OctoTray/src/octotray.py

#!/usr/bin/env python3

# OctoTray Linux Qt System Tray OctoPrint client
#
# depends on:
# - python-pyqt5
#
# see also:
# https://doc.qt.io/qt-5/qtwidgets-widgets-imageviewer-example.html
# https://stackoverflow.com/a/22618496

import json
import sys
import os
import time
import string
import urllib.parse
import urllib.request
import signal
import operator
import socket
from os import path
from PyQt5 import QtWidgets, QtGui, QtCore, QtNetwork
from PyQt5.QtWidgets import QSystemTrayIcon, QAction, QMenu, QMessageBox, QWidget, QLabel, QVBoxLayout, QHBoxLayout, QDesktopWidget, QSizePolicy, QSlider, QLayout, QTableWidget, QTableWidgetItem, QPushButton, QApplication, QLineEdit, QGridLayout
from PyQt5.QtGui import QIcon, QPixmap, QImageReader, QDesktopServices, QFontDatabase, QCursor, QIntValidator
from PyQt5.QtCore import QCoreApplication, QSettings, QUrl, QTimer, QSize, Qt, QSettings

class SettingsWindow(QWidget):
    columns = [ "Hostname", "API Key", "Tool Preheat", "Bed Preheat" ]
    presets = [ "octopi.local", "000000000_API_KEY_HERE_000000000", "0", "0" ]

    def __init__(self, parent, *args, **kwargs):
        super(SettingsWindow, self).__init__(*args, **kwargs)
        self.parent = parent

        self.setWindowTitle(parent.name + " Settings")
        self.setWindowIcon(parent.icon)


        box = QVBoxLayout()
        self.setLayout(box)

        staticSettings = QGridLayout()
        box.addLayout(staticSettings, 0)

        self.jogSpeedText = QLabel("Jog Speed")
        staticSettings.addWidget(self.jogSpeedText, 0, 0)

        self.jogSpeed = QLineEdit(str(self.parent.jogMoveSpeed))
        self.jogSpeed.setValidator(QIntValidator(1, 6000))
        staticSettings.addWidget(self.jogSpeed, 0, 1)

        self.jogSpeedUnitText = QLabel("mm/min")
        staticSettings.addWidget(self.jogSpeedUnitText, 0, 2)

        self.jogLengthText = QLabel("Jog Length")
        staticSettings.addWidget(self.jogLengthText, 1, 0)

        self.jogLength = QLineEdit(str(self.parent.jogMoveLength))
        self.jogLength.setValidator(QIntValidator(1, 100))
        staticSettings.addWidget(self.jogLength, 1, 1)

        self.jogLengthUnitText = QLabel("mm")
        staticSettings.addWidget(self.jogLengthUnitText, 1, 2)

        helpText = "Usage:\n"
        helpText += "1st Column: Printer Hostname or IP address\n"
        helpText += "2nd Column: OctoPrint API Key (32 char hexadecimal)\n"
        helpText += "3rd Column: Tool Preheat Temperature (0 to disable)\n"
        helpText += "4th Column: Bed Preheat Temperature (0 to disable)"
        self.helpText = QLabel(helpText)
        box.addWidget(self.helpText, 0)
        box.setAlignment(self.helpText, Qt.AlignHCenter)

        buttons = QHBoxLayout()
        box.addLayout(buttons, 0)

        self.add = QPushButton("&Add Printer")
        self.add.clicked.connect(self.addPrinter)
        buttons.addWidget(self.add)

        self.remove = QPushButton("&Remove Printer")
        self.remove.clicked.connect(self.removePrinter)
        buttons.addWidget(self.remove)

        printers = self.parent.readSettings()
        self.rows = len(printers)
        self.table = QTableWidget(self.rows, len(self.columns))
        box.addWidget(self.table, 1)

        for i in range(0, self.rows):
            p = printers[i]
            for j in range(0, len(self.columns)):
                text = p[j]
                if (j >= 2) and (j <= 3) and (text == None):
                    text = "0"
                item = QTableWidgetItem(text)
                self.table.setItem(i, j, item)
                if j == 1:
                    font = item.font()
                    font.setFamily(QFontDatabase.systemFont(QFontDatabase.FixedFont).family())
                    item.setFont(font)

        buttons2 = QHBoxLayout()
        box.addLayout(buttons2, 0)

        self.up = QPushButton("Move &Up")
        self.up.clicked.connect(self.moveUp)
        buttons2.addWidget(self.up)

        self.down = QPushButton("Move &Down")
        self.down.clicked.connect(self.moveDown)
        buttons2.addWidget(self.down)

        self.openWeb = QPushButton("&Open Web UI of selected")
        self.openWeb.clicked.connect(self.openWebUI)
        box.addWidget(self.openWeb, 0)

        self.table.setHorizontalHeaderLabels(self.columns)
        self.table.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows);
        self.table.resizeColumnsToContents()

        if self.rows <= 0:
            self.addPrinter()

    def tableToList(self):
        printers = []
        for i in range(0, self.rows):
            p = []
            for j in range(0, len(self.columns)):
                text = self.table.item(i, j).text()
                if (j >= 2) and (j <= 3) and (text == "0"):
                    text = None
                p.append(text)
            printers.append(p)
        return printers

    def settingsValid(self, printers):
        for p in printers:
            # p[0] needs to be valid hostname or IP
            # TODO

