CRectControl.cs

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace RuntimeAdjustControlApp
{
    
    public partial class CRectControl : UserControl
    {

        private Control _current;
        private Size _square;
        private Rectangle _baseRect;
        private Rectangle[] _squareRects;
        private Rectangle[] _boundRects;
        private HitDownSquare _currHitPlace;
        private Point _p0;
        private Point _mouseP0;
        private Point _resizeMouseP0;
        private Point _resizeP0;
        private Rectangle _oriBounds;
        private List<__CRectControl> _selectedControls;
        private bool _resizeFlg = false;

        private int _minWidth = 30;
        private int _minHeight = 30;

        private class __CRectControl {

            public CRectControl Target
            {
                get;
                set;
            }

            public Point StartPos {
                get;
                set;
            }

            public Rectangle OriBounds
            {
                get;
                set;
            }

        }

        public CRectControl()
        {
            InitializeComponent();
            _square = new Size(8,8);
            _squareRects = new Rectangle[8];
            _boundRects = new Rectangle[4];
            _currHitPlace = HitDownSquare.HDS_NONE;
        }

        public CRectControl(Control ctl) : this() {