72 lines
1.9 KiB
C#
72 lines
1.9 KiB
C#
using System;
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using System.Linq;
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using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Markup.Xaml;
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using Avalonia.Media;
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using Masuit.Tools;
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namespace DispenserUI.Views.Controls;
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public partial class Histogram : UserControl
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{
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public static readonly DirectProperty<Histogram, double[]> DataProperty =
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AvaloniaProperty.RegisterDirect<Histogram, double[]>(
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nameof(Data),
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o => o.Data,
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(o, v) => o.Data = v);
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private double[] _data = Array.Empty<double>();
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public Histogram()
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{
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InitializeComponent();
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}
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public double[] Data
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{
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get => _data;
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set
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{
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SetAndRaise(DataProperty, ref _data, value);
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InvalidateVisual(); // 重绘控件
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}
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}
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private void InitializeComponent()
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{
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AvaloniaXamlLoader.Load(this);
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}
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protected override void OnSizeChanged(SizeChangedEventArgs e)
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{
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base.OnSizeChanged(e);
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InvalidateVisual();
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}
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public override void Render(DrawingContext context)
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{
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base.Render(context);
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if (Data.IsNullOrEmpty()) return; // 如果没有数据，则不绘制
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var width = Bounds.Width; // 控件宽度
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var height = Bounds.Height; // 控件高度
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var maxDataValue = Data.Max();
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var columnsCount = Data.Length;
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var spaceRatio = 0.2; // 柱体间空隙占柱体宽度的比例
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var columnWidth = width / (columnsCount + columnsCount * spaceRatio - spaceRatio); // 计算柱体宽度
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var spaceWidth = columnWidth * spaceRatio; // 计算柱体间空隙宽度
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for (var i = 0; i < columnsCount; i++)
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{
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var columnHeight = Data[i] / maxDataValue * height; // 根据数据值计算柱体高度
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var rect = new Rect(i * (columnWidth + spaceWidth), height - columnHeight, columnWidth, columnHeight);
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context.FillRectangle(Brushes.Blue, rect); // 绘制柱体
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}
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}
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} |