зеркало из https://github.com/DeGsoft/maui-linux.git
130 строки
3.8 KiB
C#
130 строки
3.8 KiB
C#
using System.Threading.Tasks;
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using Windows.UI.Xaml;
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using Windows.UI.Xaml.Controls;
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using Windows.UI.Xaml.Media;
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using Xamarin.Forms.PlatformConfiguration.WindowsSpecific;
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namespace Xamarin.Forms.Platform.UWP
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{
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public class FormsPivot : Pivot, IToolbarProvider
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{
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public static readonly DependencyProperty TitleVisibilityProperty = DependencyProperty.Register(nameof(TitleVisibility), typeof(Visibility), typeof(FormsPivot), new PropertyMetadata(Visibility.Collapsed));
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public static readonly DependencyProperty ToolbarForegroundProperty = DependencyProperty.Register(nameof(ToolbarForeground), typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
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public static readonly DependencyProperty ToolbarBackgroundProperty = DependencyProperty.Register(nameof(ToolbarBackground), typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
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CommandBar _commandBar;
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readonly ToolbarPlacementHelper _toolbarPlacementHelper = new ToolbarPlacementHelper();
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public bool ShouldShowToolbar
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{
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get { return _toolbarPlacementHelper.ShouldShowToolBar; }
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set { _toolbarPlacementHelper.ShouldShowToolBar = value; }
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}
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TaskCompletionSource<CommandBar> _commandBarTcs;
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ToolbarPlacement _toolbarPlacement;
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bool _toolbarDynamicOverflowEnabled = true;
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public Brush ToolbarBackground
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{
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get { return (Brush)GetValue(ToolbarBackgroundProperty); }
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set { SetValue(ToolbarBackgroundProperty, value); }
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}
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public Brush ToolbarForeground
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{
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get { return (Brush)GetValue(ToolbarForegroundProperty); }
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set { SetValue(ToolbarForegroundProperty, value); }
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}
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public Visibility TitleVisibility
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{
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get { return (Visibility)GetValue(TitleVisibilityProperty); }
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set { SetValue(TitleVisibilityProperty, value); }
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}
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public ToolbarPlacement ToolbarPlacement
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{
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get { return _toolbarPlacement; }
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set
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{
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_toolbarPlacement = value;
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_toolbarPlacementHelper. UpdateToolbarPlacement();
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}
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}
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public bool ToolbarDynamicOverflowEnabled
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{
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get { return _toolbarDynamicOverflowEnabled; }
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set
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{
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_toolbarDynamicOverflowEnabled = value;
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UpdateToolbarDynamicOverflowEnabled();
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}
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}
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Task<CommandBar> IToolbarProvider.GetCommandBarAsync()
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{
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if (_commandBar != null)
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return Task.FromResult(_commandBar);
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_commandBarTcs = new TaskCompletionSource<CommandBar>();
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ApplyTemplate();
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return _commandBarTcs.Task;
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}
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protected override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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_commandBar = GetTemplateChild("CommandBar") as CommandBar;
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_toolbarPlacementHelper.Initialize(_commandBar, () => ToolbarPlacement, GetTemplateChild);
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UpdateToolbarDynamicOverflowEnabled();
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TaskCompletionSource<CommandBar> tcs = _commandBarTcs;
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tcs?.SetResult(_commandBar);
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}
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protected override DependencyObject GetContainerForItemOverride()
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{
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var containerItem = base.GetContainerForItemOverride();
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var pivotItem = containerItem as PivotItem;
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if (pivotItem != null)
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{
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// We need to know when the data context changes so we can set the automation name to the page title
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pivotItem.DataContextChanged += SetPivotItemAutomationName;
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}
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return containerItem;
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}
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static void SetPivotItemAutomationName(FrameworkElement frameworkElement,
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DataContextChangedEventArgs dataContextChangedEventArgs)
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{
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var pivotItem = frameworkElement as PivotItem;
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var page = dataContextChangedEventArgs.NewValue as Page;
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if (pivotItem != null && page?.Title != null)
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{
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// This way we can find tabs with automation (for testing, etc.)
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Windows.UI.Xaml.Automation.AutomationProperties.SetName(pivotItem, page.Title);
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}
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}
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void UpdateToolbarDynamicOverflowEnabled()
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{
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if (_commandBar != null)
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{
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_commandBar.IsDynamicOverflowEnabled = ToolbarDynamicOverflowEnabled;
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}
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}
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}
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} |