From 706807e0b642f8245498fdb3e66a03ae94ec0494 Mon Sep 17 00:00:00 2001
From: slush0 <slush@satoshilabs.com>
Date: Thu, 10 Jul 2014 00:02:34 +0200
Subject: [PATCH] Removed debugging print

---
 trezorlib/qt/pinmatrix.py | 110 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 trezorlib/qt/pinmatrix.py

diff --git a/trezorlib/qt/pinmatrix.py b/trezorlib/qt/pinmatrix.py
new file mode 100644
index 0000000..0ce8bef
--- /dev/null
+++ b/trezorlib/qt/pinmatrix.py
@@ -0,0 +1,110 @@
+import sys
+import math
+import operator
+from PyQt4.Qt import QApplication, QWidget, QGridLayout, QVBoxLayout, QHBoxLayout
+from PyQt4.QtGui import QPushButton, QLineEdit, QSizePolicy, QRegExpValidator, QLabel
+from PyQt4.QtCore import QObject, SIGNAL, QRegExp, Qt
+
+class PinButton(QPushButton):
+    def __init__(self, password, encoded_value):
+        super(PinButton, self).__init__('?')
+        self.password = password
+        self.encoded_value = encoded_value
+
+        QObject.connect(self, SIGNAL('clicked()'), self._pressed)
+
+    def _pressed(self):
+        self.password.setText(self.password.text() + str(self.encoded_value))
+        self.password.setFocus()
+
+class PinMatrixWidget(QWidget):
+    '''
+        Displays widget with nine blank buttons and password box.
+        Encodes button clicks into sequence of numbers for passing
+        into PinAck messages of Trezor.
+
+        show_strength=True may be useful for entering new PIN
+    '''
+    def __init__(self, show_strength=True, parent=None):
+        super(PinMatrixWidget, self).__init__(parent)
+        
+        self.password = QLineEdit()
+        self.password.setValidator(QRegExpValidator(QRegExp('[1-9]+'), None))
+        self.password.setEchoMode(QLineEdit.Password)
+        QObject.connect(self.password, SIGNAL('textChanged(QString)'), self._password_changed)
+
+        self.strength = QLabel()
+        self.strength.setMinimumWidth(75)
+        self.strength.setAlignment(Qt.AlignCenter)
+        self._set_strength(0)
+
+        grid = QGridLayout()
+        grid.setSpacing(0)
+        for y in range(3)[::-1]:
+            for x in range(3):
+                button = PinButton(self.password, x + y * 3 + 1)
+                button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
+                button.setFocusPolicy(Qt.NoFocus)
+                grid.addWidget(button, 3 - y, x)
+
+        hbox = QHBoxLayout()
+        hbox.addWidget(self.password)
+        if show_strength:
+            hbox.addWidget(self.strength)
+
+        vbox = QVBoxLayout()
+        vbox.addLayout(grid)
+        vbox.addLayout(hbox)
+        self.setLayout(vbox)
+
+    def _set_strength(self, strength):
+        if strength < 3000:
+            self.strength.setText('weak')
+            self.strength.setStyleSheet("QLabel { color : #d00; }")
+        elif strength < 60000:
+            self.strength.setText('fine')
+            self.strength.setStyleSheet("QLabel { color : #db0; }")
+        elif strength < 360000:
+            self.strength.setText('strong')
+            self.strength.setStyleSheet("QLabel { color : #0a0; }")
+        else:
+            self.strength.setText('ULTIMATE')
+            self.strength.setStyleSheet("QLabel { color : #000; font-weight: bold;}")
+
+    def _password_changed(self, password):
+        self._set_strength(self.get_strength())
+
+    def get_strength(self):
+        digits = len(set(str(self.password.text())))
+        strength = math.factorial(9) / math.factorial(9 - digits)
+        return strength
+
+    def get_value(self):
+        return self.password.text()
+
+if __name__ == '__main__':
+    '''
+        Demo application showing PinMatrix widget in action
+    '''
+    a = QApplication(sys.argv)
+
+    matrix = PinMatrixWidget()
+
+    def clicked():
+        print "PinMatrix value is", matrix.get_value()
+        print "Possible button combinations:", matrix.get_strength()
+        sys.exit()
+
+    ok = QPushButton('OK')
+    QObject.connect(ok, SIGNAL('clicked()'), clicked)
+
+    vbox = QVBoxLayout()
+    vbox.addWidget(matrix)
+    vbox.addWidget(ok)
+
+    w = QWidget()
+    w.setLayout(vbox)
+    w.move(100, 100)
+    w.show()
+
+    a.exec_()