self.mpd.clear()

        p = showconfig.songInMpd(song_path)

        self.mpd.add(p)

from __future__ import division

import sys,math,glob,random,os

from bisect import bisect_left,bisect,bisect_right

import Tkinter as tk

from dispatch import dispatcher

import run_local

from light9 import Submaster, dmxclient, networking

from light9.TLUtility import make_attributes_from_args

class Curve:

    """curve does not know its name. see Curveset"""

    points = None # x-sorted list of (x,y)

    def __init__(self):

        self.points = [(0,0),(10,0)]

    def load(self,filename):

        self.points[:]=[]

        for line in file(filename):

            self.points.append(tuple([float(a) for a in line.split()]))

        self.points.sort()

        dispatcher.send("points changed",sender=self)

    def save(self,filename):

        if filename.endswith('-music') or filename.endswith('_music'):

            print "not saving music track"

            return

        f = file(filename,'w')

        for p in self.points:

            f.write("%s %s\n" % p)

        f.close()

    def eval(self,t):

        i = bisect_left(self.points,(t,None))-1

        if self.points[i][0]>t:

            return self.points[i][1]

        if i>=len(self.points)-1:

            return self.points[i][1]

        p1,p2 = self.points[i],self.points[i+1]

        frac = (t-p1[0])/(p2[0]-p1[0])

        y = p1[1]+(p2[1]-p1[1])*frac

        return y

    def insert_pt(self,new_pt):

        i = bisect(self.points,(new_pt[0],None))

        self.points.insert(i,new_pt)

    __call__=eval

class Curveview(tk.Canvas):

    def __init__(self,master,curve,**kw):

        self.curve=curve

        self._time = 0

        tk.Canvas.__init__(self,master,width=10,height=10,

                           relief='sunken',bd=1,

                           closeenough=5,takefocus=1, **kw)

        self.selected_points=[] # idx of points being dragged

        self.update()

        # self.bind("<Enter>",self.focus)

        dispatcher.connect(self.input_time,"input time")

        dispatcher.connect(self.update,"zoom changed")

        dispatcher.connect(self.update,"points changed",sender=self.curve)

        self.bind("<Configure>",self.update)

        for x in range(1, 6):

            def add_kb_marker_point(evt, x=x):

                print "add_kb_marker_point", evt

                self.add_point((self.current_time(), (x - 1) / 4.0))

            self.bind("<Key-%s>" % x, add_kb_marker_point)

        for butnum,factor in (5, 1.5),(4, 1/1.5):

            self.bind("<ButtonPress-%s>"%butnum,

                      lambda ev,factor=factor:

                      dispatcher.send("zoom about mouse",

                                      t=self.world_from_screen(ev.x,0)[0],

                                      factor=factor))

        self.bind("<Key-Escape>",lambda ev:

                  dispatcher.send("see time",

                                  t=self.current_time()))

    def current_time(self):

        return self._time

    def screen_from_world(self,p):

        start,end = self.zoom

        ht = self.winfo_height()

        return (p[0]-start)/(end-start)*self.winfo_width(), (ht-5)-p[1]*(ht-10)

    def world_from_screen(self,x,y):

        start,end = self.zoom

        ht = self.winfo_height()

        return x/self.winfo_width()*(end-start)+start, ((ht-5)-y)/(ht-10)

    def input_time(self,val):

        t=val

        pts = self.screen_from_world((val,0))+self.screen_from_world((val,1))

        self.delete('timecursor')

        self.create_line(*pts,**dict(width=2,fill='red',tags=('timecursor',)))

        self._time = t

    def update(self,*args):

        self.zoom = dispatcher.send("zoom area")[0][1]

        cp = self.curve.points

        visible_x = (self.world_from_screen(0,0)[0],

                     self.world_from_screen(self.winfo_width(),0)[0])

        visleftidx = max(0,bisect_left(cp,(visible_x[0],None))-1)

        visrightidx = min(len(cp)-1,bisect_left(cp,(visible_x[1],None))+1)

        visible_points = cp[visleftidx:visrightidx+1]

        visible_idxs = range(visleftidx,visrightidx+1)

        self.delete('curve')

        self._draw_markers(visible_x)

        self._draw_line(visible_idxs,visible_points)

        self.dots = {} # idx : canvas rectangle

        if len(visible_points)<50:

            self._draw_handle_points(visible_idxs,visible_points)

    def _draw_markers(self,visible_x):

        mark = self._draw_one_marker

        mark(0,"0")

        t1,t2=visible_x

        if t2-t1<30:

            for t in range(int(t1),int(t2)+1):

                mark(t,str(t))

        mark(-4,"-4")

        endtimes = dispatcher.send("get max time")

        if endtimes:

            endtime = endtimes[0][1]

            mark(endtime,"end %.1f"%endtime)

            mark(endtime+10,"post %.1f"%(endtime+10))

    def _draw_one_marker(self,t,label):

        x = self.screen_from_world((t,0))[0]

        self.create_line(x,self.winfo_height(),x,self.winfo_height()-20,

                         tags=('curve',))

        self.create_text(x,self.winfo_height()-20,text=label,anchor='s',

                         tags=('curve',))

    def _draw_line(self,visible_idxs,visible_points):

        linepts=[]

        step=1

        linewidth=2

        if len(visible_points)>800:

            step = int(len(visible_points)/800)

            linewidth=1

        for p in visible_points[::step]:

            linepts.extend(self.screen_from_world(p))

        if len(linepts)<4:

            return

        line = self.create_line(*linepts,**dict(width=linewidth,tags='curve'))

