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multiprocessing.py
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from PyQt5.QtGui import QColor, QPalette, QBrush
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
# noinspection PyUnresolvedReferences
from settings import SettingsDialog
import time
import re
step = [i for i in range(2500, 2500*10000, 2500)]
class Button(QPushButton):
def __init__(self, base, parent=None):
self.ui = base
super(Button, self).__init__(parent)
def mousePressEvent(self, *args, **kwargs):
try:
QPushButton.mousePressEvent(self, *args, **kwargs)
except:
pass
search = int(re.search('\d+$', self.objectName())[0])
if self.objectName().__contains__('Start'):
arg1 = step[search]-2500
arg2 = getattr(self.ui, f'counter{search-1}')
arg3 = getattr(self.ui, f'label{search-1}')
self.ui.active_threads.append(self.ui.threadpool.activeThreadCount() + 1)
if self.ui.active_threads[-1] > self.ui.threadpool.maxThreadCount():
getattr(self.ui, f'counter{search-1}').setPalette(self.ui.red_palette)
else:
getattr(self.ui, f'counter{search-1}').setPalette(self.ui.green_palette)
self.ui.work(arg1, arg2, arg3)
elif self.objectName().__contains__('Stop'):
getattr(self.ui, f'counter{search - 1}').setPalette(self.ui.normal_palette)
arg1 = self.ui
arg2 = f'stop{step[search-1]}'
arg3 = True
setattr(arg1, arg2, arg3)
elif self.objectName().__contains__('Reset'):
class1 = getattr(self.ui, f'label{search-1}')
class1.setText(f"{step[search-1]-2500}")
class WorkerSignals(QObject):
'''
Defines the signals available from a running worker thread.
Supported signals are:
finished
No data
error
`tuple` (exctype, value, traceback.format_exc() )
result
`object` data returned from processing, anything
progress
`int` indicating % progress
'''
progress = pyqtSignal(int)
palette = pyqtSignal(str)
class Worker(QRunnable):
'''
Worker thread
Inherits from QRunnable to handler worker thread setup, signals and wrap-up.
:param callback: The function callback to run on this worker thread. Supplied args and
kwargs will be passed through to the runner.
:type callback: function
:param args: Arguments to pass to the callback function
:param kwargs: Keywords to pass to the callback function
'''
def __init__(self, fn, upto, label, *args, **kwargs):
super(Worker, self).__init__()
# Store constructor arguments (re-used for processing)
self.fn = fn
self.label = label
self.upto = upto
self.signals = WorkerSignals()
@pyqtSlot()
def run(self):
'''
Initialise the runner function with passed args, kwargs.
'''
# Retrieve args/kwargs here; and fire processing using them
self.fn(self.upto, self.signals.palette, self.signals.progress)
class MainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(MainWindow, self).__init__(*args, **kwargs)
self.active_threads = []
self.counters = []
self.setupUi()
self.show()
self.threadpool = QThreadPool()
def setupUi(self):
self.resize(QSize(826, 330))
self.setWindowTitle("PyQt5: Multithreading Example")
self.centralwidget = QWidget(self)
self.gridLayout1 = QGridLayout(self.centralwidget)
self.gridLayout1.setContentsMargins(0, 0, 0, 0)
self.scrollArea = QScrollArea(self.centralwidget)
self.scrollArea.setWidgetResizable(True)
self.scrollAreaWidget = QWidget()
self.scrollAreaWidget.setGeometry(0, 0, 1000, 1000)
self.gridLayout2 = QFormLayout(self.scrollAreaWidget)
self.scrollArea.setWidget(self.scrollAreaWidget)
self.frame = QFrame(self.scrollAreaWidget)
self.gridLayout = QGridLayout(self.frame)
self.gridLayout.setContentsMargins(-1, -1, 320, -1)
self.gridLayout.setSizeConstraint(QLayout.SetFixedSize)
self.gridLayout2.addWidget(self.frame)
self.normal_palette = QPalette()
brush = QBrush(QColor(0, 0, 0))
brush.setStyle(Qt.SolidPattern)
self.normal_palette.setBrush(QPalette.Active, QPalette.WindowText, brush)
brush = QBrush(QColor(0, 0, 0))
brush.setStyle(Qt.SolidPattern)
self.normal_palette.setBrush(QPalette.Inactive, QPalette.WindowText, brush)
brush = QBrush(QColor(120, 120, 120))
brush.setStyle(Qt.SolidPattern)
self.normal_palette.setBrush(QPalette.Disabled, QPalette.WindowText, brush)
self.green_palette = QPalette()
brush = QBrush(QColor(19, 138, 15))
brush.setStyle(Qt.SolidPattern)
self.green_palette.setBrush(QPalette.Active, QPalette.WindowText, brush)
brush = QBrush(QColor(19, 138, 15))
brush.setStyle(Qt.SolidPattern)
self.green_palette.setBrush(QPalette.Inactive, QPalette.WindowText, brush)
brush = QBrush(QColor(120, 120, 120))
brush.setStyle(Qt.SolidPattern)
self.green_palette.setBrush(QPalette.Disabled, QPalette.WindowText, brush)
self.red_palette = QPalette()
brush = QBrush(QColor(200, 0, 26))
brush.setStyle(Qt.SolidPattern)
self.red_palette.setBrush(QPalette.Active, QPalette.WindowText, brush)
brush = QBrush(QColor(200, 0, 26))
brush.setStyle(Qt.SolidPattern)
self.red_palette.setBrush(QPalette.Inactive, QPalette.WindowText, brush)
