Dispenser/DispenserUI/Views/Controls/LockedView.axaml.cs

using System;
using System.Collections.Generic;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Layout;
using Avalonia.Markup.Xaml;
using Avalonia.Media;

namespace DispenserUI.Views.Controls;

public partial class LockedView : UserControl
{
    public LockedView()
    {
        InitializeComponent();

        WaterMark = this.FindControl<Grid>("WaterMark");

        this.GetObservable(IsVisibleProperty).Subscribe(val =>
        {
            if (val)
            {
                DrawWaterMark();
            }
        });
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }

    private void DrawWaterMark()
    {
        WaterMark.RenderTransformOrigin = RelativePoint.Center;
        WaterMark.RenderTransform = new RotateTransform(-45);

        var wrapPanel = new WrapPanel();
        var stackPanels = new List<StackPanel>();
        for (int i = 0; i < 100; i++)
        {
            var stackPanel = new StackPanel
            {
                Margin = new Thickness(100),
                Height = 50
            };

            // 创建提醒文字和时间文字
            var textBlock = new TextBlock
            {
                Text = "设备已锁定，请联系管理员解锁!",
                FontSize = 20,
                VerticalAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Center,
                Foreground = new SolidColorBrush(Colors.Gray),
                Opacity = 0.5,
            };
            var timeTextBlock = new TextBlock
            {
                Text = DateTime.Now.ToString("yyyy年M月d日 dddd HH:mm:ss"),
                FontSize = 12,
                VerticalAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Center,
                Foreground = new SolidColorBrush(Colors.Gray),
                Opacity = 0.5,
            };
            stackPanel.Children.Add(textBlock);
            stackPanel.Children.Add(timeTextBlock);

            stackPanels.Add(stackPanel);
        }

        wrapPanel.Children.AddRange(stackPanels);

        WaterMark.Children.Add(wrapPanel);
    }
}