#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.Common;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.OptimizationExpertSystem.Common;
using System;

namespace HeuristicLab.OptimizationExpertSystem {
  [View("Expert-System View")]
  public partial class ExpertSystemViewBase : ItemView {
    public OptimizationExpertSystem MainForm {
      get { return (OptimizationExpertSystem)HeuristicLab.MainForm.MainFormManager.MainForm; }
    }

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

    protected ExpertSystemViewBase() {
      InitializeComponent();
    }

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.DownloadStarted += ContentOnDownloadStarted;
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
      Content.DownloadStarted -= ContentOnDownloadStarted;
    }

    protected virtual void OnDownloadStarted() { }
    protected virtual void OnDownloadEnded() { }

    private void ContentOnDownloadStarted(object sender, EventArgs<IProgress> e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs<IProgress>>)ContentOnDownloadStarted, sender, e); return; }
      MainForm.AddOperationProgressToView(this, e.Value);
      e.Value.ProgressStateChanged += ProgressOnStateChanged;
      OnDownloadStarted();
    }

    private void ProgressOnStateChanged(object sender, EventArgs e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs>)ProgressOnStateChanged, sender, e); return; }
      var progress = (IProgress)sender;
      if (progress == null || progress.ProgressState == ProgressState.Started) return;
      OnDownloadEnded();
    }
  }
}