SomberNight
c1dbcab9bb
This commit ports the work of EchterAgo and cculianu from Electron-Cash, to implement a new toolchain to scan qr codes. Previously, on Linux and Win, we have been using zbar to access the camera and read qrcodes; and on macOS we used CalinsQRReader (an objective-C project by cculianu). The new toolchain added here can use QtMultimedia to access the camera, and then feed that image into zbar. When used this way, zbar needs fewer dependencies and is easier to compile, in particular it can be compiled for macOS. The new toolchain works on all three platforms, with some caveats (see code comments in related commits) -- so we also keep the end-to-end zbar toolchain; but at least we can drop CalinsQRReader. The related changes in Electron-Cash are spread over 50+ commits (several PRs and direct pushes to master), but see in particular: https://github.com/Electron-Cash/Electron-Cash/pull/1376 some other interesting links: https://github.com/Electron-Cash/Electron-Cash/commit/b2b737001c8cc41a38fa580ea252a6d24e08f5d5 https://github.com/Electron-Cash/Electron-Cash/commit/163224cf1fad3af63f2d3cbe68a34fb8ff279af6 https://github.com/Electron-Cash/Electron-Cash/commit/3b31e0fcb13f67646228ff42c0dd39d2a0912291 https://github.com/Electron-Cash/Electron-Cash/commit/eda015908e9d6ea9a0adfbda9db55b929c0926ba https://github.com/Electron-Cash/Electron-Cash/pull/1545 https://github.com/Electron-Cash/Electron-Cash/commit/052aa06c23b939adcea07c701f70ae28ebcf9e0a
123 lines
4.2 KiB
Python
123 lines
4.2 KiB
Python
from PyQt5.QtWidgets import QFileDialog
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from electrum.i18n import _
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from electrum.plugin import run_hook
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from electrum.simple_config import SimpleConfig
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from electrum.util import UserFacingException
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from electrum.logging import Logger
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from .util import ButtonsTextEdit, MessageBoxMixin, ColorScheme, getOpenFileName
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class ShowQRTextEdit(ButtonsTextEdit):
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def __init__(self, text=None, *, config: SimpleConfig):
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ButtonsTextEdit.__init__(self, text)
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self.config = config
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self.setReadOnly(True)
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icon = "qrcode_white.png" if ColorScheme.dark_scheme else "qrcode.png"
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self.addButton(icon, self.qr_show, _("Show as QR code"))
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run_hook('show_text_edit', self)
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def qr_show(self):
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from .qrcodewidget import QRDialog
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try:
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s = str(self.toPlainText())
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except:
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s = self.toPlainText()
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QRDialog(
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data=s,
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parent=self,
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config=self.config,
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).exec_()
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def contextMenuEvent(self, e):
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m = self.createStandardContextMenu()
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m.addAction(_("Show as QR code"), self.qr_show)
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m.exec_(e.globalPos())
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class ScanQRTextEdit(ButtonsTextEdit, MessageBoxMixin, Logger):
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def __init__(self, text="", allow_multi=False, *, config: SimpleConfig):
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ButtonsTextEdit.__init__(self, text)
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Logger.__init__(self)
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self.allow_multi = allow_multi
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self.config = config
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self.setReadOnly(False)
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self.addButton("file.png", self.file_input, _("Read file"))
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icon = "camera_white.png" if ColorScheme.dark_scheme else "camera_dark.png"
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self.addButton(icon, self.qr_input, _("Read QR code"))
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run_hook('scan_text_edit', self)
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def file_input(self):
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fileName = getOpenFileName(
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parent=self,
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title='select file',
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config=self.config,
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)
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if not fileName:
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return
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try:
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try:
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with open(fileName, "r") as f:
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data = f.read()
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except UnicodeError as e:
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with open(fileName, "rb") as f:
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data = f.read()
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data = data.hex()
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except BaseException as e:
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self.show_error(_('Error opening file') + ':\n' + repr(e))
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else:
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self.setText(data)
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# Due to the asynchronous nature of the qr reader we need to keep the
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# dialog instance as member variable to prevent reentrancy/multiple ones
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# from being presented at once.
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qr_dialog = None
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def qr_input(self, *, callback=None) -> None:
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if self.qr_dialog:
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self.logger.warning("QR dialog is already presented, ignoring.")
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return
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from . import ElectrumGui
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if ElectrumGui.warn_if_cant_import_qrreader(self):
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return
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from .qrreader import QrReaderCameraDialog, CameraError, MissingQrDetectionLib
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try:
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self.qr_dialog = QrReaderCameraDialog(parent=self.top_level_window(), config=self.config)
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def _on_qr_reader_finished(success: bool, error: str, data):
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if self.qr_dialog:
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self.qr_dialog.deleteLater()
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self.qr_dialog = None
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if not success:
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if error:
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self.show_error(error)
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return
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if not data:
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data = ''
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if self.allow_multi:
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new_text = self.text() + data + '\n'
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else:
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new_text = data
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self.setText(new_text)
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if callback and success:
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callback(data)
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self.qr_dialog.qr_finished.connect(_on_qr_reader_finished)
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self.qr_dialog.start_scan(self.config.get_video_device())
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except (MissingQrDetectionLib, CameraError) as e:
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self.qr_dialog = None
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self.show_error(str(e))
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except Exception as e:
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self.logger.exception('camera error')
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self.qr_dialog = None
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self.show_error(repr(e))
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def contextMenuEvent(self, e):
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m = self.createStandardContextMenu()
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m.addAction(_("Read QR code"), self.qr_input)
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m.exec_(e.globalPos())
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