#!/usr/bin/python

import cairo
import sys

from gi.repository import Gtk


class Example(Gtk.Window):

    def __init__(self, width):
        super(Example, self).__init__()
        self._width = width
        self.init_ui()

    def init_ui(self):

        darea = Gtk.DrawingArea()
        darea.connect("draw", self.on_draw)
        self.add(darea)

        self.set_title("Linear gradients")
        self.resize(340, 390)
        self.set_position(Gtk.WindowPosition.CENTER)
        self.connect("delete-event", Gtk.main_quit)
        self.show_all()

    def on_draw(self, wid, cr):
        gradient = cairo.LinearGradient(0.500000, 0.000000, 0.500000, 1.000000)

        gradient.add_color_stop_rgba(0.0, 0.105882, 0.180392, 0.054902, 1.000000)
        gradient.add_color_stop_rgba(1.000000, 0.286275, 0.423529, 0.129412, 1.000000)

        cr.scale(self._width, 390)

        cr.rectangle(0, 0, 1, 1)
        cr.set_source(gradient)
        cr.fill()

def main(width):

    Example(width)
    Gtk.main()


if __name__ == "__main__":
    print("Pass 'work' as first argument to make it working, ie. try to render a gradient with width == 131071 instead of 131072")

    width = 131072
    if len(sys.argv) == 2 and sys.argv[1] == "work":
        width = 131071
    main(width)