Added, action argument inputs: added "<" and ">" prefixes. These decrement/increment given value by selected map element number.

Changed, action argument inputs: "+++" and "---" prefixes now do the same thing as they do in other numeric controls (e.g. add/subtract given value multiplied by selected map element number to/from initial value).
Changed, action argument inputs: changed value colors, added tooltips.

Source/Core/Controls/ArgumentBox.Designer.cs

@@ -28,18 +28,24 @@ namespace CodeImp.DoomBuilder.Controls
 		/// </summary>
 		private void InitializeComponent()
 		{
+			this.components = new System.ComponentModel.Container();
 			this.combobox = new System.Windows.Forms.ComboBox();
 			this.button = new System.Windows.Forms.Button();
 			this.scrollbuttons = new System.Windows.Forms.VScrollBar();
+			this.tooltip = new System.Windows.Forms.ToolTip(this.components);
 			this.SuspendLayout();
 			// 
 			// combobox
 			// 
 			this.combobox.DropDownWidth = 130;
+			this.combobox.ForeColor = System.Drawing.SystemColors.HotTrack;
 			this.combobox.Location = new System.Drawing.Point(0, 2);
 			this.combobox.Name = "combobox";
 			this.combobox.Size = new System.Drawing.Size(149, 21);
 			this.combobox.TabIndex = 0;
+			this.tooltip.SetToolTip(this.combobox, "Use ++ or -- prefixes to change by given value.\r\nUse +++ or --- prefixes to incre" +
+					"mentally change by given value.\r\nUse < or > prefixes to decrementally or increme" +
+					"ntally set given value.");
 			this.combobox.Validating += new System.ComponentModel.CancelEventHandler(this.combobox_Validating);
 			this.combobox.TextChanged += new System.EventHandler(this.combobox_TextChanged);
 			// 
@@ -86,5 +92,6 @@ namespace CodeImp.DoomBuilder.Controls
 		private System.Windows.Forms.ComboBox combobox;
 		private System.Windows.Forms.Button button;
 		private System.Windows.Forms.VScrollBar scrollbuttons;
+		private System.Windows.Forms.ToolTip tooltip;
 	}
 }

Source/Core/Controls/ArgumentBox.cs

@@ -89,7 +89,7 @@ namespace CodeImp.DoomBuilder.Controls
 		private void combobox_Validating(object sender, CancelEventArgs e)
 		{
 			string str = combobox.Text.Trim().ToLowerInvariant();
-			str = str.TrimStart('+', '-');
+			str = str.TrimStart('+', '-', '<', '>');
 
 			// Anything in the box?
 			if(combobox.Text.Trim().Length > 0)
@@ -266,20 +266,22 @@ namespace CodeImp.DoomBuilder.Controls
 		// This checks if the number is relative
 		public bool CheckIsRelative()
 		{
-			// Prefixed with +++, ---, ++ or --?
+			// Prefixed with +++, ---, <, >, ++ or --?
 			string str = combobox.Text.Trim();
-			return (str.StartsWith("+++") || str.StartsWith("---") || str.StartsWith("++") || str.StartsWith("--"));
+			return (str.StartsWith("+++") || str.StartsWith("---") 
+				|| str.StartsWith("++") || str.StartsWith("--") 
+				|| str.StartsWith("<") || str.StartsWith(">"));
 		}
 		
 		// This returns the selected value
 		public int GetResult(int original) { return GetResult(original, 0); } //mxd
-		public int GetResult(int original, int offset)
+		public int GetResult(int original, int step)
 		{
 			int result;
 			
 			// Strip prefixes
 			string str = combobox.Text.Trim().ToLowerInvariant();
-			string numstr = str.TrimStart('+', '-'); //mxd
+			string numstr = str.TrimStart('+', '-', '<', '>'); //mxd
 
 			// Anything in the box?
 			if(numstr.Length > 0)
@@ -290,7 +292,7 @@ namespace CodeImp.DoomBuilder.Controls
 					// Add offset to number
 					int num;
 					if(!int.TryParse(numstr, out num)) num = 0;
-					result = num + offset;
+					result = original + num * step;
 				}
 				//mxd. Prefixed with ---?
 				else if(str.StartsWith("---"))
@@ -298,7 +300,23 @@ namespace CodeImp.DoomBuilder.Controls
 					// Subtract offset from number
 					int num;
 					if(!int.TryParse(numstr, out num)) num = 0;
-					result = num - offset;
+					result = original - num * step;
+				}
+				// mxd. Prefixed with <?
+				else if(str.StartsWith("<"))
+				{
+					// Incremental decrease
+					int num;
+					if(!int.TryParse(numstr, out num)) num = 0;
+					result = num - step;
+				}
+				// mxd. Prefixed with >?
+				else if(str.StartsWith(">"))
+				{
+					// Incremental increase
+					int num;
+					if(!int.TryParse(numstr, out num)) num = 0;
+					result = num + step;
 				}
 				// Prefixed with ++?
 				else if(str.StartsWith("++"))

