_currentNavigationPage.Popped -= CurrentNavigationPageOnPopped;
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_currentNavigationPage.PoppedToRoot -= CurrentNavigationPageOnPoppedToRoot;
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_currentNavigationPage.PropertyChanged -= CurrentNavigationPageOnPropertyChanged;
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}
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RegisterNavPageCurrent(null);
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_currentNavigationPage = value;
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if (_currentNavigationPage != null)
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{
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_currentNavigationPage.Pushed += CurrentNavigationPageOnPushed;
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_currentNavigationPage.Popped += CurrentNavigationPageOnPopped;
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_currentNavigationPage.PoppedToRoot += CurrentNavigationPageOnPoppedToRoot;
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_currentNavigationPage.PropertyChanged += CurrentNavigationPageOnPropertyChanged;
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RegisterNavPageCurrent(_currentNavigationPage.CurrentPage);
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}
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}
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}
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TabbedPage CurrentTabbedPage
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{
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get { return _currentTabbedPage; }
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set
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{
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if (_currentTabbedPage == value)
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return;
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if (_currentTabbedPage != null)
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{
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_currentTabbedPage.PagesChanged -= CurrentTabbedPageChildrenChanged;
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_currentTabbedPage.PropertyChanged -= CurrentTabbedPageOnPropertyChanged;
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if (value == null)
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ActionBar.RemoveAllTabs();
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}
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_currentTabbedPage = value;
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if (_currentTabbedPage != null)
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{
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_currentTabbedPage.PagesChanged += CurrentTabbedPageChildrenChanged;
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_currentTabbedPage.PropertyChanged += CurrentTabbedPageOnPropertyChanged;
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}
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UpdateActionBarTitle();
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ActionBar.NavigationMode = value == null ? ActionBarNavigationMode.Standard : ActionBarNavigationMode.Tabs;
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CurrentTabbedPageChildrenChanged(null, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
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}
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}
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#pragma warning disable 618 // Eventually we will need to determine how to handle the v7 ActionBarDrawerToggle for AppCompat
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ActionBarDrawerToggle MasterDetailPageToggle { get; set; }
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#pragma warning restore 618
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void IDisposable.Dispose()
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{
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if (_disposed)
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return;
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_disposed = true;
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SetPage(null);
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if (_embedded)
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{
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PopupManager.Unsubscribe(_context);
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}
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FormsApplicationActivity.BackPressed -= HandleBackPressed;
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_toolbarTracker.CollectionChanged -= ToolbarTrackerOnCollectionChanged;
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_toolbarTracker.Target = null;
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CurrentNavigationPage = null;
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CurrentMasterDetailPage = null;
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CurrentTabbedPage = null;
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}
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void INavigation.InsertPageBefore(Page page, Page before)
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{
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throw new InvalidOperationException("InsertPageBefore is not supported globally on Android, please use a NavigationPage.");
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}
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IReadOnlyList<Page> INavigation.ModalStack => _navModel.Modals.ToList();
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IReadOnlyList<Page> INavigation.NavigationStack => new List<Page>();
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Task<Page> INavigation.PopAsync()
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{
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return ((INavigation)this).PopAsync(true);
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}
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Task<Page> INavigation.PopAsync(bool animated)
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{
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throw new InvalidOperationException("PopAsync is not supported globally on Android, please use a NavigationPage.");
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}
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Task<Page> INavigation.PopModalAsync()
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{
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return ((INavigation)this).PopModalAsync(true);
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}
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Task<Page> INavigation.PopModalAsync(bool animated)
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{
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Page modal = _navModel.PopModal();
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((IPageController)modal).SendDisappearing();
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var source = new TaskCompletionSource<Page>();
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IVisualElementRenderer modalRenderer = GetRenderer(modal);
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if (modalRenderer != null)
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{
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if (animated)
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{
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modalRenderer.View.Animate().Alpha(0).ScaleX(0.8f).ScaleY(0.8f).SetDuration(250).SetListener(new GenericAnimatorListener
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{
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OnEnd = a =>
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{
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modalRenderer.View.RemoveFromParent();
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modalRenderer.Dispose();
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source.TrySetResult(modal);
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CurrentPageController?.SendAppearing();
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}
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});
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}
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else
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{
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modalRenderer.View.RemoveFromParent();
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modalRenderer.Dispose();
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source.TrySetResult(modal);
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CurrentPageController?.SendAppearing();
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}
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}
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_toolbarTracker.Target = _navModel.Roots.Last();
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UpdateActionBar();
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return source.Task;
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}
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Task INavigation.PopToRootAsync()
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{
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return ((INavigation)this).PopToRootAsync(true);
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}
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Task INavigation.PopToRootAsync(bool animated)
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{
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throw new InvalidOperationException("PopToRootAsync is not supported globally on Android, please use a NavigationPage.");
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}
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Task INavigation.PushAsync(Page root)
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{
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return ((INavigation)this).PushAsync(root, true);
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}
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Task INavigation.PushAsync(Page root, bool animated)
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{
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throw new InvalidOperationException("PushAsync is not supported globally on Android, please use a NavigationPage.");
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}
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Task INavigation.PushModalAsync(Page modal)
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{
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return ((INavigation)this).PushModalAsync(modal, true);
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}
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async Task INavigation.PushModalAsync(Page modal, bool animated)
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{
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CurrentPageController?.SendDisappearing();
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_navModel.PushModal(modal);
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modal.Platform = this;
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await PresentModal(modal, animated);
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// Verify that the modal is still on the stack
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if (_navModel.CurrentPage == modal)
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((IPageController)modal).SendAppearing();
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_toolbarTracker.Target = _navModel.Roots.Last();
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UpdateActionBar();
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}
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void INavigation.RemovePage(Page page)
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{
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throw new InvalidOperationException("RemovePage is not supported globally on Android, please use a NavigationPage.");
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}
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public static void ClearRenderer(AView renderedView)
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{
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var element = (renderedView as IVisualElementRenderer)?.Element;
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var view = element as View;
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if (view != null)
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{
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var renderer = GetRenderer(view);
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if (renderer == renderedView)
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element.ClearValue(RendererProperty);
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renderer?.Dispose();
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renderer = null;
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}
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var layout = view as IVisualElementRenderer;
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layout?.Dispose();
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layout = null;
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}
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[Obsolete("CreateRenderer(VisualElement) is obsolete as of version 2.5. Please use CreateRendererWithContext(VisualElement, Context) instead.")]
