using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;
using CommonLib;

namespace Lskj.Common
{
    public class GridDragTree
    {
        private string SQLDT1;
        private string filedKey;
        private DataRow sdkModel;

        public GridDragTree(Form thisForm, GridControl grid, TreeView target, DragEventHandler Complete, DataRow sdkModel, string SQLDT1, string filedKey)
        {
            opForm = thisForm;
            currentGridView = (GridView)grid.FocusedView;
            dragComplete = Complete;
            grid.FocusedView.MouseDown += new MouseEventHandler(gridMouseDown);
            grid.FocusedView.MouseMove += new MouseEventHandler(gridMouseMove);
            target.HideSelection = false;
            target.DragOver += new DragEventHandler(objDragOver);
            target.DragDrop += new DragEventHandler(objDragDrop);
            target.AllowDrop = true;
            this.sdkModel = sdkModel;
            this.SQLDT1 = SQLDT1;
            this.filedKey = filedKey;
        }

        private GridHitInfo downHitInfo = null;
        private GridView currentGridView = null;
        Form opForm = null;
        DragEventHandler dragComplete = null;

        private void gridMouseDown(object sender, MouseEventArgs e)
        {
            GridView view = sender as GridView;
            downHitInfo = null;
            GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));
            if (Control.ModifierKeys != Keys.None) return;
            if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
                downHitInfo = hitInfo;
        }

        private void gridMouseMove(object sender, MouseEventArgs e)
        {
            GridView view = sender as GridView;
            if (e.Button == MouseButtons.Left && downHitInfo != null)
            {
                Size dragSize = SystemInformation.DragSize;
                Rectangle dragRect = new Rectangle(new Point(downHitInfo.HitPoint.X - dragSize.Width / 2,
                    downHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);

                if (!dragRect.Contains(new Point(e.X, e.Y)))
                {
                    object row = view.GetRow(downHitInfo.RowHandle);
                    view.GridControl.DoDragDrop(row, DragDropEffects.Move);
                    downHitInfo = null;
                    DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
                }
            }
        }
        private void objDragOver(object sender, DragEventArgs e)
        {
            (sender as TreeView).Select();
            e.Effect = DragDropEffects.Move;
            TreeNode tn = null;
            Point pt = new Point();
            pt.X = e.X;
            pt.Y = e.Y;
            tn = (sender as TreeView).GetNodeAt((sender as TreeView).PointToClient(pt));
            if (tn == null)
                return;
            (sender as TreeView).SelectedNode = tn;
            if (tn.GetNodeCount(true) > 0)
                tn.Expand();
        }

        private void objDragDrop(object sender, DragEventArgs e)
        {
            //这里处理拖放后的操作，比如更改选中数据属性
            TreeNode tn = null;
            Point pt = new Point();
            pt.X = e.X;
            pt.Y = e.Y;
            tn = (sender as TreeView).GetNodeAt((sender as TreeView).PointToClient(pt));
            if (tn == null)
                return;
            if (tn.GetNodeCount(true) > 0)
            {
                MessageBox.Show("【" + tn.Text + "】不是最后一级不能拖拽");
                return;
            }
            if (MessageBox.Show("确定将所选档案信息转移到[" + tn.Text + "]", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
            {
                return;
            }
            //选中行操作，修改或者删除
            int[] rowid = currentGridView.GetSelectedRows();
            foreach (int rid in rowid)
            {
                DataRow dr = currentGridView.GetDataRow(rid);
                SqlHelper.ExecuteNonQuery("update " + SQLDT1 + " set " + sdkModel["fieldname"] + "='" + tn.Name + "' where " + filedKey + "='" + dr[filedKey] + "'");
            }
            dragComplete(sender, e);
        }
    }
    public class GridDrag2Grid
    {
        private GridHitInfo downHitInfo;
        GridView sourceView = null;
        GridView targetView = null;
        public callBack internal_func { get; set; }
        private bool dragIng = false;
        public delegate void callBack(object sender);

