The DrawPreview now draws

Advanced Software Engineering/Advanced Software Engineering/DrawPreview.Designer.cs

@@ -45,6 +45,7 @@
             this.button1.TabIndex = 0;
             this.button1.Text = "Submit";
             this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.SubmitCommand);
             // 
             // textBox1
             // 

Advanced Software Engineering/Advanced Software Engineering/DrawPreview.cs

@@ -12,6 +12,10 @@ namespace Advanced_Software_Engineering
 {
     public partial class Draw_Preview : Form
     {
+
+        Graphics graphics;
+        Commander commander;
+
         /// <summary>
         /// The draw preview window.
         /// </summary>
@@ -22,6 +26,8 @@ namespace Advanced_Software_Engineering
         {
             InitializeComponent();
             SettingsAndHelperFunctions.NumberOfWindows++;
+            graphics = panel1.CreateGraphics();
+            commander = new Commander(graphics);
         }
 
         private void DrawPreview_FormClosed(object sender, FormClosedEventArgs e)
@@ -31,9 +37,16 @@ namespace Advanced_Software_Engineering
 
         private void DrawPreviewPane_Paint(object sender, PaintEventArgs e)
         {
-            Graphics g = e.Graphics;
+            commander.DrawAllCommands();
-            Pen myBlackPen = new Pen(Color.Black, 5);
+        }
 
+        private void SubmitCommand(object sender, EventArgs e)
+        {
+            commander.ProcessCommands(textBox1.Text);
+            textBox1.Text = "";
+
+            //Makes sure that the panel updates
+            panel1.Invalidate();
         }
     }
 }

Advanced Software Engineering/Advanced Software Engineering/SettingsAndHelperFunctions.cs

@@ -1,4 +1,6 @@
-using System.Security.Policy;
+using System;
+using System.Collections.Generic;
+using System.Security.Policy;
 using System.Windows.Forms;
 
 namespace Advanced_Software_Engineering
@@ -24,8 +26,99 @@ namespace Advanced_Software_Engineering
                 System.Console.WriteLine("Showing MainMenu");
                 Program.MainMenu.Show();
             }
-                
+
+        }
+        /// <summary>
+        /// This function removes spaces from the start and the end of the text. This should be unit tested.
+        /// </summary>
+        /// <param name="text">Simply any string of any size</param>
+        /// <returns>A string without spaces at the begining or the end</returns>
+        /// <example>
+        /// For example
+        /// <code>
+        /// string a = "     a simple sentence surrounded by spaces                ";
+        /// string b = StripSpaces(a);
+        /// Console.WriteLine(b); // => "a simple sentence surrounded by spaces";
+        /// </code>
+        /// </example>
+        /// <example>
+        /// The code won't remove internal double spaces:
+        /// <code>
+        /// string a = "     a    simple    sentence     surrounded    by    spaces                ";
+        /// string b = StripSpaces(a);
+        /// Console.WriteLine(b); // => "a    simple    sentence     surrounded    by    spaces";
+        /// </code>
+        /// </example>
+        public static string Strip(string text)
+        {
+            //Console.WriteLine("Stripping: '" + text + "'");
+            int start;
+
+            for (start = 0; start < text.Length; start++)
+            {
+                char character = text[start];
+                if (character != " "[0]) break;
+            }
+
+            int end;
+
+            for (end = text.Length - 1; end >= 0; end--)
+            {
+                char character = text[end];
+                if (character != " "[0]) break;
+            }
+
+            string result = text.Substring(start, end - start + 1);
+
+            //Console.WriteLine("Started at: " + start);
+            //Console.WriteLine("Ended at:   " + end);
+            //Console.WriteLine("Result:     " + result);
+
+            return result;
+
         }
 
+        public static int ConvertToInt(string text)
+        {
+            text = Strip(text);
+            return int.Parse(text);
+        }
+
+        public static List<string> StripStringArray(string[] array)
+        {
+            List<string> newStringList = new List<string>();
+
+            foreach (string arrayElement in array)
+            {
+                string strippedElement = Strip(arrayElement);
+                if (strippedElement.Length == 0) continue;
+                else newStringList.Add(strippedElement);
+            }
+
+            return newStringList;
+        }
+
+        public static Dictionary<string, string[]> CommandAndParameterParser(string text)
+        {
+            Dictionary<string, string[]> commandAndParameters = new Dictionary<string, string[]>();
+
+            //split the command from the parameters 
+            string[] parameters = Strip(text).Split(new char[] { " "[0] }, 2);
+
+            //set command var
+            string command = Strip(parameters[0]);
+            commandAndParameters["command"] = new string[] { command };
+
+            //seperate all of the parameters by a comma
+            parameters = parameters[1].Split(","[0]);
+
+            //Remove spaces around parameters
+            parameters = StripStringArray(parameters).ToArray();
+
+            //set parameter list
+            commandAndParameters["parameters"] = parameters;
+
+            return commandAndParameters;
+        }
     }
 }