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public static IVisualElementRenderer CreateRenderer(VisualElement element)
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{
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// If there's a previewer context set, use that when created
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return CreateRenderer(element, GetPreviewerContext(element) ?? Forms.Context);
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}
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internal static IVisualElementRenderer CreateRenderer(VisualElement element, Context context)
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{
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IVisualElementRenderer renderer = Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element, context)
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?? new DefaultRenderer(context);
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renderer.SetElement(element);
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return renderer;
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}
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public static IVisualElementRenderer CreateRendererWithContext(VisualElement element, Context context)
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{
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// This is an interim method to allow public access to CreateRenderer(element, context), which we
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// can't make public yet because it will break the previewer
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return CreateRenderer(element, context);
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}
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public static IVisualElementRenderer GetRenderer(VisualElement bindable)
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{
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return (IVisualElementRenderer)bindable?.GetValue(RendererProperty);
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}
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public static void SetRenderer(VisualElement bindable, IVisualElementRenderer value)
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{
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bindable.SetValue(RendererProperty, value);
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}
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public void UpdateActionBarTextColor()
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{
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if (_embedded)
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{
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return;
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}
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SetActionBarTextColor();
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UpdateActionBarUpImageColor();
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}
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protected override void OnBindingContextChanged()
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{
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SetInheritedBindingContext(Page, BindingContext);
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base.OnBindingContextChanged();
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}
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internal static IVisualElementRenderer CreateRenderer(VisualElement element, FragmentManager fragmentManager, Context context)
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{
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IVisualElementRenderer renderer = Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element, context) ?? new DefaultRenderer(context);
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var managesFragments = renderer as IManageFragments;
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managesFragments?.SetFragmentManager(fragmentManager);
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renderer.SetElement(element);
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return renderer;
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}
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internal ViewGroup GetViewGroup()
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{
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return _renderer;
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}
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internal void PrepareMenu(IMenu menu)
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{
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if (_embedded)
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{
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return;
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}
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foreach (ToolbarItem item in _toolbarTracker.ToolbarItems)
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item.PropertyChanged -= HandleToolbarItemPropertyChanged;
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menu.Clear();
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if (!ShouldShowActionBarTitleArea())
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return;
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foreach (ToolbarItem item in _toolbarTracker.ToolbarItems)
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{
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IMenuItemController controller = item;
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item.PropertyChanged += HandleToolbarItemPropertyChanged;
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if (item.Order == ToolbarItemOrder.Secondary)
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{
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IMenuItem menuItem = menu.Add(item.Text);
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menuItem.SetEnabled(controller.IsEnabled);
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menuItem.SetOnMenuItemClickListener(new GenericMenuClickListener(controller.Activate));
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}
