/usr/share/pyshared/lightblue/_discoveryui.py is in python-lightblue 0.3.2-1ubuntu3.
This file is owned by root:root, with mode 0o644.
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#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
try:
from Tkinter import *
except ImportError, e:
raise ImportError("Error loading GUIs for selectdevice() and selectservice(), Tkinter not found: " + str(e))
# Provides services for controlling a listbox, tracking selections, etc.
class ListboxController(object):
def __init__(self, listbox, cb_chosen):
"""
Arguments:
- cb_chosen: called when a listbox item is chosen -- i.e. when
an item is double-clicked or the <Return> key is pressed while
an item is selected.
"""
self.setlistbox(listbox)
self.cb_chosen = cb_chosen
self.__alarmIDs = {}
def setlistbox(self, listbox):
self.listbox = listbox
self.listbox.bind("<Double-Button-1>", lambda evt: self._chosen())
self.listbox.bind("<Return>", lambda evt: lambda evt: self._chosen())
# adds an item to the list
def add(self, *items):
for item in items:
self.listbox.insert(END, item)
# clears items in listbox & refreshes UI
def clear(self):
self.listbox.delete(0, END)
# selects an item in the list.
# pass index=None to deselect.
def select(self, index):
self._deselect()
if index is not None:
self.listbox.selection_set(index)
self.listbox.focus()
def _deselect(self):
selected = self.selectedindex()
if selected != -1:
self.listbox.selection_clear(selected)
def selectedindex(self):
sel = self.listbox.curselection()
if len(sel) > 0:
return int(sel[0])
return -1
# starts polling the listbox for a user selection and calls cb_selected
# when an item is selected.
def track(self, cb_selected, interval=100):
self._track(interval, -1, cb_selected)
def _track(self, interval, lastindex, callback):
index = self.selectedindex()
if index != -1 and index != lastindex:
callback(index)
# recursively keep tracking
self.__alarmIDs[id(self.listbox)] = self.listbox.after(
interval, self._track, interval, index, callback)
def stoptracking(self):
for x in self.__alarmIDs.values():
self.listbox.after_cancel(x)
def focus(self):
self.listbox.focus()
def update(self):
self.listbox.update()
# called when a selection has been chosen (i.e. pressed return / dbl-click)
def _chosen(self):
index = self.selectedindex()
if index != -1:
self.cb_chosen(index)
# A frame which contains a listbox and has a title above the listbox.
class StandardListboxFrame(Frame):
def __init__(self, parent, title, boxwidth=28):
Frame.__init__(self, parent)
self.pack()
self.buildUI(parent, title, boxwidth)
def buildUI(self, parent, title, boxwidth):
bigframe = Frame(parent)
bigframe.pack(side=LEFT, fill=BOTH, expand=1)
self.titlelabel = Label(bigframe, text=title)
self.titlelabel.pack(side=TOP)
mainframe = Frame(bigframe, bd=1, relief=SUNKEN)
mainframe.pack(side=BOTTOM, fill=BOTH, expand=1)
scrollbar = Scrollbar(mainframe)
scrollbar.pack(side=RIGHT, fill=Y)
self.listbox = Listbox(mainframe, bd=1, exportselection=0)
self.listbox.pack(fill=BOTH, expand=1)
self.listbox.config(background="white", width=boxwidth)
# attach listbox to scrollbar
self.listbox.config(yscrollcommand=scrollbar.set)
scrollbar.config(command=self.listbox.yview)
def settitle(self, title):
self.titlelabel.config(text=title)
class StatusBar(object):
def __init__(self, parent, side=TOP, text=""):
self.label = Label(parent, text=text, bd=0, pady=8)
self.label.pack(side=side, fill=BOTH, expand=1)
def settext(self, text):
self.label.config(text=text)
# makes UI with top pane, status bar below top pane, and bottom pane.
# Probably should use a grid geometry manager instead, might be easier.
class LayoutFrame(Frame):
def __init__(self, parent):
Frame.__init__(self, parent, padx=10, pady=5) # inner padding
self.topframe = Frame(self)
self.topframe.pack(side=TOP, fill=BOTH, expand=1)
self.statusbar = StatusBar(self)
self.lineframe = Frame(self, height=1, bg="#999999")
self.lineframe.pack(side=TOP, fill=BOTH, expand=1)
self.bottomframe = Frame(self, pady=5)
self.bottomframe.pack(side=BOTTOM, fill=BOTH, expand=1)
