In This Package:

Gui.py

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#!/usr/bin/env python
'''
An external event looper for nuwa.py that provides a GUI.
'''

from Tkinter import *

class Main(Frame):
    def __init__(self,app,master=None):
        Frame.__init__(self,master)
        self.app = app
        self.pack()
        self.createWidgets()
        self._canvas = None
        self._histogram = None
        from DybPython.Control import nuwa
        self._nevents = nuwa.opts.executions
        return

    def createWidgets(self):
        b = Button(self)
        b['text'] = 'Quit'
        b['fg'] = 'red'
        b['command'] = self.quit
        b.pack({'side':'left'})
        self.b_quit = b

        b = Button(self)
        b['text'] = 'Next'
        b['command'] = self.next
        b.pack({'side':'left'})
        self.b_next = b

        b = Button(self)
        b['text'] = 'Hist'
        b['command'] = self.hist
        b.pack({'side':'left'})
        self.b_hist = b
        
        return

    def hist(self):
        import ROOT
        if not self._canvas:
            self._canvas = ROOT.TCanvas('canvas','gaussian')
            self._histogram = ROOT.TH1D("gaussian","gaussian",200,-10,10)
            self._histogram.Draw()

            pass
        self._histogram.FillRandom("gaus")
        self._canvas.Modified()
        self._canvas.Update()
        return
    

    def drain(self):
        #print 'draining'
        self.app.drain_queue()
        self.after(100, self.drain)
        return

    def _next_cb(self,res):
        print 'Next event loaded'
        if res: print 'Result: %s'%str(res)
        return

    def next(self):
        if not self._nevents:
            self.app.shutdown()
            self.quit()
        self._nevents -= 1
        self.app.run(self._next_cb,1)
        return

    pass

def start(app):
    import async
    tkroot = Tk()
    tkapp = Main(async.AsyncInterface(app),master=tkroot)
    tkapp.after(0, tkapp.drain)
    tkapp.mainloop()
    tkroot.destroy()

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