def getfiles():
		files = tkFileDialog.askopenfilenames(parent=root,title='Choose image stack files')
		if not files: return
		filenames = []
		for fname in files:
			filenames.append(os.path.split(fname)[1])
		if len(files) > 10:
			filenames = filenames[0:10]
			filenames.append("...")
		ss_in = tkSimpleDialog.askfloat(
			parent=root, title='Enter ORIGINAL focus step size',
			prompt='Enter ORIGINAL focus step size for:\n'+'\n'.join('{}'.format(k) for k in filenames))
		if not ss_in: return
		pixelsize = pxSize(files[0])
		if pixelsize is None: pixelsize = 0
		ss_out = tkSimpleDialog.askfloat(
			parent=root, title='Enter INTERPOLATED focus step size',
			prompt='Enter INTERPOLATED focus step size for:\n'+'\n'.join('{}'.format(k) for k in filenames), initialvalue=pixelsize*1000)
		if not ss_out: return
		print "Selected files: {0}\n".format(files), "\n", "Focus step size in: {0} | out: {1}\n".format(ss_in,ss_out),\
			"Interpolation method: {0}\n".format(int_method.get())
		for filename in files:
			main(filename,ss_in, ss_out, saveorigstack=False, interpolationmethod=int_method.get(), showgraph=bool(showgraph.get()))
		print "Finished interpolation."
		print "="*40

def ask_float(prompt, default=None, min=0.0,max=100.0, title=''):
	""" Get input from the user, validated to be an float (decimal number). default refers to the value which is initially in the field. By default, from 0.0 to 100.0; change this by setting max and min. Returns None on cancel."""
	import tkSimpleDialog
	if default:
		return tkSimpleDialog.askfloat(title, prompt, minvalue=min, maxvalue=max, initialvalue=default)
	else:
		return tkSimpleDialog.askfloat(title, prompt, minvalue=min, maxvalue=max)

    def gui_addfigure(self,ll_lat=None,ll_lon=None,ur_lat=None,ur_lon=None):
        'GUI handler for adding figures forecast maps to basemap plot'
        import tkSimpleDialog
        try:
            from scipy.misc import imread
            import PIL
            filename = self.gui_file_select(ext='.png',ftype=[('All files','*.*'),
                                                          ('PNG','*.png'),
							  ('JPEG','*.jpg'),
							  ('GIF','*.gif')])
            if not filename:
                print 'Cancelled, no file selected'
                return
            print 'Opening png File: %s' %filename
            img = imread(filename)
        except:
            import tkMessageBox
            tkMessageBox.showwarning('Sorry','Error occurred unable to load file')
            return
	# get the corners
	if not ll_lat:
	    ll_lat = tkSimpleDialog.askfloat('Lower left lat','Lower left lat? [deg]')
	    ll_lon = tkSimpleDialog.askfloat('Lower left lon','Lower left lon? [deg]')
	    ur_lat = tkSimpleDialog.askfloat('Upper right lat','Upper right lat? [deg]')
	    ur_lon = tkSimpleDialog.askfloat('Upper right lon','Upper right lon? [deg]')
	self.line.addfigure_under(img,ll_lat,ll_lon,ur_lat,ur_lon)

 def addIso(self):
   isovalue=tkSimpleDialog.askfloat("Isosurface Level","What function value should the isosurface be at?")
   isocolor = tkColorChooser.askcolor(title="Isosurface Color")
   isoopacity = tkSimpleDialog.askfloat("Isosurface Opacity","What opacity should the isosurface have? 0 = transparent.")
   surf = isosurface(self.reader.GetOutputPort(),isovalue,isocolor[0][0],isocolor[0][1],isocolor[0][2],isoopacity) 
   self.isosurfaces.append(surf)
   self.isolist.insert(Tkinter.END,str(surf))
   self.ren.AddActor(surf.actor)

