source: trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Tools/PolygonTool.cs @ 2768

using System;
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace Netron.Diagramming.Core
{
   
    class PolygonTool : AbstractTool, IMouseListener, IKeyboardListener
    {

        #region Fields
        /// <summary>
        /// the location of the mouse when the motion starts
        /// </summary>
        
        private bool doDraw;
        private Point[] points;
        #endregion

        #region Constructor
        /// <summary>
        /// Initializes a new instance of the <see cref="T:PolygonTool"/> class.
        /// </summary>
        /// <param name="name">The name of the tool.</param>
        public PolygonTool(string name) : base(name)
        {
        }
        #endregion

        #region Methods

        /// <summary>
        /// Called when the tool is activated.
        /// </summary>
        protected override void OnActivateTool()
        {
            Controller.View.CurrentCursor =CursorPalette.Cross;
            this.SuspendOtherTools(); 
            doDraw = false;
            points = new Point[1];
        }

        /// <summary>
        /// Handles the mouse down event
        /// </summary>
        /// <param name="e">The <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
        /// <returns>Returns 'true' if the event was handled, otherwise 'false'.</returns>
        public bool MouseDown(MouseEventArgs e)
        {
            if (e == null)
                throw new ArgumentNullException("The argument object is 'null'");
            if (e.Button == MouseButtons.Left && Enabled && !IsSuspended)
            {
                    Array.Resize<Point>(ref points, points.Length + 1);
                    points[points.Length-2]= e.Location;
                    doDraw = true;
                    return true;           
            }
            return false;
        }

        /// <summary>
        /// Handles the mouse move event
        /// </summary>
        /// <param name="e">The <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
        public void MouseMove(MouseEventArgs e)
        {
            if (e == null)
                throw new ArgumentNullException("The argument object is 'null'");
            Point point = e.Location;
            if(IsActive && doDraw)
            {
                points[points.Length - 1] = e.Location;                
                Controller.View.PaintGhostLine( MultiPointType.Polygon, points);
                //Controller.View.Invalidate(System.Drawing.Rectangle.Inflate(Controller.View.Ghost.Rectangle, 20, 20));
                //TODO: find a more performant way to invalidate the area
                Controller.View.Invalidate();
            }            
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="e">The <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
        public void MouseUp(MouseEventArgs e)
        {
            if (IsActive)
            {
               
            }
        }
        private void Package()
        {
            if ((points == null) ||
               (points.Length < 1) ||
               (points[0] == Point.Empty))
            {
                return;
            }

            MultiPointShape shape = new MultiPointShape(
                this.Controller.Model, 
                points, 
                MultiPointType.Polygon);

            AddMultiPointShapeCommand cmd = new AddMultiPointShapeCommand(this.Controller, shape);
            this.Controller.UndoManager.AddUndoCommand(cmd);
            cmd.Redo();
        }
        #endregion

        #region IKeyboardListener Members

        public void KeyDown(KeyEventArgs e)
        {       
            if(e.KeyData == Keys.Escape && IsActive)
            {
                DeactivateTool();
                Package();       
                e.Handled = true;
            }
        }

        public void KeyUp(KeyEventArgs e)
        {
        }

        public void KeyPress(KeyPressEventArgs e)
        {
        }

        #endregion
    }

}