v1.2

FSI.BT.Tools/SystemTrayMenu/Helpers/DgvMouseRow.cs

@@ -0,0 +1,106 @@
+// <copyright file="DgvMouseRow.cs" company="PlaceholderCompany">
+// Copyright (c) PlaceholderCompany. All rights reserved.
+// </copyright>
+
+namespace FSI.BT.Tools.SystemTrayMenu.Helper
+{
+    using System;
+    using System.Windows.Forms;
+
+    public class DgvMouseRow : IDisposable
+    {
+        private readonly Timer timerRaiseRowMouseLeave = new();
+        private DataGridView dgv;
+        private DataGridViewCellEventArgs eventArgs;
+
+        internal DgvMouseRow()
+        {
+            timerRaiseRowMouseLeave.Interval = 200;
+            timerRaiseRowMouseLeave.Tick += TimerRaiseRowMouseLeave_Tick;
+        }
+
+        ~DgvMouseRow() // the finalizer
+        {
+            Dispose(false);
+        }
+
+        internal event Action<object, DataGridViewCellEventArgs> RowMouseEnter;
+
+        internal event Action<object, DataGridViewCellEventArgs> RowMouseLeave;
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        internal void CellMouseEnter(object sender, DataGridViewCellEventArgs newEventArgs)
+        {
+            DataGridView newDgv = (DataGridView)sender;
+
+            if (dgv != newDgv || newEventArgs.RowIndex != eventArgs.RowIndex)
+            {
+                if (timerRaiseRowMouseLeave.Enabled)
+                {
+                    timerRaiseRowMouseLeave.Stop();
+                    TriggerRowMouseLeave();
+                }
+
+                TriggerRowMouseEnter(newDgv, newEventArgs);
+            }
+            else
+            {
+                timerRaiseRowMouseLeave.Stop();
+            }
+
+            dgv = newDgv;
+            eventArgs = newEventArgs;
+        }
+
+        internal void CellMouseLeave(object sender, DataGridViewCellEventArgs e)
+        {
+            timerRaiseRowMouseLeave.Start();
+        }
+
+        internal void MouseLeave(object sender, EventArgs e)
+        {
+            if (timerRaiseRowMouseLeave.Enabled)
+            {
+                timerRaiseRowMouseLeave.Stop();
+                TriggerRowMouseLeave();
+            }
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                timerRaiseRowMouseLeave.Tick -= TimerRaiseRowMouseLeave_Tick;
+                timerRaiseRowMouseLeave.Dispose();
+                dgv = null;
+            }
+        }
+
+        private void TimerRaiseRowMouseLeave_Tick(object sender, EventArgs e)
+        {
+            timerRaiseRowMouseLeave.Stop();
+            TriggerRowMouseLeave();
+        }
+
+        private void TriggerRowMouseLeave()
+        {
+            if (dgv != null)
+            {
+                RowMouseLeave?.Invoke(dgv, eventArgs);
+            }
+
+            dgv = null;
+            eventArgs = null;
+        }
+
+        private void TriggerRowMouseEnter(DataGridView dgv, DataGridViewCellEventArgs e)
+        {
+            RowMouseEnter?.Invoke(dgv, e);
+        }
+    }
+}