gui/qt/amountedit.py

   1 # -*- coding: utf-8 -*-
   2
   3 from PyQt4.QtCore import *
   4 from PyQt4.QtGui import *
   5
   6 from decimal import Decimal
   7
   8 class MyLineEdit(QLineEdit):
   9
  10     def setFrozen(self, b):
  11         self.setReadOnly(b)
  12         self.setFrame(not b)
  13
  14 class AmountEdit(MyLineEdit):
  15
  16     def __init__(self, base_unit, is_int = False, parent=None):
  17         QLineEdit.__init__(self, parent)
  18         self.base_unit = base_unit
  19         self.textChanged.connect(self.numbify)
  20         self.is_int = is_int
  21         self.is_shortcut = False
  22         self.help_palette = QPalette()
  23
  24     def numbify(self):
  25         text = unicode(self.text()).strip()
  26         if text == '!':
  27             self.is_shortcut = True
  28         pos = self.cursorPosition()
  29         chars = '0123456789'
  30         if not self.is_int: chars +='.'
  31         s = ''.join([i for i in text if i in chars])
  32         if not self.is_int:
  33             if '.' in s:
  34                 p = s.find('.')
  35                 s = s.replace('.','')
  36                 s = s[:p] + '.' + s[p:p+8]
  37         self.setText(s)
  38         self.setCursorPosition(pos)
  39
  40     def paintEvent(self, event):
  41         QLineEdit.paintEvent(self, event)
  42         if self.base_unit:
  43             panel = QStyleOptionFrameV2()
  44             self.initStyleOption(panel)
  45             textRect = self.style().subElementRect(QStyle.SE_LineEditContents, panel, self)
  46             textRect.adjust(2, 0, -10, 0)
  47             painter = QPainter(self)
  48             painter.setPen(self.help_palette.brush(QPalette.Disabled, QPalette.Text).color())
  49             painter.drawText(textRect, Qt.AlignRight | Qt.AlignVCenter, self.base_unit())
  50
  51
  52
  53 class BTCAmountEdit(AmountEdit):
  54
  55     def __init__(self, decimal_point, is_int = False, parent=None):
  56         AmountEdit.__init__(self, self._base_unit, is_int, parent)
  57         self.decimal_point = decimal_point
  58
  59     def _base_unit(self):
  60         p = self.decimal_point()
  61         assert p in [5,8]
  62         return "BTC" if p == 8 else "mBTC"
  63
  64     def get_amount(self):
  65         try:
  66             x = Decimal(str(self.text()))
  67         except:
  68             return None
  69         p = pow(10, self.decimal_point())
  70         return int( p * x )
  71
  72     def setAmount(self, amount):
  73         p = pow(10, self.decimal_point())
  74         x = amount / Decimal(p)
  75         self.setText(str(x))
  76