source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Charts/Navigation/HorizontalScrollBar.cs @ 12503

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

namespace Microsoft.Research.DynamicDataDisplay.Charts.Navigation
{
  /// <summary>
  /// Represents a horizontal scroll bar on the borrom of <see cref="Plotter"/>.
  /// Uses ChartPlotter.Plotter.Viewport.DataDomain property as a source of data about current position and position limits.
  /// </summary>
  public sealed class HorizontalScrollBar : PlotterScrollBar
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="HorizontalScrollBar"/> class.
    /// </summary>
    public HorizontalScrollBar()
    {
      ScrollBar.Orientation = Orientation.Horizontal;
    }

    protected override void UpdateScrollBar(Viewport2D viewport)
    {
      if (viewport != null && !viewport.Domain.IsEmpty)
      {
        var visibleRange = new Range<double>(viewport.Visible.XMin, viewport.Visible.XMax);

        double size = visibleRange.Max - visibleRange.Min;
        ScrollBar.ViewportSize = size;

        var domainRange = new Range<double>(viewport.Domain.XMin, viewport.Domain.XMax);
        ScrollBar.Minimum = domainRange.Min;
        ScrollBar.Maximum = domainRange.Max - size;

        ScrollBar.Value = visibleRange.Min;

        ScrollBar.Visibility = Visibility.Visible;
      }
      else
      {
        ScrollBar.Visibility = Visibility.Collapsed;
      }
    }

    protected override DataRect CreateVisibleRect(DataRect rect, double value)
    {
      rect.XMin = value;
      return rect;
    }

    protected override Panel GetHostPanel(Plotter plotter)
    {
      return plotter.BottomPanel;
    }
  }
}