        # canvas doesnt have keyboard focus, so i can't easily change the

        # cursor when ctrl is pressed

        #        def curs(ev):

        #            print ev.state

        #        self.bind("<KeyPress>",curs)

        #        self.bind("<KeyRelease-Control_L>",lambda ev: curs(0))

        self.tag_bind(line,"<Control-ButtonPress-1>",self.newpointatmouse)

    def _draw_handle_points(self,visible_idxs,visible_points):

        for i,p in zip(visible_idxs,visible_points):

            rad=3

            worldp = p

            p = self.screen_from_world(p)

            dot = self.create_rectangle(p[0]-rad,p[1]-rad,p[0]+rad,p[1]+rad,

                                        outline='black',fill='blue',

                                        tags=('curve','point', 'handle%d' % i))

            if worldp[1] == 0:

                rad += 3

                dot2 = self.create_oval(p[0]-rad,p[1]-rad,

                                             p[0]+rad,p[1]+rad,

                                             outline='darkgreen',

                                             tags=('curve','point', 'handle%d' % i))

            self.tag_bind('handle%d' % i,"<ButtonPress-1>",

                          lambda ev,i=i: self.dotpress(ev,i))

            self.bind("<Motion>",

                      lambda ev,i=i: self.dotmotion(ev,i))

            self.bind("<ButtonRelease-1>",

                      lambda ev,i=i: self.dotrelease(ev,i))

            self.dots[i]=dot

        self.highlight_selected_dots()

    def newpointatmouse(self, ev):

        p = self.world_from_screen(ev.x,ev.y)

        x, y = p

        y = max(0, y)

        y = min(1, y)

        p = x, y

        self.add_point(p)

    def add_point(self, p):

        self.unselect()

        self.curve.insert_pt(p)

        self.update()

    def highlight_selected_dots(self):

        for i,d in self.dots.items():

            if i in self.selected_points:

                self.itemconfigure(d,fill='red')

            else:

                self.itemconfigure(d,fill='blue')

    def dotpress(self,ev,dotidx):

        self.selected_points=[dotidx]

        self.highlight_selected_dots()

    def dotmotion(self,ev,dotidx):

        cp = self.curve.points

        moved=0

        for idx in self.selected_points:

            x,y = self.world_from_screen(ev.x,ev.y)

            y = max(0,min(1,y))

            if idx>0 and x<=cp[idx-1][0]:

                continue

            if idx<len(cp)-1 and x>=cp[idx+1][0]:

                continue

            moved=1

            cp[idx] = (x,y)

        if moved:

            self.update()

    def unselect(self):

        self.selected_points=[]

        self.highlight_selected_dots()

    def dotrelease(self,ev,dotidx):

        self.unselect()

class Curveset:

    curves = None # curvename : curve

    def __init__(self):

        self.curves = {}

    def load(self,basename):

        """find all files that look like basename-curvename and add

        curves with their contents"""

        for filename in glob.glob("%s-*"%basename):

            curvename = filename[filename.find('-')+1:]

            c=Curve()

            c.load(filename)

            curvename = curvename.replace('-','_')

            self.add_curve(curvename,c)            

    def save(self,basename):

        """writes a file for each curve with a name

        like basename-curvename"""

        for name,cur in self.curves.items():

            cur.save("%s-%s" % (basename,name))

    def add_curve(self,name,curve):

        self.curves[name] = curve

        dispatcher.send("add_curve",sender=self,name=name)

    def globalsdict(self):

        return self.curves.copy()

    def new_curve(self,name):

        if name=="":

            print "no name given"

            return

        while name in self.curves:

           name=name+"-1"

        self.add_curve(name,Curve())

class Curvesetview(tk.Frame):

    curves = None # curvename : Curveview

    def __init__(self,master,curveset,**kw):

        self.curves = {}

        self.curveset = curveset

        tk.Frame.__init__(self,master,**kw)

        f = tk.Frame(self,relief='raised',bd=1)

        f.pack(side='top',fill='x')

        tk.Button(f,text="new curve named:",

                  command=lambda: self.curveset.new_curve(self.newcurvename.get())).pack(side='left')

        self.newcurvename = tk.StringVar()

        tk.Entry(f,textvariable=self.newcurvename).pack(side='left',

                                                        fill='x',exp=1)

        dispatcher.connect(self.add_curve,"add_curve",sender=self.curveset)

    def add_curve(self,name):

        f = tk.Frame(self,relief='raised',bd=1)

        f.pack(side='top',fill='both',exp=1)

        tk.Label(f,text="curve %r"%name,width=15).pack(side='left')

        cv = Curveview(f,self.curveset.curves[name])

        cv.pack(side='right',fill='both',exp=1)

        self.curves[name] = cv

        raise OSError(

            "LIGHT9_SHOW env variable has not been set to the show root")

def songInMpd(song):

    """mpd only works off its own musicroot, which for me is

    /my/music. song is a file in musicDir; this function returns a

    version starting with the mpd path, but minus the mpd root itself.

    the mpc ~/.mpdconf """

    if 'dance2005' in root():

        return "projects/dance2005/%s" % song

    raise NotImplementedError