public void undoClick()
{
Bitmap lastImage = (Bitmap)undoRedo.GetFromUndoBuffer();
if (lastImage != null)
{
undoRedo.AddToRedoBuffer((Bitmap)model.getMainImage().Clone());
model.setMainImage(lastImage);
lastImage = (Bitmap)lastImage.Clone();
}
if (channelsOn)
{
this.showChannelsClick();
}
else
{
this.view.ShowImage(model.getMainImage(), model.getImageName());
}
}