///<summary>
/// Called when an asynchronous Find Next/Previous operation finishes.
///</summary>
void FindAsyncCallback(IAsyncResult ar)
{
GenericFindOperation state = (GenericFindOperation)ar.AsyncState;
ThreadedAsyncOperation.OperationResult result = state.Result;
Range match = state.Match;
DataView dv = null;
// find DataView that owns bb
foreach (DataViewDisplay dvtemp in dataBook.Children)
{
if (dvtemp.View.Buffer == strategy.Buffer)
{
dv = dvtemp.View;
break;
}
}
// decide what to do based on the result of the find operation
switch (result)
{
case ThreadedAsyncOperation.OperationResult.Finished:
if (match != null)
{
lastFound = match;
dv.SetSelection(match.Start, match.End); //System.Console.WriteLine("Found at {0}-{1}", r.Start, r.End);
dv.MoveCursor(match.End + 1, 0);
dv.Display.MakeOffsetVisible(match.Start, DataViewDisplay.ShowType.Closest);
}
else
{
lastFound.Clear();
}
break;
case ThreadedAsyncOperation.OperationResult.Cancelled:
dv.MoveCursor(strategy.Position, 0);
dv.Display.MakeOffsetVisible(strategy.Position, DataViewDisplay.ShowType.Closest);
break;
case ThreadedAsyncOperation.OperationResult.CaughtException:
break;
default:
break;
}
inUse = false;
// if user provided a callback, call it now
if (userFindAsyncCallback != null)
{
userFindAsyncCallback(ar);
}
// notify that the find operation has finished
findFinishedEvent.Set();
}
///<summary>
/// Handles operations that will surely produce on result (eg when
/// no DataView exists).
///</summary>
IAsyncResult HandleProblematicOp(GenericFindOperation op, AsyncCallback ac)
{
op.Result = GenericFindOperation.OperationResult.Finished;
findFinishedEvent.Reset();
IAsyncResult iar = new ThreadedAsyncResult(op, findFinishedEvent, true);
if (ac != null)
{
ac(iar);
}
findFinishedEvent.Set();
return(iar);
}