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else
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{
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IMenuItem menuItem = menu.Add(item.Text);
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var icon = item.Icon;
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if (!string.IsNullOrEmpty(icon))
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{
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Drawable iconDrawable = _context.GetFormsDrawable(icon);
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if (iconDrawable != null)
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menuItem.SetIcon(iconDrawable);
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}
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menuItem.SetEnabled(controller.IsEnabled);
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menuItem.SetShowAsAction(ShowAsAction.Always);
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menuItem.SetOnMenuItemClickListener(new GenericMenuClickListener(controller.Activate));
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}
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}
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}
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internal async void SendHomeClicked()
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{
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if (UpButtonShouldNavigate())
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{
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if (NavAnimationInProgress)
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return;
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NavAnimationInProgress = true;
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await CurrentNavigationPage.PopAsync();
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NavAnimationInProgress = false;
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}
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else if (CurrentMasterDetailPage != null)
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{
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if (MasterDetailPageController.ShouldShowSplitMode && CurrentMasterDetailPage.IsPresented)
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return;
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CurrentMasterDetailPage.IsPresented = !CurrentMasterDetailPage.IsPresented;
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}
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}
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internal void SetPage(Page newRoot)
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{
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var layout = false;
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List<IVisualElementRenderer> toDispose = null;
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if (Page != null)
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{
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_renderer.RemoveAllViews();
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toDispose = _navModel.Roots.Select(Android.Platform.GetRenderer).ToList();
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_navModel = new NavigationModel();
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layout = true;
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}
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if (newRoot == null)
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return;
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_navModel.Push(newRoot, null);
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Page = newRoot;
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Page.Platform = this;
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AddChild(Page, layout);
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Application.Current.NavigationProxy.Inner = this;
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_toolbarTracker.Target = newRoot;
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UpdateActionBar();
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if (toDispose?.Count > 0)
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{
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// Queue up disposal of the previous renderers after the current layout updates have finished
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new Handler(Looper.MainLooper).Post(() =>
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{
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foreach (IVisualElementRenderer rootRenderer in toDispose)
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{
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rootRenderer.Dispose();
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}
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});
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}
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}
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internal void UpdateActionBar()
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{
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if (ActionBar == null || _embedded) //Fullscreen theme doesn't have action bar
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return;
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List<Page> relevantAncestors = AncestorPagesOfPage(_navModel.CurrentPage);
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IEnumerable<NavigationPage> navPages = relevantAncestors.OfType<NavigationPage>();
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if (navPages.Count() > 1)
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throw new Exception("Android only allows one navigation page on screen at a time");
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NavigationPage navPage = navPages.FirstOrDefault();
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IEnumerable<TabbedPage> tabbedPages = relevantAncestors.OfType<TabbedPage>();
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if (tabbedPages.Count() > 1)
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throw new Exception("Android only allows one tabbed page on screen at a time");