        public GridDrag2Grid(GridControl source, GridControl target, callBack callFunc)
        {
            internal_func = callFunc;
            sourceView = (source.FocusedView as GridView);
            targetView = (target.FocusedView as GridView);
            (source.FocusedView as GridView).OptionsSelection.MultiSelect = true;
            source.FocusedView.MouseDown += new MouseEventHandler(gridViewMouseDown);
            source.FocusedView.MouseMove += new MouseEventHandler(gridViewMouseMove);
            source.FocusedView.MouseUp += new MouseEventHandler(gridViewMouseUp);
            target.AllowDrop = true;
            target.DragEnter += new DragEventHandler(gridDragEnter);
            target.DragDrop += new DragEventHandler(gridDragDrop);
        }
        private void gridMouseDown(object sender, MouseEventArgs e)
        {
            downHitInfo = sourceView.CalcHitInfo(new Point(e.X, e.Y));
            dragIng = true;
        }


        private void gridMouseMove(object sender, MouseEventArgs e)
        {
            if (downHitInfo == null) return;
            if (e.Button != MouseButtons.Left) return;
            Rectangle dragRect = new Rectangle(new Point(
                downHitInfo.HitPoint.X - SystemInformation.DragSize.Width / 2,
                downHitInfo.HitPoint.Y - SystemInformation.DragSize.Height / 2), SystemInformation.DragSize);
            if (!dragRect.Contains(new Point(e.X, e.Y)))
            {
                DataRow data = sourceView.GetDataRow(downHitInfo.RowHandle);
                int[] rows = sourceView.GetSelectedRows();
                List<DataRow> row = new List<DataRow>();
                for (int i = 0; i < rows.Length; i++)
                    row.Add(sourceView.GetDataRow((int)rows[i]));
                (sender as GridControl).DoDragDrop(row, DragDropEffects.Move);
            }
        }
        private void gridViewMouseDown(object sender, MouseEventArgs e)
        {
            targetView.Tag = "1";
            dragIng = true;
            GridView view = sender as GridView;
            downHitInfo = null;
            GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));
            if (Control.ModifierKeys != Keys.None) return;
            if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
                downHitInfo = hitInfo;
        }

        private void gridViewMouseUp(object sender, MouseEventArgs e)
        {
            dragIng = false;
            targetView.Tag = "0";
        }

        private void gridViewMouseMove(object sender, MouseEventArgs e)
        {
            GridView view = sender as GridView;
            if (e.Button == MouseButtons.Left && downHitInfo != null)
            {
                Size dragSize = SystemInformation.DragSize;
                Rectangle dragRect = new Rectangle(new Point(downHitInfo.HitPoint.X - dragSize.Width / 2,
                    downHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);

                if (!dragRect.Contains(new Point(e.X, e.Y)))
                {
                    object row = view.GetRow(downHitInfo.RowHandle);
                    view.GridControl.DoDragDrop(row, DragDropEffects.Move);
                    downHitInfo = null;
                    DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
                }
            }
        }

        private void gridDragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
            targetView.Tag = "1";
        }
        private void gridDragDrop(object sender, DragEventArgs e)
        {
            if (internal_func != null)
            {
                if (dragIng == true)
                {
                    internal_func(sender);
                    dragIng = false;
                }
                return;
            }

            GridControl grid = sender as GridControl;
            DataTable table = grid.DataSource as DataTable;
            List<DataRow> row = e.Data.GetData(typeof(List<DataRow>)) as List<DataRow>;
            if (row != null && table != null)
            {
                if (row.Count > 0)
                {
                    for (int i = 0; i < row.Count; i++)
                    {
                        table.ImportRow(row[i]);
                        row[i].Delete();  // 把原有的数据行删除。
                    }
                }
            }
            dragIng = false;

            targetView.Tag = "0";
        }
    }
    
    public class GridDrag2GridUpdate
    {
        private GridHitInfo downHitInfo;
        GridView sourceView = null;
        GridView targetView = null;
        public callBack internal_func { get; set; }
        private bool dragIng = false;
        public delegate void callBack(object sender);

