void ClearPreview()
{
renderer.CancelAsync();
lock ( redrawLock ) {
previewImage = null;
preview.Image = null;
}
}
void ClearPreview()
{
string stack = Environment.StackTrace;
Debug.WriteLine("ClearPreview() @ " + stack.Substring(0, stack.IndexOf("at System.Windows.Forms.Control.WndProc")));
renderer.CancelAsync();
lock ( redrawLock ) {
previewImage = null;
preview.Image = null;
}
}
void Redraw(bool drawAgain)
{
lock ( redrawLock ) {
progressBar.Visible = true;
progressBar.Style = ProgressBarStyle.Continuous;
if (bwRenderer.IsBusy)
{
renderer.CancelAsync();
bwRenderer.CancelAsync();
while (bwRenderer.IsBusy)
{
Thread.Sleep(1);
Application.DoEvents();
}
}
if (drawAgain)
{
renderer.Rotation = previewRotation;
bwRenderer.RunWorkerAsync();
}
}
}