using DevExpress.XtraBars.Docking;
using DevExpress.XtraEditors;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Gs.DevApp.DevFrm
{
    public partial class XtraForm1 : DevExpress.XtraEditors.XtraForm
    {
        private bool isDragging = false;
        private Point dragCursorPoint;
        private Point dragPanelPoint;
        private Control dragSourceContainer;
        public XtraForm1()
        {
            InitializeComponent();
            // 初始化表单
            this.Text = "Draggable Panel Example";
            this.Size = new Size(800, 600);

            // 添加鼠标事件处理程序

            // 遍历 parentPanel 中的所有子控件
            foreach (Control control in panelControl1.Controls)
            {
                // 检查当前控件是否是一个 Panel
                if (control is PanelControl panel)
                {
                    // 在这里对子 Panel 执行操作
                    // 例如，打印出子 Panel 的名字（如果有设置 Name 属性）
                    Console.WriteLine(panel.Name ?? "无名Panel");

                    // 或者你可以调用其他方法，传递这个 panel 作为参数
                    // SomeMethod(panel);

                    control.MouseDown += new MouseEventHandler(DraggablePanel_MouseDown);
                    control.MouseMove += new MouseEventHandler(DraggablePanel_MouseMove);
                    control.MouseUp += new MouseEventHandler(DraggablePanel_MouseUp);

                }
            }


        }
        private void DraggablePanel_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                // 从事件参数 DragEventArgs 中获取被拖动的元素
                PanelControl _soucePanel = (PanelControl)sender;
                isDragging = true;
                dragCursorPoint = Cursor.Position;
                dragPanelPoint = _soucePanel.Location;
                _soucePanel.Cursor = Cursors.SizeAll;
                dragSourceContainer = _soucePanel.Parent;
            }
        }

        private void DraggablePanel_MouseMove(object sender, MouseEventArgs e)
        {
            if (isDragging)
            {
                PanelControl _soucePanel = (PanelControl)sender;
                string _mmm = dragSourceContainer.Name.ToString();
                if (_mmm == "panelControl1")
                {
                    _soucePanel.Location = new Point(
                       dragPanelPoint.X + Cursor.Position.X - dragCursorPoint.X,
                       dragPanelPoint.Y + Cursor.Position.Y - dragCursorPoint.Y);
                    Point newLocation = _soucePanel.Location;
                    Rectangle bounds = panelControl1.Bounds;
                    if (IsOutsideBounds(_soucePanel, panelControl1))
                    {
                        lbMsg.Text = _soucePanel.Location.ToString() + "-" + bounds.ToString() + ":pp" + _mmm;
                        panelControl1.Controls.Remove(_soucePanel);
                        dockPanel1.Controls.Add(_soucePanel);
                         RefreshControls();
                        _soucePanel.Location = new Point(
                           Math.Max(0, Math.Min(dockPanel1.Width - _soucePanel.Width, newLocation.X - dockPanel1.Location.X)),
                           Math.Max(0, Math.Min(dockPanel1.Height - _soucePanel.Height, newLocation.Y - dockPanel1.Location.Y)));
                    }
                    else
                    {
                        lbMsg.Text = _soucePanel.Location.ToString() + "-" + bounds.ToString() + ":pp" + _mmm;
                    }
                    return;
                }
                if (_mmm == "dockPanel1_Container")
                {
                    _soucePanel.Location = new Point(
                       dragPanelPoint.X + Cursor.Position.X - dragCursorPoint.X,
                       dragPanelPoint.Y + Cursor.Position.Y - dragCursorPoint.Y);
                    Point newLocation = _soucePanel.Location;
                    Rectangle bounds = dockPanel1.Bounds;
                    if (IsOutsideBounds(_soucePanel, dockPanel1))
                    {
                        lbMsg.Text = _soucePanel.Location.ToString() + "-" + bounds.ToString() + ":pp" + _mmm;
                        dockPanel1.Controls.Remove(_soucePanel);
                        panelControl1.Controls.Add(_soucePanel);
                        RefreshControls();
                        _soucePanel.Location = new Point(
                           Math.Max(0, Math.Min(panelControl1.Width - _soucePanel.Width, newLocation.X - panelControl1.Location.X)),
                           Math.Max(0, Math.Min(panelControl1.Height - _soucePanel.Height, newLocation.Y - panelControl1.Location.Y)));
                    }
                    else
                    {
                        lbMsg.Text = _soucePanel.Location.ToString() + "-" + bounds.ToString() + ":pp" + _mmm;
                    }
                    return;
                }
            }
        }

        public static bool IsOutsideBounds(Control childControl, Control parentControl)
        {
            int _w = childControl.Width / 2;
            int _h = childControl.Height / 2;
            // 获取父控件的客户区矩形（相对于父控件自己）
            Rectangle parentClientRect = parentControl.ClientRectangle;

            // 获取子控件相对于父控件的位置和尺寸
            Rectangle childRectRelativeToParent = childControl.Bounds;

            // 检查子控件的左边界是否超出了父控件的左边界
            if (childRectRelativeToParent.Left < parentClientRect.Left - _w)
                return true;

            // 检查子控件的右边界是否超出了父控件的右边界
            if (childRectRelativeToParent.Right > parentClientRect.Right + _w)
                return true;

            // 检查子控件的顶边界是否超出了父控件的顶边界
            if (childRectRelativeToParent.Top < parentClientRect.Top - _h)
                return true;

            // 检查子控件的底边界是否超出了父控件的底边界
            if (childRectRelativeToParent.Bottom > parentClientRect.Bottom + _h)
                return true;

            // 如果子控件的所有边界都在父控件的边界内，则返回false
            return false;
        }

        private void DraggablePanel_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isDragging = false;
                dragSourceContainer = panTuo.Parent;
            }
        }


        /// <summary>
        /// 对控件中的项进行排列
        /// </summary>
        private void RefreshControls()
        {
            int y = 0;
            foreach (PanelControl btn in dockPanel1_Container.Controls)
            {
                btn.Left = 0;
                btn.Top = y;
                y += btn.Height + 15;
            }
        }

    }

}