source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/HorizontalAxisTitle.cs @ 12747

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Markup;
using Microsoft.Research.DynamicDataDisplay.Charts;
using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;

namespace Microsoft.Research.DynamicDataDisplay
{
  /// <summary>
  /// Represents a title of horizontal axis. Can be placed from top or bottom of Plotter.
  /// </summary>
  public class HorizontalAxisTitle : ContentControl, IPlotterElement
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="HorizontalAxisTitle"/> class.
    /// </summary>
    public HorizontalAxisTitle()
    {
      FontSize = 16;
      HorizontalAlignment = HorizontalAlignment.Center;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="HorizontalAxisTitle"/> class.
    /// </summary>
    /// <param name="content">The content.</param>
    public HorizontalAxisTitle(object content)
      : this()
    {
      Content = content;
    }

    private Plotter plotter;
    public Plotter Plotter
    {
      get { return plotter; }
    }

    public void OnPlotterAttached(Plotter plotter)
    {
      this.plotter = plotter;
      AddToPlotter();
    }

    public void OnPlotterDetaching(Plotter plotter)
    {
      RemoveFromPlotter();
      this.plotter = null;
    }

    private Panel GetHostPanel(Plotter plotter)
    {
      if (placement == AxisPlacement.Bottom)
        return plotter.BottomPanel;
      else
        return plotter.TopPanel;
    }

    private int GetInsertPosition(Panel panel)
    {
      if (placement == AxisPlacement.Bottom)
        return panel.Children.Count;
      else
        return 0;
    }

    private AxisPlacement placement = AxisPlacement.Bottom;
    /// <summary>
    /// Gets or sets the placement of axis title.
    /// </summary>
    /// <value>The placement.</value>
    public AxisPlacement Placement
    {
      get { return placement; }
      set
      {
        if (!value.IsBottomOrTop())
          throw new ArgumentException(String.Format("HorizontalAxisTitle only supports Top and Bottom values of AxisPlacement, you passed '{0}'", value), "Placement");

        if (placement != value)
        {
          if (plotter != null)
          {
            RemoveFromPlotter();
          }

          placement = value;

          if (plotter != null)
          {
            AddToPlotter();
          }
        }
      }
    }

    private void RemoveFromPlotter()
    {
      var oldPanel = GetHostPanel(plotter);
      oldPanel.Children.Remove(this);
    }

    private void AddToPlotter()
    {
      var hostPanel = GetHostPanel(plotter);
      var index = GetInsertPosition(hostPanel);
      hostPanel.Children.Insert(index, this);
    }
  }
}