Touch_UI.py

import logging
import signal
import sys
import threading
import time
import os
import prctl
import RPi.GPIO as GPIO
from smbus import SMBus

import numpy as np

from subprocess import Popen, PIPE, check_output

import pwnagotchi.plugins as plugins
from pwnagotchi.ui.components import *
from pwnagotchi.ui.view import BLACK
import pwnagotchi.ui.fonts as fonts

class Touch_Button(Widget):
    def __init__(self, position=(0,0,30,30), color='White', *,
                 state=False, momentary=False, reverse=False,
                 text=None, value=None, text_color="Black", font=None, image=None,
                 shadow='Black', highlight='White', outline = None,
                 alt_text=None, alt_text_color=None, alt_font=None, alt_image=None, alt_color=None,
                 event_handler=None):

        super().__init__(position, color)
        self.event_handler = event_handler   # callback events, press, release
        self.xy = position
        self.color = color
        self.state = state            # False=off, True=on
        self.momentary = momentary    # False = toggle on/off, True  = on while pressed, off on release (single action)
        self.reverse = reverse        # if True, then default state is True, and alt state is False

        self.shadow = shadow          # on "falling" sides of button
        self.highlight = highlight    # on "rising" sides of button
        self.outline = outline        # outer ring of button, drawn last

        self.text = text              # text label
        self.value = value            # default value (if set, displayed under text)
        self.text_color = text_color  # default text_color
        self.font = font              # default font (None)
        if image:
            try:
                self.image = Image.open(image)
            except Exception as e:
                logging.warn("Image %s error: %s" % (image, repr(e)))
                self.image = None
        else:
            self.image = None            # default image (None)

        # alternate display items for pressed state
        self.alt_color = alt_color
        self.alt_text_color = alt_text_color if alt_text_color else text_color
        self.alt_text = alt_text
        self.alt_font = alt_font if alt_font else font
        if alt_image:
            try:
                self.alt_image = Image.open(alt_image)
            except Exception as e:
                logging.warn("Image %s error: %s" % (alt_image, repr(e)))
                self.alt_image = None
        else:
            self.alt_image = None            # default image (None)

    def draw(self, canvas, drawer):
        try:
            pressed = self.state != self.reverse
            xy = np.array(self.xy)

            # draw button highlight and shadow
            if pressed:
                upper = list(np.add(xy, np.array([-1,-1,0,0])))
                drawer.rectangle(upper, fill=self.highlight)
            else:
                lower = list(np.add(xy, np.array([2,2,1,1])))
                drawer.rectangle(lower, fill=self.shadow)
                xy = np.add(xy, np.array([-1,-1,-1,-1]))

            # draw button background
            color = self.alt_color if pressed and self.alt_color else self.color
            drawer.rectangle(list(xy), fill = color, outline=self.outline)

            image = self.alt_image if pressed and self.alt_image else self.image
            if (image):
                canvas.paste(image, list(xy))

            text = self.alt_text if pressed and self.alt_text else self.text

            value = self.value

            if value:
                if text:
                    text = "%s\n%s" % (text, value)
                else:
                    text = "%s" % value

            text_color = self.alt_text_color if pressed else self.text_color
            text_font = self.alt_font if pressed else self.font

            if text:
                textpos = ((xy[0]+xy[2])/2, (xy[1]+xy[3])/2+1)
                drawer.text(textpos, text, anchor="mm", fill=text_color, font=text_font, align="center")

            #if self.outline:
            #    drawer.rectangle(list(np.add(xy, np.array([-1,-1,1,1]))), outline = self.outline)

        except Exception as e:
            logging(repr(e))


class gt1151_touchscreen:
    def __init__(self, config):
        try:
            self.config = config

