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# -*- coding: utf-8 -*-
"""
OnionShare | https://onionshare.org/
Copyright (C) 2014-2018 Micah Lee <micah@micahflee.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import time
from PyQt5 import QtCore, QtWidgets, QtGui
from onionshare import strings
class Download(object):
def __init__(self, common, download_id, total_bytes):
self.common = common
self.download_id = download_id
self.started = time.time()
self.total_bytes = total_bytes
self.downloaded_bytes = 0
# Progress bar
self.progress_bar = QtWidgets.QProgressBar()
self.progress_bar.setTextVisible(True)
self.progress_bar.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.progress_bar.setAlignment(QtCore.Qt.AlignHCenter)
self.progress_bar.setMinimum(0)
self.progress_bar.setMaximum(total_bytes)
self.progress_bar.setValue(0)
self.progress_bar.setStyleSheet(self.common.css['downloads_uploads_progress_bar'])
self.progress_bar.total_bytes = total_bytes
# Start at 0
self.update(0)
def update(self, downloaded_bytes):
self.downloaded_bytes = downloaded_bytes
self.progress_bar.setValue(downloaded_bytes)
if downloaded_bytes == self.progress_bar.total_bytes:
pb_fmt = strings._('gui_download_upload_progress_complete').format(
self.common.format_seconds(time.time() - self.started))
else:
elapsed = time.time() - self.started
if elapsed < 10:
# Wait a couple of seconds for the download rate to stabilize.
# This prevents a "Windows copy dialog"-esque experience at
# the beginning of the download.
pb_fmt = strings._('gui_download_upload_progress_starting').format(
self.common.human_readable_filesize(downloaded_bytes))
else:
pb_fmt = strings._('gui_download_upload_progress_eta').format(
self.common.human_readable_filesize(downloaded_bytes),
self.estimated_time_remaining)
self.progress_bar.setFormat(pb_fmt)
def cancel(self):
self.progress_bar.setFormat(strings._('gui_canceled'))
@property
def estimated_time_remaining(self):
return self.common.estimated_time_remaining(self.downloaded_bytes,
self.total_bytes,
self.started)
class Downloads(QtWidgets.QScrollArea):
"""
The downloads chunk of the GUI. This lists all of the active download
progress bars.
"""
def __init__(self, common):
super(Downloads, self).__init__()
self.common = common
self.downloads = {}
self.setWindowTitle(strings._('gui_downloads'))
self.setWidgetResizable(True)
self.setMinimumHeight(150)
self.setMinimumWidth(350)
self.setWindowIcon(QtGui.QIcon(common.get_resource_path('images/logo.png')))
self.setWindowFlags(QtCore.Qt.Sheet | QtCore.Qt.WindowTitleHint | QtCore.Qt.WindowSystemMenuHint | QtCore.Qt.CustomizeWindowHint)
self.vbar = self.verticalScrollBar()
self.vbar.rangeChanged.connect(self.resizeScroll)
downloads_label = QtWidgets.QLabel(strings._('gui_downloads'))
downloads_label.setStyleSheet(self.common.css['downloads_uploads_label'])
self.no_downloads_label = QtWidgets.QLabel(strings._('gui_no_downloads'))
self.clear_history_button = QtWidgets.QPushButton(strings._('gui_clear_history'))
self.clear_history_button.clicked.connect(self.reset)
self.clear_history_button.hide()
self.downloads_layout = QtWidgets.QVBoxLayout()
widget = QtWidgets.QWidget()
layout = QtWidgets.QVBoxLayout()
layout.addWidget(downloads_label)
layout.addWidget(self.no_downloads_label)
layout.addWidget(self.clear_history_button)
layout.addLayout(self.downloads_layout)
layout.addStretch()
widget.setLayout(layout)
self.setWidget(widget)
def resizeScroll(self, minimum, maximum):
"""
Scroll to the bottom of the window when the range changes.
"""
self.vbar.setValue(maximum)
def add(self, download_id, total_bytes):
"""
Add a new download progress bar.
"""
# Hide the no_downloads_label
self.no_downloads_label.hide()
# Show the clear_history_button
self.clear_history_button.show()
# Add it to the list
download = Download(self.common, download_id, total_bytes)
self.downloads[download_id] = download
self.downloads_layout.addWidget(download.progress_bar)
def update(self, download_id, downloaded_bytes):
"""
Update the progress of a download progress bar.
"""
self.downloads[download_id].update(downloaded_bytes)
def cancel(self, download_id):
"""
Update a download progress bar to show that it has been canceled.
"""
self.downloads[download_id].cancel()
def reset(self):
"""
Reset the downloads back to zero
"""
for download in self.downloads.values():
self.downloads_layout.removeWidget(download.progress_bar)
download.progress_bar.close()
self.downloads = {}
self.no_downloads_label.show()
self.clear_history_button.hide()
self.resize(self.sizeHint())
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