            # p[1] needs to be valid API key (hexadecimal, 32 chars)
            if (len(p[1]) != 32) or not all(c in string.hexdigits for c in p[1]):
                return (False, "API Key not 32-digit hexadecimal")

            # p[2] and p[3] need to be integer temperatures (0...999)
            for s in [ p[2], p[3] ]:
                if s == None:
                    s = "0"
                if (len(s) < 1) or (len(s) > 3) or not all(c in string.digits for c in s):
                    return (False, "Temperature not a number from 0...999")

        js = int(self.jogSpeed.text())
        if (js < 1) or (js > 6000):
            return (False, "Jog Speed not a number from 1...6000")

        jl = int(self.jogLength.text())
        if (jl < 1) or (jl > 100):
            return (False, "Jog Length not a number from 1...100")

        return (True, "")

    def closeEvent(self, event):
        oldPrinters = [item[0:len(self.columns)] for item in self.parent.printers]
        newPrinters = self.tableToList()

        valid, errorText = self.settingsValid(newPrinters)
        if valid == False:
            r = self.parent.showDialog(self.parent.name + " Settings Invalid", errorText + "!", "Do you want to edit it again?", True, True, False)
            if r == True:
                event.ignore()
                return
            else:
                self.parent.removeSettingsWindow()
                return

        js = int(self.jogSpeed.text())
        jl = int(self.jogLength.text())

        if (oldPrinters != newPrinters) or (js != self.parent.jogMoveSpeed) or (jl != self.parent.jogMoveLength):
            r = self.parent.showDialog(self.parent.name + " Settings Changed", "Do you want to save the new configuration?", "This will restart the application!", True, False, False)
            if r == True:
                self.parent.jogMoveSpeed = js
                self.parent.jogMoveLength = jl
                self.parent.writeSettings(newPrinters)
                self.parent.restartApp()

        self.parent.removeSettingsWindow()

    def addPrinter(self):
        self.rows += 1
        self.table.setRowCount(self.rows)
        for i in range(0, len(self.columns)):
            item = QTableWidgetItem(self.presets[i])
            self.table.setItem(self.rows - 1, i, item)
            if i == 1:
                font = item.font()
                font.setFamily(QFontDatabase.systemFont(QFontDatabase.FixedFont).family())
                item.setFont(font)
        self.table.resizeColumnsToContents()
        self.table.setCurrentItem(self.table.item(self.rows - 1, 0))

    def removePrinter(self):
        r = self.table.currentRow()
        if (r >= 0) and (r < self.rows):
            self.rows -= 1
            self.table.removeRow(r)
            self.table.setCurrentItem(self.table.item(min(r, self.rows - 1), 0))

    def moveUp(self):
        i = self.table.currentRow()
        if i <= 0:
            return
        host = self.table.item(i, 0).text()
        key = self.table.item(i, 1).text()
        self.table.item(i, 0).setText(self.table.item(i - 1, 0).text())
        self.table.item(i, 1).setText(self.table.item(i - 1, 1).text())
        self.table.item(i - 1, 0).setText(host)
        self.table.item(i - 1, 1).setText(key)
        self.table.setCurrentItem(self.table.item(i - 1, 0))

    def moveDown(self):
        i = self.table.currentRow()
        if i >= (self.rows - 1):
            return
        host = self.table.item(i, 0).text()
        key = self.table.item(i, 1).text()
        self.table.item(i, 0).setText(self.table.item(i + 1, 0).text())
        self.table.item(i, 1).setText(self.table.item(i + 1, 1).text())
        self.table.item(i + 1, 0).setText(host)
        self.table.item(i + 1, 1).setText(key)
        self.table.setCurrentItem(self.table.item(i + 1, 0))

    def openWebUI(self):
        host = self.table.item(self.table.currentRow(), 0).text()
        self.parent.openBrowser(host)

class AspectRatioPixmapLabel(QLabel):
    def __init__(self, *args, **kwargs):
        super(AspectRatioPixmapLabel, self).__init__(*args, **kwargs)
        self.setMinimumSize(1, 1)
        self.setScaledContents(False)
        self.pix = QPixmap(0, 0)

    def setPixmap(self, p):
        self.pix = p
        super(AspectRatioPixmapLabel, self).setPixmap(self.scaledPixmap())

    def heightForWidth(self, width):
        if self.pix.isNull():
            return self.height()
        else:
            return (self.pix.height() * width) / self.pix.width()

    def sizeHint(self):
        w = self.width()
        return QSize(int(w), int(self.heightForWidth(w)))

    def scaledPixmap(self):
        return self.pix.scaled(self.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation)

    def resizeEvent(self, e):
        if not self.pix.isNull():
            super(AspectRatioPixmapLabel, self).setPixmap(self.scaledPixmap())

class CamWindow(QWidget):
    reloadDelayDefault = 1000 # in ms
    statusDelayFactor = 2
    reloadOn = True
    sliderFactor = 100