            # epaper pins
            self.EPD_RST_PIN = config.get("EPD_RST_PIN", 17)
            self.EPD_DC_PIN = config.get("EPD_DC_PIN", 25)
            self.EPD_CS_PIN = config.get("EPD_CS_PIN", 8)
            self.EPD_BUSY_PIN = config.get("EPD_BUSY_PIN", 24)

            # touchscreen pins
            self.TRST = config.get("reset_pin", 22)
            self.INT = config.get("int_pin", 27)
            self.bus = SMBus(config.get("i2c_bus", 1))
            self.address = config.get("i2c_addr", 0x14)

            GPIO.setmode(GPIO.BCM)
            GPIO.setwarnings(True)
            GPIO.setup(self.TRST, GPIO.OUT)
            GPIO.setup(self.INT, GPIO.IN)

            # touch screen state
            self.Touching = False
            self.TouchCount = 0
            self.touches = {}
            self.X = [0, 1, 2, 3, 4]
            self.Y = [0, 1, 2, 3, 4]
            self.S = [0, 1, 2, 3, 4]

            logging.info("GT1151: RST %s INT %s address 0x%x bus %s" % (self.TRST, self.INT, self.address, config.get("i2c_bus", 1)))
        except Exception as e:
            logging.exception(e)

    def digital_write(self, pin, value):
        GPIO.output(pin, value)

    def digital_read(self, pin):
        return GPIO.input(pin)

    def delay_ms(self, delaytime):
        time.sleep(delaytime / 1000.0)

    def spi_writebyte(self, data):
        spi.writebytes(data)

    def spi_writebyte2(self, data):
        spi.writebytes2(data)

    def i2c_writebyte(self, reg, value):
        self.bus.write_word_data(self.address, (reg>>8) & 0xff, (reg & 0xff) | ((value & 0xff) << 8))

    def i2c_write(self, reg):
        logging.debug("Address = %s" % self.address)
        self.bus.write_byte_data(self.address, (reg>>8) & 0xff, reg & 0xff)

    def i2c_readbyte(self, reg, len):
        self.i2c_write(reg)
        rbuf = []
        for i in range(len):
            rbuf.append(int(self.bus.read_byte(self.address)))
        return rbuf

    def module_init(self):
        GPIO.setmode(GPIO.BCM)
        GPIO.setwarnings(False)
        GPIO.setup(self.TRST, GPIO.OUT)
        GPIO.setup(self.INT, GPIO.IN)

        return 0

    def reset(self):
        self.digital_write(self.TRST, 1)
        self.delay_ms(100)
        self.digital_write(self.TRST, 0)
        self.delay_ms(100)
        self.digital_write(self.TRST, 1)
        self.delay_ms(100)
        buf = self.i2c_readbyte(0x8140, 4)
        logging.info("Version: %s" % repr(buf))
        
    
    def touchscan(self):
      try:
        buf = self.i2c_readbyte(0x814E, 1)
        touching = (buf[0]&0x80 != 0x00)
        if not touching:
            logging.info("not touching %s" % buf)
            self.delay_ms(10)
        else:
            touchCount = buf[0] & 0x0f
            logging.debug("**** touching %s %d" % (buf, touchCount))
            buf = self.i2c_readbyte(0x814F, touchCount * 8)
            self.i2c_writebyte(0x814E, 0)

            logging.debug("Read: %s" % repr(buf))
            touches = {}
            for t in range(touchCount):
                touchid = buf[0 + 8 * t]
                x = (buf[2 + 8*t] << 8) + buf[1 + 8*t]
                y = (buf[4 + 8*t] << 8) + buf[3 + 8*t]
                s = (buf[6 + 8*t] << 8) + buf[5 + 8*t]
                if t not in self.touches:
                    logging.info("Touching %s: %s, %s, %s" % (touchid, x, y, s))
                
                touches[touchid] = {'x': x,
                                    'y': y,
                                    's': s }
            for t in self.touches:
                touch = self.touches[t]
                if t not in touches:
                    if touch['s'] > 0:   # process once more as 0 for release
                        touch['s'] = 0
                        touches[t] = touch
                        logging.debug("### Release track %s, pos %s, %s" % (t,
                                                                           touch['x'],
                                                                           touch['y']))
            self.touches = touches
            
        return self.touches
      except Exception as e:
          logging.exception(e)

    def module_exit(self):
        self.bus.close()
        GPIO.output(self.TRST, 0)
        time.sleep(0.1)
        GPIO.output(self.TRST, 1)

