105 lines
3.6 KiB
C#
105 lines
3.6 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.Presenters;
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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_ContentPresenter, typeof(ContentPresenter))]
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[TemplatePart(PART_BadgeContainer, typeof(Border))]
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[TemplatePart(PART_BadgeContentPresenter, typeof(ContentPresenter))]
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public class Badge: ContentControl
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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_BadgeContentPresenter = "PART_BadgeContentPresenter";
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private ContentPresenter? _content;
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private Border? _badgeContainer;
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private ContentPresenter? _badgeContent;
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public static readonly StyledProperty<ControlTheme> BadgeThemeProperty = AvaloniaProperty.Register<Badge, ControlTheme>(
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nameof(BadgeTheme));
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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 static readonly StyledProperty<bool> DotProperty = AvaloniaProperty.Register<Badge, bool>(
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nameof(Dot));
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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 static readonly StyledProperty<object?> BadgeContentProperty = AvaloniaProperty.Register<Badge, object?>(
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nameof(BadgeContent));
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public object? BadgeContent
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{
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get => GetValue(BadgeContentProperty);
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set => SetValue(BadgeContentProperty, value);
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}
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public static readonly StyledProperty<CornerPosition> CornerPositionProperty = AvaloniaProperty.Register<Badge, CornerPosition>(
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nameof(CornerPosition));
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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 static readonly StyledProperty<int> OverflowCountProperty = AvaloniaProperty.Register<Badge, int>(
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nameof(OverflowCount));
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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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static Badge()
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{
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BadgeContentProperty.Changed.AddClassHandler<Badge>((badge, args) => badge.UpdateBadgePosition());
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}
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protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
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{
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base.OnApplyTemplate(e);
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_content = e.NameScope.Find<ContentPresenter>(PART_ContentPresenter);
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_badgeContainer = e.NameScope.Find<Border>(PART_BadgeContainer);
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_badgeContent = e.NameScope.Find<ContentPresenter>(PART_BadgeContentPresenter);
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}
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protected override void OnLoaded()
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{
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base.OnLoaded();
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UpdateBadgePosition();
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}
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protected override Size ArrangeOverride(Size finalSize)
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{
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UpdateBadgePosition();
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return base.ArrangeOverride(finalSize);
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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 && _content?.Child is not null)
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{
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_badgeContainer.RenderTransform = new TransformGroup()
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{
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Children = new Transforms()
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{
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new TranslateTransform(horizontal*_badgeContainer.Bounds.Width/2,vertical*_badgeContainer.Bounds.Height/2)
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}
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};
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}
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}
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} |