Warning
gdk_draw_line has been deprecated since version 2.22 and should not be used in newly-written code. Use cairo_line_to() and cairo_stroke() instead.
Be aware that the default line width in Cairo is 2 pixels and that your
coordinates need to describe the center of the line. To draw a single
Warning gdk_draw_line has been deprecated since version 2.22 and should not be used in newly-written code. Use cairo_line_to() and cairo_stroke() instead. Be aware that the default line width in Cairo is 2 pixels and that your coordinates need to describe the center of the line. To draw a single