        #GPIO.cleanup()
        logging.info("GT1151 closed")

def singleton(cls, *args, **kw):
    instances = {}
    def _singleton(*args, **kw):
        if cls not in instances:
            instances[cls] = cls(*args, **kw)
        return instances[cls]
    return _singleton

@singleton
class Touch_Screen(plugins.Plugin):
    __author__ = 'Sniffleupagus'
    __version__ = '1.0.0'
    __license__ = 'GPL3'
    __description__ = 'Use touchscreen input to toggle settings.'

    # Touch screen support
    #
    # uses system touchscreens in /dev/input/event*
    #
    # Requires tslib and evtest:
    #
    #  % sudo apt install evtest libts-bin
    #
    # Tested with Waveshare Touch 2.13 E-paper HAT
    # - add to /boot/config.txt:  dtoverlay=goodix,interrupt=27,reset=22
    # - pwnagotchi display is "waveshare_v3"
    #
    # Tested with Inland 3.5" TFT touchscreen, 26-pin connector
    # - install https://github.com/goodtft/LCD-show
    #
    #
    #
    # plugins that want to receive touch events can implement these callback functions:
    #
    ## on_touch_ready(self, touchscreen)
    #
    # - called when the touchscreen has been started. Your plugin can use it to know the touchscreen
    #   is available.
    #
    ## on_touch_press(self, ts, ui, ui_element, touch_data)
    ## on_touch_release(self, ts, ui, ui_element, touch_data)
    #
    # # simplified button-like interface. on_touch_press is the initial touch,
    # # then supress all the wiggling, and on_touchs_release is the "0" when
    # # your finger comes off the screen. Much more efficient, if you are just pressing
    # # something to do an action
    #
    ## on_touch_move(self, ts, ui, ui_element, touch_data)
    #
    # # This will get every position update between the press and release (every finger wiggle).
    # # alsmost raw touchscreen access. This does not get called for the press or release, just
    # # all the in-betweens.
    #
    # # variables:
    #
    #   self = your plugin instance
    #
    #   ts, touchscreen = this touchscreen plugin instance
    #
    #   ui = pwnagotchi view/ui like in other plugin handlers
    #
    #   ui_element = name of display element where touch occurred. NOT IMPLEMENTED YET!!!!!
    #
    #   touch_data = { point: [x,y], pressure: p }
    #     x,y = point of touch
    #     p = 1-255 how hard being pressed
    #         0 when released
    #
    #
    # Future improvements:
    #
    # - make an array called Touch_Elements listing the UI elements of interest
    #
    # self.Touch_Elements = [ "face", "uptime", "assoc_count", "deauth_count" ]
    #
    # if a touch event occurs inside a ui_element in a plugin's Touch_Elements array,
    # on_touch* will get called (to all plugins implementing it, so check the element before blindly
    # processing a touch

    # - if user has buttons available, one can be assigned "next" to cycle through the touchable areas, highlighting
    # the current one with a box or something. If another button assigned to "ok"  is pressed, it is considered
    # a touch event on the selected item, and a touch release (0) event when the button is released. "prev" to cycle
    # backwares and "back" (just dismisses highlighting the selected element for now) are also implemented for UI
    # navigation.
    # - web_ui to add/remove UI elements from button cycling

