Widget_Distance *widget_bline_width;
Widget_Gradient *widget_gradient;
Widget_Enum *widget_blend_method;
Widget_Enum *widget_interpolation;
Gtk::HScale *widget_opacity;
Widget_Distance *widget_bline_width;
Widget_Gradient *widget_gradient;
Widget_Enum *widget_blend_method;
Widget_Enum *widget_interpolation;
Gtk::HScale *widget_opacity;