brush = QBrush(QColor(120, 120, 120))
brush.setStyle(Qt.SolidPattern)
self.red_palette.setBrush(QPalette.Disabled, QPalette.WindowText, brush)
self.setCounters(10)
self.gridLayout1.addWidget(self.scrollArea)
self.setCentralWidget(self.centralwidget)
self.menubar = QMenuBar(self)
self.menubar.setGeometry(QRect(0, 0, 491, 21))
self.editMenu = QMenu(self.menubar)
self.editMenu.setTitle("Edit")
self.config = QAction(self)
self.config.setText("Configure")
self.config.triggered.connect(lambda: SettingsDialog(self))
self.startAll = QAction(self)
self.startAll.setText("Start All")
self.startAll.triggered.connect(self.startAllCounters)
self.startAll.setShortcut("Ctrl+S")
self.stopAll = QAction(self)
self.stopAll.setText("Stop All")
self.stopAll.triggered.connect(self.stopAllCounters)
self.stopAll.setShortcut("Ctrl+T")
self.resetAll = QAction(self)
self.resetAll.setText("Reset All")
self.resetAll.triggered.connect(self.resetAllCounters)
self.resetAll.setShortcut("Ctrl+R")
self.setMenuBar(self.menubar)
self.editMenu.addAction(self.config)
self.editMenu.addSeparator()
self.editMenu.addAction(self.startAll)
self.editMenu.addAction(self.stopAll)
self.editMenu.addAction(self.resetAll)
self.menubar.addAction(self.editMenu.menuAction())
self.statusbar = QStatusBar(self)
self.setStatusBar(self.statusbar)
QMetaObject.connectSlotsByName(self)
def setCounters(self, amount: int):
new = self.counters.copy()
for i in self.counters:
new.remove(i)
getCounter = getattr(self, f'counter{i}')
getLabel = getattr(self, f'label{i}')
getStart = getattr(self, f'start{i}')
getStop = getattr(self, f'stopButton{i}')
getReset = getattr(self, f'reset{i}')
self.gridLayout.removeWidget(getCounter)
self.gridLayout.removeWidget(getLabel)
self.gridLayout.removeWidget(getStart)
self.gridLayout.removeWidget(getStop)
self.gridLayout.removeWidget(getReset)
getCounter.deleteLater()
getLabel.deleteLater()
getStart.deleteLater()
getStop.deleteLater()
getReset.deleteLater()
delattr(self, f'counter{i}')
delattr(self, f'label{i}')
delattr(self, f'start{i}')
delattr(self, f'stopButton{i}')
delattr(self, f'reset{i}')
self.counters = new
for i in range(amount):
self.counters.append(i)
setattr(self, f'counter{i}', QLabel(self.centralwidget))
setattr(self, f'label{i}', QLabel(self.centralwidget))
setattr(self, f'start{i}', Button(self, self.centralwidget))
setattr(self, f'stopButton{i}', Button(self, self.centralwidget))
setattr(self, f'reset{i}', Button(self, self.centralwidget))
setattr(self, f'stop{step[i]}', False)
getCounter = getattr(self, f'counter{i}')
getLabel = getattr(self, f'label{i}')
getStart = getattr(self, f'start{i}')
getStop = getattr(self, f'stopButton{i}')
getReset = getattr(self, f'reset{i}')
self.gridLayout.addWidget(getCounter, i, 0, 1, 1)
self.gridLayout.addWidget(getLabel, i, 1, 1, 1)
self.gridLayout.addWidget(getStart, i, 2, 1, 1)
self.gridLayout.addWidget(getStop, i, 3, 1, 1)
self.gridLayout.addWidget(getReset, i, 4, 1, 1)
getCounter.setText(f"Process {i + 1} ({step[i] - 2500}-{step[i]})")
getLabel.setText(f"{step[i] - 2500}")
getStart.setText("Start")
getStop.setText("Stop")
getReset.setText("Reset")
getStart.setObjectName(f"Start {i + 1}")
getStop.setObjectName(f"Stop {i + 1}")
getReset.setObjectName(f"Reset {i + 1}")
## Connecting the buttons through .connect() will not work as it will always use the last one on the list so therefore
## we create a Button class and use a mousePressEvent() method and get the object name to see what type it is and where.
def startAllCounters(self):
for i in self.counters:
getStart = getattr(self, f'start{i}')
getStart.mousePressEvent(QPushButton.mousePressEvent)
def stopAllCounters(self):
for i in self.counters:
getStop = getattr(self, f'stopButton{i}')
getStop.mousePressEvent(QPushButton.mousePressEvent)
def resetAllCounters(self):
for i in self.counters:
getReset = getattr(self, f'reset{i}')
getReset.mousePressEvent(QPushButton.mousePressEvent)
def task(self, upto, palette, counter):
to_start = upto-2500
upto = upto+1
for i in range(to_start, upto):
palette.emit("green_palette")
if getattr(self, f'stop{upto-1}'):
break
## write code
## here
time.sleep(0.005)
try:
counter.emit(i)
except AttributeError:
break
palette.emit("normal_palette")
setattr(self, f'stop{upto-1}', False)
def updateCounter(self, text, label):
label.setText(str(text))
def updatePalette(self, name, label):
label.setPalette(getattr(self, name))
def work(self, upto, counterlabel, label):
setattr(self, f'stop{upto}', False)
# Pass the function to execute
worker = Worker(self.task, upto, label)
worker.signals.progress.connect(lambda x: self.updateCounter(x, label))
worker.signals.palette.connect(lambda x: self.updatePalette(x, counterlabel))
# Execute
self.threadpool.start(worker)
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
ui = MainWindow()
sys.exit(app.exec_())