Refactor hangover

Source/HangoverWinForms/Form1.Database.cs

@@ -0,0 +1,31 @@
+using HangoverBase;
+
+namespace HangoverWinForms
+{
+    public partial class Form1
+    {
+        private DatabaseTab _tab;
+
+        private void Load_databaseTab()
+        {
+            _tab = new(new(() => sqlTb.Text, sqlResultsTb.AppendText, s => sqlResultsTb.Text = s));
+
+            _tab.LoadDatabaseFile();
+            if (_tab.DbFile is null)
+            {
+                databaseFileLbl.Text = $"Database file not found";
+                return;
+            }
+
+            databaseFileLbl.Text = $"Database file: {_tab.DbFile}";
+        }
+
+        private void databaseTab_VisibleChanged(object sender, EventArgs e)
+        {
+            if (!databaseTab.Visible)
+                return;
+        }
+
+        private void sqlExecuteBtn_Click(object sender, EventArgs e) => _tab.ExecuteQuery();
+    }
+}