# Abstract class for controlling and tracking selections for a listbox.
class ItemSelectionController(object):
def __init__(self, listbox, cb_chosen):
self.cb_chosen = cb_chosen
self._controller = ListboxController(listbox, self._chosen)
self._closed = False
def getselection(self):
index = self._controller.selectedindex()
if index != -1:
return self._getitem(index)
return None
# set callback=None to switch off tracking
def trackselections(self, callback, interval=100):
if callback is not None:
self.cb_selected = callback
self._controller.track(self._selected, interval)
else:
self._controller.stoptracking()
def close(self):
self._controller.stoptracking()
self._closed = True
def closed(self):
return self._closed
# called when an item is chosen (e.g. dbl-clicked, not just selected)
def _chosen(self, index):
if self.cb_chosen:
self.cb_chosen(self._getitem(index))
def _selected(self, index):
if self.cb_selected:
self.cb_selected(self._getitem(index))
# move focus to this listbox
self._controller.focus()
def getitemcount(self):
raise NotImplementedError
def _getitem(self, index):
raise NotImplementedError
class DeviceSelectionController(ItemSelectionController):
# keep cache across instances (and across different sessions)
_cache = []
def __init__(self, listbox, cb_chosen):
super(DeviceSelectionController, self).__init__(listbox, cb_chosen)
self._discoverer = None
self.__items = []
self._loadcache()
def close(self):
self._stopdiscovery()
DeviceSelectionController._cache = self.__items[:]
super(DeviceSelectionController, self).close()
def refreshdevices(self):
self.__items = []
self._controller.clear()
self._controller.update()
self._stopdiscovery()
self._discoverer = _DeviceDiscoverer(self._founddevice, None)
self._discoverer.find_devices(duration=10)
#self._test("device", 0, 5)
def _additem(self, deviceinfo):
self.__items.append(deviceinfo)
self._controller.add(deviceinfo[1]) # add name
def getitemcount(self):
return len(self.__items)
def _getitem(self, index):
return self.__items[index]
def _founddevice(self, address, deviceclass, name):
self._additem((address, name, deviceclass))
# push updates to ensure names are progressively added to the display
self._controller.listbox.update()
def _loadcache(self):
for item in DeviceSelectionController._cache:
self._additem(item)
def _stopdiscovery(self):
if self._discoverer is not None:
self._discoverer.cancel_inquiry()
def _test(self, desc, n, max):
import threading
if n < max:
dummy = ("00:00:00:00:00:"+str(n), "Device-" + str(n), 0)
self._additem(dummy)
threading.Timer(1.0, self._test, [desc, n+1, max]).start()
class ServiceSelectionController(ItemSelectionController):
def __init__(self, listbox, cb_chosen):
super(ServiceSelectionController, self).__init__(listbox, cb_chosen)
self.__items = []
# keep cache for each session (i.e. each time window is opened)
self._sessioncache = {}
def _additem(self, service):
self.__items.append(service)
self._controller.add(self._getservicedesc(service))
def getitemcount(self):
return len(self.__items)
# show services for given device address
# pass address=None to clear display
def showservices(self, address):
self.__items = []
self._controller.clear()
if address is None: return
services = self._sessioncache.get(address)
if not services:
import lightblue
services = lightblue.findservices(address)
#services = [("", 1, "one"), ("", 2, "two"), ("", 3, "three")]
self._sessioncache[address] = services
if len(services) > 0:
for service in services:
self._additem(service)
def _getitem(self, index):
return self.__items[index]
def _getservicedesc(self, service):
address, port, name = service
return "(%s) %s" % (str(port), name)
class DeviceSelector(Frame):
title = "Select Bluetooth device"
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.pack()
self._buildUI()
self._selection = None
self._closed = False
self.master.bind("<Escape>", lambda evt: self._clickedcancel())
def _buildUI(self):
mainframe = LayoutFrame(self)
mainframe.pack()
self._statusbar = mainframe.statusbar
self._buildlistdisplay(mainframe.topframe)
self._buildbuttons(mainframe.bottomframe)
def _buildlistdisplay(self, parent):
self.devicesframe = StandardListboxFrame(parent, "Devices",
boxwidth=38)
self.devicesframe.pack(side=LEFT, fill=BOTH, expand=1)
self._devicemanager = DeviceSelectionController(
self.devicesframe.listbox, self._chosedevice)
def _buildbuttons(self, parent):
self._searchbutton = Button(parent, text="Search for devices",
command=self._clickedsearch)
self._searchbutton.pack(side=LEFT)
self._selectbutton = Button(parent, text="Select",
command=self._clickedselect)
self._selectbutton.pack(side=RIGHT)
self._selectbutton.config(state=DISABLED)
self._cancelbutton = Button(parent, text="Cancel",
command=self._clickedcancel)
self._cancelbutton.pack(side=RIGHT)
def run(self):
try:
self._trackselections(True)
# run gui event loop
self.mainloop()
except Exception, e:
print "Warning: error during device selection:", e
def _trackselections(self, track):
if track:
self._devicemanager.trackselections(self._selecteddevice)
else:
self._devicemanager.trackselections(None)
def getresult(self):
return self._selection
def _selecteddevice(self, device):
self._selectbutton.config(state=NORMAL)
def _chosedevice(self, device):
self._clickedselect()
def _clickedsearch(self):
self._statusbar.settext("Searching for nearby devices...")
