зеркало из https://github.com/DeGsoft/maui-linux.git
513 строки
14 KiB
C#
513 строки
14 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Threading.Tasks;
|
|
using Windows.ApplicationModel.Core;
|
|
using Windows.Foundation.Metadata;
|
|
using Windows.UI;
|
|
using Windows.UI.Core;
|
|
using Windows.UI.Popups;
|
|
using Windows.UI.ViewManagement;
|
|
using Windows.UI.Xaml;
|
|
using Windows.UI.Xaml.Controls;
|
|
using Xamarin.Forms.Internals;
|
|
|
|
namespace Xamarin.Forms.Platform.UWP
|
|
{
|
|
public abstract class Platform : IPlatform, INavigation
|
|
{
|
|
static Task<bool> s_currentAlert;
|
|
|
|
internal static StatusBar MobileStatusBar => ApiInformation.IsTypePresent("Windows.UI.ViewManagement.StatusBar") ? StatusBar.GetForCurrentView() : null;
|
|
|
|
internal static readonly BindableProperty RendererProperty = BindableProperty.CreateAttached("Renderer",
|
|
typeof(IVisualElementRenderer), typeof(Windows.Foundation.Metadata.Platform), default(IVisualElementRenderer));
|
|
|
|
public static IVisualElementRenderer GetRenderer(VisualElement element)
|
|
{
|
|
return (IVisualElementRenderer)element.GetValue(RendererProperty);
|
|
}
|
|
|
|
public static void SetRenderer(VisualElement element, IVisualElementRenderer value)
|
|
{
|
|
element.SetValue(RendererProperty, value);
|
|
element.IsPlatformEnabled = value != null;
|
|
}
|
|
|
|
public static IVisualElementRenderer CreateRenderer(VisualElement element)
|
|
{
|
|
if (element == null)
|
|
throw new ArgumentNullException(nameof(element));
|
|
|
|
IVisualElementRenderer renderer = Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element) ??
|
|
new DefaultRenderer();
|
|
renderer.SetElement(element);
|
|
return renderer;
|
|
}
|
|
|
|
internal static Platform Current
|
|
{
|
|
get
|
|
{
|
|
var frame = Window.Current?.Content as Windows.UI.Xaml.Controls.Frame;
|
|
var wbp = frame?.Content as WindowsBasePage;
|
|
return wbp?.Platform;
|
|
}
|
|
}
|
|
|
|
internal Platform(Windows.UI.Xaml.Controls.Page page)
|
|
{
|
|
if (page == null)
|
|
throw new ArgumentNullException(nameof(page));
|
|
|
|
_page = page;
|
|
|
|
_container = new Canvas
|
|
{
|
|
Style = (Windows.UI.Xaml.Style)Windows.UI.Xaml.Application.Current.Resources["RootContainerStyle"]
|
|
};
|
|
|
|
_page.Content = _container;
|
|
|
|
_container.SizeChanged += OnRendererSizeChanged;
|
|
|
|
MessagingCenter.Subscribe(this, Page.BusySetSignalName, (Page sender, bool enabled) =>
|
|
{
|
|
Windows.UI.Xaml.Controls.ProgressBar indicator = GetBusyIndicator();
|
|
indicator.Visibility = enabled ? Visibility.Visible : Visibility.Collapsed;
|
|
});
|
|
|
|
_toolbarTracker.CollectionChanged += OnToolbarItemsChanged;
|
|
|
|
UpdateBounds();
|
|
|
|
InitializeStatusBar();
|
|
|
|
SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;
|
|
}
|
|
|
|
internal void SetPage(Page newRoot)
|
|
{
|
|
if (newRoot == null)
|
|
throw new ArgumentNullException(nameof(newRoot));
|
|
|
|
