/// <summary>
/// Initializes a new instance of the <see cref="LineScrollAxis"/> class.
/// </summary>
/// <param name="sb">The state of the scrollbar.</param>
/// <param name="scrollLinesHost">The scroll lines host.</param>
public LineScrollAxis(IScrollBar sb, ILineSizeHost scrollLinesHost)
: base(sb, scrollLinesHost)
{
var distancesHost = scrollLinesHost as IDistancesHost;
distances = distancesHost != null ? distancesHost.Distances : new DistanceRangeCounterCollection();
if (scrollLinesHost != null)
{
scrollLinesHost.InitializeScrollAxis(this);
}
distances.DefaultDistance = 1.0;
}
/// <summary>
/// Initializes a new instance of the <see cref="PixelScrollAxis"/> class.
/// </summary>
/// <param name="sb">The scrollbar state.</param>
/// <param name="scrollLinesHost">The scroll lines host.</param>
/// <param name="distancesHost">The distances host.</param>
public PixelScrollAxis(IScrollBar sb, ILineSizeHost scrollLinesHost, IDistancesHost distancesHost)
: base(sb, scrollLinesHost)
{
if (distancesHost != null)
{
this.distancesHost = distancesHost;
}
else if (scrollLinesHost != null)
{
this.distances = new DistanceRangeCounterCollection
{
DefaultDistance = scrollLinesHost.GetDefaultLineSize()
};
scrollLinesHost.InitializeScrollAxis(this);
}
if (Distances == null)
{
throw new ArgumentNullException("Distances");
}
}
