Called when drawing a region begins. The region to be drawn is indicated by start and end. The purpose is to allow the implementation to precompute some state before the draw method is called for each cell.
a #cairo_t
a #GdkRectangle
a #GtkTextIter
Called when drawing a region begins. The region to be drawn is indicated by start and end. The purpose is to allow the implementation to precompute some state before the draw method is called for each cell.