    def __init__(self, parent, printer, *args, **kwargs):
        super(CamWindow, self).__init__(*args, **kwargs)
        self.app = parent.app
        self.manager = parent.manager
        self.manager.finished.connect(self.handleResponse)
        self.parent = parent
        self.printer = printer
        self.host = self.printer[0]
        self.url = "http://" + self.host + ":8080/?action=snapshot"

        self.setWindowTitle(parent.name + " Webcam Stream")
        self.setWindowIcon(parent.icon)

        box = QVBoxLayout()
        self.setLayout(box)

        label = QLabel(self.url)
        box.addWidget(label, 0)
        box.setAlignment(label, Qt.AlignHCenter)

        slide = QHBoxLayout()
        box.addLayout(slide, 0)

        self.slideStaticLabel = QLabel("Refresh")
        slide.addWidget(self.slideStaticLabel, 0)

        self.slider = QSlider(Qt.Horizontal)
        self.slider.setMinimum(int(100 / self.sliderFactor))
        self.slider.setMaximum(int(2000 / self.sliderFactor))
        self.slider.setTickInterval(int(100 / self.sliderFactor))
        self.slider.setPageStep(int(100 / self.sliderFactor))
        self.slider.setSingleStep(int(100 / self.sliderFactor))
        self.slider.setTickPosition(QSlider.TicksBelow)
        self.slider.setValue(int(self.reloadDelayDefault / self.sliderFactor))
        self.slider.valueChanged.connect(self.sliderChanged)
        slide.addWidget(self.slider, 1)

        self.slideLabel = QLabel(str(self.reloadDelayDefault) + "ms")
        slide.addWidget(self.slideLabel, 0)

        self.img = AspectRatioPixmapLabel()
        self.img.setPixmap(QPixmap(640, 480))
        box.addWidget(self.img, 1)

        self.statusLabel = QLabel("Status: unavailable")
        box.addWidget(self.statusLabel, 0)
        box.setAlignment(self.statusLabel, Qt.AlignHCenter)

        self.method = self.parent.getMethod(self.printer[0], self.printer[1])
        if self.method != "unknown":
            controls_power = QHBoxLayout()
            box.addLayout(controls_power, 0)

            self.turnOnButton = QPushButton("Turn O&n")
            self.turnOnButton.clicked.connect(self.turnOn)
            controls_power.addWidget(self.turnOnButton)

            self.turnOffButton = QPushButton("Turn O&ff")
            self.turnOffButton.clicked.connect(self.turnOff)
            controls_power.addWidget(self.turnOffButton)

        controls_temp = QHBoxLayout()
        box.addLayout(controls_temp, 0)

        self.cooldownButton = QPushButton("&Cooldown")
        self.cooldownButton.clicked.connect(self.cooldown)
        controls_temp.addWidget(self.cooldownButton)

        self.preheatToolButton = QPushButton("Preheat &Tool")
        self.preheatToolButton.clicked.connect(self.preheatTool)
        controls_temp.addWidget(self.preheatToolButton)

        self.preheatBedButton = QPushButton("Preheat &Bed")
        self.preheatBedButton.clicked.connect(self.preheatBed)
        controls_temp.addWidget(self.preheatBedButton)

        controls_home = QHBoxLayout()
        box.addLayout(controls_home, 0)

        self.homeAllButton = QPushButton("Home &All")
        self.homeAllButton.clicked.connect(self.homeAll)
        controls_home.addWidget(self.homeAllButton, 1)

        self.homeXButton = QPushButton("Home &X")
        self.homeXButton.clicked.connect(self.homeX)
        controls_home.addWidget(self.homeXButton, 0)

        self.homeYButton = QPushButton("Home &Y")
        self.homeYButton.clicked.connect(self.homeY)
        controls_home.addWidget(self.homeYButton, 0)

        self.homeZButton = QPushButton("Home &Z")
        self.homeZButton.clicked.connect(self.homeZ)
        controls_home.addWidget(self.homeZButton, 0)

        controls_move = QHBoxLayout()
        box.addLayout(controls_move, 0)

        self.XPButton = QPushButton("X+")
        self.XPButton.clicked.connect(self.moveXP)
        controls_move.addWidget(self.XPButton)

        self.XMButton = QPushButton("X-")
        self.XMButton.clicked.connect(self.moveXM)
        controls_move.addWidget(self.XMButton)

        self.YPButton = QPushButton("Y+")
        self.YPButton.clicked.connect(self.moveYP)
        controls_move.addWidget(self.YPButton)

        self.YMButton = QPushButton("Y-")
        self.YMButton.clicked.connect(self.moveYM)
        controls_move.addWidget(self.YMButton)

        self.ZPButton = QPushButton("Z+")
        self.ZPButton.clicked.connect(self.moveZP)
        controls_move.addWidget(self.ZPButton)

        self.ZMButton = QPushButton("Z-")
        self.ZMButton.clicked.connect(self.moveZM)
        controls_move.addWidget(self.ZMButton)

        self.loadImage()
        self.loadStatus()