 def editIso(self,i):
   isovalue=tkSimpleDialog.askfloat("Isosurface Level","What function value should the isosurface be at?",initialvalue=self.isosurfaces[i].value)
   isocolor = tkColorChooser.askcolor(initialcolor=(self.isosurfaces[i].R,self.isosurfaces[i].G,self.isosurfaces[i].B),title="Isosurface Color")
   isoopacity = tkSimpleDialog.askfloat("Isosurface Opacity","What opacity should the isosurface have? 0 = transparent.",initialvalue=self.isosurfaces[i].opacity)
   surf = isosurface(self.reader.GetOutputPort(),isovalue,isocolor[0][0],isocolor[0][1],isocolor[0][2],isoopacity)
   self.delIso(i)
   self.isosurfaces.append(surf)
   self.isolist.insert(Tkinter.END,str(surf))
   self.ren.AddActor(surf.actor)

 def get_weight(self):
     """Get weight from scale or if not connected from dialog"""
     if self.scale is None: 
         weight = tkSimpleDialog.askfloat("Weight Entry", "Weight (lbs):")
     else:
         try:
             weight = self.scale.get_weight()
         except ScaleError.ScaleError:
             print "Error reading scale, enter weight manually"
             weight = tkSimpleDialog.askfloat("Weight Entry", "Weight (lbs):")
     return weight

    def getCountRateHist(self):
        '''Plots a histogram of the count rate.  The number of bins is 
        for the histogram, and the sample length is how long the count rate
        is averaged over (equivalent to "sample length" for the count rate
        vs. time graph.'''

        #check if data has been imported. if not, give a warning
        if self.dataSet:

            #ask for number of bins for histogram
            labelText = "Enter the number of bins"
            numBins = tksd.askinteger("Count Rate Histogram", labelText, parent=self.root, minvalue=1)
            if not numBins:
                return

            #ask for length of sample to calculate count rate
            labelText = "Enter the sample length (seconds)"
            sampleLength = tksd.askfloat("Sample Length", labelText, parent=self.root, minvalue=0)
            if not sampleLength:
                return

            #plot histogram in matplotlib
            pd.plotHistOfCountRates(self.dataSet, sampleLength, numBins)

        else:
            self.showImportAlert()

def go():

    
    root = Tk()
    name_list = DisplaySpectrum(root)
    
    if name_list !='':
        normalize = True
        if normalize == True:
            kNorm = tkSimpleDialog.askfloat('normalization constant', 'norms')
            if kNorm == '':
                kNorm = 1
        else:
            kNorm = 1
               
        view_only = False
        if view_only:
            ConsolidateFiles(name_list, smooth = False)
            i = 5
            plot(arange(2800,3605,5),x[1], 'ks')
        
            plot(arange(2800,3605,5),SG_Smooth(x[1], width = 11,plot = False))
        else:
            
            ConsolidateFiles(name_list, smooth = True)
            SaveSpectrum(root, name_list, x)
    root.destroy()
    
    
    
    root.mainloop()   
    return None

def align_images(im1, im2):

	# Convert images to grayscale
	im1_gray = cv2.cvtColor(im1,cv2.COLOR_BGR2GRAY)
	im2_gray = cv2.cvtColor(im2,cv2.COLOR_BGR2GRAY)
 
	# Find size of image1
	sz = im1.shape

	# Define the motion model
	warp_mode = cv2.MOTION_HOMOGRAPHY
	
	#Define the warp matrix
	warp_matrix = np.eye(3, 3, dtype=np.float32)

	#Define the number of iterations
	number_of_iterations = askinteger("Iterations", "Enter a number between 5 andd 5000",initialvalue=500,minvalue=5,maxvalue=5000)

	#Define correllation coefficient threshold
	#Specify the threshold of the increment in the correlation coefficient between two iterations
	termination_eps = askfloat("Threshold", "Enter a number between 1e-10 and 1e-50",initialvalue=1e-10,minvalue=1e-50,maxvalue=1e-10)

	#Define termination criteria
	criteria = (cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT, number_of_iterations,  termination_eps)
 
