public QuoteViewer()
{
// IDs of the security for data and stylesheet for style
this.Tag = Int32.MinValue;
this.stylesheetId = Int32.MinValue;
InitializeComponent();
// This collects the changes to the data model and is used to generate incremental changes to the displayed document.
this.fragmentList = new FragmentList();
}
/// <summary>
/// Handles the event that is generated when all the data model changes have been incorporated.
/// </summary>
/// <param name="sender">Object that generated the event.</param>
/// <param name="e">This aregument isn't used.</param>
protected void EndMerge(object sender, EventArgs e)
{
// When all the fragments have been collected they are sent to be drawn in another thread. Note that a clean, empty
// fragment list is created each time the data model is changed. This prevents the data model event handlers from
// corrupting the list of fragments before they can be drawn.
if (this.fragmentList.IsValid)
{
if (this.fragmentList.Count != 0)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(DrawFragmentCommand), this.fragmentList);
this.fragmentList = new FragmentList();
}
}
else
{
DrawDocument();
this.fragmentList.Clear();
}
}