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TabbedPage tabbedPage = tabbedPages.FirstOrDefault();
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CurrentMasterDetailPage = relevantAncestors.OfType<MasterDetailPage>().FirstOrDefault();
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CurrentNavigationPage = navPage;
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CurrentTabbedPage = tabbedPage;
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if (navPage != null && navPage.CurrentPage == null)
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{
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throw new InvalidOperationException("NavigationPage must have a root Page before being used. Either call PushAsync with a valid Page, or pass a Page to the constructor before usage.");
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}
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if (ShouldShowActionBarTitleArea() || CurrentTabbedPage != null)
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ShowActionBar();
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else
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HideActionBar();
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UpdateMasterDetailToggle();
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}
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internal void UpdateActionBarBackgroundColor()
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{
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if (ActionBar == null)
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{
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return;
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}
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if (!ShouldShowActionBarTitleArea())
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return;
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Color colorToUse = Color.Default;
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if (CurrentNavigationPage != null)
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{
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#pragma warning disable 618 // Make sure Tint still works
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if (CurrentNavigationPage.Tint != Color.Default)
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colorToUse = CurrentNavigationPage.Tint;
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#pragma warning restore 618
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else if (CurrentNavigationPage.BarBackgroundColor != Color.Default)
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colorToUse = CurrentNavigationPage.BarBackgroundColor;
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}
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using (Drawable drawable = colorToUse == Color.Default ? GetActionBarBackgroundDrawable() : new ColorDrawable(colorToUse.ToAndroid()))
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ActionBar.SetBackgroundDrawable(drawable);
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}
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internal void UpdateMasterDetailToggle(bool update = false)
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{
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if (CurrentMasterDetailPage == null)
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{
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if (MasterDetailPageToggle == null)
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return;
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// clear out the icon
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ClearMasterDetailToggle();
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return;
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}
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if (!CurrentMasterDetailPage.ShouldShowToolbarButton() || string.IsNullOrEmpty(CurrentMasterDetailPage.Master.Icon) ||
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(MasterDetailPageController.ShouldShowSplitMode && CurrentMasterDetailPage.IsPresented))
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{
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//clear out existing icon;
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ClearMasterDetailToggle();
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return;
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}
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if (MasterDetailPageToggle == null || update)
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{
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ClearMasterDetailToggle();
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GetNewMasterDetailToggle();
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}
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bool state;
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if (CurrentNavigationPage == null)
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state = true;
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else
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state = !UpButtonShouldNavigate();
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if (state == MasterDetailPageToggle.DrawerIndicatorEnabled)
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return;
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MasterDetailPageToggle.DrawerIndicatorEnabled = state;
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MasterDetailPageToggle.SyncState();
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}
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void AddChild(VisualElement view, bool layout = false)
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{
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if (GetRenderer(view) != null)
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return;
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|
|
IVisualElementRenderer renderView = CreateRenderer(view, _context);
|
|
SetRenderer(view, renderView);
|
|
|
|
if (layout)
|
|
view.Layout(new Rectangle(0, 0, _context.FromPixels(_renderer.Width), _context.FromPixels(_renderer.Height)));
|
|
|
|
_renderer.AddView(renderView.View);
