source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Charts/VisualDebug.cs @ 13847

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;
using System.Windows.Media;
using System.Diagnostics.Contracts;
using System.Windows.Shapes;

namespace Microsoft.Research.DynamicDataDisplay.Charts
{
  /// <summary>
  /// This is a class for displaying some debug visuals on the plotter;
  /// </summary>
  public class VisualDebug : IPlotterElement
  {
    private Plotter2D plotter;
    private static readonly ViewportHostPanel panel = new ViewportHostPanel();
    private static readonly VisualDebug current = new VisualDebug();
    private static readonly Dictionary<string, object> objects = new Dictionary<string, object>();

    public static void DrawRectangle(string name, DataRect bounds, Brush stroke = null, Brush fill = null, double strokeThickness = 1.0)
    {
      Contract.Assert(name != null);

      if (stroke == null)
        stroke = Brushes.Blue;

      Rectangle rect;
      if (objects.ContainsKey(name))
        rect = (Rectangle)objects[name];
      else
      {
        rect = new Rectangle();
        objects.Add(name, rect);
      }

      rect.Stroke = stroke;
      rect.StrokeThickness = strokeThickness;
      rect.Fill = fill;

      ViewportPanel.SetViewportBounds(rect, bounds);

      if (rect.Parent == null)
        panel.Children.Add(rect);

      EnsurePanelAdded();
    }

    private static void EnsurePanelAdded()
    {
      if (Plotter.Current == null)
        return;
      if (panel.Parent != null)
        return;

      Plotter.Current.Children.Add(panel);
    }

    #region IPlotterElement Members

    public void OnPlotterAttached(Plotter plotter)
    {
      this.plotter = (Plotter2D)plotter;
      plotter.Dispatcher.BeginInvoke(() =>
      {
        plotter.Children.Add(panel);
      });
    }

    public void OnPlotterDetaching(Plotter plotter)
    {
      plotter.Dispatcher.BeginInvoke(() =>
      {
        plotter.Children.Remove(panel);
      });

      this.plotter = null;
    }

    public Plotter Plotter
    {
      get { return plotter; }
    }

    #endregion
  }
}