53 lines
1.4 KiB
C#
53 lines
1.4 KiB
C#
using System.Windows;
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using System.Windows.Documents;
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using System.Windows.Media;
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using System.Windows.Threading;
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namespace Qrakhen.Qamp.Editor.Controls;
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public class Caret : Adorner
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{
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private readonly Pen _pen;
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private readonly double _height;
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private readonly Brush _brush;
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private bool _blink;
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private Point _cursorPosition;
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private DispatcherTimer _timer;
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public Caret(UIElement adornedElement, Brush brush, double height = 18, double thickness = 1.72) : base(adornedElement)
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{
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IsHitTestVisible = false;
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_height = height;
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_brush = brush;
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_pen = new Pen(brush, 1.5);
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_timer = new DispatcherTimer();
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_timer.Interval = TimeSpan.FromMilliseconds(428);
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_timer.Tick += new EventHandler((s, e) => {
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Toggle(_blink = !_blink);
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});
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_timer.Start();
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}
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public void Toggle(bool hide)
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{
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_pen.Brush = hide ? Brushes.Transparent : _brush;
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}
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public void UpdatePosition(Point newPosition)
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{
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_timer.Stop();
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Toggle(_blink = false);
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_cursorPosition = newPosition;
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InvalidateVisual();
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_timer.Start();
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}
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protected override void OnRender(DrawingContext drawingContext)
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{
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Point startPoint = new(_cursorPosition.X, _cursorPosition.Y);
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Point endPoint = new(_cursorPosition.X, _cursorPosition.Y + _height);
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drawingContext.DrawLine(_pen, startPoint, endPoint);
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}
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}
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