    
    def __init__(self):
        self.running = False
        self._ts_thread = None       # ts_print thread
        self.keepGoing = False       # let the ts_print thread know to stop going when we exit
        self._view = None            # pwnagotchi view/ui/display
        self._agent = None           # pwnagotchi agent
        self._beingTouched = False   # currently being touched or not
        self._ui_elements = []       # keep track of UI elements created in on_ui_setup for easy removal in on_unload

        self.touchscreen = None      # ts_print external process

        self.touch_elements = {}     # ui elements of interest for touch events

        self.needsAptPackages = None

        # use buttons to cycle through user elements
        # web_ui to select which ones to include or not include
        self.buttonCurrentZone = None

        logging.basicConfig(format='%(asctime)-15s %(levelname)s [%(filename)s:%(lineno)d] %(funcName)s: %(message)s')

        logging.debug("plugin created")

    def touchScreenHandler(self, ts_device=None):
        try:
            prctl.set_name("TS Loop")
            if self.options.get("ts_type", None) == "ts_print":
                # try to find a touchscreen device
                evtest = Popen(("/usr/bin/evtest"), stdout=PIPE, stderr=PIPE,
                               universal_newlines=True)
                if not evtest:
                    self.needsAptPackages = ['evtest', 'libts-bin']

                while True:
                    output = str(evtest.stderr.readline())
                    if not output:
                        break
                    output.rstrip('\n')
                    logging.info("Looking for screen: %s" % repr(output))
                    try:
                        if "touchscreen" in output.lower():
                            (ts_device, rest) = output.split(':', 2)
                            ts_device = str(ts_device)
                            logging.info("Found touchscreen device %s" % ts_device)
                            break
                    except Exception as e:
                        logging.error(repr(e))

                self.keepGoing = True
                while ts_device and self.keepGoing:
                    cmd = "/usr/bin/ts_print"
                    os.environ["TSLIB_TSDEVICE"] = "%s" % ts_device
                    self.touchscreen = Popen(['stdbuf', '-o0', cmd], env=os.environ, stdout=PIPE, universal_newlines=True, shell=False) if not self.needsAptPackages else None

                    if self.touchscreen:
                        logging.info("ts_print running")
                        self.running = True
                        for output in self.touchscreen.stdout:
                            if not output or not self.keepGoing:
                                break
                            output = output.strip()
                            logging.debug("Touch '%s'" % output)
                            (tstamp, y, x, depth) = output.split()
                            x = int(x)
                            y = int(y)

                            rotation = self._agent._config['ui']['display']['rotation'] if self._agent else 180

                            if rotation == 180: # 0,0 is top left, but touch screen 0,0 is bottom left
                                x = self._view._width - x
                            else:
                                y = self._view._height - y

                            depth = int(depth)
                            if tstamp:
                                logging.debug("Touch %s at %s, %s" % (depth, x, y))
                                self.process_touch([int(x),int(y)], depth)
                        logging.info("ts_print exited")
                        self.running = False
                    else:
                        logging.info("No touchscreen?")
                    time.sleep(1)
            elif self.options.get("ts_type", None) == "gt1151":
                try:
                    prctl.set_name("GT1151")

                    GPIO.setmode(GPIO.BCM)
                    gt = gt1151_touchscreen(self.options)
                    gt.reset()
                    
                    self.keepGoing = True

                    flag_t = 1

                    rotation = self._agent._config['ui']['display'].get('rotation', 180) if self._agent else 180
                    in_touch = False

                    while self.keepGoing:
                        t = gt.digital_read(gt.INT)
                        if t == 0:
                            touches = gt.touchscan()
                            logging.debug("Reading: %s" % repr(touches))
                            for t in touches:
                                touch = touches[t]
                                x = touch['y']
                                y = touch['x']
                                s = touch['s']
                                if rotation == 180: # 0,0 is top left, but touch screen 0,0 is bottom left
                                    x = self._view._width - x
                                else:
                                    y = self._view._height - y

                                logging.debug("Touch %s: %s" % (t, touch))
                                self.process_touch([x, y], s)
                                         
