text: #!/usr/bin/env python
  #
  # Electrum - lightweight Bitcoin client
  #
  # Permission is hereby granted, free of charge, to any person
  # obtaining a copy of this software and associated documentation files
  # (the "Software"), to deal in the Software without restriction,
  # including without limitation the rights to use, copy, modify, merge,
  # publish, distribute, sublicense, and/or sell copies of the Software,
  # and to permit persons to whom the Software is furnished to do so,
  # subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be
  # included in all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  import platform
  import sys
  import traceback
  
  from PyQt5.QtCore import QObject
  import PyQt5.QtCore as QtCore
  from PyQt5.QtGui import QIcon
  from PyQt5.QtWidgets import *
  
  from electrum_dash.i18n import _
  from electrum_dash.base_crash_reporter import BaseCrashReporter
  from .util import MessageBoxMixin
  
  
  class Exception_Window(BaseCrashReporter, QWidget, MessageBoxMixin):
      _active_window = None
  
      def __init__(self, main_window, exctype, value, tb):
          BaseCrashReporter.__init__(self, exctype, value, tb)
          self.main_window = main_window
          QWidget.__init__(self)
          self.setWindowTitle('Dash Electrum - ' + _('An Error Occurred'))
          self.setMinimumSize(600, 300)
  
          main_box = QVBoxLayout()
  
          heading = QLabel('<h2>' + BaseCrashReporter.CRASH_TITLE + '</h2>')
          main_box.addWidget(heading)
          main_box.addWidget(QLabel(BaseCrashReporter.CRASH_MESSAGE))
  
          main_box.addWidget(QLabel(BaseCrashReporter.REQUEST_HELP_MESSAGE))
  
          collapse_info = QPushButton(_("Show report contents"))
          collapse_info.clicked.connect(
              lambda: self.msg_box(QMessageBox.NoIcon,
                                   self, _("Report contents"), self.get_report_string()))
  
          main_box.addWidget(collapse_info)
  
          main_box.addWidget(QLabel(BaseCrashReporter.DESCRIBE_ERROR_MESSAGE))
  
          self.description_textfield = QTextEdit()
          self.description_textfield.setFixedHeight(50)
          main_box.addWidget(self.description_textfield)
  
          main_box.addWidget(QLabel(BaseCrashReporter.ASK_CONFIRM_SEND))
  
          buttons = QHBoxLayout()
  
          report_button = QPushButton(_('Send Bug Report'))
          report_button.clicked.connect(self.send_report)
          report_button.setIcon(QIcon(":icons/tab_send.png"))
          buttons.addWidget(report_button)
  
          never_button = QPushButton(_('Never'))
          never_button.clicked.connect(self.show_never)
          buttons.addWidget(never_button)
  
          close_button = QPushButton(_('Not Now'))
          close_button.clicked.connect(self.close)
          buttons.addWidget(close_button)
  
          main_box.addLayout(buttons)
  
          self.setLayout(main_box)
          self.show()
  
      def send_report(self):
          try:
              response = BaseCrashReporter.send_report(self)
          except BaseException as e:
              traceback.print_exc(file=sys.stderr)
              self.main_window.show_critical(_('There was a problem with the automatic reporting:') + '\n' +
                                             str(e) + '\n' +
                                             _("Please report this issue manually."))
              return
          QMessageBox.about(self, _("Crash report"), response.text)
          self.close()
  
      def on_close(self):
          Exception_Window._active_window = None
          sys.__excepthook__(*self.exc_args)
          self.close()
  
      def show_never(self):
          self.main_window._auto_crash_reports.setChecked(False)
          self.main_window.auto_crash_reports(False)
          self.close()
  
      def closeEvent(self, event):
          self.on_close()
          event.accept()
  
      def get_user_description(self):
          return self.description_textfield.toPlainText()
  
      def get_wallet_type(self):
          return self.main_window.wallet.wallet_type
  
      def get_os_version(self):
          return platform.platform()
  
  
  def _show_window(*args):
      if not Exception_Window._active_window:
          Exception_Window._active_window = Exception_Window(*args)
  
  
  class Exception_Hook(QObject):
      _report_exception = QtCore.pyqtSignal(object, object, object, object)
  
      def __init__(self, main_window, *args, **kwargs):
          super(Exception_Hook, self).__init__(*args, **kwargs)
          if not main_window.config.get(BaseCrashReporter.config_key, default=False):
              if main_window._old_excepthook:
                  sys.excepthook = main_window._old_excepthook
              return
          self.main_window = main_window
          main_window._old_excepthook = sys.excepthook
          sys.excepthook = self.handler
          self._report_exception.connect(_show_window)
  
      def handler(self, *args):
          self._report_exception.emit(self.main_window, *args)
  