#! /usr/bin/python

import gtk
import rsvg

up_arrow = ((0,0),(0.2,0.2),(0.1,0.2),(0.1,0.4),(-0.1,0.4),(-0.1,0.2),(-0.2,0.2))

def make_shape(size, x, y, shape):
    points = []
    for p in shape:
        points += (int(size * (p[0] + x)), int(size * (p[1] + y))),
    return points

class MyWidget(gtk.DrawingArea):
    def __init__(self):
        gtk.DrawingArea.__init__(self)
        self.gc = None  # initialized in realize-event handler
        self.id = ""    # set to # + svg group id: value
        self.width  = 0 # updated in size-allocate handler
        self.height = 0 # idem
        self.connect('size-allocate', self.on_size_allocate)
        self.connect('expose-event',  self.on_expose_event)
        self.connect('realize',       self.on_realize)
        self.connect('button_press_event', self.button_press)

    def on_realize(self, widget):
        self.gc = widget.window.new_gc()
        self.gc.set_line_attributes(3, gtk.gdk.LINE_ON_OFF_DASH,
                                    gtk.gdk.CAP_ROUND, gtk.gdk.JOIN_ROUND)

    def on_size_allocate(self, widget, allocation):
        self.width = allocation.width
        self.height = allocation.height

    def on_expose_event(self, widget, event):
        cr =  widget.window.cairo_create()
        x,y,w,h = widget.allocation
        print x,y,w,h
        cr.scale(w/100.0, w/100.0)
        svg=rsvg.Handle(file="probe.svg")
        svg.render_cairo(cr=cr, id=self.id)
        return True

    def button_press(self, widget, event):
        print event

win = gtk.Window(gtk.WINDOW_TOPLEVEL)
win.set_border_width(0)
win.set_default_size(300,150)
box = gtk.HBox(True,0)
w1 = MyWidget()
w1.id = "#ID"
w1.add_events(gtk.gdk.BUTTON_PRESS_MASK)
w2 = MyWidget()
w2.id = "#OD"
w3 = MyWidget()
w3.id = "#YOut"
w4 = MyWidget()
w4.id = "#YIn"
w1.add_events(gtk.gdk.BUTTON_PRESS_MASK)
box.pack_start(w1, True, True, 1)
box.add(w2)
box.add(w3)
box.pack_end(w4, True, True, 1)
box.show
win.add(box)
win.show_all()
win.connect("destroy", lambda w: gtk.main_quit())
gtk.main()