|
|
}
|
|
|
|
#pragma warning disable 618 // This may need to be updated to work with TabLayout/AppCompat
|
|
ActionBar.Tab AddTab(Page page, int index)
|
|
#pragma warning restore 618
|
|
{
|
|
ActionBar actionBar = ActionBar;
|
|
|
|
if (actionBar == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
TabbedPage currentTabs = CurrentTabbedPage;
|
|
|
|
var atab = actionBar.NewTab();
|
|
atab.SetText(page.Title);
|
|
atab.TabSelected += (sender, e) =>
|
|
{
|
|
if (!_ignoreAndroidSelection)
|
|
currentTabs.CurrentPage = page;
|
|
};
|
|
actionBar.AddTab(atab, index);
|
|
|
|
page.PropertyChanged += PagePropertyChanged;
|
|
return atab;
|
|
}
|
|
|
|
List<Page> AncestorPagesOfPage(Page root)
|
|
{
|
|
var result = new List<Page>();
|
|
if (root == null)
|
|
return result;
|
|
|
|
if (root is IPageContainer<Page>)
|
|
{
|
|
var navPage = (IPageContainer<Page>)root;
|
|
result.AddRange(AncestorPagesOfPage(navPage.CurrentPage));
|
|
}
|
|
else if (root is MasterDetailPage)
|
|
result.AddRange(AncestorPagesOfPage(((MasterDetailPage)root).Detail));
|
|
else
|
|
{
|
|
foreach (Page page in ((IPageController)root).InternalChildren.OfType<Page>())
|
|
result.AddRange(AncestorPagesOfPage(page));
|
|
}
|
|
|
|
result.Add(root);
|
|
return result;
|
|
}
|
|
|
|
void ClearMasterDetailToggle()
|
|
{
|
|
if (MasterDetailPageToggle == null)
|
|
return;
|
|
|
|
MasterDetailPageToggle.DrawerIndicatorEnabled = false;
|
|
MasterDetailPageToggle.SyncState();
|
|
MasterDetailPageToggle.Dispose();
|
|
MasterDetailPageToggle = null;
|
|
}
|
|
|
|
void CurrentNavigationPageOnPopped(object sender, NavigationEventArgs eventArg)
|
|
{
|
|
UpdateActionBar();
|
|
}
|
|
|
|
void CurrentNavigationPageOnPoppedToRoot(object sender, EventArgs eventArgs)
|
|
{
|
|
UpdateActionBar();
|
|
}
|
|
|
|
void CurrentNavigationPageOnPropertyChanged(object sender, PropertyChangedEventArgs e)
|
|
{
|
|
#pragma warning disable 618 // Make sure Tint still works
|
|
if (e.PropertyName == NavigationPage.TintProperty.PropertyName)
|
|
#pragma warning restore 618
|
|
UpdateActionBarBackgroundColor();
|
|
else if (e.PropertyName == NavigationPage.BarBackgroundColorProperty.PropertyName)
|
|
UpdateActionBarBackgroundColor();
|
|
else if (e.PropertyName == NavigationPage.BarTextColorProperty.PropertyName)
|
|
UpdateActionBarTextColor();
|
|
else if (e.PropertyName == NavigationPage.CurrentPageProperty.PropertyName)
|
|
RegisterNavPageCurrent(CurrentNavigationPage.CurrentPage);
|
|
}
|
|
|
|
void CurrentNavigationPageOnPushed(object sender, NavigationEventArgs eventArg)
|
|
{
|
|
UpdateActionBar();
|
|
}
|
|
|
|
void CurrentTabbedPageChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
|
|
{
|
|
if (CurrentTabbedPage == null)
|
|
return;
|
|
|
|
_ignoreAndroidSelection = true;
|
|
|
|
e.Apply((o, index, create) => AddTab((Page)o, index), (o, index) => RemoveTab((Page)o, index), Reset);
|
|
|
|
if (CurrentTabbedPage.CurrentPage != null)
|
|
{
|
|
Page page = CurrentTabbedPage.CurrentPage;
|
|
int index = TabbedPage.GetIndex(page);
|
|
if (index >= 0 && index < CurrentTabbedPage.Children.Count)
|
|
ActionBar.GetTabAt(index).Select();
|
|
}
|
|
|
|
_ignoreAndroidSelection = false;
|
|
}
|
|
|
|
void CurrentTabbedPageOnPropertyChanged(object sender, PropertyChangedEventArgs e)
|
|
{
|
|
if (e.PropertyName != "CurrentPage")
|
|
return;
|
|
|
|
UpdateActionBar();
|
|
|
|
// If we switch tabs while pushing a new page, UpdateActionBar() can set currentTabbedPage to null
|
|
if (_currentTabbedPage == null)
|
|
return;
|
|
|
|
NavAnimationInProgress = true;
|
|
|
|
Page page = _currentTabbedPage.CurrentPage;
|
|
if (page == null)
|
|
{
|
|
ActionBar.SelectTab(null);
|
|
NavAnimationInProgress = false;
|
|
return;
|
|
}
|
|
|
|
int index = TabbedPage.GetIndex(page);
|
|
if (ActionBar.SelectedNavigationIndex == index || index >= ActionBar.NavigationItemCount)
|
|
{
|
|
NavAnimationInProgress = false;
|
|
return;
|
|
}
|
|
|
|
ActionBar.SelectTab(ActionBar.GetTabAt(index));
|
|
|
|
NavAnimationInProgress = false;
|
|
}
|
|
|
|
Drawable GetActionBarBackgroundDrawable()
|
|
{
|
|
int[] backgroundDataArray = { global::Android.Resource.Attribute.Background };
|
|
|
|
using (var outVal = new TypedValue())
|
|
{
|
|
_context.Theme.ResolveAttribute(global::Android.Resource.Attribute.ActionBarStyle, outVal, true);
|
|
TypedArray actionBarStyle = _context.Theme.ObtainStyledAttributes(outVal.ResourceId, backgroundDataArray);
|
|
|
|
Drawable result = actionBarStyle.GetDrawable(0);
|
|
actionBarStyle.Recycle();
|
|
return result;
|
|
}
|
|
}
|
|
|
|
void GetNewMasterDetailToggle()
|
|
{
|
|
int icon = ResourceManager.GetDrawableByName(CurrentMasterDetailPage.Master.Icon);
|
|
var drawer = GetRenderer(CurrentMasterDetailPage) as MasterDetailRenderer;
|
|
if (drawer == null)
|
|
return;
|
|
|
|
if (_activity == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#pragma warning disable 618 // Eventually we will need to determine how to handle the v7 ActionBarDrawerToggle for AppCompat
|
|
MasterDetailPageToggle = new ActionBarDrawerToggle(_activity, drawer, icon, 0, 0);
|
|
#pragma warning restore 618
|
|
|
|
MasterDetailPageToggle.SyncState();
|
|
}
|
|
|
|
bool HandleBackPressed(object sender, EventArgs e)
|
|
{
|
|
if (NavAnimationInProgress)
|
|
return true;
|
|
|
|
Page root = _navModel.Roots.Last();
|
|
bool handled = root.SendBackButtonPressed();
|
|
|
|
return handled;
|
|
}
|
|
|
|
void HandleToolbarItemPropertyChanged(object sender, PropertyChangedEventArgs e)
|
|
{
|
|
if (_activity == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (e.PropertyName == MenuItem.IsEnabledProperty.PropertyName)
|
|
_activity.InvalidateOptionsMenu();
|
|
else if (e.PropertyName == MenuItem.TextProperty.PropertyName)
|
|
_activity.InvalidateOptionsMenu();
|
|
else if (e.PropertyName == MenuItem.IconProperty.PropertyName)
|
|
_activity.InvalidateOptionsMenu();
|
|
}
|
|
|
|
void HideActionBar()
|
|
{
|
|
ReloadToolbarItems();
|
|
UpdateActionBarHomeAsUp(ActionBar);
|
|
ActionBar.Hide();
|
|
}
|
|
|
|
void NavigationPageCurrentPageOnPropertyChanged(object sender, PropertyChangedEventArgs e)
|
|
{
|
|
if (e.PropertyName == NavigationPage.HasNavigationBarProperty.PropertyName)
|
|
UpdateActionBar();
|
|
else if (e.PropertyName == Page.TitleProperty.PropertyName)
|
|
UpdateActionBarTitle();