    def moveXP(self):
        self.parent.printerMoveAction(self.printer, "x", int(self.parent.jogMoveLength), True)

    def moveXM(self):
        self.parent.printerMoveAction(self.printer, "x", -1 * int(self.parent.jogMoveLength), True)

    def moveYP(self):
        self.parent.printerMoveAction(self.printer, "y", int(self.parent.jogMoveLength), True)

    def moveYM(self):
        self.parent.printerMoveAction(self.printer, "y", -1 * int(self.parent.jogMoveLength), True)

    def moveZP(self):
        self.parent.printerMoveAction(self.printer, "z", int(self.parent.jogMoveLength), True)

    def moveZM(self):
        self.parent.printerMoveAction(self.printer, "z", -1 * int(self.parent.jogMoveLength), True)

    def homeX(self):
        self.parent.printerHomingAction(self.printer, "x")

    def homeY(self):
        self.parent.printerHomingAction(self.printer, "y")

    def homeZ(self):
        self.parent.printerHomingAction(self.printer, "z")

    def homeAll(self):
        self.parent.printerHomingAction(self.printer, "xyz")

    def turnOn(self):
        if self.method == "psucontrol":
            self.parent.printerOnAction(self.printer)
        elif self.method == "system":
            cmds = self.parent.getSystemCommands(self.printer[0], self.printer[1])
            for cmd in cmds:
                if "on" in cmd:
                    self.parent.setSystemCommand(self.printer[0], self.printer[1], cmd)
                    break

    def turnOff(self):
        if self.method == "psucontrol":
            self.parent.printerOffAction(self.printer)
        elif self.method == "system":
            cmds = self.parent.getSystemCommands(self.printer[0], self.printer[1])
            for cmd in cmds:
                if "off" in cmd:
                    self.parent.setSystemCommand(self.printer[0], self.printer[1], cmd)
                    break

    def cooldown(self):
        self.parent.printerCooldown(self.printer)

    def preheatTool(self):
        self.parent.printerHeatTool(self.printer)

    def preheatBed(self):
        self.parent.printerHeatBed(self.printer)

    def getHost(self):
        return self.host

    def sliderChanged(self):
        self.slideLabel.setText(str(self.slider.value() * self.sliderFactor) + "ms")

    def closeEvent(self, event):
        self.reloadOn = False
        self.url = ""
        self.parent.removeWebcamWindow(self)

    def scheduleLoadImage(self):
        if self.reloadOn:
            QTimer.singleShot(self.slider.value() * self.sliderFactor, self.loadImage)

    def scheduleLoadStatus(self):
        if self.reloadOn:
            QTimer.singleShot(self.slider.value() * self.sliderFactor * self.statusDelayFactor, self.loadStatus)

    def loadImage(self):
        url = QUrl(self.url)
        request = QtNetwork.QNetworkRequest(url)
        self.manager.get(request)

    def loadStatus(self):
        s = "Status: "
        t = self.parent.getTemperatureString(self.host, self.printer[1])
        if len(t) > 0:
            s += t
        else:
            s += "Unknown"

        progress = self.parent.getProgress(self.host, self.printer[1])
        if ("completion" in progress) and ("printTime" in progress) and ("printTimeLeft" in progress) and (progress["completion"] != None) and (progress["printTime"] != None) and (progress["printTimeLeft"] != None):
            s += " - %.1f%%" % progress["completion"]
            s += " - runtime "
            s += time.strftime("%H:%M:%S", time.gmtime(progress["printTime"]))
            s += " - "
            s += time.strftime("%H:%M:%S", time.gmtime(progress["printTimeLeft"])) + " left"

        self.statusLabel.setText(s)
        self.scheduleLoadStatus()

    def handleResponse(self, reply):
        if reply.url().url() == self.url:
            if reply.error() == QtNetwork.QNetworkReply.NoError:
                reader = QImageReader(reply)
                reader.setAutoTransform(True)
                image = reader.read()
                if image != None:
                    if image.colorSpace().isValid():
                        image.convertToColorSpace(QColorSpace.SRgb)
                    self.img.setPixmap(QPixmap.fromImage(image))
                    self.scheduleLoadImage()
                else:
                    print("Error decoding image: " + reader.errorString())
            else:
                print("Error loading image: " + reply.errorString())

class MainWindow(QWidget):
    def __init__(self, parent, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)
        self.parent = parent

        self.mainLayout = QVBoxLayout()
        self.setLayout(self.mainLayout)
        self.mainLayout.addWidget(self.parent.menu)

        self.parent.menu.aboutToHide.connect(self.aboutToHide)

    def aboutToHide(self):
        self.parent.menu.show()

    def closeEvent(self, event):
        self.parent.exit()
        event.accept()

class OctoTray():
    name = "OctoTray"
    vendor = "xythobuz"
    version = "0.4"

    iconName = "octotray_icon.png"
    iconPaths = [
        path.abspath(path.dirname(__file__)),
        "data",
        "/usr/share/pixmaps",
        ".",
        "..",
        "../data"
    ]

    networkTimeout = 2.0 # in s

    # list of lists, inner lists contain printer data:
    # first elements as in SettingsWindow.columns
    # 0=host 1=key 2=tool-preheat 3=bed-preheat
    # rest used for system-commands, menu, actions
    printers = []

