using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SLZ_4
{
    public class AutoResizeForm : Form
    {
        private Dictionary<Control, Rectangle> originalRects = new Dictionary<Control, Rectangle>();
        private Size originalSize;
        public AutoResizeForm()
        {
            this.Load += (s, e) =>
            {
                originalSize = this.ClientSize;
                StoreOriginalSizes(this);
            };
            this.Resize += Form_Resize;
        }

        private void StoreOriginalSizes(Control parent)
        {
            foreach (Control ctrl in parent.Controls)
            {
                originalRects[ctrl] = new Rectangle(
                    ctrl.Left, ctrl.Top, ctrl.Width, ctrl.Height);
                if (ctrl.Controls.Count > 0)
                    StoreOriginalSizes(ctrl);
            }
        }

        private void Form_Resize(object sender, EventArgs e)
        {
            if (originalSize.Width == 0 || originalSize.Height == 0) return;

            float xRatio = (float)ClientSize.Width / originalSize.Width;
            float yRatio = (float)ClientSize.Height / originalSize.Height;


            foreach (var entry in originalRects)
            {
                Control ctrl = entry.Key;
                Rectangle rect = entry.Value;

                ctrl.Left = (int)(rect.Left * xRatio);
                ctrl.Top = (int)(rect.Top * yRatio);
                ctrl.Width = (int)(rect.Width * xRatio);
                ctrl.Height = (int)(rect.Height * yRatio);

                // 字体自适应（可选）
                if (ctrl.Font != null)
                {
                    if (xRatio > 1 && yRatio > 1)
                    {
                        ctrl.Font = new Font(ctrl.Font.FontFamily, ctrl.Font.Size * (float)1.2);
                    }
                    else
                    {
                        ctrl.Font = new Font(ctrl.Font.FontFamily, ctrl.Font.Size * (float)0.8);
                    }
                }
            }
            //originalSize.Width = ClientSize.Width;
            //originalSize.Height = ClientSize.Height;
        }
    }
}