|
|
}
|
|
|
|
void PagePropertyChanged(object sender, PropertyChangedEventArgs args)
|
|
{
|
|
if (args.PropertyName == Page.TitleProperty.PropertyName)
|
|
{
|
|
ActionBar actionBar = ActionBar;
|
|
TabbedPage currentTabs = CurrentTabbedPage;
|
|
|
|
if (actionBar == null || currentTabs == null || actionBar.TabCount == 0)
|
|
return;
|
|
|
|
var page = sender as Page;
|
|
var atab = actionBar.GetTabAt(currentTabs.Children.IndexOf(page));
|
|
atab.SetText(page.Title);
|
|
}
|
|
}
|
|
|
|
Task PresentModal(Page modal, bool animated)
|
|
{
|
|
IVisualElementRenderer modalRenderer = GetRenderer(modal);
|
|
if (modalRenderer == null)
|
|
{
|
|
modalRenderer = CreateRenderer(modal, _context);
|
|
SetRenderer(modal, modalRenderer);
|
|
|
|
if (modal.BackgroundColor == Color.Default && modal.BackgroundImage == null)
|
|
modalRenderer.View.SetWindowBackground();
|
|
}
|
|
modalRenderer.Element.Layout(new Rectangle(0, 0, _context.FromPixels(_renderer.Width), _context.FromPixels(_renderer.Height)));
|
|
_renderer.AddView(modalRenderer.View);
|
|
|
|
var source = new TaskCompletionSource<bool>();
|
|
NavAnimationInProgress = true;
|
|
if (animated)
|
|
{
|
|
modalRenderer.View.Alpha = 0;
|
|
modalRenderer.View.ScaleX = 0.8f;
|
|
modalRenderer.View.ScaleY = 0.8f;
|
|
modalRenderer.View.Animate().Alpha(1).ScaleX(1).ScaleY(1).SetDuration(250).SetListener(new GenericAnimatorListener
|
|
{
|
|
OnEnd = a =>
|
|
{
|
|
source.TrySetResult(false);
|
|
NavAnimationInProgress = false;
|
|
},
|
|
OnCancel = a =>
|
|
{
|
|
source.TrySetResult(true);
|
|
NavAnimationInProgress = false;
|
|
}
|
|
});
|
|
}
|
|
else
|
|
{
|
|
NavAnimationInProgress = false;
|
|
source.TrySetResult(true);
|
|
}
|
|
|
|
return source.Task;
|
|
}
|
|
|
|
void RegisterNavPageCurrent(Page page)
|
|
{
|
|
if (_navigationPageCurrentPage != null)
|
|
_navigationPageCurrentPage.PropertyChanged -= NavigationPageCurrentPageOnPropertyChanged;
|
|
|
|
_navigationPageCurrentPage = page;
|
|
|
|
if (_navigationPageCurrentPage != null)
|
|
_navigationPageCurrentPage.PropertyChanged += NavigationPageCurrentPageOnPropertyChanged;
|
|
}
|
|
|
|
void ReloadToolbarItems()
|
|
{
|
|
_activity?.InvalidateOptionsMenu();
|
|
}
|
|
|
|
void RemoveTab(Page page, int index)
|
|
{
|
|
page.PropertyChanged -= PagePropertyChanged;
|
|
ActionBar?.RemoveTabAt(index);
|
|
}
|
|
|
|
void Reset()
|
|
{
|
|
ActionBar.RemoveAllTabs();
|
|
|
|
if (CurrentTabbedPage == null)
|
|
return;
|
|
|
|
var i = 0;
|
|
foreach (Page tab in CurrentTabbedPage.Children.OfType<Page>())
|
|
{
|
|
var realTab = AddTab(tab, i++);
|
|
if (tab == CurrentTabbedPage.CurrentPage)
|
|
realTab.Select();
|
|
}
|
|
}
|
|
|
|
void SetActionBarTextColor()
|
|
{
|
|
Color navigationBarTextColor = CurrentNavigationPage == null ? Color.Default : CurrentNavigationPage.BarTextColor;
|
|
TextView actionBarTitleTextView = null;
|
|
|
|
if (Forms.IsLollipopOrNewer && _activity != null)
|
|
{
|
|
int actionbarId = _activity.Resources.GetIdentifier("action_bar", "id", "android");
|
|
if (actionbarId > 0)
|
|
{
|
|
var toolbar = _activity.FindViewById(actionbarId) as ViewGroup;
|
|
if (toolbar != null)
|
|
{
|
|
for (int i = 0; i < toolbar.ChildCount; i++)
|
|
{
|
|
var textView = toolbar.GetChildAt(i) as TextView;
|
|
if (textView != null)
|
|
{
|
|
actionBarTitleTextView = textView;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (actionBarTitleTextView == null && _activity != null)
|
|
{
|
|
int actionBarTitleId = _activity.Resources.GetIdentifier("action_bar_title", "id", "android");
|
|
if (actionBarTitleId > 0)
|
|
actionBarTitleTextView = _activity.FindViewById<TextView>(actionBarTitleId);
|
|
}
|
|
|
|
if (actionBarTitleTextView != null && navigationBarTextColor != Color.Default)
|
|
actionBarTitleTextView.SetTextColor(navigationBarTextColor.ToAndroid());
|
|
else if (actionBarTitleTextView != null && navigationBarTextColor == Color.Default)
|
|
actionBarTitleTextView.SetTextColor(_defaultActionBarTitleTextColor.ToAndroid());
|
|
}
|
|
|
|
Color SetDefaultActionBarTitleTextColor()
|
|
{
|
|
var defaultTitleTextColor = new Color();
|
|
|
|
if (_activity == null)
|
|
{
|
|
return defaultTitleTextColor;
|
|
}
|
|
|
|
TextView actionBarTitleTextView = null;
|
|
|
|
int actionBarTitleId = _activity.Resources.GetIdentifier("action_bar_title", "id", "android");
|
|
if (actionBarTitleId > 0)
|
|
actionBarTitleTextView = _activity.FindViewById<TextView>(actionBarTitleId);
|
|
|
|
if (actionBarTitleTextView != null)
|
|
{
|
|
ColorStateList defaultTitleColorList = actionBarTitleTextView.TextColors;
|
|
string defaultColorHex = defaultTitleColorList.DefaultColor.ToString("X");
|
|
defaultTitleTextColor = Color.FromHex(defaultColorHex);
|
|
}
|
|
|
|
return defaultTitleTextColor;
|
|
}
|
|
|
|
bool ShouldShowActionBarTitleArea()
|
|
{
|
|
if (_activity == null)
|
|
return false;
|
|
|
|
if (_activity.Window.Attributes.Flags.HasFlag(WindowManagerFlags.Fullscreen))
|
|
return false;
|
|
|
|
bool hasMasterDetailPage = CurrentMasterDetailPage != null;
|
|
bool navigated = CurrentNavigationPage != null && ((INavigationPageController)CurrentNavigationPage).StackDepth > 1;
|
|
bool navigationPageHasNavigationBar = CurrentNavigationPage != null && NavigationPage.GetHasNavigationBar(CurrentNavigationPage.CurrentPage);
|
|
//if we have MDP and Navigation , we let navigation choose
|
|
if (CurrentNavigationPage != null && hasMasterDetailPage)
|
|
{
|
|
return NavigationPage.GetHasNavigationBar(CurrentNavigationPage.CurrentPage);
|
|
}
|
|
return navigationPageHasNavigationBar || (hasMasterDetailPage && !navigated);
|
|
}
|
|
|
|
bool ShouldUpdateActionBarUpColor()
|
|
{
|
|
bool hasMasterDetailPage = CurrentMasterDetailPage != null;
|
|
bool navigated = CurrentNavigationPage != null && ((INavigationPageController)CurrentNavigationPage).StackDepth > 1;
|
|
return (hasMasterDetailPage && navigated) || !hasMasterDetailPage;
|
|
}
|
|
|
|
void ShowActionBar()
|
|
{
|
|
ReloadToolbarItems();
|
|
UpdateActionBarTitle();
|
|
UpdateActionBarBackgroundColor();
|
|
UpdateActionBarTextColor();
|
|
ActionBar.Show();
|
|
}
|
|
|
|
void ToolbarTrackerOnCollectionChanged(object sender, EventArgs eventArgs)
|
|
{
|
|
ReloadToolbarItems();
|
|
}
|
|
|
|
bool UpButtonShouldNavigate()
|
|
{
|
|
if (CurrentNavigationPage == null)
|
|
return false;