    statesWithWarning = [
        "Printing", "Pausing", "Paused"
    ]

    camWindows = []
    settingsWindow = None

    # default, can be overridden in config
    jogMoveSpeed = 10 * 60 # in mm/min
    jogMoveLength = 10 # in mm

    def __init__(self, app, inSysTray):
        QCoreApplication.setApplicationName(self.name)
        self.app = app
        self.inSysTray = inSysTray

        self.manager = QtNetwork.QNetworkAccessManager()
        self.menu = QMenu()
        self.printers = self.readSettings()

        unknownCount = 0
        for p in self.printers:
            method = self.getMethod(p[0], p[1])
            print("Printer " + p[0] + " has method " + method)
            if method == "unknown":
                unknownCount += 1

                action = QAction(p[0])
                action.setEnabled(False)
                p.append(action)
                self.menu.addAction(action)

                continue

            commands = self.getSystemCommands(p[0], p[1])
            p.append(commands)

            menu = QMenu(self.getName(p[0], p[1]))
            p.append(menu)
            self.menu.addMenu(menu)

            if method == "psucontrol":
                action = QAction("Turn On PSU")
                action.triggered.connect(lambda chk, x=p: self.printerOnAction(x))
                p.append(action)
                menu.addAction(action)

                action = QAction("Turn Off PSU")
                action.triggered.connect(lambda chk, x=p: self.printerOffAction(x))
                p.append(action)
                menu.addAction(action)

            for i in range(0, len(commands)):
                action = QAction(commands[i].title())
                action.triggered.connect(lambda chk, x=p, y=i: self.printerSystemCommandAction(x, y))
                p.append(action)
                menu.addAction(action)

            if (p[2] != None) or (p[3] != None):
                menu.addSeparator()

            if p[2] != None:
                action = QAction("Preheat Tool")
                action.triggered.connect(lambda chk, x=p: self.printerHeatTool(x))
                p.append(action)
                menu.addAction(action)

            if p[3] != None:
                action = QAction("Preheat Bed")
                action.triggered.connect(lambda chk, x=p: self.printerHeatBed(x))
                p.append(action)
                menu.addAction(action)

            if (p[2] != None) or (p[3] != None):
                action = QAction("Cooldown")
                action.triggered.connect(lambda chk, x=p: self.printerCooldown(x))
                p.append(action)
                menu.addAction(action)

            menu.addSeparator()

            fileMenu = QMenu("Recent Files")
            p.append(fileMenu)
            menu.addMenu(fileMenu)

            files = self.getRecentFiles(p[0], p[1], 10)
            for f in files:
                fileName, filePath = f
                action = QAction(fileName)
                action.triggered.connect(lambda chk, x=p, y=filePath: self.printerFilePrint(x, y))
                p.append(action)
                fileMenu.addAction(action)

            action = QAction("Get Status")
            action.triggered.connect(lambda chk, x=p: self.printerStatusAction(x))
            p.append(action)
            menu.addAction(action)

            action = QAction("Show Webcam")
            action.triggered.connect(lambda chk, x=p: self.printerWebcamAction(x))
            p.append(action)
            menu.addAction(action)

            action = QAction("Open Web UI")
            action.triggered.connect(lambda chk, x=p: self.printerWebAction(x))
            p.append(action)
            menu.addAction(action)

        self.menu.addSeparator()

        self.settingsAction = QAction("&Settings")
        self.settingsAction.triggered.connect(self.showSettingsAction)
        self.menu.addAction(self.settingsAction)

        self.refreshAction = QAction("&Refresh")
        self.refreshAction.triggered.connect(self.restartApp)
        self.menu.addAction(self.refreshAction)

        self.quitAction = QAction("&Quit")
        self.quitAction.triggered.connect(self.exit)
        self.menu.addAction(self.quitAction)

        self.iconPathName = None
        for p in self.iconPaths:
            if os.path.isfile(path.join(p, self.iconName)):
                self.iconPathName = path.join(p, self.iconName)
                break
        if self.iconPathName == None:
            self.showDialog("OctoTray Error", "Icon file has not been found!", "", False, False, True)
            sys.exit(0)

        self.icon = QIcon()
        self.pic = QPixmap(32, 32)
        self.pic.load(self.iconPathName)
        self.icon = QIcon(self.pic)

        if self.inSysTray:
            self.trayIcon = QSystemTrayIcon(self.icon)
            self.trayIcon.setToolTip(self.name + " " + self.version)
            self.trayIcon.setContextMenu(self.menu)
            self.trayIcon.activated.connect(self.showHide)
            self.trayIcon.setVisible(True)
        else:
            self.mainWindow = MainWindow(self)
            self.mainWindow.show()
            self.mainWindow.activateWindow()
            screenGeometry = QDesktopWidget().screenGeometry()
            x = (screenGeometry.width() - self.mainWindow.width()) / 2
            y = (screenGeometry.height() - self.mainWindow.height()) / 2
            x += screenGeometry.x()
            y += screenGeometry.y()
            self.mainWindow.setGeometry(int(x), int(y), int(self.mainWindow.width()), int(self.mainWindow.height()))

