add toyears()/fromyears()

Calctus/Model/FuncDef.cs

@@ -59,11 +59,13 @@ public FuncDef(string name, Func<EvalContext, Val[], Val> method) : this(name, 1
 
         public static readonly FuncDef now = new FuncDef("now",0, (e, a) => new RealVal(UnixTime.FromLocalTime(DateTime.Now)).FormatDateTime());
 
+        public static readonly FuncDef toyears = new FuncDef("toyears", (e, a) => a[0].Div(e, new RealVal(365.2425m * 24 * 60 * 60)).FormatReal());
         public static readonly FuncDef todays = new FuncDef("todays", (e, a) => a[0].Div(e, new RealVal(24 * 60 * 60)).FormatReal());
         public static readonly FuncDef tohours = new FuncDef("tohours", (e, a) => a[0].Div(e, new RealVal(60 * 60)).FormatReal());
         public static readonly FuncDef tominutes = new FuncDef("tominutes", (e, a) => a[0].Div(e, new RealVal(60)).FormatReal());
         public static readonly FuncDef toseconds = new FuncDef("toseconds", (e, a) => a[0].FormatReal());
 
+        public static readonly FuncDef fromyears = new FuncDef("fromyears", (e, a) => a[0].Mul(e, new RealVal(365.2425m * 24 * 60 * 60)).FormatReal());
         public static readonly FuncDef fromdays = new FuncDef("fromdays", (e, a) => a[0].Mul(e, new RealVal(24 * 60 * 60)).FormatReal());
         public static readonly FuncDef fromhours = new FuncDef("fromhours", (e, a) => a[0].Mul(e, new RealVal(60 * 60)).FormatReal());
         public static readonly FuncDef fromminutes = new FuncDef("fromminutes", (e, a) => a[0].Mul(e, new RealVal(60)).FormatReal());

Calctus/UI/ExpressionBox.cs

@@ -22,10 +22,10 @@ class ExpressionBox : Control {
         public static readonly Color IdColor = Color.FromArgb(192, 255, 128);
         public static readonly Color LiteralColor = Color.FromArgb(255, 192, 64);
         public static readonly Color[] ParenthesisColors = new Color[] {
-            Color.FromArgb(64, 192 , 255),
-            Color.FromArgb(128, 64 , 255),
-            Color.FromArgb(255, 64 , 128),
-            Color.FromArgb(255, 192 , 64),
+            Color.FromArgb(64, 192, 255),
+            Color.FromArgb(192, 128, 255),
+            Color.FromArgb(255, 128, 192),
+            Color.FromArgb(255, 192, 64),
         };
         public static readonly Color SelectionColor = Color.FromArgb(128, 0, 128, 255);