From 2eccc2649f8a583df2d9e33f479af66d79d34eef Mon Sep 17 00:00:00 2001
From: Alex Zaytsev <hazzik@gmail.com>
Date: Tue, 27 Aug 2024 12:10:01 +1000
Subject: [PATCH] Add ability to reorder rows in streamline input plugin

---
 .../FlowInputDlg.Designer.cs                  |  8 +++-
 .../plugins/GKFlowInputPlugin/FlowInputDlg.cs | 48 +++++++++++++++++++
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/projects/plugins/GKFlowInputPlugin/FlowInputDlg.Designer.cs b/projects/plugins/GKFlowInputPlugin/FlowInputDlg.Designer.cs
index 1b9f81563..571238ac6 100644
--- a/projects/plugins/GKFlowInputPlugin/FlowInputDlg.Designer.cs
+++ b/projects/plugins/GKFlowInputPlugin/FlowInputDlg.Designer.cs
@@ -384,7 +384,8 @@ private void InitializeComponent()
             this.sgData.TabIndex = 4;
             // 
             // dataGridView1
-            // 
+            //
+            this.dataGridView1.AllowDrop = true;
             this.dataGridView1.AllowUserToResizeRows = false;
             this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             this.dataGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
@@ -393,7 +394,10 @@ private void InitializeComponent()
             this.dataGridView1.Name = "dataGridView1";
             this.dataGridView1.Size = new System.Drawing.Size(609, 177);
             this.dataGridView1.TabIndex = 0;
-            // 
+            this.dataGridView1.DragDrop += new System.Windows.Forms.DragEventHandler(this.dataGridView_DragDrop);
+            this.dataGridView1.DragOver += new System.Windows.Forms.DragEventHandler(this.dataGridView_DragOver);
+            this.dataGridView1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.dataGridView_MouseMove);
+            //
             // cbPersonLink
             // 
             this.cbPersonLink.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
diff --git a/projects/plugins/GKFlowInputPlugin/FlowInputDlg.cs b/projects/plugins/GKFlowInputPlugin/FlowInputDlg.cs
index 853bad253..eec714fde 100644
--- a/projects/plugins/GKFlowInputPlugin/FlowInputDlg.cs
+++ b/projects/plugins/GKFlowInputPlugin/FlowInputDlg.cs
@@ -19,6 +19,7 @@
  */
 
 using System;
+using System.Drawing;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using BSLib;
@@ -313,6 +314,53 @@ private void rbX_CheckedChanged(object sender, EventArgs e)
             gbMetrics.Enabled = (rbSK_Met.Checked);
         }
 
+        private void dataGridView_MouseMove(object sender, MouseEventArgs e)
+        {
+            if ((e.Button & MouseButtons.Left) != MouseButtons.Left || dataGridView1.SelectedRows.Count == 0) {
+                return;
+            }
+
+            var rowToMove = dataGridView1.SelectedRows[0];
+            if (rowToMove.IsNewRow) {
+                return;
+            }
+
+            dataGridView1.DoDragDrop(rowToMove, DragDropEffects.Move);
+        }
+
+        private void dataGridView_DragOver(object sender, DragEventArgs e)
+        {
+            e.Effect = DragDropEffects.Move;
+        }
+
+        private void dataGridView_DragDrop(object sender, DragEventArgs e)
+        {
+            if (e.Effect != DragDropEffects.Move) {
+                return;
+            }
+
+            var clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y));
+            var hit = dataGridView1.HitTest(clientPoint.X, clientPoint.Y);
+            var rowIndexOfItemUnderMouseToDrop =
+                hit.Type != DataGridViewHitTestType.TopLeftHeader && hit.Type != DataGridViewHitTestType.ColumnHeader
+                    ? hit.RowIndex
+                    : 0;
+
+            var rowToMove = e.Data.GetData(typeof(DataGridViewRow)) as DataGridViewRow;
+            if (rowToMove == null) {
+                return;
+            }
+
+            dataGridView1.Rows.Remove(rowToMove);
+            if (rowIndexOfItemUnderMouseToDrop < dataGridView1.Rows.Count && rowIndexOfItemUnderMouseToDrop >= 0) {
+                dataGridView1.Rows.Insert(rowIndexOfItemUnderMouseToDrop, rowToMove);
+            } else {
+                dataGridView1.Rows.Add(rowToMove);
+            }
+
+            dataGridView1.CurrentCell = rowToMove.Cells[0];
+        }
+
         #endregion
     }
 }