	#Run the ECC algorithm. The results are stored in warp_matrix.
	(cc, warp_matrix) = cv2.findTransformECC (im1_gray,im2_gray,warp_matrix, warp_mode, criteria)

	#Use warpPerspective for Homography 
	im_aligned = cv2.warpPerspective (im2, warp_matrix, (sz[1],sz[0]), flags=cv2.INTER_LINEAR + cv2.WARP_INVERSE_MAP)
	
	save1 = asksaveasfilename(defaultextension=".jpg", title="Save aligned image")
	cv2.imwrite(save1,im_aligned)

def demagnetize():
	max_field = float(F1.get())
	steps = int(F2.get())
	kepcoInit()

	while (field2curr(max_field) >= 3.0):
		max_field = tkSimpleDialog.askfloat('MAGNET OVERLOAD','Choose a new value for the field or decrease the gap!')
	step_field = max_field/(steps+1)
	list_fields = r_[max_field:step_field/2-step_field/10:-step_field]

	for my_field in list_fields:
		my_write_curr = field2curr(my_field)
		kepco.write("CURR %f"%(my_write_curr))
		#print "FIELD++ = ",my_val
		time.sleep(0.2)
		my_read_curr = float(kepco.ask("MEAS:CURR?"))
		my_read_field = curr2field(my_read_curr)
		print "MEASURED FIELD:  ",my_read_field
		my_back_field = my_field-step_field/2
		my_back_write_curr = field2curr(my_back_field)
		kepco.write("CURR %f"%(-my_back_write_curr))
		#print "FIELD-- = ",-my_val_back
		time.sleep(0.2)
		my_read_curr = float(kepco.ask("MEAS:CURR?"))
		my_read_field = curr2field(my_read_curr)
		print "MEASURED FIELD:  ",my_read_field
	kepco.write("CURR 0.0")
	kepco.write("OUTP OFF")
	print "sample demagnetized!"
	del my_write_curr
	del my_read_curr
	del my_read_field
	del my_field

def popup(which, message, title=None):
    """Displays A Pop-Up Message."""
    if title is None:
        title = which
    which = superformat(which)
    if which == "info":
        return tkMessageBox.showinfo(str(title), str(message))
    elif which == "warning":
        return tkMessageBox.showwarning(str(title), str(message))
    elif which == "error":
        return tkMessageBox.showerror(str(title), str(message))
    elif which == "question":
        return tkMessageBox.askquestion(str(title), str(message))
    elif which == "proceed":
        return tkMessageBox.askokcancel(str(title), str(message))
    elif which == "yesorno":
        return tkMessageBox.askyesno(str(title), str(message))
    elif which == "retry":
        return tkMessageBox.askretrycancel(str(title), str(message))
    elif which == "entry":
        return tkSimpleDialog.askstring(str(title), str(message))
    elif which == "integer":
        return tkSimpleDialog.askinteger(str(title), str(message))
    elif which == "float":
        return tkSimpleDialog.askfloat(str(title), str(message))

 def setOffset(self):
     newOffset = askfloat(parent = self.interior(),
                          title = self['text'],
                          prompt = 'Start offset (seconds):')
     if newOffset != None:
         self.offset = newOffset
         self.updateDisplay()

def update_integration_time():
    cur_itime = server.get_integration_time()
    itime = askfloat('Set integration time', 'Seconds: ', parent=root, initialvalue=cur_itime)
    if itime:
        server.stop_correlator()
        server.set_integration_time(itime)
        server.start_correlator()

	def askstr(self, f):
		theta=tkSimpleDialog.askfloat("test askinteger", "deg",)
		if f=="sin":
			data=str(math.sin(math.radians(theta)))
		if f=="cos":
			data=str(math.cos(math.radians(theta)))
		self.set(data)

