using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;

namespace HeuristicLab.MainForm.WPF {

  public abstract class WPFView : UserControl, IView {    

    private string caption = "WPF View";
    public string Caption {
      get {
        return caption;
      }
      set {
        if (value == caption) return;
        if (value == null) throw new ArgumentNullException("View caption cannot be null");
        caption = value;
        OnCaptionChanged();
      }
    }
    public event EventHandler CaptionChanged;
    protected void OnCaptionChanged() {
      EventHandler handler = CaptionChanged;
      if (handler != null)
        handler(this, EventArgs.Empty);
    }    

    public event EventHandler Changed;

    protected void OnChanged() {
      EventHandler handler = Changed;
      if (handler != null)
        handler(this, EventArgs.Empty);
    }

    public virtual void Close() {
      MainFormManager.GetMainForm<WPFMainFormBase>().CloseView(this);
      IsShown = false;
    }

    public void Hide() {
      MainFormManager.GetMainForm<WPFMainFormBase>().HideView(this);
      IsShown = false;
    }
    
    public bool IsShown { get; protected set; }

    private bool readOnly = false;
    public bool ReadOnly {
      get {
        return readOnly;
      }
      set {
        if (value == readOnly) return;
        readOnly = value;
        OnReadOnlyChanged();
      }
    }
    public event EventHandler ReadOnlyChanged;
    protected void OnReadOnlyChanged() {
      EventHandler handler = ReadOnlyChanged;
      if (handler != null)
        handler(this, EventArgs.Empty);
    }

    protected abstract void OnFirstTimeShown();

    public void Show() {
      if (MainFormManager.GetMainForm<WPFMainFormBase>().ShowView(this))
        OnFirstTimeShown();
      IsShown = true;
    }
    
  }
}