    def showHide(self, activationReason):
        if activationReason == QSystemTrayIcon.Trigger:
            self.menu.popup(QCursor.pos())
        elif activationReason == QSystemTrayIcon.MiddleClick:
            if len(self.printers) > 0:
                self.printerWebcamAction(self.printers[0])

    def readSettings(self):
        settings = QSettings(self.vendor, self.name)

        js = settings.value("jog_speed")
        if js != None:
            self.jogMoveSpeed = int(js)

        jl = settings.value("jog_length")
        if jl != None:
            self.jogMoveLength = int(jl)

        printers = []
        l = settings.beginReadArray("printers")
        for i in range(0, l):
            settings.setArrayIndex(i)
            p = []
            p.append(settings.value("host"))
            p.append(settings.value("key"))
            p.append(settings.value("tool_preheat"))
            p.append(settings.value("bed_preheat"))
            printers.append(p)
        settings.endArray()
        return printers

    def writeSettings(self, printers):
        settings = QSettings(self.vendor, self.name)

        settings.setValue("jog_speed", self.jogMoveSpeed)
        settings.setValue("jog_length", self.jogMoveLength)

        settings.remove("printers")
        settings.beginWriteArray("printers")
        for i in range(0, len(printers)):
            p = printers[i]
            settings.setArrayIndex(i)
            settings.setValue("host", p[0])
            settings.setValue("key", p[1])
            settings.setValue("tool_preheat", p[2])
            settings.setValue("bed_preheat", p[3])
        settings.endArray()
        del settings

    def openBrowser(self, url):
        QDesktopServices.openUrl(QUrl("http://" + url))

    def showDialog(self, title, text1, text2 = "", question = False, warning = False, error = False):
        msg = QMessageBox()

        if error:
            msg.setIcon(QMessageBox.Critical)
        elif warning:
            msg.setIcon(QMessageBox.Warning)
        elif question:
            msg.setIcon(QMessageBox.Question)
        else:
            msg.setIcon(QMessageBox.Information)

        msg.setWindowTitle(title)
        msg.setText(text1)

        if text2 is not None:
            msg.setInformativeText(text2)

        if question:
            msg.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
        else:
            msg.setStandardButtons(QMessageBox.Ok)

        retval = msg.exec_()
        if retval == QMessageBox.Yes:
            return True
        else:
            return False

    def sendRequest(self, host, headers, path, content = None):
        url = "http://" + host + "/api/" + path
        if content == None:
            request = urllib.request.Request(url, None, headers)
        else:
            data = content.encode('ascii')
            request = urllib.request.Request(url, data, headers)

        try:
            with urllib.request.urlopen(request, None, self.networkTimeout) as response:
                text = response.read()
                return text
        except (urllib.error.URLError, urllib.error.HTTPError) as error:
            print("Error requesting URL \"" + url + "\": \"" + str(error) + "\"")
            return "error"
        except socket.timeout:
            print("Timeout waiting for response to \"" + url + "\"")
            return "timeout"

    def sendPostRequest(self, host, key, path, content):
        headers = {
            "Content-Type": "application/json",
            "X-Api-Key": key
        }
        return self.sendRequest(host, headers, path, content)

    def sendGetRequest(self, host, key, path):
        headers = {
            "X-Api-Key": key
        }
        return self.sendRequest(host, headers, path)

    def getTemperatureIsSafe(self, host, key):
        r = self.sendGetRequest(host, key, "printer")
        try:
            rd = json.loads(r)

            if "temperature" in rd:
                if ("tool0" in rd["temperature"]) and ("actual" in rd["temperature"]["tool0"]):
                    if rd["temperature"]["tool0"]["actual"] > 50.0:
                        return False

                if ("tool1" in rd["temperature"]) and ("actual" in rd["temperature"]["tool1"]):
                    if rd["temperature"]["tool1"]["actual"] > 50.0:
                        return False
        except json.JSONDecodeError:
            pass
        return True

    def getTemperatureString(self, host, key):
        r = self.sendGetRequest(host, key, "printer")
        s = ""
        try:
            rd = json.loads(r)

            if ("state" in rd) and ("text" in rd["state"]):
                s += rd["state"]["text"]
                if "temperature" in rd:
                    s += " - "

            if "temperature" in rd:
                if "bed" in rd["temperature"]:
                    if "actual" in rd["temperature"]["bed"]:
                        s += "B"
                        s += "%.1f" % rd["temperature"]["bed"]["actual"]
                        if "target" in rd["temperature"]["bed"]:
                            s += "/"
                            s += "%.1f" % rd["temperature"]["bed"]["target"]
                        s += " "

                if "tool0" in rd["temperature"]:
                    if "actual" in rd["temperature"]["tool0"]:
                        s += "T"
                        s += "%.1f" % rd["temperature"]["tool0"]["actual"]
                        if "target" in rd["temperature"]["tool0"]:
                            s += "/"
                            s += "%.1f" % rd["temperature"]["tool0"]["target"]
                        s += " "