_navModel.Clear();
|
|
|
|
_navModel.Push(newRoot, null);
|
|
SetCurrent(newRoot, true);
|
|
Application.Current.NavigationProxy.Inner = this;
|
|
}
|
|
|
|
internal void SetPlatformDisconnected(VisualElement visualElement)
|
|
{
|
|
visualElement.Platform = this;
|
|
}
|
|
|
|
public IReadOnlyList<Page> NavigationStack
|
|
{
|
|
get { return _navModel.Tree.Last(); }
|
|
}
|
|
|
|
public IReadOnlyList<Page> ModalStack
|
|
{
|
|
get { return _navModel.Modals.ToList(); }
|
|
}
|
|
|
|
Task INavigation.PushAsync(Page root)
|
|
{
|
|
return ((INavigation)this).PushAsync(root, true);
|
|
}
|
|
|
|
Task<Page> INavigation.PopAsync()
|
|
{
|
|
return ((INavigation)this).PopAsync(true);
|
|
}
|
|
|
|
Task INavigation.PopToRootAsync()
|
|
{
|
|
return ((INavigation)this).PopToRootAsync(true);
|
|
}
|
|
|
|
Task INavigation.PushAsync(Page root, bool animated)
|
|
{
|
|
throw new InvalidOperationException("PushAsync is not supported globally on Windows, please use a NavigationPage.");
|
|
}
|
|
|
|
Task<Page> INavigation.PopAsync(bool animated)
|
|
{
|
|
throw new InvalidOperationException("PopAsync is not supported globally on Windows, please use a NavigationPage.");
|
|
}
|
|
|
|
Task INavigation.PopToRootAsync(bool animated)
|
|
{
|
|
throw new InvalidOperationException(
|
|
"PopToRootAsync is not supported globally on Windows, please use a NavigationPage.");
|
|
}
|
|
|
|
void INavigation.RemovePage(Page page)
|
|
{
|
|
throw new InvalidOperationException("RemovePage is not supported globally on Windows, please use a NavigationPage.");
|
|
}
|
|
|
|
void INavigation.InsertPageBefore(Page page, Page before)
|
|
{
|
|
throw new InvalidOperationException(
|
|
"InsertPageBefore is not supported globally on Windows, please use a NavigationPage.");
|
|
}
|
|
|
|
Task INavigation.PushModalAsync(Page page)
|
|
{
|
|
return ((INavigation)this).PushModalAsync(page, true);
|
|
}
|
|
|
|
Task<Page> INavigation.PopModalAsync()
|
|
{
|
|
return ((INavigation)this).PopModalAsync(true);
|
|
}
|
|
|
|
Task INavigation.PushModalAsync(Page page, bool animated)
|
|
{
|
|
if (page == null)
|
|
throw new ArgumentNullException(nameof(page));
|
|
|
|
var tcs = new TaskCompletionSource<bool>();
|
|
_navModel.PushModal(page);
|
|
SetCurrent(page, completedCallback: () => tcs.SetResult(true));
|
|
return tcs.Task;
|
|
}
|
|
|
|
Task<Page> INavigation.PopModalAsync(bool animated)
|
|
{
|
|
var tcs = new TaskCompletionSource<Page>();
|
|
Page result = _navModel.PopModal();
|
|
SetCurrent(_navModel.CurrentPage, true, () => tcs.SetResult(result));
|
|
return tcs.Task;
|
|
}
|
|
|
|
SizeRequest IPlatform.GetNativeSize(VisualElement element, double widthConstraint, double heightConstraint)
|
|
{
|
|
// Hack around the fact that Canvas ignores the child constraints.
|
|
// It is entirely possible using Canvas as our base class is not wise.
|
|
// FIXME: This should not be an if statement. Probably need to define an interface here.
