Demo for testing gtk.Curve

gtk-curve-test.py

#!/usr/bin/env python
# Demo for testing gtk.Curve
# John Stowers 2009

import random
import gtk

class UI:

    TYPES = (gtk.CURVE_TYPE_LINEAR, gtk.CURVE_TYPE_SPLINE, gtk.CURVE_TYPE_FREE)
    N = 1000

    def __init__(self):
        self.c = gtk.Curve()
        self.t = 0

        vb = gtk.VBox()
        vb.pack_start(self.c, True, True)

        b = gtk.Button("Add")
        b.connect("clicked", self._on_add)
        vb.pack_start(b, False, False)

        b = gtk.Button("Type")
        b.connect("clicked", self._on_type)
        vb.pack_start(b, False, False)

        w = gtk.Window()
        w.add(vb)
        w.show_all()
        w.connect("delete-event", lambda *args: gtk.main_quit())

    def _on_add(self, *args):
        d = [random.random() for i in range(self.N)]
        self.c.set_vector(d)
        self.c.set_curve_type( self.TYPES[self.t] )

    def _on_type(self, *args):
        self.t = (self.t + 1) % len(self.TYPES)
        self.c.set_curve_type( self.TYPES[self.t] )

        print "TYPE = ", self.TYPES[self.t]

if __name__ == "__main__":
    u = UI()
    gtk.main()