commit 743008f61b449f40643c2d1c9a4cc1cd61016a51 Author: Emanuele Date: Fri May 1 21:50:08 2020 +0100 First prototype diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..0844781 --- /dev/null +++ b/.gitignore @@ -0,0 +1,53 @@ +svg/ +src/resources.py + +###Python### + +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# pyenv +.python-version + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..307ca44 --- /dev/null +++ b/README.md @@ -0,0 +1,67 @@ +# rMview: a fast live viewer for reMarkable + +## Instructions + +To run the program you need python with pyqt5 installed. +Before running the program the first time, generate the resource file with + + pyrcc5 -o src/resources.py resources.qrc + +Then you can invoke the program with + + python src/rmview.py [config] + +the optional `config` parameter is the filename of a json configuration file. +If the parameter is not found, the program will look for a `rmview.json` file in the current directory, or, if not found, for the path stored in the environment variable `RMVIEW_CONF`. +If none are found, or if the configuration is underspecified, the tool is going to prompt for address/password. + +The supported configuration settings are: + +```json +{ // all settings are optional, comments not allowed + "ssh": { + "address": "10.11.99.1", // works over WiFi too! + "username": "root", + "key": "~/.ssh/id_rsa_remarkable", + // alternatively to key, "password": "****" is supported + "timeout": 1 // in seconds + }, + "orientation": "portrait", // default: landscape + "pen_size": 10, + "pen_color": "red", + "fetch_frame_delay": 0.03 // sleep 0.03s on remarkable before fetching new frame (default is no delay) +} +``` + +## Requirements + +- Python 3 +- PyQt5 +- Paramiko +- lz4framed + +They can be installed via `pip install pyqt5 paramiko lz4framed`. + +## To Do + + - [ ] Settings dialog + - [ ] About dialog + - [ ] Pause stream of screen/pen + - [ ] Action to spawn a static viewer on a frame + - [ ] Build system + - [ ] Bundle + + +## Credits + +I took inspiration from the following projects: + +- [QtImageViewer](https://github.com/marcel-goldschen-ohm/PyQtImageViewer/) +- [remarkable_mouse](https://github.com/Evidlo/remarkable_mouse/) +- [reStream](https://github.com/rien/reStream) + +Icons adapted from designs by Freepik, xnimrodx from [www.flaticon.com][] + +## Licence + +GPLv3 diff --git a/assets/dead.svg b/assets/dead.svg new file mode 100644 index 0000000..e3fd5f3 --- /dev/null +++ b/assets/dead.svg @@ -0,0 +1,228 @@ + + + + + + image/svg+xml + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/assets/rmview.icns b/assets/rmview.icns new file mode 100644 index 0000000..6565906 Binary files /dev/null and b/assets/rmview.icns differ diff --git a/assets/rmview.svg b/assets/rmview.svg new file mode 100644 index 0000000..ace6898 --- /dev/null +++ b/assets/rmview.svg @@ -0,0 +1,25 @@ + + + + + + image/svg+xml + + + + + + + + + + + + + + + + + + + diff --git a/assets/tablet.svg b/assets/tablet.svg new file mode 100644 index 0000000..6c86ed5 --- /dev/null +++ b/assets/tablet.svg @@ -0,0 +1,27 @@ + + + + + + image/svg+xml + + + + + + + + + + + + + + + + + + + + + diff --git a/lz4.arm.static b/lz4.arm.static new file mode 100755 index 0000000..cd3b412 Binary files /dev/null and b/lz4.arm.static differ diff --git a/resources.qrc b/resources.qrc new file mode 100644 index 0000000..ecc3966 --- /dev/null +++ b/resources.qrc @@ -0,0 +1,7 @@ + + + assets/rmview.svg + assets/tablet.svg + assets/dead.svg + + \ No newline at end of file diff --git a/screenshot.png b/screenshot.png new file mode 100644 index 0000000..0939bdc Binary files /dev/null and b/screenshot.png differ diff --git a/src/connection.py b/src/connection.py new file mode 100644 index 0000000..0213cc0 --- /dev/null +++ b/src/connection.py @@ -0,0 +1,81 @@ +# from PyQt5.QtGui import * +# from PyQt5.QtWidgets import * +from PyQt5.QtCore import * + + +import paramiko +import struct +import time + +import sys +import os +import logging +log = logging.getLogger('rmview') + + + +class rMConnectSignals(QObject): + onConnect = pyqtSignal(object) + onError = pyqtSignal(Exception) + + +class rMConnect(QRunnable): + + _exception = None + + def __init__(self, address='10.11.99.1', username='root', password=None, key=None, timeout=1, onConnect=None, onError=None): + super(rMConnect, self).__init__() + self.address = address + self.signals = rMConnectSignals() + if callable(onConnect): + self.signals.onConnect.connect(onConnect) + if callable(onError): + self.signals.onError.connect(onError) + # self.key = key + try: + self.client = paramiko.SSHClient() + + if key is not None: + self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) + key = os.path.expanduser(key) + try: + pkey = paramiko.RSAKey.from_private_key_file(key) + except paramiko.ssh_exception.PasswordRequiredException: + passphrase, ok = QInputDialog.getText(self.viewer, "Configuration","SSH key passphrase:", QLineEdit.Password) + if ok: + pkey = paramiko.RSAKey.from_private_key_file(key, password=passphrase) + else: + raise Exception("A passphrase for SSH key is required") + else: + pkey = None + if password is None: + raise Exception("Must provide either password or SSH key") + + self.options = { + 'username': username, + 'password': password, + 'pkey': pkey, + 'timeout': timeout, + 'look_for_keys': False + } + except Exception as e: + self._exception = e + + @pyqtSlot() + def run(self): + if self._exception is not None: + self.signals.onError.emit(self._exception) + log.debug('Aborting connection: %s', self._exception) + return + try: + log.info('Connecting...') # pkey=key, + self.client.connect(self.address, **self.options) + log.info("Connected to {}".format(self.address)) + self.signals.onConnect.emit(self.client) + except Exception as e: + log.error("Could not connect to %s: %s", self.options.get('address'), e) + log.info("Please check your remarkable is connected and retry.") + self.signals.onError.emit(e) + log.debug('Stopping connection worker') + + diff --git a/src/rmparams.py b/src/rmparams.py new file mode 100644 index 0000000..e9ce4f7 --- /dev/null +++ b/src/rmparams.py @@ -0,0 +1,21 @@ +WIDTH = 1408 +HEIGHT = 1872 +PIXELS_NUM = WIDTH * HEIGHT +TOTAL_BYTES = PIXELS_NUM * 2 + +# evtype_sync = 0 +# evtype_key = 1 +e_type_abs = 3 + +# evcode_stylus_distance = 25 +# evcode_stylus_xtilt = 26 +# evcode_stylus_ytilt = 27 +e_code_stylus_xpos = 1 +e_code_stylus_ypos = 0 +e_code_stylus_pressure = 24 +# evcode_finger_xpos = 53 +# evcode_finger_ypos = 54 +# evcode_finger_pressure = 58 + +stylus_width = 15725 +stylus_height = 20951 \ No newline at end of file diff --git a/src/rmview.py b/src/rmview.py new file mode 100644 index 0000000..1a62216 --- /dev/null +++ b/src/rmview.py @@ -0,0 +1,183 @@ +from PyQt5.QtGui import * +from PyQt5.QtWidgets import * +from PyQt5.QtCore import * + +import resources +from workers import FrameBufferWorker, PointerWorker +from connection import rMConnect +from viewer import QtImageViewer + +from rmparams import * + +import sys +import os +import json + +import logging +logging.basicConfig(format='%(message)s') +log = logging.getLogger('rmview') + + +class rMViewApp(QApplication): + + config_file = None + config = {} + + viewer = None + fbworker = None + penworker = None + ssh = None + + pen = None + pen_size = 15 + + def __init__(self, args): + super(rMViewApp, self).