|
|
if (widthConstraint > 0 && heightConstraint > 0)
|
|
{
|
|
IVisualElementRenderer elementRenderer = GetRenderer(element);
|
|
if (elementRenderer != null)
|
|
return elementRenderer.GetDesiredSize(widthConstraint, heightConstraint);
|
|
}
|
|
|
|
return new SizeRequest();
|
|
}
|
|
|
|
internal virtual Rectangle ContainerBounds
|
|
{
|
|
get { return _bounds; }
|
|
}
|
|
|
|
internal void UpdatePageSizes()
|
|
{
|
|
Rectangle bounds = ContainerBounds;
|
|
if (bounds.IsEmpty)
|
|
return;
|
|
foreach (Page root in _navModel.Roots)
|
|
{
|
|
root.Layout(bounds);
|
|
IVisualElementRenderer renderer = GetRenderer(root);
|
|
if (renderer != null)
|
|
{
|
|
renderer.ContainerElement.Width = _container.ActualWidth;
|
|
renderer.ContainerElement.Height = _container.ActualHeight;
|
|
}
|
|
}
|
|
}
|
|
|
|
Rectangle _bounds;
|
|
readonly Canvas _container;
|
|
readonly Windows.UI.Xaml.Controls.Page _page;
|
|
Windows.UI.Xaml.Controls.ProgressBar _busyIndicator;
|
|
Page _currentPage;
|
|
readonly NavigationModel _navModel = new NavigationModel();
|
|
readonly ToolbarTracker _toolbarTracker = new ToolbarTracker();
|
|
readonly FileImageSourcePathConverter _fileImageSourcePathConverter = new FileImageSourcePathConverter();
|
|
Windows.UI.Xaml.Controls.ProgressBar GetBusyIndicator()
|
|
{
|
|
if (_busyIndicator == null)
|
|
{
|
|
_busyIndicator = new Windows.UI.Xaml.Controls.ProgressBar
|
|
{
|
|
IsIndeterminate = true,
|
|
Visibility = Visibility.Collapsed,
|
|
VerticalAlignment = VerticalAlignment.Top
|
|
};
|
|
|
|
Canvas.SetZIndex(_busyIndicator, 1);
|
|
_container.Children.Add(_busyIndicator);
|
|
}
|
|
|
|
return _busyIndicator;
|
|
}
|
|
|
|
internal bool BackButtonPressed()
|
|
{
|
|
Page lastRoot = _navModel.Roots.Last();
|
|
|
|
bool handled = lastRoot.SendBackButtonPressed();
|
|
|
|
if (!handled && _navModel.Tree.Count > 1)
|
|
{
|
|
Page removed = _navModel.PopModal();
|
|
if (removed != null)
|
|
{
|
|
SetCurrent(_navModel.CurrentPage, true);
|
|
handled = true;
|
|
}
|
|
}
|
|
|
|
return handled;
|
|
}
|
|
|
|
void OnRendererSizeChanged(object sender, SizeChangedEventArgs sizeChangedEventArgs)
|
|
{
|
|
UpdateBounds();
|
|
UpdatePageSizes();
|
|
}
|
|
|
|
async void SetCurrent(Page newPage, bool popping = false, Action completedCallback = null)
|
|
{
|
|
if (newPage == _currentPage)
|
|
return;
|
|
|
|
newPage.Platform = this;
|
|
|
|
if (_currentPage != null)
|
|
{
|
|
Page previousPage = _currentPage;
|
|
IVisualElementRenderer previousRenderer = GetRenderer(previousPage);
|
|
_container.Children.Remove(previousRenderer.ContainerElement);
|
|
|
|
if (popping)
|
|
{
|
|
previousPage.Cleanup();
|
|
// Un-parent the page; otherwise the Resources Changed Listeners won't be unhooked and the
|
|
// page will leak
|
|
previousPage.Parent = null;
|
|
}
|
|
}
|
|
|
|
newPage.Layout(ContainerBounds);
|
|
|
|
IVisualElementRenderer pageRenderer = newPage.GetOrCreateRenderer();
|
|
_container.Children.Add(pageRenderer.ContainerElement);
|
|
|
|
pageRenderer.ContainerElement.Width = _container.ActualWidth;
|
|
pageRenderer.ContainerElement.Height = _container.ActualHeight;
|
|
|
|
completedCallback?.Invoke();
|
|
|
|
_currentPage = newPage;