 def change_cart_amount(self, cart_row):
     """Change the amount of a product entry in a cart"""
     print 'Changing amount of item in cart'
     self.simple_lock()
     if self.cart[cart_row].product.is_by_weight:
         amount = tkSimpleDialog.askfloat("Enter new weight", "Weight:")
     elif self.cart[cart_row].product.is_premarked:
         amount = tkSimpleDialog.askfloat("Enter new amount", "Amount:")
     else:
         amount = tkSimpleDialog.askinteger("Enter new amount", "Amount:")
     self.simple_unlock()
         
     if amount is None:
         print "Canceled"
     elif amount == 0:
         print "Can't update amount to 0, use delete key instead"
     else:
         print "Updated amount " + str(amount)
         self.cart[cart_row].change_amount(amount)
     self.update_cart()

 def count(self, *args):
     # TODO: implement a proper register count
     # TODO: add dialog box telling how register count went
     count = askfloat(title="Enter register count", prompt="Register count")
     if count is not None:
         try:
             self.register.count_register(count)
         except CredentialException:
             self.logger.warning("insufficient privileges to count " +
                                 "register")
     # Put focus in barcode field
     self.barcode_field.focus()

 def adjust(self, *args):
     amount = askfloat(title="Enter adjustment amount",
                       prompt="Adjustment amount")
     if amount is not None:
         try:
             self.register.adjust(amount)
         except CredentialException:
             self.logger.warning("insufficient privileges to adjust " +
                                 "register count")
         except ValueError as e:
             self.logger.warning("invalid adjustment amount: " + e)
     # Put focus in barcode field
     self.barcode_field.focus()

 def set_time(self):
     """
     Gets user input from a dialog and updates
     self.default_time according to it
     """
     try:
         self.default_time = tkSimpleDialog.askfloat(
             'Set time',
             'Specify the time (in minutes)',
             parent=self.top
         )
         self.reset()
     except TypeError:
         pass

	def getdirint():
		directory = tkFileDialog.askdirectory(parent=root,title='Choose directory with image sequence stack files')
		if not directory: return
		ss_in = tkSimpleDialog.askfloat(
			parent=root, title='Enter ORIGINAL focus step size',
			prompt='Enter ORIGINAL focus step size for:\n{0}'.format(os.path.split(directory)[1]))
		if not ss_in: return
		try:
			pixelsize = pxSize(os.path.join(directory,'Tile_001-001-000_0-000.tif'))
			if pixelsize is None: pixelsize = 0
		except:
			pixelsize = 0
			pass
		ss_out = tkSimpleDialog.askfloat(
			parent=root, title='Enter INTERPOLATED focus step size',
			prompt='Enter INTERPOLATED focus step size for:\n{0}'.format(os.path.split(directory)[1]), initialvalue=pixelsize*1000)
		if not ss_out: return
		saveorigstack = tkMessageBox.askyesno("Save single stack file option", "Do you also want to save single stack file with original focus step size?")
		print "directory: {0}\n".format(directory), "Focus step size in: {0} | out: {1}\n".format(ss_in,ss_out),\
			"Also save single stack file for original spacing?: {0}\n".format(saveorigstack), "Interpolation method: {0}\n".format(int_method.get())
		main(directory,ss_in, ss_out, saveorigstack=saveorigstack, interpolationmethod=int_method.get(), showgraph=bool(showgraph.get()))
		print "Finished interpolation."
		print "="*40

def addResistorToGrid(x,y):
    canvas.data.clickedResistor = x,y
    canvas.data.draggingResistor = False
    rPrompt = ("Resistance Entry","Enter resistance in Ohms")
    resistance = 0
    while resistance <= 0:
        resistance = tkSimpleDialog.askfloat(rPrompt[0],rPrompt[1])
        # If the user cancels the resistance selection, the resistor disappears
        # and is not added to the circuit
        if resistance == None:
            canvas.data.clickedResistor = -50,-50
            break
    if resistance != None:
        b = Resistor((x-40,y),(x + 40,y), resistance)
        canvas.data.circuit.addElement(b)