using System;
using System.Windows.Forms;
using HeuristicLab.Core;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Encodings.ParameterConfigurationEncoding.Views {
  [View("Constrained Item List View")]
  [Content(typeof(ConstrainedItemList<>), IsDefaultView = true)]
  public sealed partial class ConstrainedItemListView<T> : ItemListView<T> where T : class, IItem {
    public new ConstrainedItemList<T> Content {
      get { return (ConstrainedItemList<T>)base.Content; }
      set { base.Content = value; }
    }

    public ConstrainedItemListView() {
      InitializeComponent();
    }

    protected override T CreateItem() {
      if (typeSelectorDialog == null) {
        typeSelectorDialog = new TypeSelectorDialog();
        typeSelectorDialog.Caption = "Select Item";
        typeSelectorDialog.TypeSelector.Caption = "Available Items";
        typeSelectorDialog.TypeSelector.Configure(Content.Type, false, true);
      }

      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          return (T)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
      return null;
    }
  }
}