111 lines
3.6 KiB
Python
111 lines
3.6 KiB
Python
from __future__ import print_function
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import sys
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import math
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from PyQt4.QtGui import (QPushButton, QLineEdit, QSizePolicy, QRegExpValidator, QLabel,
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QApplication, QWidget, QGridLayout, QVBoxLayout, QHBoxLayout)
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from PyQt4.QtCore import QObject, SIGNAL, QRegExp, Qt
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class PinButton(QPushButton):
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def __init__(self, password, encoded_value):
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super(PinButton, self).__init__('?')
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self.password = password
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self.encoded_value = encoded_value
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QObject.connect(self, SIGNAL('clicked()'), self._pressed)
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def _pressed(self):
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self.password.setText(self.password.text() + str(self.encoded_value))
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self.password.setFocus()
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class PinMatrixWidget(QWidget):
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'''
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Displays widget with nine blank buttons and password box.
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Encodes button clicks into sequence of numbers for passing
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into PinAck messages of TREZOR.
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show_strength=True may be useful for entering new PIN
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'''
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def __init__(self, show_strength=True, parent=None):
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super(PinMatrixWidget, self).__init__(parent)
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self.password = QLineEdit()
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self.password.setValidator(QRegExpValidator(QRegExp('[1-9]+'), None))
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self.password.setEchoMode(QLineEdit.Password)
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QObject.connect(self.password, SIGNAL('textChanged(QString)'), self._password_changed)
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self.strength = QLabel()
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self.strength.setMinimumWidth(75)
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self.strength.setAlignment(Qt.AlignCenter)
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self._set_strength(0)
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grid = QGridLayout()
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grid.setSpacing(0)
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for y in range(3)[::-1]:
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for x in range(3):
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button = PinButton(self.password, x + y * 3 + 1)
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button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
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button.setFocusPolicy(Qt.NoFocus)
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grid.addWidget(button, 3 - y, x)
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hbox = QHBoxLayout()
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hbox.addWidget(self.password)
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if show_strength:
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hbox.addWidget(self.strength)
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vbox = QVBoxLayout()
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vbox.addLayout(grid)
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vbox.addLayout(hbox)
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self.setLayout(vbox)
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def _set_strength(self, strength):
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if strength < 3000:
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self.strength.setText('weak')
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self.strength.setStyleSheet("QLabel { color : #d00; }")
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elif strength < 60000:
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self.strength.setText('fine')
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self.strength.setStyleSheet("QLabel { color : #db0; }")
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elif strength < 360000:
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self.strength.setText('strong')
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self.strength.setStyleSheet("QLabel { color : #0a0; }")
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else:
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self.strength.setText('ULTIMATE')
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self.strength.setStyleSheet("QLabel { color : #000; font-weight: bold;}")
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def _password_changed(self, password):
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self._set_strength(self.get_strength())
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def get_strength(self):
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digits = len(set(str(self.password.text())))
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strength = math.factorial(9) / math.factorial(9 - digits)
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return strength
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def get_value(self):
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return self.password.text()
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if __name__ == '__main__':
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'''
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Demo application showing PinMatrix widget in action
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'''
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a = QApplication(sys.argv)
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matrix = PinMatrixWidget()
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def clicked():
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print("PinMatrix value is", matrix.get_value())
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print("Possible button combinations:", matrix.get_strength())
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sys.exit()
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ok = QPushButton('OK')
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QObject.connect(ok, SIGNAL('clicked()'), clicked)
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vbox = QVBoxLayout()
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vbox.addWidget(matrix)
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vbox.addWidget(ok)
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w = QWidget()
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w.setLayout(vbox)
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w.move(100, 100)
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w.show()
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a.exec_()
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