__init__(args) + config_files = [] if len(args) < 2 else [args[1]] + config_files += ['rmview.json', os.environ.get("RMVIEW_CONF")] + log.info("Searching configuration in " + ', '.join(config_files)) + for f in config_files: + try: + with open(os.path.expanduser(f)) as config_file: + self.config = json.load(config_file) + self.config_file = config_file + log.info("Fetching configuration from " + f) + break + except Exception as e: + log.debug("Configuration failure in %s: %s" % (f, e)) + pass + self.config.setdefault('ssh', {}) + self.pen_size = self.config.get('pen_size', self.pen_size) + + + self.setWindowIcon(QIcon(':/assets/rmview.svg')) + + self.viewer = QtImageViewer() + self.viewer.setWindowTitle("rMview") + self.viewer.resize(QDesktopWidget().availableGeometry(self.viewer).size() * 0.7); + if self.config.get('orientation', 'landscape') == 'landscape': + self.viewer.rotateCW() + self.viewer.show() + + # bar = QMenuBar() + # menu = bar.addMenu('&View') + # act = QAction('Rotate clockwise', self) + # act.setShortcut('Ctrl+Right') + # act.triggered.connect(self.viewer.rotateCW) + # menu.addAction(act) + # act = QAction('Rotate counter-clockwise', self) + # act.setShortcut('Ctrl+Left') + # act.triggered.connect(self.viewer.rotateCCW) + # menu.addAction(act) + # menu.addSeparator() + # act = QAction('Save screenshot', self) + # act.setShortcut('Ctrl+S') + # act.triggered.connect(self.viewer.screenshot) + + + self.ensureConnConfig() + + self.threadpool = QThreadPool() + self.requestConnect() + + self.aboutToQuit.connect(self.joinWorkers) + + ecode = self.exec_() + print('\nBye!') + sys.exit(ecode) + + def ensureConnConfig(self): + if self.config['ssh'].get('address') is None: + address, ok = QInputDialog.getText(self.viewer, "Configuration","IP Address of your reMarkable:", QLineEdit.Normal, "10.11.99.1") + if ok and address: + self.config['ssh']['address'] = address + else: + self.quit() + + if self.config['ssh'].get('password') is None and self.config['ssh'].get('key') is None: + password, ok = QInputDialog.getText(self.viewer, "Configuration","reMarkable password:", QLineEdit.Password) + if ok: + self.config['ssh']['password'] = password or "" + else: + self.quit() + log.info(self.config) + + def requestConnect(self): + self.viewer.setWindowTitle("rMview - Connecting...") + self.threadpool.start( + rMConnect(**self.config.get('ssh'), + onError=self.connectionError, + onConnect=self.connected ) ) + + @pyqtSlot() + def joinWorkers(self): + if self.penworker is not None: + self.penworker.stop() + if self.fbworker is not None: + self.fbworker.stop() + if self.ssh is not None: + self.ssh.close() + self.threadpool.waitForDone() + + @pyqtSlot(object) + def connected(self, ssh): + self.ssh = ssh + self.viewer.setWindowTitle("rMview - " + self.config.get('ssh').get('address')) + self.fbworker = FrameBufferWorker(ssh, delay=self.config.get('fetch_frame_delay')) + self.fbworker.signals.onNewFrame.connect(lambda image: self.viewer.setImage(image)) + self.fbworker.signals.onFatalError.connect(self.frameError) + self.threadpool.start(self.fbworker) + + self.penworker = PointerWorker(ssh) + self.threadpool.start(self.penworker) + self.pen = self.viewer.scene.addEllipse(0,0,self.pen_size,self.pen_size, + pen=QPen(QColorConstants.White), + brush=QBrush(QColor(self.config.get('pen_color', 'red')))) + self.pen.hide() + self.pen.setZValue(100) + self.penworker.signals.onPenMove.connect(self.movePen) + self.penworker.signals.onPenLift.connect(self.pen.show) + self.penworker.signals.onPenPress.connect(self.pen.hide) + + + @pyqtSlot(int, int) + def movePen(self, x, y): + y = 20951 - y + ratio_width, ratio_height = WIDTH / 15725, HEIGHT / 20951 + scaling = ratio_width if ratio_width > ratio_height else ratio_height + x = scaling * (x - (15725 - WIDTH / scaling) / 2) + y = scaling * (y - (20951 - HEIGHT / scaling) / 2) + self.pen.setRect(x,y,self.pen_size,self.pen_size) + + + @pyqtSlot(Exception) + def connectionError(self, e): + self.viewer.setWindowTitle("rMview - Could not connect!") + log.error(e) + mbox = QMessageBox(QMessageBox.NoIcon, 'Connection error', "Connection attempt failed", parent=self.viewer) + icon = QPixmap(":/assets/dead.svg") + icon.setDevicePixelRatio(self.devicePixelRatio()) + mbox.setIconPixmap(icon) + mbox.setInformativeText("I could not connect to the reMarkable at %s:\n%s." % (self.config.get('ssh').get('address'), e)) + mbox.addButton(QMessageBox.Cancel) + # mbox.addButton("Settings...", QMessageBox.ResetRole) + mbox.addButton(QMessageBox.Retry) + mbox.setDefaultButton(QMessageBox.Retry) + answer = mbox.exec() + if answer == QMessageBox.Retry: + self.requestConnect() + elif answer == QMessageBox.Cancel: + self.quit() + else: + # self.open_settings() + self.quit() + + @pyqtSlot(Exception) + def frameError(self, e): + QMessageBox.critical(self.viewer, "Error", 'Please check your reMarkable is properly configured and with LZ4 installed.\n\n%s' % e) + self.quit() + +if __name__ == '__main__': + log.setLevel(logging.INFO) + QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling) + rMViewApp(sys.argv) diff --git a/src/viewer.py b/src/viewer.py new file mode 100644 index 0000000..db3149e --- /dev/null +++ b/src/viewer.py @@ -0,0 +1,168 @@ +""" QtImageViewer.py: PyQt image viewer widget for a QPixmap in a QGraphicsView scene with mouse zooming and panning. + +""" + +from PyQt5.QtCore import Qt, QRectF, pyqtSignal, QT_VERSION_STR +from PyQt5.QtGui import QImage, QPixmap, QTransform +from PyQt5.QtWidgets import QGraphicsView, QGraphicsScene, QFileDialog, QAction, QMenu + + +class QtImageViewer(QGraphicsView): + + def __init__(self): + QGraphicsView.__init__(self) + self.setAttribute(Qt.WA_OpaquePaintEvent, True) + + self.scene = QGraphicsScene() + self.setScene(self.scene) + + self._pixmap = None + self.aspectRatioMode = Qt.KeepAspectRatio + self.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded) + self.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded) + self.setAlignment(Qt.AlignCenter) + + self.menu = QMenu(self) + act = QAction('Fit to view', self) + # act.setShortcut('Ctrl+S') + act.triggered.connect(lambda: self.setFit(True)) + self.menu.addAction(act) + act = QAction('Rotate clockwise', self) + # act.setShortcut('Ctrl+Right') + act.triggered.connect(self.rotateCW) + self.menu.addAction(act) + act = QAction('Rotate counter-clockwise', self) + # act.setShortcut('Ctrl+Left') + act.triggered.connect(self.rotateCCW) + self.menu.addAction(act) + self.menu.addSeparator() + act = QAction('Save screenshot', self) + # act.setShortcut('Ctrl+S') + act.triggered.connect(self.screenshot) + self.menu.addAction(act) + + self._fit = True + self._rotation = 0 # used to produce a rotated screenshot + + def contextMenuEvent(self, event): + self.menu.exec_(self.mapToGlobal(event.pos())) + + def hasImage(self): + return self._pixmap is not None + + def clearImage(self): + if self.hasImage(): + self.scene.removeItem(self._pixmap) + self._pixmap = None + + def pixmap(self): + if self.hasImage(): + return self._pixmap.pixmap() + return None + + def image(self): + if self.hasImage(): + return self._pixmap.pixmap().toImage() + return None + + def setImage(self, image): + if type(image) is QPixmap: + pixmap = image + elif type(image) is QImage: + pixmap = QPixmap.fromImage(image) + else: + raise RuntimeError("ImageViewer.setImage: Argument must be a QImage or QPixmap.") + if self.hasImage(): + self._pixmap.setPixmap(pixmap) + else: + self._pixmap = self.scene.addPixmap(pixmap) + self._pixmap.setZValue(-1) + self.setSceneRect(QRectF(pixmap.rect())) # Set scene size to image size. + # self.fitInView(self.sceneRect(), self.aspectRatioMode) # Show entire image (use current aspect ratio mode). + self.updateViewer() + + def updateViewer(self): + if self.hasImage() is None: + return + if self._fit: + self.fitInView(self.sceneRect(), self.aspectRatioMode) + # else: + + def resizeEvent(self, event): + self.updateViewer() + + def mouseDoubleClickEvent(self, event): + # scenePos = self.mapToScene(event.pos()) + if event.button() == Qt.LeftButton: + self._fit=True + self.updateViewer() + # self.leftMouseButtonDoubleClicked.emit(scenePos.x(), scenePos.y()) + # elif event.button() == Qt.RightButton: + # self.rightMouseButtonDoubleClicked.emit(scenePos.x(), scenePos.y()) + QGraphicsView.mouseDoubleClickEvent(self, event) + + + def wheelEvent(self, event): + if event.modifiers() == Qt.NoModifier: + QGraphicsView.wheelEvent(self, event) + else: + self._fit = False + + # Zoom Factor + zoomInFactor = 1.25 + zoomOutFactor = 1 / zoomInFactor + + # Set Anchors + self.setTransformationAnchor(QGraphicsView.NoAnchor) + self.setResizeAnchor(QGraphicsView.NoAnchor) + + # Save the scene pos + oldPos = self.mapToScene(event.pos()) + + # Zoom + if event.angleDelta().y() > 0: + zoomFactor = zoomInFactor + else: + zoomFactor = zoomOutFactor + self.scale(zoomFactor, zoomFactor) + + # Get the new position + newPos = self.mapToScene(event.pos()) + + # Move scene to old position + delta = newPos - oldPos + self.translate(delta.x(), delta.y()) + + def screenshot(self): + img = self.image() + if img is not None: + fileName, ok = QFileDialog.getSaveFileName(self, "Save screenshot...", "rm-screenshot.png") + if ok and fileName: + print(self._rotation) + img = img.transformed(QTransform().rotate(self._rotation)); + img.save(fileName) + + def rotateCW(self): + self.rotate(90) + self._rotation += 90 + self.updateViewer() + + def rotateCCW(self): + self.rotate(-90) + self._rotation -= 90 + self.updateViewer() + + def setFit(self, f): + self._fit = f + self.updateViewer() + + def keyPressEvent(self, event): + if event.key() == Qt.Key_Left: + self.rotateCCW() + elif event.key() == Qt.Key_Right: + self.rotateCW() + elif event.key() == Qt.Key_1: + self.setFit(True) + elif event.key() == Qt.Key_S: + self.screenshot() + diff --git a/src/workers.py b/src/workers.py new file