Source/Core/Controls/ArgumentBox.resx

@@ -120,6 +120,9 @@
   <metadata name="combobox.Locked" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>True</value>
   </metadata>
+  <metadata name="tooltip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
   <metadata name="button.Locked" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>True</value>
   </metadata>

Source/Core/Controls/ArgumentsControl.cs

@@ -133,7 +133,7 @@ namespace CodeImp.DoomBuilder.Controls
 
 		#region ================== Apply
 
-		public void Apply(Linedef l, int offset)
+		public void Apply(Linedef l, int step)
 		{
 			//mxd. Script name/number handling
 			// We can't rely on control visibility here, because all controlls will be invisible if ArgumentsControl is invisible
@@ -161,7 +161,7 @@ namespace CodeImp.DoomBuilder.Controls
 
 				// Apply classic arg
 				case ArgZeroMode.DEFAULT:
-					l.Args[0] = arg0.GetResult(l.Args[0], offset);
+					l.Args[0] = arg0.GetResult(l.Args[0], step);
 					if(l.Fields.ContainsKey("arg0str")) l.Fields.Remove("arg0str");
 					break;
 
@@ -169,13 +169,13 @@ namespace CodeImp.DoomBuilder.Controls
 			}
 
 			// Apply the rest of args
-			l.Args[1] = arg1.GetResult(l.Args[1], offset);
+			l.Args[1] = arg1.GetResult(l.Args[1], step);
-			l.Args[2] = arg2.GetResult(l.Args[2], offset);
+			l.Args[2] = arg2.GetResult(l.Args[2], step);
-			l.Args[3] = arg3.GetResult(l.Args[3], offset);
+			l.Args[3] = arg3.GetResult(l.Args[3], step);
-			l.Args[4] = arg4.GetResult(l.Args[4], offset);
+			l.Args[4] = arg4.GetResult(l.Args[4], step);
 		}
 
-		public void Apply(Thing t, int offset)
+		public void Apply(Thing t, int step)
 		{
 			//mxd. Script name/number handling
 			// We can't rely on control visibility here, because all controlls will be invisible if ArgumentsControl is invisible
@@ -203,7 +203,7 @@ namespace CodeImp.DoomBuilder.Controls
 
 				// Apply classic arg
 				case ArgZeroMode.DEFAULT:
-					t.Args[0] = arg0.GetResult(t.Args[0], offset);
+					t.Args[0] = arg0.GetResult(t.Args[0], step);
 					if(t.Fields.ContainsKey("arg0str")) t.Fields.Remove("arg0str");
 					break;
 
@@ -211,10 +211,10 @@ namespace CodeImp.DoomBuilder.Controls
 			}
 
 			// Apply the rest of args
-			t.Args[1] = arg1.GetResult(t.Args[1], offset);
+			t.Args[1] = arg1.GetResult(t.Args[1], step);
-			t.Args[2] = arg2.GetResult(t.Args[2], offset);
+			t.Args[2] = arg2.GetResult(t.Args[2], step);
-			t.Args[3] = arg3.GetResult(t.Args[3], offset);
+			t.Args[3] = arg3.GetResult(t.Args[3], step);
-			t.Args[4] = arg4.GetResult(t.Args[4], offset);
+			t.Args[4] = arg4.GetResult(t.Args[4], step);
 		}
 
 		#endregion

Source/Core/Controls/NumericTextbox.cs

@@ -228,7 +228,7 @@ namespace CodeImp.DoomBuilder.Controls
 			string textpart = this.Text;
 			
 			// Strip prefixes
-			textpart = textpart.Replace("+", "").Replace("-", "").Replace("*", "").Replace("/", ""); //mxd
+			textpart = textpart.TrimStart('+', '-', '*', '/'); //mxd
 			
 			// Any numbers left?
 			if(textpart.Length > 0)