                if "tool1" in rd["temperature"]:
                    if "actual" in rd["temperature"]["tool1"]:
                        s += "T"
                        s += "%.1f" % rd["temperature"]["tool1"]["actual"]
                        if "target" in rd["temperature"]["tool1"]:
                            s += "/"
                            s += "%.1f" % rd["temperature"]["tool1"]["target"]
                        s += " "
        except json.JSONDecodeError:
            pass
        return s.strip()

    def getState(self, host, key):
        r = self.sendGetRequest(host, key, "job")
        try:
            rd = json.loads(r)
            if "state" in rd:
                return rd["state"]
        except json.JSONDecodeError:
            pass
        return "Unknown"

    def getProgress(self, host, key):
        r = self.sendGetRequest(host, key, "job")
        try:
            rd = json.loads(r)
            if "progress" in rd:
                return rd["progress"]
        except json.JSONDecodeError:
            pass
        return "Unknown"

    def getName(self, host, key):
        r = self.sendGetRequest(host, key, "printerprofiles")
        try:
            rd = json.loads(r)
            if "profiles" in rd:
                p = next(iter(rd["profiles"]))
                if "name" in rd["profiles"][p]:
                    return rd["profiles"][p]["name"]
        except json.JSONDecodeError:
            pass
        return host

    def getRecentFiles(self, host, key, count):
        r = self.sendGetRequest(host, key, "files?recursive=true")
        files = []
        try:
            rd = json.loads(r)
            if "files" in rd:
                t = [f for f in rd["files"] if "date" in f]
                fs = sorted(t, key=operator.itemgetter("date"), reverse=True)
                for f in fs[:count]:
                    files.append((f["name"], f["origin"] + "/" + f["path"]))
        except json.JSONDecodeError:
            pass
        return files

    def getMethod(self, host, key):
        r = self.sendGetRequest(host, key, "plugin/psucontrol")
        if r == "timeout":
            return "unknown"

        try:
            rd = json.loads(r)
            if "isPSUOn" in rd:
                return "psucontrol"
        except json.JSONDecodeError:
            pass

        r = self.sendGetRequest(host, key, "system/commands/custom")
        if r == "timeout":
            return "unknown"

        try:
            rd = json.loads(r)
            for c in rd:
                if "action" in c:
                    # we have some custom commands and no psucontrol
                    # so lets try to use that instead of skipping
                    # the printer completely with 'unknown'
                    return "system"
        except json.JSONDecodeError:
            pass

        return "unknown"

    def getSystemCommands(self, host, key):
        l = []
        r = self.sendGetRequest(host, key, "system/commands/custom")
        try:
            rd = json.loads(r)

            if len(rd) > 0:
                print("system commands available for " + host + ":")

            for c in rd:
                if "action" in c:
                    print("  - " + c["action"])
                    l.append(c["action"])
        except json.JSONDecodeError:
            pass
        return l

    def setPSUControl(self, host, key, state):
        cmd = "turnPSUOff"
        if state:
            cmd = "turnPSUOn"
        return self.sendPostRequest(host, key, "plugin/psucontrol", '{ "command":"' + cmd + '" }')

    def setSystemCommand(self, host, key, cmd):
        cmd = urllib.parse.quote(cmd)
        return self.sendPostRequest(host, key, "system/commands/custom/" + cmd, '')

    def exit(self):
        QCoreApplication.quit()

    def printerSystemCommandAction(self, item, index):
        if "off" in item[2][index].lower():
            state = self.getState(item[0], item[1])
            if state in self.statesWithWarning:
                if self.showDialog("OctoTray Warning", "The printer seems to be running currently!", "Do you really want to run '" + item[2][index] + "'?", True, True) == False:
                    return

            safe = self.getTemperatureIsSafe(item[0], item[1])
            if safe == False:
                if self.showDialog("OctoTray Warning", "The printer seems to still be hot!", "Do you really want to turn it off?", True, True) == False:
                    return

        self.setSystemCommand(item[0], item[1], item[2][index])

    def printerOnAction(self, item):
        self.setPSUControl(item[0], item[1], True)

    def printerOffAction(self, item):
        state = self.getState(item[0], item[1])
        if state in self.statesWithWarning:
            if self.showDialog("OctoTray Warning", "The printer seems to be running currently!", "Do you really want to turn it off?", True, True) == False:
                return

        safe = self.getTemperatureIsSafe(item[0], item[1])
        if safe == False:
            if self.showDialog("OctoTray Warning", "The printer seems to still be hot!", "Do you really want to turn it off?", True, True) == False:
                return

        self.setPSUControl(item[0], item[1], False)

    def printerHomingAction(self, item, axes = "xyz"):
        state = self.getState(item[0], item[1])
        if state in self.statesWithWarning:
            if self.showDialog("OctoTray Warning", "The printer seems to be running currently!", "Do you really want to home it?", True, True) == False:
                return

        axes_string = ''
        for i in range(0, len(axes)):
            axes_string += '"' + str(axes[i]) + '"'
            if i < (len(axes) - 1):
                axes_string += ', '

        self.sendPostRequest(item[0], item[1], "printer/printhead", '{ "command": "home", "axes": [' + axes_string + '] }')