|
|
|
|
bool pagePushed = ((INavigationPageController)CurrentNavigationPage).StackDepth > 1;
|
|
bool pushedPageHasBackButton = NavigationPage.GetHasBackButton(CurrentNavigationPage.CurrentPage);
|
|
|
|
return pagePushed && pushedPageHasBackButton;
|
|
}
|
|
|
|
void UpdateActionBarHomeAsUp(ActionBar actionBar)
|
|
{
|
|
bool showHomeAsUp = ShouldShowActionBarTitleArea() && (CurrentMasterDetailPage != null || UpButtonShouldNavigate());
|
|
actionBar.SetDisplayHomeAsUpEnabled(showHomeAsUp);
|
|
}
|
|
|
|
void UpdateActionBarTitle()
|
|
{
|
|
Page view = null;
|
|
if (CurrentNavigationPage != null)
|
|
view = CurrentNavigationPage.CurrentPage;
|
|
else if (CurrentTabbedPage != null)
|
|
view = CurrentTabbedPage.CurrentPage;
|
|
|
|
if (view == null || _activity == null)
|
|
return;
|
|
|
|
ActionBar actionBar = _activity.ActionBar;
|
|
|
|
var useLogo = false;
|
|
var showHome = false;
|
|
var showTitle = false;
|
|
|
|
if (ShouldShowActionBarTitleArea())
|
|
{
|
|
actionBar.Title = view.Title;
|
|
FileImageSource titleIcon = NavigationPage.GetTitleIcon(view);
|
|
if (!string.IsNullOrWhiteSpace(titleIcon))
|
|
{
|
|
var iconBitmap = new BitmapDrawable(_context.Resources, ResourceManager.GetBitmap(_context.Resources, titleIcon));
|
|
if (iconBitmap != null && iconBitmap.Bitmap != null)
|
|
actionBar.SetLogo(iconBitmap);
|
|
|
|
useLogo = true;
|
|
showHome = true;
|
|
showTitle = true;
|
|
}
|
|
else
|
|
{
|
|
showHome = true;
|
|
showTitle = true;
|
|
}
|
|
}
|
|
|
|
ActionBarDisplayOptions options = 0;
|
|
if (useLogo)
|
|
options = options | ActionBarDisplayOptions.UseLogo;
|
|
if (showHome)
|
|
options = options | ActionBarDisplayOptions.ShowHome;
|
|
if (showTitle)
|
|
options = options | ActionBarDisplayOptions.ShowTitle;
|
|
actionBar.SetDisplayOptions(options, ActionBarDisplayOptions.UseLogo | ActionBarDisplayOptions.ShowTitle | ActionBarDisplayOptions.ShowHome);
|
|
|
|
UpdateActionBarHomeAsUp(actionBar);
|
|
}
|
|
|
|
void UpdateActionBarUpImageColor()
|
|
{
|
|
if (_activity == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
Color navigationBarTextColor = CurrentNavigationPage == null ? Color.Default : CurrentNavigationPage.BarTextColor;
|
|
ImageView actionBarUpImageView = null;
|
|
|
|
int actionBarUpId = _activity.Resources.GetIdentifier("up", "id", "android");
|
|
if (actionBarUpId > 0)
|
|
actionBarUpImageView = _activity.FindViewById<ImageView>(actionBarUpId);
|
|
|
|
if (actionBarUpImageView != null && navigationBarTextColor != Color.Default)
|
|
{
|
|
if (ShouldUpdateActionBarUpColor())
|
|
actionBarUpImageView.SetColorFilter(navigationBarTextColor.ToAndroid(), PorterDuff.Mode.SrcIn);
|
|
else
|
|
actionBarUpImageView.SetColorFilter(null);
|
|
}
|
|
else if (actionBarUpImageView != null && navigationBarTextColor == Color.Default)
|
|
actionBarUpImageView.SetColorFilter(null);
|
|
}
|
|
|
|
internal static int GenerateViewId()
|
|
{
|
|
// getting unique Id's is an art, and I consider myself the Jackson Pollock of the field
|
|
if ((int)Build.VERSION.SdkInt >= 17)
|
|
return global::Android.Views.View.GenerateViewId();
|
|
|
|
// Numbers higher than this range reserved for xml
|
|
// If we roll over, it can be exceptionally problematic for the user if they are still retaining things, android's internal implementation is
|
|
// basically identical to this except they do a lot of locking we don't have to because we know we only do this
|
|
// from the UI thread
|
|
if (s_id >= 0x00ffffff)
|
|
s_id = 0x00000400;
|
|
return s_id++;
|
|
}
|
|
|
|
static int s_id = 0x00000400;
|
|
|
|
#region Previewer Stuff
|
|
|
|
internal static readonly BindableProperty PageContextProperty =
|
|
BindableProperty.CreateAttached("PageContext", typeof(Context), typeof(Platform), null);
|
|
|
|
internal Platform(Context context) : this(context, false)
|
|
{
|
|
// we have this overload instead of using a default value for
|
|
// the 'embedded' bool parameter so the previewer can find it via reflection
|
|
}
|
|
|
|
internal static void SetPageContext(BindableObject bindable, Context context)
|
|
{
|
|
// Set a context for this page and its child controls
|
|
bindable.SetValue(PageContextProperty, context);
|
|
}
|
|
|
|
static Context GetPreviewerContext(Element element)
|
|
{
|
|
// Walk up the tree and find the Page this element is hosted in
|
|
Element parent = element;
|
|
while (!Application.IsApplicationOrNull(parent.RealParent))
|
|
{
|
|
parent = parent.RealParent;
|
|
}
|
|
|
|
// If a page is found, return the PageContext set by the previewer for that page (if any)
|
|
return (parent as Page)?.GetValue(PageContextProperty) as Context;
|
|
}
|
|
|
|
#endregion
|
|
|
|
internal class DefaultRenderer : VisualElementRenderer<View>
|
|
{
|
|
public bool NotReallyHandled { get; private set; }
|
|
IOnTouchListener _touchListener;
|
|
|
|
[Obsolete("This constructor is obsolete as of version 2.5. Please use DefaultRenderer(Context) instead.")]
|
|
public DefaultRenderer()
|
|
{
|
|
}
|
|
|
|
readonly MotionEventHelper _motionEventHelper = new MotionEventHelper();
|
|
|
|
public DefaultRenderer(Context context) : base(context)
|
|
{
|
|
ChildrenDrawingOrderEnabled = true;
|
|
}
|
|
|
|
internal void NotifyFakeHandling()
|
|
{
|
|
NotReallyHandled = true;
|
|
}
|
|
|
|
public override bool OnTouchEvent(MotionEvent e)
|
|
{
|
|
if (base.OnTouchEvent(e))
|
|
return true;
|
|
|
|
return _motionEventHelper.HandleMotionEvent(Parent, e);
|
|
}
|
|
|
|
protected override void OnElementChanged(ElementChangedEventArgs<View> e)
|
|
{
|
|
base.OnElementChanged(e);
|
|
|
|
_motionEventHelper.UpdateElement(e.NewElement);
|
|
}
|
|
|
|
public override bool DispatchTouchEvent(MotionEvent e)
|
|
{
|
|
#region Excessive explanation
|
|
// Normally dispatchTouchEvent feeds the touch events to its children one at a time, top child first,
|
|
// (and only to the children in the hit-test area of the event) stopping as soon as one of them has handled
|
|
// the event.
|
|
|
|
// But to be consistent across the platforms, we don't want this behavior; if an element is not input transparent
|
|
// we don't want an event to "pass through it" and be handled by an element "behind/under" it. We just want the processing
|
|
// to end after the first non-transparent child, regardless of whether the event has been handled.
