public void ClearScanRegion()
{
if (_region != null)
{
_document.MarkerStrategy.RemoveMarker(_region);
_document.TextContentChanged -= DocumentOnTextContentChanged;
_region = null;
ScanRegionChanged?.Invoke(this, EventArgs.Empty);
}
}
/// <summary>Sets the region to search. The region is updated
/// automatically as the document changes.</summary>
public void SetScanRegion(int offset, int length)
{
Color bkgColor = _document.HighlightingStrategy.GetColorFor("Default").BackgroundColor;
_region = new TextMarker(offset, length, TextMarkerType.SolidBlock,
Globals.HalfMix(bkgColor, Color.FromArgb(160, 160, 160)));
_document.MarkerStrategy.AddMarker(_region);
_document.TextContentChanged += DocumentOnTextContentChanged;
ScanRegionChanged?.Invoke(this, EventArgs.Empty);
}