JiLinCpApp/JiLinApp/Core/Avalonia/ControlsUtil.cs

using Avalonia.Controls;
using Material.Dialog;
using Material.Dialog.Icons;
using System.Collections.Generic;
using System.Reflection;
using System.Threading.Tasks;

namespace JiLinApp.Core.Avalonia;

public static class ControlsUtil
{
    /// <summary>
    /// 查找子控件
    /// </summary>
    /// <typeparam name="T">控件类型</typeparam>
    /// <param name="parent">父控件依赖对象</param>
    /// <param name="list">子控件列表</param>
    public static void FindChild<T>(Control parent, ref List<T> list) where T : Control
    {
        if (parent == null) return;
        if (parent is Panel pParent)
        {
            foreach (Control item in pParent.Children)
            {
                if (item is Panel panel) FindChild(panel, ref list);
                else if (item is T child) list.Add(child);
            }
        }
        else if (parent is Decorator dParent)
        {
            if (dParent.Child != null) FindChild(dParent.Child, ref list);
        }
    }

    public static Window? GetWindow(Control control)
    {
        Control? temp = control;
        while (temp?.Parent != null)
        {
            if (temp.Parent is Window w) return w;
            else temp = temp.Parent is Control c ? c : null;
        }
        return null;
    }

    public static bool TryGetWindow(Control control, out Window? window)
    {
        Control? temp = control;
        window = null;
        while (temp?.Parent != null)
        {
            if (temp.Parent is Window w) { window = w; break; }
            else temp = temp.Parent is Control c ? c : null;
        }
        return window != null;
    }

    public static string GetText(this TextBox tb)
    {
        return tb.Text ?? string.Empty;
    }

    public static bool GetText(this TextBox tb, out string? text)
    {
        text = tb.Text;
        return text != null;
    }

    public static string GetText(this ComboBox cbx)
    {
        string? val = string.Empty;
        var item = cbx.SelectedItem;
        if (item == null) return val;
        if (item is Control)
        {
            if (TryGetValue(item, "Content", out object? content)) val = content?.ToString();
            else if (TryGetValue(item, "Text", out string? text)) val = text;
        }
        else val = item.ToString();
        return val ?? string.Empty;
    }

    public static bool GetText(this ComboBox cbx, out string? val)
    {
        var item = cbx.SelectedItem;
        if (item is Control)
        {
            if (TryGetValue(item, "Content", out object? content)) val = content?.ToString();
            else if (TryGetValue(item, "Text", out string? text)) val = text;
            else val = null;
        }
        else val = item?.ToString();
        return val != null;
    }

    /// <summary>
    /// 利用反射来判断对象是否包含某个属性
    /// </summary>
    /// <param name="instance">object</param>
    /// <param name="propertyName">需要判断的属性</param>
    /// <returns>是否包含</returns>
    private static bool ContainProperty(object instance, string propertyName)
    {
        if (instance == null || string.IsNullOrEmpty(propertyName)) return false;
        PropertyInfo? property = instance.GetType()?.GetProperty(propertyName);
        return property != null;
    }

    private static bool TryGetValue<T>(object instance, string propertyName, out T? val)
    {
        if (instance == null || string.IsNullOrEmpty(propertyName))
        {
            val = default;
            return false;
        }
        PropertyInfo? property = instance.GetType()?.GetProperty(propertyName);
        val = (T?)property?.GetValue(instance, null);
        return val != null;
    }

    public static async Task<DialogResult> ShowDialog(Window? window, string title = "Info", string message = "")
    {
        if (window == null) return DialogResult.NoResult;
        var dialog = DialogHelper.CreateAlertDialog(new AlertDialogBuilderParams
        {
            Borderless = true,
            Width = 300,
            DialogHeaderIcon = DialogIconKind.Info,
            ContentHeader = title,
            SupportingText = message,
            StartupLocation = WindowStartupLocation.CenterOwner,
        });
        return await dialog.ShowDialog(window);
    }

    public static async Task<DialogResult> ShowWarnDialog(Window? window, string title = "Warning", string message = "")
    {
        if (window == null) return DialogResult.NoResult;
        var dialog = DialogHelper.CreateAlertDialog(new AlertDialogBuilderParams
        {
            Borderless = true,
            Width = 300,
            DialogHeaderIcon = DialogIconKind.Warning,
            ContentHeader = title,
            SupportingText = message,
            StartupLocation = WindowStartupLocation.CenterOwner,
        });
        return await dialog.ShowDialog(window);
    }
}