|
|
|
|
UpdateToolbarTracker();
|
|
|
|
await UpdateToolbarItems();
|
|
}
|
|
|
|
async void OnToolbarItemsChanged(object sender, EventArgs e)
|
|
{
|
|
await UpdateToolbarItems();
|
|
}
|
|
|
|
void UpdateToolbarTracker()
|
|
{
|
|
Page last = _navModel.Roots.Last();
|
|
if (last != null)
|
|
_toolbarTracker.Target = last;
|
|
}
|
|
|
|
void UpdateBounds()
|
|
{
|
|
_bounds = new Rectangle(0, 0, _page.ActualWidth, _page.ActualHeight);
|
|
|
|
StatusBar statusBar = MobileStatusBar;
|
|
if (statusBar != null)
|
|
{
|
|
bool landscape = Device.Info.CurrentOrientation.IsLandscape();
|
|
bool titleBar = CoreApplication.GetCurrentView().TitleBar.IsVisible;
|
|
double offset = landscape ? statusBar.OccludedRect.Width : statusBar.OccludedRect.Height;
|
|
|
|
_bounds = new Rectangle(0, 0, _page.ActualWidth - (landscape ? offset : 0), _page.ActualHeight - (landscape ? 0 : offset));
|
|
|
|
// Even if the MainPage is a ContentPage not inside of a NavigationPage, the calculated bounds
|
|
// assume the TitleBar is there even if it isn't visible. When UpdatePageSizes is called,
|
|
// _container.ActualWidth is correct because it's aware that the TitleBar isn't there, but the
|
|
// bounds aren't, and things can subsequently run under the StatusBar.
|
|
if (!titleBar)
|
|
{
|
|
_bounds.Width -= (_bounds.Width - _container.ActualWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
void InitializeStatusBar()
|
|
{
|
|
StatusBar statusBar = MobileStatusBar;
|
|
if (statusBar != null)
|
|
{
|
|
statusBar.Showing += (sender, args) => UpdateBounds();
|
|
statusBar.Hiding += (sender, args) => UpdateBounds();
|
|
|
|
// UWP 14393 Bug: If RequestedTheme is Light (which it is by default), then the
|
|
// status bar uses White Foreground with White Background.
|
|
// UWP 10586 Bug: If RequestedTheme is Light (which it is by default), then the
|
|
// status bar uses Black Foreground with Black Background.
|
|
// Since the Light theme should have a Black on White status bar, we will set it explicitly.
|
|
// This can be overriden by setting the status bar colors in App.xaml.cs OnLaunched.
|
|
|
|
if (statusBar.BackgroundColor == null && statusBar.ForegroundColor == null && Windows.UI.Xaml.Application.Current.RequestedTheme == ApplicationTheme.Light)
|
|
{
|
|
statusBar.BackgroundColor = Colors.White;
|
|
statusBar.ForegroundColor = Colors.Black;
|
|
statusBar.BackgroundOpacity = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
internal async Task UpdateToolbarItems()
|
|
{
|
|
var toolbarProvider = GetToolbarProvider();
|
|
|
|
if (toolbarProvider == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
CommandBar commandBar = await toolbarProvider.GetCommandBarAsync();
|
|
|
|
if (commandBar == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
commandBar.PrimaryCommands.Clear();
|
|
commandBar.SecondaryCommands.Clear();
|
|
|
|
var toolBarForegroundBinder = GetToolbarProvider() as IToolBarForegroundBinder;
|
|
|
|
foreach (ToolbarItem item in _toolbarTracker.ToolbarItems.OrderBy(ti => ti.Priority))
|
|
{
|
|
toolBarForegroundBinder?.BindForegroundColor(commandBar);
|
|
|
|
var button = new AppBarButton();
|
|
button.SetBinding(AppBarButton.LabelProperty, "Text");
