99 lines
3.7 KiB
C#
99 lines
3.7 KiB
C#
using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Data;
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namespace Cowain.Base.Helpers;
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public class GridDefinitionsHelper
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{
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// 定义Rows附加属性
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public static readonly AttachedProperty<int> RowsProperty =
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AvaloniaProperty.RegisterAttached<GridDefinitionsHelper, Grid, int>("Rows", 0);
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// 定义Columns附加属性
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public static readonly AttachedProperty<int> ColumnsProperty =
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AvaloniaProperty.RegisterAttached<GridDefinitionsHelper, Grid, int>("Columns", 0);
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// 定义RowHeight附加属性
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public static readonly AttachedProperty<string> RowHeightProperty =
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AvaloniaProperty.RegisterAttached<GridDefinitionsHelper, Grid, string>("RowHeight", "Auto");
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// 定义ColumnWidth附加属性
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public static readonly AttachedProperty<string> ColumnWidthProperty =
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AvaloniaProperty.RegisterAttached<GridDefinitionsHelper, Grid, string>("ColumnWidth", "Auto");
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// Getter和Setter方法
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public static int GetRows(AvaloniaObject element) => element.GetValue(RowsProperty);
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public static void SetRows(AvaloniaObject element, int value) => element.SetValue(RowsProperty, value);
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public static int GetColumns(AvaloniaObject element) => element.GetValue(ColumnsProperty);
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public static void SetColumns(AvaloniaObject element, int value) => element.SetValue(ColumnsProperty, value);
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public static string GetRowHeight(AvaloniaObject element) => element.GetValue(RowHeightProperty);
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public static void SetRowHeight(AvaloniaObject element, string value) => element.SetValue(RowHeightProperty, value);
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public static string GetColumnWidth(AvaloniaObject element) => element.GetValue(ColumnWidthProperty);
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public static void SetColumnWidth(AvaloniaObject element, string value) => element.SetValue(ColumnWidthProperty, value);
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static GridDefinitionsHelper()
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{
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// 监听Rows属性变化
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RowsProperty.Changed.AddClassHandler<Grid>((grid, e) => UpdateGridDefinitions(grid));
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// 监听Columns属性变化
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ColumnsProperty.Changed.AddClassHandler<Grid>((grid, e) => UpdateGridDefinitions(grid));
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// 监听RowHeight属性变化
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RowHeightProperty.Changed.AddClassHandler<Grid>((grid, e) => UpdateGridDefinitions(grid));
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// 监听ColumnWidth属性变化
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ColumnWidthProperty.Changed.AddClassHandler<Grid>((grid, e) => UpdateGridDefinitions(grid));
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}
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private static void UpdateGridDefinitions(Grid grid)
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{
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int rows = GetRows(grid);
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int columns = GetColumns(grid);
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string rowHeight = GetRowHeight(grid);
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string columnWidth = GetColumnWidth(grid);
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// 更新行定义
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grid.RowDefinitions.Clear();
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var height = ParseDimension(rowHeight);
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for (int i = 0; i < rows; i++)
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{
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grid.RowDefinitions.Add(new RowDefinition(height));
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}
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// 更新列定义
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grid.ColumnDefinitions.Clear();
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var width = ParseDimension(columnWidth);
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for (int i = 0; i < columns; i++)
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{
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grid.ColumnDefinitions.Add(new ColumnDefinition(width));
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}
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}
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private static GridLength ParseDimension(string value)
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{
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if (string.IsNullOrEmpty(value))
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return GridLength.Auto;
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value = value.Trim();
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if (value.EndsWith("*"))
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{
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if (value.Length == 1)
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return new GridLength(1, GridUnitType.Star);
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if (double.TryParse(value.Substring(0, value.Length - 1), out double starValue))
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return new GridLength(starValue, GridUnitType.Star);
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}
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else if (double.TryParse(value, out double pixelValue))
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{
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return new GridLength(pixelValue, GridUnitType.Pixel);
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}
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return GridLength.Auto;
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}
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}
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