                        time.sleep(0.1)

                    logging.info("        Touchscreen Loop exited")
                    gt.module_exit()
                except Exception as e:
                    logging.exception("Goodix: %s" % e)
        except Exception as e:
            logging.exception("Handler: %s" % repr(e))
    
    # called when http://<host>:<port>/plugins/<plugin>/ is called
    # must return a html page
    # IMPORTANT: If you use "POST"s, add a csrf-token (via csrf_token() and render_template_string)
    #def on_webhook(self, path, request):
        # define which elements are active or not
        # show pwny image. send clicks through
    #    pass

    # called when the plugin is loaded
    def on_loaded(self):
        # to test pimoroni displayhatmini buttons, uncomment below, or define in your config.toml
        ##if 'gpios' not in self.options:
        ##    self.options['gpios'] = {'ok': 6, 'back' : 5, 'next': 24, 'prev': 16}   # Pimoroni display hat mini
        try:
            self.init_gpio()
            pass
        except Exception as e:
            logging.warning(repr(e))

        # start touch screen background thread
        try:
            self.init_ts_handler()

        except Exception as e:
            logging.warning(repr(e))

        # notify plugins
        plugins.on("touch_ready", self)
        logging.info("loaded with options = %s" % self.options)

    # called before the plugin is unloaded
    def on_unload(self, ui):
        try:
            # stop the thread
            self.keepGoing = False
            flag_t = 0
            if self._ts_thread:
                if self.touchscreen:
                    logging.debug("TERM to %s" % self.touchscreen.pid)
                    os.kill(self.touchscreen.pid, signal.SIGTERM)
                logging.debug("Waiting for thread to exit")
                self._ts_thread.join()
                logging.info("And its done.")
            
        except Exception as e:
            logging.error("%s" % repr(e))

        try:
            # remove UI elements
            i = 0
            for n in self._ui_elements:
                ui.remove_element(n)
                logging.info("Removed %s" % repr(n))
                i += 1
            if i: logging.info("plugin unloaded %d elements" % i)

        except Exception as e:
            logging.error("%s" % repr(e))

        try:
            if 'gpios' in self.options:
                for i in self.options['gpios'].values():
                    logging.info("Stop detecting GPIO %s" % repr(i))
                    GPIO.remove_event_detect(i)

        except Exception as e:
            logging.error("%s" % repr(e))

    # called when there's internet connectivity - probably dont need this
    def on_internet_available(self, agent):
        if self.needsAptPackages:
            check_output(['apt', 'install', '-y'].extend(self.needsAptPackages))
            self.needsAptPackages = None

    # is this point(x,y) in box (x1, y1, x2, y2), x2>x1, y2>y1
    def pointInBox(self, point, box):
        try:
            logging.debug("is %s in %s" % (repr(point), repr(box)))
            if len(box) == 4:
                return (point[0] >= box[0] and point[0] <= box[2] and point[1] >= box[1] and point[1] <= box[3])
            else:
                logging.error("Unknown box size. return False")
                return False
        except Exception as e:
            logging.exception("Point: %s, Box: %s, error: %s" % (point, box, repr(e)))
            return False

    def collect_touch_elements(self):
        # - go through plugins, and build touch_elements cache and complete array
        #   - cache is a mapping of plugin to touch_elements
        # - in process_touch, compare each plugin touch_elements to cached, and update if changed
        # - cache bounding boxes of elements, indexed on "name:xy:font:value", and update when
        #   different
        # Any display elements listed in the array will be checked for _press and _release,
        # and be available for button presses.
        pass

    def process_touch(self, tpoint, depth):
        if not self._view:
            return

        logging.debug("PT: %s: %s" % (repr(tpoint), repr(depth)))