        public GridDrag2GridUpdate(GridControl source, GridControl target, callBack callFunc)
        {
            internal_func = callFunc;
            sourceView = (source.FocusedView as GridView);
            targetView = (target.FocusedView as GridView);
            source.FocusedView.MouseDown += new MouseEventHandler(gridViewMouseDown);
            source.FocusedView.MouseMove += new MouseEventHandler(gridViewMouseMove);
            source.FocusedView.MouseUp += new MouseEventHandler(gridViewMouseUp);
            target.AllowDrop = true;
            target.DragOver += new DragEventHandler(target_DragOver);
            target.DragEnter += new DragEventHandler(gridDragEnter);
            target.DragDrop += new DragEventHandler(gridDragDrop);
        }
        private void gridMouseDown(object sender, MouseEventArgs e)
        {
            downHitInfo = sourceView.CalcHitInfo(new Point(e.X, e.Y));
            dragIng = true;
            targetView.Tag = "1";
        }


        private void gridMouseMove(object sender, MouseEventArgs e)
        {
            if (downHitInfo == null) return;
            if (e.Button != MouseButtons.Left) return;
            Rectangle dragRect = new Rectangle(new Point(
                downHitInfo.HitPoint.X - SystemInformation.DragSize.Width / 2,
                downHitInfo.HitPoint.Y - SystemInformation.DragSize.Height / 2), SystemInformation.DragSize);
            if (!dragRect.Contains(new Point(e.X, e.Y)))
            {
                DataRow data = sourceView.GetDataRow(downHitInfo.RowHandle);
                int[] rows = sourceView.GetSelectedRows();
                List<DataRow> row = new List<DataRow>();
                for (int i = 0; i < rows.Length; i++)
                    row.Add(sourceView.GetDataRow((int)rows[i]));
                (sender as GridControl).DoDragDrop(row, DragDropEffects.Move);
            }
        }
        private void gridViewMouseDown(object sender, MouseEventArgs e)
        {
            targetView.Tag = "1";
            dragIng = true;
            GridView view = sender as GridView;
            downHitInfo = null;
            GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));
            if (Control.ModifierKeys != Keys.None) return;
            if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
                downHitInfo = hitInfo;
        }

        private void gridViewMouseMove(object sender, MouseEventArgs e)
        {
            GridView view = sender as GridView;
            if (e.Button == MouseButtons.Left && downHitInfo != null)
            {
                Size dragSize = SystemInformation.DragSize;
                Rectangle dragRect = new Rectangle(new Point(downHitInfo.HitPoint.X - dragSize.Width / 2,
                    downHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);

                if (!dragRect.Contains(new Point(e.X, e.Y)))
                {
                    object row = view.GetRow(downHitInfo.RowHandle);
                    view.GridControl.DoDragDrop(row, DragDropEffects.Move);
                    downHitInfo = null;
                    DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
                }
            }
        }

        private void gridViewMouseUp(object sender, MouseEventArgs e)
        {
            dragIng = false;
            targetView.Tag = "0";
        }

        private void target_DragOver(object sender, DragEventArgs e)
        {
            GridControl targetControl = (sender as GridControl);
            GridView targetGrid = targetControl.FocusedView as GridView;
            Point gcPoint = targetControl.PointToScreen((sender as GridControl).Location);
            Point pt = new Point(e.X - gcPoint.X, e.Y - gcPoint.Y);
            downHitInfo = targetGrid.CalcHitInfo(pt);
            if (downHitInfo == null || downHitInfo.RowHandle < 0) return;
            targetGrid.SelectRow(downHitInfo.RowHandle);
            targetGrid.FocusedRowHandle = downHitInfo.RowHandle;
        }
        private void gridDragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
            targetView.Tag = "1";
        }
        private void gridDragDrop(object sender, DragEventArgs e)
        {
            if (internal_func != null)
            {
                if (dragIng == true)
                {
                    internal_func(sender);
                    dragIng = false;
                }
                targetView.Tag = "0";
                return;
            }


            GridControl grid = sender as GridControl;
            DataTable table = grid.DataSource as DataTable;
            List<DataRow> row = e.Data.GetData(typeof(List<DataRow>)) as List<DataRow>;
            if (row != null && table != null)
            {
                if (row.Count > 0)
                {
                    for (int i = 0; i < row.Count; i++)
                    {
                        table.ImportRow(row[i]);
                        row[i].Delete();  // 把原有的数据行删除。
                    }
                }
            }
            targetView.Tag = "0";
        }
    }
}