|
|
button.SetBinding(AppBarButton.IconProperty, "Icon", _fileImageSourcePathConverter);
|
|
button.Command = new MenuItemCommand(item);
|
|
button.DataContext = item;
|
|
|
|
ToolbarItemOrder order = item.Order == ToolbarItemOrder.Default ? ToolbarItemOrder.Primary : item.Order;
|
|
if (order == ToolbarItemOrder.Primary)
|
|
{
|
|
toolBarForegroundBinder?.BindForegroundColor(button);
|
|
commandBar.PrimaryCommands.Add(button);
|
|
}
|
|
else
|
|
{
|
|
commandBar.SecondaryCommands.Add(button);
|
|
}
|
|
}
|
|
}
|
|
|
|
internal IToolbarProvider GetToolbarProvider()
|
|
{
|
|
IToolbarProvider provider = null;
|
|
|
|
Page element = _currentPage;
|
|
while (element != null)
|
|
{
|
|
provider = GetRenderer(element) as IToolbarProvider;
|
|
if (provider != null)
|
|
break;
|
|
|
|
var pageContainer = element as IPageContainer<Page>;
|
|
element = pageContainer?.CurrentPage;
|
|
}
|
|
|
|
return provider;
|
|
}
|
|
|
|
internal static void SubscribeAlertsAndActionSheets()
|
|
{
|
|
MessagingCenter.Subscribe<Page, AlertArguments>(Window.Current, Page.AlertSignalName, OnPageAlert);
|
|
MessagingCenter.Subscribe<Page, ActionSheetArguments>(Window.Current, Page.ActionSheetSignalName, OnPageActionSheet);
|
|
}
|
|
|
|
static void OnPageActionSheet(object sender, ActionSheetArguments options)
|
|
{
|
|
bool userDidSelect = false;
|
|
var flyoutContent = new FormsFlyout(options);
|
|
|
|
var actionSheet = new Flyout
|
|
{
|
|
FlyoutPresenterStyle = (Windows.UI.Xaml.Style)Windows.UI.Xaml.Application.Current.Resources["FormsFlyoutPresenterStyle"],
|
|
Placement = Windows.UI.Xaml.Controls.Primitives.FlyoutPlacementMode.Full,
|
|
Content = flyoutContent
|
|
};
|
|
|
|
flyoutContent.OptionSelected += (s, e) =>
|
|
{
|
|
userDidSelect = true;
|
|
actionSheet.Hide();
|
|
};
|
|
|
|
actionSheet.Closed += (s, e) =>
|
|
{
|
|
if (!userDidSelect)
|
|
options.SetResult(null);
|
|
};
|
|
|
|
actionSheet.ShowAt(((Page)sender).GetOrCreateRenderer().ContainerElement);
|
|
}
|
|
|
|
static async void OnPageAlert(Page sender, AlertArguments options)
|
|
{
|
|
string content = options.Message ?? string.Empty;
|
|
string title = options.Title ?? string.Empty;
|
|
|
|
var alertDialog = new AlertDialog
|
|
{
|
|
Content = content,
|
|
Title = title,
|
|
VerticalScrollBarVisibility = Windows.UI.Xaml.Controls.ScrollBarVisibility.Auto
|
|
};
|
|
|
|
if (options.Cancel != null)
|
|
alertDialog.SecondaryButtonText = options.Cancel;
|
|
|
|
if (options.Accept != null)
|
|
alertDialog.PrimaryButtonText = options.Accept;
|
|
|
|
while (s_currentAlert != null)
|
|
{
|
|
await s_currentAlert;
|
|
}
|
|
|
|
s_currentAlert = ShowAlert(alertDialog);
|
|
options.SetResult(await s_currentAlert.ConfigureAwait(false));
|
|
s_currentAlert = null;
|
|
}
|
|
|
|
static async Task<bool> ShowAlert(ContentDialog alert)
|
|
{
|
|
ContentDialogResult result = await alert.ShowAsync();
|
|
|
|
return result == ContentDialogResult.Primary;
|
|
}
|
|
|
|
void OnBackRequested(object sender, BackRequestedEventArgs e)
|
|
{
|
|
Application app = Application.Current;
|
|
Page page = app?.MainPage;
|
|
if (page == null)
|
|
return;
|
|
e.Handled = BackButtonPressed();
|
|
}
|
|
}
|
|
} |