        touch_data = { 'point':tpoint, 'pressure': depth }

        # check UI element bounding boxes and call on_touch
        ui_elements = self._view._state._state
        touch_element = None
        touch_elements = list(filter(lambda x: hasattr(ui_elements[x], "state"), ui_elements.keys()))
        logging.debug("Touchable: %s" % repr(touch_elements))
        try:
            if int(depth) > 0:
                command = "touch_move" if self._beingTouched else "touch_press"
                self._beingTouched = True
            elif int(depth) == 0:
                command = "touch_release"
                self._beingTouched = False
            else:
                command = None

            if touch_elements:
                touch_elements.reverse()
                for te in touch_elements:
                    logging.debug("Checking %s, %s" % (te, repr(ui_elements[te].xy)))
                    if self.pointInBox(tpoint, ui_elements[te].xy):
                        logging.debug("Touched element %s: %s @ %s" % (repr(te),
                                                                      depth,
                                                                      repr(tpoint)))
                        touch_element = te
                        break # stop at first match

        except Exception as e:
            logging.exception(repr(e))

        if command:
            if touch_element:
                button = ui_elements[touch_element]
                if hasattr(button, "momentary") and button.momentary:
                    if command == "touch_press" or command == "touch_release":
                        self._view._state._changes[touch_element] = True
                    button.state = self._beingTouched
                    if reverse:
                        button.state = not button.state
                elif command == "touch_press":
                    button.state = not button.state
                    self._view._state._changes[touch_element] = True

                if hasattr(ui_elements[touch_element], 'event_handler'):
                    logging.debug("UI_Element %s Command: %s, handler: %s, data: %s" % (touch_element, command, ui_elements[touch_element].event_handler, repr(touch_data)))
                    plugins.one(ui_elements[touch_element].event_handler, command, self, self._view, touch_element, touch_data)
                else:
                    logging.debug("UI_Element %s Command: %s, handler: %s, data: %s" % (touch_element, command, ui_elements[touch_element], repr(touch_data)))
                    plugins.on(command, self, self._view, touch_element, touch_data)

            else:
                logging.debug("Touch Command: %s, data: %s" % (command, repr(touch_data)))
                plugins.on(command, self, self._view, touch_element, touch_data)

    # button handlers to cycle through touch areas and click
    # just detect clicks for now, NOT IMPLEMENTED YET
    def okButtonPress(self, button):
        logging.info("OK Button pressed: %s" % repr(button))
        if self.buttonCurrentZone:
            # find center, and highlight element
            pass

    def okButtonRelease(self, button):
        logging.info("OK Button released: %s" % repr(button))
        if self.buttonCurrentZone:
            # find center, and process click
            pass

    def backButtonPress(self, button):
        logging.info("Back Button pressed: %s" % repr(button))
        if self.buttonCurrentZone:
            # remove highlight and unselect
            self.buttonCurrentZone = None
            pass

    def backButtonRelease(self, button):
        logging.info("Back Button released: %s" % repr(button))
        if self.buttonCurrentZone:
            # remove highlight and unselect
            self.buttonCurrentZone = None
            pass

    def nextButtonPress(self, button):
        logging.info("Next Button pressed: %s" % repr(button))
        if self.buttonCurrentZone:
            # pick the next one
            pass
        else:
            # pick the first one, or last used one?
            pass

    def nextButtonRelease(self, button):
        logging.info("Next Button released: %s" % repr(button))
        if self.buttonCurrentZone:
            # pick the next one
            pass
        else:
            # pick the first one, or last used one?
            pass

    def prevButtonPress(self, button):
        logging.info("Prev Button pressed: %s" % repr(button))
        if self.buttonCurrentZone:
            # pick the previous one
            pass

    def prevButtonRelease(self, button):
        logging.info("Prev Button released: %s" % repr(button))
        if self.buttonCurrentZone:
            # pick the previous one
            pass

    # called when the hardware display setup is done, display is an hardware specific object
    def on_display_setup(self, display):
        # touchscreen setup/connection should go here, but doesn't have agent.. just display...
        pass

