using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HeuristicLab.MainForm;
using HeuristicLab.Core.Views;
using HeuristicLab.Data;
using System.Threading;

namespace HeuristicLab.Problems.NK {

  [View("BoolMatrixBitmapView")]
  [Content(typeof(BoolMatrix), IsDefaultView = false)]
  public sealed partial class BoolMatrixView : ItemView {

    public new BoolMatrix Content {
      get { return (BoolMatrix)base.Content; }
      set { base.Content = value; }
    }

    public BoolMatrixView() {
      InitializeComponent();
    }    

    protected override void DeregisterContentEvents() {      
      Content.ToStringChanged -= new EventHandler(Content_ToStringChanged);
      base.DeregisterContentEvents();
    }    

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.ToStringChanged += new EventHandler(Content_ToStringChanged);
    }

    #region Event Handlers (Content)
    void Content_ToStringChanged(object sender, EventArgs e) {
      Rebuild();
    }
    #endregion

    private BackgroundWorker worker;
    private void Rebuild() {
      if (worker != null)
        worker.CancelAsync();
      worker = new BackgroundWorker();
      worker.WorkerSupportsCancellation = true;
      Thread.Sleep(1);
      var bitmap = new Bitmap(Content.Rows*4, Content.Columns*4);      
      worker.DoWork += (s, a) => {
        using (Graphics g = Graphics.FromImage(bitmap)) {
          for (int i = 0; i<Content.Rows; i++) {
            for (int j = 0; j<Content.Columns; j++) {
              if (worker.CancellationPending) {
                a.Cancel = true;
                break;
              }
              g.FillRectangle(Content[i, j] ? Brushes.Green : Brushes.Red,
                i*4, j*4, 3, 3);              
            }
          }
          g.Flush();
        }
      };
      worker.RunWorkerCompleted += (s, a) => {
        if (!a.Cancelled)
          pictureBox.Image = bitmap;
        if (!worker.CancellationPending)
          worker = null;
      };
      worker.RunWorkerAsync();
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        pictureBox.Image = new Bitmap(1, 1);        
      } else {
        Rebuild();
      }
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();      
    }

    #region Event Handlers (child controls)    
    #endregion
  }
}