|
|
|
|
// This is only an issue for a couple of controls; the interactive controls (switch, button, slider, etc) already "handle" their touches
|
|
// and the events don't propagate to other child controls. But for image, label, and box that doesn't happen. We can't have those controls
|
|
// lie about their events being handled because then the events won't propagate to *parent* controls (e.g., a frame with a label in it would
|
|
// never get a tap gesture from the label). In other words, we *want* parent propagation, but *do not want* sibling propagation. So we need to short-circuit
|
|
// base.DispatchTouchEvent here, but still return "false".
|
|
|
|
// Duplicating the logic of ViewGroup.dispatchTouchEvent and modifying it slightly for our purposes is a non-starter; the method is too
|
|
// complex and does a lot of micro-optimization. Instead, we provide a signalling mechanism for the controls which don't already "handle" touch
|
|
// events to tell us that they will be lying about handling their event; they then return "true" to short-circuit base.DispatchTouchEvent.
|
|
|
|
// The container gets this message and after it gets the "handled" result from dispatchTouchEvent,
|
|
// it then knows to ignore that result and return false/unhandled. This allows the event to propagate up the tree.
|
|
#endregion
|
|
|
|
NotReallyHandled = false;
|
|
|
|
var result = base.DispatchTouchEvent(e);
|
|
|
|
if (result && NotReallyHandled)
|
|
{
|
|
// If the child control returned true from its touch event handler but signalled that it was a fake "true", then we
|
|
// don't consider the event truly "handled" yet.
|
|
// Since a child control short-circuited the normal dispatchTouchEvent stuff, this layout never got the chance for
|
|
// IOnTouchListener.OnTouch and the OnTouchEvent override to try handling the touches; we'll do that now
|
|
// Any associated Touch Listeners are called from DispatchTouchEvents if all children of this view return false
|
|
// So here we are simulating both calls that would have typically been called from inside DispatchTouchEvent
|
|
// but were not called due to the fake "true"
|
|
result = _touchListener?.OnTouch(this, e) ?? false;
|
|
return result || OnTouchEvent(e);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
public override void SetOnTouchListener(IOnTouchListener l)
|
|
{
|
|
_touchListener = l;
|
|
base.SetOnTouchListener(l);
|
|
}
|
|
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
if (disposing)
|
|
_touchListener = null;
|
|
|
|
base.Dispose(disposing);
|
|
}
|
|
}
|
|
|
|
#region IPlatformEngine implementation
|
|
|
|
void IPlatformLayout.OnLayout(bool changed, int l, int t, int r, int b)
|
|
{
|
|
if (changed)
|
|
{
|
|
// ActionBar title text color resets on rotation, make sure to update
|
|
UpdateActionBarTextColor();
|
|
foreach (Page modal in _navModel.Roots.ToList())
|
|
modal.Layout(new Rectangle(0, 0, _context.FromPixels(r - l), _context.FromPixels(b - t)));
|
|
}
|
|
|
|
foreach (IVisualElementRenderer view in _navModel.Roots.Select(GetRenderer))
|
|
view?.UpdateLayout();
|
|
}
|
|
|
|
SizeRequest IPlatform.GetNativeSize(VisualElement view, double widthConstraint, double heightConstraint)
|
|
{
|
|
Performance.Start(out string reference);
|
|
|
|
// FIXME: potential crash
|
|
IVisualElementRenderer visualElementRenderer = GetRenderer(view);
|
|
|
|
// negative numbers have special meanings to android they don't to us
|
|
widthConstraint = widthConstraint <= -1 ? double.PositiveInfinity : _context.ToPixels(widthConstraint);
|
|
heightConstraint = heightConstraint <= -1 ? double.PositiveInfinity : _context.ToPixels(heightConstraint);
|
|
|
|
bool widthConstrained = !double.IsPositiveInfinity(widthConstraint);
|
|
bool heightConstrained = !double.IsPositiveInfinity(heightConstraint);
|
|
|
|
int widthMeasureSpec = widthConstrained
|
|
? MeasureSpecFactory.MakeMeasureSpec((int)widthConstraint, MeasureSpecMode.AtMost)
|
|
: MeasureSpecFactory.MakeMeasureSpec(0, MeasureSpecMode.Unspecified);
|
|
|
|
int heightMeasureSpec = heightConstrained
|
|
? MeasureSpecFactory.MakeMeasureSpec((int)heightConstraint, MeasureSpecMode.AtMost)
|
|
: MeasureSpecFactory.MakeMeasureSpec(0, MeasureSpecMode.Unspecified);
|
|
|
|
SizeRequest rawResult = visualElementRenderer.GetDesiredSize(widthMeasureSpec, heightMeasureSpec);
|
|
if (rawResult.Minimum == Size.Zero)
|
|
rawResult.Minimum = rawResult.Request;
|
|
var result = new SizeRequest(new Size(_context.FromPixels(rawResult.Request.Width), _context.FromPixels(rawResult.Request.Height)),
|
|
new Size(_context.FromPixels(rawResult.Minimum.Width), _context.FromPixels(rawResult.Minimum.Height)));
|
|
|
|
if ((widthConstrained && result.Request.Width < widthConstraint)
|
|
|| (heightConstrained && result.Request.Height < heightConstraint))
|
|
{
|
|
// Do a final exact measurement in case the native control needs to fill the container
|
|
(visualElementRenderer as IViewRenderer)?.MeasureExactly();
|
|
}
|
|
|
|
Performance.Stop(reference);
|
|
return result;
|
|
}
|
|
|
|
bool _navAnimationInProgress;
|
|
|
|
internal bool NavAnimationInProgress
|
|
{
|
|
get { return _navAnimationInProgress; }
|
|
set
|
|
{
|
|
if (_navAnimationInProgress == value)
|
|
return;
|
|
_navAnimationInProgress = value;
|
|
if (value)
|
|
MessagingCenter.Send(this, CloseContextActionsSignalName);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|