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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
"""PySide6 Charts example: Simple memory usage viewer"""
import os
import sys
from PySide6.QtCore import QProcess
from PySide6.QtWidgets import QApplication, QMainWindow
from PySide6.QtCharts import QChart, QChartView, QPieSeries
def run_process(command, arguments):
process = QProcess()
process.start(command, arguments)
process.waitForFinished()
std_output = process.readAllStandardOutput().data().decode('utf-8')
return std_output.split('\n')
def get_memory_usage():
result = []
if sys.platform == 'win32':
# Windows: Obtain memory usage in KB from 'tasklist'
for line in run_process('tasklist', [])[3:]:
if len(line) >= 74:
command = line[0:23].strip()
if command.endswith('.exe'):
command = command[0:len(command) - 4]
memory_usage = float(line[64:74].strip().replace(',', '').replace('.', ''))
legend = ''
if memory_usage > 10240:
mb = memory_usage / 1024
legend = f'{command} {mb}M'
else:
legend = f'{command} {memory_usage}K'
result.append([legend, memory_usage])
else:
# Unix: Obtain memory usage percentage from 'ps'
ps_options = ['-e', 'v']
memory_column = 8
command_column = 9
if sys.platform == 'darwin':
ps_options = ['-e', '-v']
memory_column = 11
command_column = 12
for line in run_process('ps', ps_options):
tokens = line.split(None)
if len(tokens) > command_column and "PID" not in tokens: # Percentage and command
command = tokens[command_column]
if not command.startswith('['):
command = os.path.basename(command)
memory_usage = round(float(tokens[memory_column].replace(',', '.')))
legend = f'{command} {memory_usage}%'
result.append([legend, memory_usage])
result.sort(key = lambda x: x[1], reverse=True)
return result
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle('Memory Usage')
memory_usage = get_memory_usage()
if len(memory_usage) > 5:
memory_usage = memory_usage[0:4]
self.series = QPieSeries()
for item in memory_usage:
self.series.append(item[0], item[1])
slice = self.series.slices()[0]
slice.setExploded()
slice.setLabelVisible()
self.chart = QChart()
self.chart.addSeries(self.series)
self._chart_view = QChartView(self.chart)
self.setCentralWidget(self._chart_view)
if __name__ == '__main__':
app = QApplication(sys.argv)
main_win = MainWindow()
available_geometry = main_win.screen().availableGeometry()
size = available_geometry.height() * 3 / 4
main_win.resize(size, size)
main_win.show()
sys.exit(app.exec_())
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