mode 100644 index 0000000..ff34a4f --- /dev/null +++ b/src/workers.py @@ -0,0 +1,154 @@ +from PyQt5.QtGui import * +from PyQt5.QtWidgets import * +from PyQt5.QtCore import * + +from rmparams import * + +import paramiko +import struct +import time + +import sys +import os +import logging +log = logging.getLogger('rmview') + +from lz4framed import Decompressor, Lz4FramedNoDataError + + + +SHOW_FPS = True + +class FBWSignals(QObject): + onFatalError = pyqtSignal(Exception) + onNewFrame = pyqtSignal(QImage) + + +class FrameBufferWorker(QRunnable): + + _stop = False + + def __init__(self, ssh, delay=None): + super(FrameBufferWorker, self).__init__() + self._read_loop = """\ + while dd if=/dev/fb0 count=1 bs={bytes} 2>/dev/null; do {delay}; done | $HOME/lz4 + """.format(bytes=TOTAL_BYTES, delay="sleep "+str(delay) if delay else "true") + self.ssh = ssh + self.signals = FBWSignals() + + def stop(self): + self._stop = True + + @pyqtSlot() + def run(self): + + _, rmstream, rmerr = self.ssh.exec_command(self._read_loop) + + data = b'' + pix = None + if SHOW_FPS: + f = 0 + t = time.perf_counter() + fps = 0 + + try: + for chunk in Decompressor(rmstream): + data += chunk + while len(data) >= TOTAL_BYTES: + new_pix = data[:TOTAL_BYTES] + data = data[TOTAL_BYTES:] + if new_pix != pix: + self.signals.onNewFrame.emit(QImage(new_pix, WIDTH, HEIGHT, WIDTH * 2, QImage.Format_Grayscale16)) + # Format_RGB16 works too but has slower performance? + pix = new_pix + if SHOW_FPS: + f += 1 + if f % 10 == 0: + fps = 10 / (time.perf_counter() - t) + t = time.perf_counter() + print("FRAME %d | FPS %.3f\r" % (f, fps), end='') + if self._stop: + log.debug('Stopping framebuffer worker') + break + except Lz4FramedNoDataError: + e = rmerr.read().decode('ascii') + if rmstream.channel.recv_exit_status() == 127: + log.info("Check if your remarkable has lz4 installed! %s", e) + self.signals.onFatalError.emit(Exception(e)) + except Exception as e: + log.error("Error: %s %s", type(e), e) + self.signals.onFatalError.emit(e) + + + +class PWSignals(QObject): + onFatalError = pyqtSignal(Exception) + onPenMove = pyqtSignal(int, int) + onPenPress = pyqtSignal() + onPenLift = pyqtSignal() + +LIFTED = 0 +PRESSED = 1 + + +class PointerWorker(QRunnable): + + _stop = False + + def __init__(self, ssh, threshold=1000): + super(PointerWorker, self).__init__() + self.ssh = ssh + self.threshold = threshold + self.signals = PWSignals() + + def stop(self): + self._stop = True + + @pyqtSlot() + def run(self): + _, penstream, _ = self.ssh.exec_command('cat /dev/input/event0') + new_x = new_y = False + state = LIFTED + + while not self._stop: + try: + _, _, e_type, e_code, e_value = struct.unpack('2IHHi', penstream.read(16)) + except struct.error: + return + except Exception as e: + print('Error in pointer worker: %s %s', type(e), e) + return + + # decoding adapted from remarkable_mouse + if e_type == e_type_abs: + + # handle x direction + if e_code == e_code_stylus_xpos: + x = e_value + new_x = True + + # handle y direction + if e_code == e_code_stylus_ypos: + y = e_value + new_y = True + + # handle draw + if e_code == e_code_stylus_pressure: + if e_value > self.threshold: + if state == LIFTED: + log.debug('PRESS') + state = PRESSED + self.signals.onPenPress.emit() + else: + if state == PRESSED: + log.debug('RELEASE') + state = LIFTED + self.signals.onPenLift.emit() + + + if new_x and new_y: + self.signals.onPenMove.emit(x, y) + new_x = new_y = False + + +