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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from ui_downloadwidget import Ui_DownloadWidget
from PySide6.QtWebEngineCore import QWebEngineDownloadRequest
from PySide6.QtWidgets import QFrame, QWidget
from PySide6.QtGui import QIcon
from PySide6.QtCore import QElapsedTimer, Signal, Slot
def with_unit(bytes):
if bytes < (1 << 10):
return f"{bytes} B"
if bytes < (1 << 20):
s = bytes / (1 << 10)
return f"{int(s)} KiB"
if bytes < (1 << 30):
s = bytes / (1 << 20)
return f"{int(s)} MiB"
s = bytes / (1 << 30)
return f"{int(s)} GiB"
class DownloadWidget(QFrame):
"""Displays one ongoing or finished download (QWebEngineDownloadRequest)."""
# This signal is emitted when the user indicates that they want to remove
# this download from the downloads list.
remove_clicked = Signal(QWidget)
def __init__(self, download, parent=None):
super().__init__(parent)
self._download = download
self._time_added = QElapsedTimer()
self._time_added.start()
self._cancel_icon = QIcon.fromTheme(QIcon.ThemeIcon.ProcessStop,
QIcon(":process-stop.png"))
self._remove_icon = QIcon.fromTheme(QIcon.ThemeIcon.EditClear,
QIcon(":edit-clear.png"))
self._ui = Ui_DownloadWidget()
self._ui.setupUi(self)
self._ui.m_dstName.setText(self._download.downloadFileName())
self._ui.m_srcUrl.setText(self._download.url().toDisplayString())
self._ui.m_cancelButton.clicked.connect(self._canceled)
self._download.totalBytesChanged.connect(self.update_widget)
self._download.receivedBytesChanged.connect(self.update_widget)
self._download.stateChanged.connect(self.update_widget)
self.update_widget()
@Slot()
def _canceled(self):
state = self._download.state()
if state == QWebEngineDownloadRequest.DownloadInProgress:
self._download.cancel()
else:
self.remove_clicked.emit(self)
def update_widget(self):
total_bytes_v = self._download.totalBytes()
total_bytes = with_unit(total_bytes_v)
received_bytes_v = self._download.receivedBytes()
received_bytes = with_unit(received_bytes_v)
elapsed = self._time_added.elapsed()
bytes_per_second_v = received_bytes_v / elapsed * 1000 if elapsed else 0
bytes_per_second = with_unit(bytes_per_second_v)
state = self._download.state()
progress_bar = self._ui.m_progressBar
if state == QWebEngineDownloadRequest.DownloadInProgress:
if total_bytes_v > 0:
progress = round(100 * received_bytes_v / total_bytes_v)
progress_bar.setValue(progress)
progress_bar.setDisabled(False)
fmt = f"%p% - {received_bytes} of {total_bytes} downloaded - {bytes_per_second}/s"
progress_bar.setFormat(fmt)
else:
progress_bar.setValue(0)
progress_bar.setDisabled(False)
fmt = f"unknown size - {received_bytes} downloaded - {bytes_per_second}/s"
progress_bar.setFormat(fmt)
elif state == QWebEngineDownloadRequest.DownloadCompleted:
progress_bar.setValue(100)
progress_bar.setDisabled(True)
fmt = f"completed - {received_bytes} downloaded - {bytes_per_second}/s"
progress_bar.setFormat(fmt)
elif state == QWebEngineDownloadRequest.DownloadCancelled:
progress_bar.setValue(0)
progress_bar.setDisabled(True)
fmt = f"cancelled - {received_bytes} downloaded - {bytes_per_second}/s"
progress_bar.setFormat(fmt)
elif state == QWebEngineDownloadRequest.DownloadInterrupted:
progress_bar.setValue(0)
progress_bar.setDisabled(True)
fmt = "interrupted: " + self._download.interruptReasonString()
progress_bar.setFormat(fmt)
if state == QWebEngineDownloadRequest.DownloadInProgress:
self._ui.m_cancelButton.setIcon(self._cancel_icon)
self._ui.m_cancelButton.setToolTip("Stop downloading")
else:
self._ui.m_cancelButton.setIcon(self._remove_icon)
self._ui.m_cancelButton.setToolTip("Remove from list")
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