    # called when everything is ready and the main loop is about to start
    def on_ready(self, agent):
        self._agent = agent    # save for posterity
        self._view = self._agent._view

    def init_gpio(self):
        # set up GPIO - next, previous, ok, back
        GPIO.setmode(GPIO.BCM)
        if 'gpios' in self.options:
            if 'ok' in self.options['gpios']:
                try:
                    GPIO.setup(int(self.options['gpios']['ok']), GPIO.IN, GPIO.PUD_UP)
                    GPIO.add_event_detect(int(self.options['gpios']['ok']), GPIO.FALLING, callback=self.okButtonPress, bouncetime=600)
                    GPIO.add_event_detect(int(self.options['gpios']['ok']), GPIO.RISING, callback=self.okButtonRelease, bouncetime=600)
                except Exception as err:
                    logging.warning("OK button: %s" % repr(err))
            if 'next' in self.options['gpios']:
                try:
                    GPIO.setup(int(self.options['gpios']['next']), GPIO.IN, GPIO.PUD_UP)
                    GPIO.add_event_detect(int(self.options['gpios']['next']), GPIO.FALLING, callback=self.nextButtonPress, bouncetime=600)
                    GPIO.add_event_detect(int(self.options['gpios']['next']), GPIO.RISING, callback=self.nextButtonRelease, bouncetime=600)
                except Exception as err:
                    logging.warning("Next button: %s" % repr(err))
            if 'back' in self.options['gpios']:
                try:
                    GPIO.setup(int(self.options['gpios']['back']), GPIO.IN, GPIO.PUD_UP)
                    GPIO.add_event_detect(int(self.options['gpios']['back']), GPIO.FALLING, callback=self.backButtonPress, bouncetime=600)
                    GPIO.add_event_detect(int(self.options['gpios']['back']), GPIO.RISING, callback=self.backButtonRelease, bouncetime=600)
                except Exception as err:
                    logging.warning("Back button: %s" % repr(err))
            if 'prev' in self.options['gpios']:
                try:
                    GPIO.setup(int(self.options['gpios']['prev']), GPIO.IN, GPIO.PUD_UP)
                    GPIO.add_event_detect(int(self.options['gpios']['prev']), GPIO.FALLING, callback=self.prevButtonPress, bouncetime=600)
                    GPIO.add_event_detect(int(self.options['gpios']['prev']), GPIO.RISING, callback=self.prevButtonRelease, bouncetime=600)
                except Exception as err:
                    logging.warning("Prev button: %s" % repr(err))

    def init_ts_handler(self):
        # start touchscreen handler thread
        try:
            logging.debug("starting ts_print thread")
            self._ts_thread = threading.Thread(target=self.touchScreenHandler, args=(), daemon=True)
            if not self._ts_thread:
                logging.info("Thread failed?")

            #self.touchScreenHandler()
            logging.debug("starting ts_print thread")
            self._ts_thread.start()
            logging.info("started thread")

            logging.info("unit is ready")
        except Exception as e:
            logging.error(repr(e))

    # called to setup the ui elements
    def on_ui_setup(self, ui):
        self._view = ui
        # later, look through _view to get bounding boxes

    # called when the agent is rebooting the board
    def on_rebooting(self, agent):
        pass

    # called when the agent is waiting for t seconds
    def on_wait(self, agent, t):
        pass

    # called when the agent is sleeping for t seconds
    def on_sleep(self, agent, t):
        # update caches
        pass

if __name__ == "__main__":

    root = logging.getLogger()
    root.setLevel(logging.DEBUG)

    handler = logging.StreamHandler(sys.stdout)
    #handler.setLevel(logging.DEBUG)
    #formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    #handler.setFormatter(formatter)
    #root.addHandler(handler)    
    
    ts = Touch_Screen()

    #ts.touchScreenHandler()

    ts.okButtonPress(69)