source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/VerticalAxisTitle.cs @ 13401

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

namespace Microsoft.Research.DynamicDataDisplay
{
  /// <summary>
  /// Represents a title of vertical axis. Can be placed from left or right of Plotter.
  /// </summary>
  public class VerticalAxisTitle : ContentControl, IPlotterElement
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="VerticalAxisTitle"/> class.
    /// </summary>
    public VerticalAxisTitle()
    {
      ChangeLayoutTransform();
      VerticalAlignment = VerticalAlignment.Center;
      FontSize = 16;
    }

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

    private void ChangeLayoutTransform()
    {
      if (placement == AxisPlacement.Left)
        LayoutTransform = new RotateTransform(-90);
      else
        LayoutTransform = new RotateTransform(90);
    }

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

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

      var hostPanel = GetHostPanel(plotter);
      var index = GetInsertPosition(hostPanel);

      hostPanel.Children.Insert(index, this);
    }

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

      var hostPanel = GetHostPanel(plotter);

      hostPanel.Children.Remove(this);
    }

    private Panel GetHostPanel(Plotter plotter)
    {
      if (placement == AxisPlacement.Left)
        return plotter.LeftPanel;
      else
        return plotter.RightPanel;
    }

    private int GetInsertPosition(Panel panel)
    {
      if (panel == null)
        throw new ArgumentNullException("panel = null");

      if (placement == AxisPlacement.Left)
        return 0;
      else
        return panel.Children.Count;
    }

    private AxisPlacement placement = AxisPlacement.Left;
    /// <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("VerticalAxisTitle only supports Left and Right values of AxisPlacement, you passed '{0}'", value), "Placement");

        if (placement != value)
        {
          if (plotter != null)
          {
            var oldPanel = GetHostPanel(plotter);
            oldPanel.Children.Remove(this);
          }

          placement = value;

          ChangeLayoutTransform();

          if (plotter != null)
          {
            var hostPanel = GetHostPanel(plotter);
            var index = GetInsertPosition(hostPanel);
            hostPanel.Children.Insert(index, this);
          }
        }
      }
    }
  }
}