LineLengthLabel.cs

#region ================== Copyright (c) 2007 Pascal vd Heiden

/*
 * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
 * This program is released under GNU General Public License
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 */

#endregion

#region ================== Namespaces

using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;
using CodeImp.DoomBuilder.Windows;
using CodeImp.DoomBuilder.IO;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Rendering;
using CodeImp.DoomBuilder.Geometry;
using System.Drawing;
using CodeImp.DoomBuilder.Editing;
using CodeImp.DoomBuilder;

#endregion

namespace TriDelta.DrawTextMode
{
    public class LineLengthLabel : IDisposable {
		#region ================== Constants

        private const int TEXT_CAPACITY = 15;
        private const float TEXT_SCALE = 14f;
        private const string VALUE_FORMAT = "0";

		#endregion

		#region ================== Variables

        protected TextLabel label;
        protected Vector2D start;
        protected Vector2D end;
        private bool showAngle; //mxd

        #endregion

		#region ================== Properties

		public TextLabel TextLabel { get { return label; } }
		public Vector2D Start { get { return start; } set { start = value; Update(); } }
		public Vector2D End { get { return end; } set { end = value; Update(); } }

		#endregion

		#region ================== Constructor / Disposer

        // Constructor
        public LineLengthLabel(bool showAngle) {
            this.showAngle = showAngle; //mxd
            // Initialize
            Initialize();
        }

        // Constructor
        public LineLengthLabel(Vector2D start, Vector2D end) {
            // Initialize
            Initialize();
            Move(start, end);
        }

        // Initialization
        protected virtual void Initialize() {
            label = new TextLabel(TEXT_CAPACITY);
            label.AlignX = TextAlignmentX.Center;
            label.AlignY = TextAlignmentY.Middle;
            label.Color = General.Colors.Highlight;
            label.Backcolor = General.Colors.Background;
            label.Scale = TEXT_SCALE;
            label.TransformCoords = true;
        }

        // Disposer
        public void Dispose() {
            label.Dispose();
        }

		#endregion
		
		#region ================== Methods

        // This updates the text
        protected virtual void Update() {
            Vector2D delta = end - start;
            float length = delta.GetLength();

            //mxd
            if (showAngle) {
                float rads = (float)Math.Atan2(-(start.y - end.y), -(start.x - end.x));
                if (rads < 0)
                    rads += (float)(Math.PI * 2);
                int angle = (int)Math.Round(rads * 180 / Math.PI);

                label.Text = "l:" + length.ToString(VALUE_FORMAT) + "; a:" + angle;
            } else {
                label.Text = length.ToString(VALUE_FORMAT);
            }

            label.Rectangle = new RectangleF(start.x + delta.x * 0.5f, start.y + delta.y * 0.5f, 0f, 0f);
        }

        // This moves the label
        public void Move(Vector2D start, Vector2D end) {
            this.start = start;
            this.end = end;
            Update();
        }

        #endregion
    }
}