public void OnTimer(object sender, EventArgs args)
{
if (Interlocked.Exchange(ref _pendingModificationsCount, value: 0) > 0)
{
try
{
PartTextCanvas.DetermineVerticalOffset();
PartTextCanvas.CurrentlyVisibleSection = CalculateVisibleSection();
UpdateScrollViewerRegions();
ScrollToBottomIfRequired();
PartTextCanvas.UpdateVisibleLines();
PartTextCanvas.OnMouseMove();
}
catch (Exception e)
{
Log.ErrorFormat("Caught unexpected exception while updating: {0}", e);
// Common sense says that functions which fail once work when tried again.
// The same goes for this control: If drawing fails then it's conceivable
// that it will work when we try again in a few milliseconds...
Interlocked.Increment(ref _pendingModificationsCount);
}
}
}
private void OnLogFileChanged(ILogSource oldValue, ILogSource newValue)
{
oldValue?.RemoveListener(this);
PartTextCanvas.LogSource = newValue;
if (newValue != null)
{
newValue.AddListener(this, TimeSpan.FromMilliseconds(value: 100), maximumLineCount: 10000);
_maxLineWidth = (int)Math.Ceiling(_textSettings.EstimateWidthUpperLimit(newValue.GetProperty(TextProperties.MaxCharactersInLine)));
UpdateScrollViewerRegions();
PartTextCanvas.DetermineVerticalOffset();
PartTextCanvas.UpdateVisibleSection();
PartTextCanvas.UpdateVisibleLines();
}
else
{
_maxLineWidth = 0;
TextCanvasOnVisibleLinesChanged();
UpdateScrollViewerRegions();
}
MatchScrollbarValueToCurrentLine();
}