99 lines
3.3 KiB
C#
99 lines
3.3 KiB
C#
using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Controls.Metadata;
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using Avalonia.Controls.Primitives;
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using Avalonia.Media;
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using Avalonia.Styling;
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using Ursa.Common;
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namespace Ursa.Controls;
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[TemplatePart(PART_BadgeContainer, typeof(Control))]
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public class Badge : HeaderedContentControl
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{
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public const string PART_ContentPresenter = "PART_ContentPresenter";
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public const string PART_BadgeContainer = "PART_BadgeContainer";
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public const string PART_HeaderPresenter = "PART_HeaderPresenter";
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public static readonly StyledProperty<ControlTheme> BadgeThemeProperty =
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AvaloniaProperty.Register<Badge, ControlTheme>(nameof(BadgeTheme));
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public static readonly StyledProperty<bool> DotProperty =
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AvaloniaProperty.Register<Badge, bool>(nameof(Dot));
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public static readonly StyledProperty<CornerPosition> CornerPositionProperty =
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AvaloniaProperty.Register<Badge, CornerPosition>(nameof(CornerPosition));
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public static readonly StyledProperty<int> OverflowCountProperty =
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AvaloniaProperty.Register<Badge, int>(nameof(OverflowCount));
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public static readonly StyledProperty<double> BadgeFontSizeProperty =
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AvaloniaProperty.Register<Badge, double>(nameof(BadgeFontSize));
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private Control? _badgeContainer;
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static Badge()
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{
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CornerPositionProperty.Changed.AddClassHandler<Badge>((badge, _) => badge.UpdateBadgePosition());
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DotProperty.Changed.AddClassHandler<Badge>((badge, _) => badge.UpdateBadgePosition());
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}
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public ControlTheme BadgeTheme
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{
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get => GetValue(BadgeThemeProperty);
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set => SetValue(BadgeThemeProperty, value);
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}
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public bool Dot
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{
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get => GetValue(DotProperty);
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set => SetValue(DotProperty, value);
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}
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public CornerPosition CornerPosition
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{
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get => GetValue(CornerPositionProperty);
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set => SetValue(CornerPositionProperty, value);
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}
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public int OverflowCount
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{
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get => GetValue(OverflowCountProperty);
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set => SetValue(OverflowCountProperty, value);
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}
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public double BadgeFontSize
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{
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get => GetValue(BadgeFontSizeProperty);
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set => SetValue(BadgeFontSizeProperty, value);
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}
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protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
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{
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_badgeContainer?.RemoveHandler(SizeChangedEvent, OnBadgeSizeChanged);
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base.OnApplyTemplate(e);
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_badgeContainer = e.NameScope.Find<Control>(PART_BadgeContainer);
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_badgeContainer?.AddHandler(SizeChangedEvent, OnBadgeSizeChanged);
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}
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private void OnBadgeSizeChanged(object? sender, SizeChangedEventArgs e)
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{
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UpdateBadgePosition();
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}
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private void UpdateBadgePosition()
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{
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var vertical = CornerPosition is CornerPosition.BottomLeft or CornerPosition.BottomRight ? 1 : -1;
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var horizontal = CornerPosition is CornerPosition.TopRight or CornerPosition.BottomRight ? 1 : -1;
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if (_badgeContainer is not null && Presenter?.Child is not null)
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_badgeContainer.RenderTransform = new TransformGroup
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{
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Children =
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[
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new TranslateTransform(
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horizontal * _badgeContainer.Bounds.Width / 2,
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vertical * _badgeContainer.Bounds.Height / 2)
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]
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};
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}
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} |