// Draw the center TimeLines.
offGraphics.setColor( Color.cyan );
for ( irow = 0 ; irow < num_rows ; irow++ ) {
// Select only non-expanded row
if ( ! tree_view.isExpanded( irow ) ) {
i_Y = coord_xform.convertRowToPixel( (float) irow );
offGraphics.drawLine( 0, i_Y, offImage_width-1, i_Y );
}
}
// Draw the image separator when in Debug or Profile mode