protected override void WindowGUI(int windowID)
        {
            if (btNormal == null)
            {
                btNormal = new GUIStyle(GUI.skin.button);
                btNormal.normal.textColor   = btNormal.focused.textColor = Color.white;
                btNormal.hover.textColor    = btNormal.active.textColor = Color.yellow;
                btNormal.onNormal.textColor = btNormal.onFocused.textColor = btNormal.onHover.textColor = btNormal.onActive.textColor = Color.green;
                btNormal.padding            = new RectOffset(8, 8, 8, 8);

                btActive           = new GUIStyle(btNormal);
                btActive.active    = btActive.onActive;
                btActive.normal    = btActive.onNormal;
                btActive.onFocused = btActive.focused;
                btActive.hover     = btActive.onHover;

                btAuto = new GUIStyle(btNormal);
                btAuto.normal.textColor = Color.red;
                btAuto.onActive         = btAuto.onFocused = btAuto.onHover = btAuto.onNormal = btAuto.active = btAuto.focused = btAuto.hover = btAuto.normal;
            }

            // If any other module use the attitude controler then let them do it
            if (core.attitude.enabled && core.attitude.users.Count(u => !this.Equals(u)) > 0)
            {
                GUILayout.Button("AUTO", btAuto, GUILayout.ExpandWidth(true));
            }
            else
            {
                GUILayout.BeginVertical();

                GUILayout.BeginHorizontal();
                TargetButton(Target.OFF);
                TargetButton(Target.KILLROT);
                TargetButton(Target.NODE);
                GUILayout.EndHorizontal();

                GUILayout.Label("Mode:");
                GUILayout.BeginHorizontal();
                ModeButton(Mode.ORBITAL);
                ModeButton(Mode.SURFACE);
                ModeButton(Mode.TARGET);
                ModeButton(Mode.ADVANCED);
                GUILayout.EndHorizontal();

                switch (mode)
                {
                case Mode.ORBITAL:
                    GUILayout.BeginHorizontal();
                    TargetButton(Target.PROGRADE);
                    TargetButton(Target.NORMAL_PLUS);
                    TargetButton(Target.RADIAL_PLUS);
                    GUILayout.EndHorizontal();
                    GUILayout.BeginHorizontal();
                    TargetButton(Target.RETROGRADE);
                    TargetButton(Target.NORMAL_MINUS);
                    TargetButton(Target.RADIAL_MINUS);
                    GUILayout.EndHorizontal();

                    ForceRoll();

                    break;

                case Mode.SURFACE:
                    GuiUtils.SimpleTextBox("HDG:", srfHdg);
                    GuiUtils.SimpleTextBox("PIT:", srfPit);
                    GuiUtils.SimpleTextBox("ROL:", srfRol);

                    if (GUILayout.Button("EXECUTE", GUILayout.ExpandWidth(true)))
                    {
                        target = Target.SURFACE;
                        Engage();
                    }
                    break;

                case Mode.TARGET:
                    if (core.target.NormalTargetExists)
                    {
                        GUILayout.BeginHorizontal();
                        TargetButton(Target.TARGET_PLUS);
                        TargetButton(Target.RELATIVE_PLUS);
                        TargetButton(Target.PARALLEL_PLUS);
                        GUILayout.EndHorizontal();
                        GUILayout.BeginHorizontal();
                        TargetButton(Target.TARGET_MINUS);
                        TargetButton(Target.RELATIVE_MINUS);
                        TargetButton(Target.PARALLEL_MINUS);
                        GUILayout.EndHorizontal();

                        ForceRoll();
                    }
                    else
                    {
                        GUILayout.Label("Please select a target");
                    }
                    break;

                case Mode.ADVANCED:
                    GUILayout.Label("Reference:");
                    advReference = (AttitudeReference)GuiUtils.ArrowSelector((int)advReference, Enum.GetValues(typeof(AttitudeReference)).Length, advReference.ToString());

                    GUILayout.Label("Direction:");
                    advDirection = (Vector6.Direction)GuiUtils.ArrowSelector((int)advDirection, Enum.GetValues(typeof(Vector6.Direction)).Length, advDirection.ToString());

                    if (GUILayout.Button("EXECUTE", btNormal, GUILayout.ExpandWidth(true)))
                    {
                        target = Target.ADVANCED;
                        Engage();
                    }
                    break;

                case Mode.AUTO:
                    break;
                }

                GUILayout.EndVertical();
            }

            base.WindowGUI(windowID);
        }