v1.0.0 (apelles)

What's New

Methods of subclasses of the X11 Canvas class that start with the draw_ prefix will be re-bound to the cairo context passed to the on_draw callback method. For example,

class DrawMethodsCanvas(x11.Canvas):
    def on_button_pressed(self, button, state, x, y):
        if button == 1:
            self.destroy()

    def draw_rect(ctx, width, height):
        ctx.set_source_rgb(*[r() for _ in range(3)])
        ctx.rectangle(0, 0, width, height)
        ctx.fill()

    def on_draw(self, ctx):
        for i in range(4):
            ctx.draw_rect(self.width >> i, self.height >> i)

Whilst the method draw_rect is defined inside the DrawMethodsCanvas class, inside the on_draw method it can be accessible as a method of ctx (which is now an instance of ExtendedContext, a wrapper around cairo.Context).