将TextBox鼠标滚轮缩放字体写为扩展方法

ContextMenuManager/BulePointLilac.Methods/TextBoxExtension.cs

@@ -0,0 +1,21 @@
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace BulePointLilac.Methods
+{
+    public static class TextBoxExtension
+    {
+        /// <summary>TextBox仿RichTextBox按住Ctrl加鼠标滚轮放缩字体</summary>
+        public static void CanResizeFont(this TextBox box)
+        {
+            box.MouseWheel += (sender, e) =>
+            {
+                if(Control.ModifierKeys != Keys.Control) return;
+                float size = box.Font.Size;
+                if(size < 8F && e.Delta < 0) return;
+                if(size > 40F && e.Delta > 0) return;
+                box.Font = new Font(box.Font.FontFamily, size + (e.Delta > 0 ? 1 : -1));
+            };
+        }
+    }
+}