source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Charts/ContentGraph.cs @ 12747

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.Windows;
using Microsoft.Research.DynamicDataDisplay.Common;

namespace Microsoft.Research.DynamicDataDisplay.Charts
{
  public abstract class ContentGraph : ContentControl, IPlotterElement
  {
    static ContentGraph()
    {
      EventManager.RegisterClassHandler(typeof(ContentGraph), Plotter.PlotterChangedEvent, new PlotterChangedEventHandler(OnPlotterChanged));
    }

    private static void OnPlotterChanged(object sender, PlotterChangedEventArgs e)
    {
      ContentGraph owner = (ContentGraph)sender;
      owner.OnPlotterChanged(e);
    }

    private void OnPlotterChanged(PlotterChangedEventArgs e)
    {
      if (plotter == null && e.CurrentPlotter != null)
      {
        plotter = (Plotter2D)e.CurrentPlotter;
        plotter.Viewport.PropertyChanged += Viewport_PropertyChanged;
        OnPlotterAttached();
      }
      if (plotter != null && e.PreviousPlotter != null)
      {
        OnPlotterDetaching();
        plotter.Viewport.PropertyChanged -= Viewport_PropertyChanged;
        plotter = null;
      }
    }

    #region IPlotterElement Members

    private void Viewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)
    {
      OnViewportPropertyChanged(e);
    }

    protected virtual void OnViewportPropertyChanged(ExtendedPropertyChangedEventArgs e) { }

    protected virtual Panel HostPanel
    {
      get { return plotter.CentralGrid; }
    }

    void IPlotterElement.OnPlotterAttached(Plotter plotter)
    {
      this.plotter = (Plotter2D)plotter;
      HostPanel.Children.Add(this);
      this.plotter.Viewport.PropertyChanged += Viewport_PropertyChanged;

      OnPlotterAttached();
    }

    protected virtual void OnPlotterAttached() { }

    void IPlotterElement.OnPlotterDetaching(Plotter plotter)
    {
      OnPlotterDetaching();

      this.plotter.Viewport.PropertyChanged -= Viewport_PropertyChanged;
      HostPanel.Children.Remove(this);
      this.plotter = null;
    }

    protected virtual void OnPlotterDetaching() { }

    private Plotter2D plotter;
    protected Plotter2D Plotter2D
    {
      get { return plotter; }
    }

    Plotter IPlotterElement.Plotter
    {
      get { return plotter; }
    }

    #endregion
  }
}