self._searchbutton.config(state=DISABLED)
self._selectbutton.config(state=DISABLED)
self.update()
self._devicemanager.refreshdevices()
if not self._closed:
self._statusbar.settext(
"Found %d devices." % self._devicemanager.getitemcount())
self._searchbutton.config(state=NORMAL)
def _clickedcancel(self):
self._quit()
def _clickedselect(self):
self._selection = self._devicemanager.getselection()
self._quit()
def _quit(self):
self._closed = True
self._devicemanager.close()
#Frame.quit(self) # doesn't close the window
self.master.destroy()
class ServiceSelector(DeviceSelector):
title = "Select Bluetooth service"
def _buildlistdisplay(self, parent):
self.devicesframe = StandardListboxFrame(parent, "Devices")
self.devicesframe.pack(side=LEFT, fill=BOTH, expand=1)
self._devicemanager = DeviceSelectionController(
self.devicesframe.listbox, self._pickeddevice)
# hack some space in between the 2 lists
spacerframe = Frame(parent, width=10)
spacerframe.pack(side=LEFT, fill=BOTH, expand=1)
self.servicesframe = StandardListboxFrame(parent, "Services")
self.servicesframe.pack(side=LEFT, fill=BOTH, expand=1)
self._servicemanager = ServiceSelectionController(
self.servicesframe.listbox, self._choseservice)
def _trackselections(self, track):
if track:
self._devicemanager.trackselections(self._pickeddevice)
self._servicemanager.trackselections(self._selectedservice)
else:
self._devicemanager.trackselections(None)
self._servicemanager.trackselections(None)
def _clearservices(self):
self.servicesframe.settitle("Services")
self._servicemanager.showservices(None) # clear services list
# called when a device is selected, or chosen
def _pickeddevice(self, deviceinfo):
self._clearservices()
self._statusbar.settext("Finding services for %s..." % deviceinfo[1])
self._selectbutton.config(state=DISABLED)
self._searchbutton.config(state=DISABLED)
self.update()
self._servicemanager.showservices(deviceinfo[0])
if not self._closed: # user might have clicked 'cancel'
self.servicesframe.settitle("%s's services" % deviceinfo[1])
self._statusbar.settext("Found %d services for %s." % (
self._servicemanager.getitemcount(),
deviceinfo[1]))
self._searchbutton.config(state=NORMAL)
def _selectedservice(self, service):
self._selectbutton.config(state=NORMAL)
def _choseservice(self, service):
self._clickedselect()
def _clickedsearch(self):
self._clearservices()
self._trackselections(False) # don't track selections while searching
# do the search
DeviceSelector._clickedsearch(self)
# re-enable selection tracking
if not self._closed:
self._trackselections(True)
def _clickedselect(self):
self._selection = self._servicemanager.getselection()
self._quit()
def _quit(self):
self._closed = True
self._devicemanager.close()
self._servicemanager.close()
self.master.destroy()
# -----------------------------------
import select
import bluetooth
class _DeviceDiscoverer(bluetooth.DeviceDiscoverer):
def __init__(self, cb_found, cb_complete):
bluetooth.DeviceDiscoverer.__init__(self) # old-style superclass
self.cb_found = cb_found
self.cb_complete = cb_complete
def find_devices(self, lookup_names=True, duration=8, flush_cache=True):
bluetooth.DeviceDiscoverer.find_devices(self, lookup_names, duration, flush_cache)
# process until inquiry is complete
self._done = False
self._cancelled = False
while not self._done and not self._cancelled:
#print "Processed"
readfiles = [self,]
rfds = select.select(readfiles, [], [])[0]
if self in rfds:
self.process_event()
# cancel_inquiry() doesn't like getting stopped in the middle of
# process_event() maybe? so just use flag instead.
if self._cancelled:
bluetooth.DeviceDiscoverer.cancel_inquiry(self)
def cancel_inquiry(self):
self._cancelled = True
def device_discovered(self, address, deviceclass, name):
#print "device_discovered", address, deviceclass, name
if self.cb_found:
self.cb_found(address, deviceclass, name)
def inquiry_complete(self):
#print "inquiry_complete"
self._done = True
if self.cb_complete:
self.cb_complete()
# -----------------------------------
# Centres a tkinter window
def centrewindow(win):
win.update_idletasks()
xmax = win.winfo_screenwidth()
ymax = win.winfo_screenheight()
x0 = (xmax - win.winfo_reqwidth()) / 2
y0 = (ymax - win.winfo_reqheight()) / 2
win.geometry("+%d+%d" % (x0, y0))
def setupwin(rootwin, title):
# set window title
rootwin.title(title)
# place window at centre
rootwin.after_idle(centrewindow, rootwin)
rootwin.update()
# -----------------------------------
def selectdevice():
rootwin = Tk()
selector = DeviceSelector(rootwin)
setupwin(rootwin, DeviceSelector.title)
selector.run()
return selector.getresult()
def selectservice():
rootwin = Tk()
selector = ServiceSelector(rootwin)
setupwin(rootwin, ServiceSelector.title)
selector.run()
return selector.getresult()
if __name__ == "__main__":
print selectservice()
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