    def printerMoveAction(self, printer, axis, dist, relative = True):
        state = self.getState(printer[0], printer[1])
        if state in self.statesWithWarning:
            if self.showDialog("OctoTray Warning", "The printer seems to be running currently!", "Do you really want to move it?", True, True) == False:
                return

        absolute = ''
        if relative == False:
            absolute = ', "absolute": true'

        self.sendPostRequest(printer[0], printer[1], "printer/printhead", '{ "command": "jog", "' + str(axis) + '": ' + str(dist) + ', "speed": ' + str(self.jogMoveSpeed) + absolute + ' }')

    def printerWebAction(self, item):
        self.openBrowser(item[0])

    def printerStatusAction(self, item):
        progress = self.getProgress(item[0], item[1])
        s = item[0] + "\n"
        warning = False
        if ("completion" in progress) and ("printTime" in progress) and ("printTimeLeft" in progress) and (progress["completion"] != None) and (progress["printTime"] != None) and (progress["printTimeLeft"] != None):
            s += "%.1f%% Completion\n" % progress["completion"]
            s += "Printing since " + time.strftime("%H:%M:%S", time.gmtime(progress["printTime"])) + "\n"
            s += time.strftime("%H:%M:%S", time.gmtime(progress["printTimeLeft"])) + " left"
        elif ("completion" in progress) and ("printTime" in progress) and ("printTimeLeft" in progress):
            s += "No job is currently running"
        else:
            s += "Could not read printer status!"
            warning = True
        t = self.getTemperatureString(item[0], item[1])
        if len(t) > 0:
            s += "\n" + t
        self.showDialog("OctoTray Status", s, None, False, warning)

    def printerFilePrint(self, item, path):
        self.sendPostRequest(item[0], item[1], "files/" + path, '{ "command": "select", "print": true }')

    def setTemperature(self, host, key, what, temp):
        path = "printer/bed"
        s = "{\"command\": \"target\", \"target\": " + temp + "}"

        if "tool" in what:
            path = "printer/tool"
            s = "{\"command\": \"target\", \"targets\": {\"" + what + "\": " + temp + "}}"

        if temp == None:
            temp = 0

        self.sendPostRequest(host, key, path, s)

    def printerHeatTool(self, p):
        self.setTemperature(p[0], p[1], "tool0", p[2])

    def printerHeatBed(self, p):
        self.setTemperature(p[0], p[1], "bed", p[3])

    def printerCooldown(self, p):
        state = self.getState(p[0], p[1])
        if state in self.statesWithWarning:
            if self.showDialog("OctoTray Warning", "The printer seems to be running currently!", "Do you really want to turn it off?", True, True) == False:
                return

        self.setTemperature(p[0], p[1], "tool0", 0)
        self.setTemperature(p[0], p[1], "bed", 0)

    def printerWebcamAction(self, item):
        for cw in self.camWindows:
            if cw.getHost() == item[0]:
                cw.show()
                cw.activateWindow()
                return

        window = CamWindow(self, item)
        self.camWindows.append(window)

        window.show()
        window.activateWindow()

        screenGeometry = QDesktopWidget().screenGeometry()
        x = (screenGeometry.width() - window.width()) / 2
        y = (screenGeometry.height() - window.height()) / 2
        x += screenGeometry.x()
        y += screenGeometry.y()
        window.setGeometry(int(x), int(y), int(window.width()), int(window.height()))

    def removeWebcamWindow(self, window):
        self.camWindows.remove(window)

    def showSettingsAction(self):
        if self.settingsWindow != None:
            self.settingsWindow.show()
            self.settingsWindow.activateWindow()
            return

        self.settingsWindow = SettingsWindow(self)
        self.settingsWindow.show()
        self.settingsWindow.activateWindow()

        screenGeometry = QDesktopWidget().screenGeometry()
        x = (screenGeometry.width() - self.settingsWindow.width()) / 2
        y = (screenGeometry.height() - self.settingsWindow.height()) / 2
        x += screenGeometry.x()
        y += screenGeometry.y()
        self.settingsWindow.setGeometry(int(x), int(y), int(self.settingsWindow.width()), int(self.settingsWindow.height()) + 50)

    def removeSettingsWindow(self):
        self.settingsWindow = None

    def restartApp(self):
        QCoreApplication.exit(42)

    def closeAll(self):
        for cw in self.camWindows:
            cw.close()

        if self.settingsWindow != None:
            self.settingsWindow.close()

        if self.inSysTray:
            self.trayIcon.setVisible(False)
        else:
            self.mainWindow.setVisible(False)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setQuitOnLastWindowClosed(False)

    signal.signal(signal.SIGINT, signal.SIG_DFL)

    inSysTray = QSystemTrayIcon.isSystemTrayAvailable()
    if ("windowed" in sys.argv) or ("--windowed" in sys.argv) or ("-w" in sys.argv):
        inSysTray = False

    tray = OctoTray(app, inSysTray)
    rc = app.exec_()

    while rc == 42:
        tray.closeAll()
        tray = OctoTray(app, inSysTray)
        rc = app.exec_()

    sys.exit(rc)