mirror of
https://github.com/LBRYFoundation/LBRY-Vault.git
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131 lines
4.3 KiB
Python
131 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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from decimal import Decimal
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from typing import Union
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from PyQt5.QtCore import pyqtSignal, Qt
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from PyQt5.QtGui import QPalette, QPainter
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from PyQt5.QtWidgets import (QLineEdit, QStyle, QStyleOptionFrame)
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from .util import char_width_in_lineedit, ColorScheme
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from electrum.util import (format_satoshis_plain, decimal_point_to_base_unit_name,
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FEERATE_PRECISION, quantize_feerate)
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class FreezableLineEdit(QLineEdit):
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frozen = pyqtSignal()
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def setFrozen(self, b):
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self.setReadOnly(b)
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self.setFrame(not b)
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self.frozen.emit()
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class AmountEdit(FreezableLineEdit):
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shortcut = pyqtSignal()
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def __init__(self, base_unit, is_int=False, parent=None):
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QLineEdit.__init__(self, parent)
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# This seems sufficient for hundred-BTC amounts with 8 decimals
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self.setFixedWidth(16 * char_width_in_lineedit())
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self.base_unit = base_unit
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self.textChanged.connect(self.numbify)
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self.is_int = is_int
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self.is_shortcut = False
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self.extra_precision = 0
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def decimal_point(self):
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return 8
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def max_precision(self):
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return self.decimal_point() + self.extra_precision
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def numbify(self):
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text = self.text().strip()
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if text == '!':
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self.shortcut.emit()
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return
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pos = self.cursorPosition()
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chars = '0123456789'
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if not self.is_int: chars +='.'
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s = ''.join([i for i in text if i in chars])
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if not self.is_int:
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if '.' in s:
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p = s.find('.')
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s = s.replace('.','')
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s = s[:p] + '.' + s[p:p+self.max_precision()]
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self.setText(s)
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# setText sets Modified to False. Instead we want to remember
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# if updates were because of user modification.
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self.setModified(self.hasFocus())
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self.setCursorPosition(pos)
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def paintEvent(self, event):
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QLineEdit.paintEvent(self, event)
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if self.base_unit:
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panel = QStyleOptionFrame()
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self.initStyleOption(panel)
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textRect = self.style().subElementRect(QStyle.SE_LineEditContents, panel, self)
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textRect.adjust(2, 0, -10, 0)
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painter = QPainter(self)
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painter.setPen(ColorScheme.GRAY.as_color())
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painter.drawText(textRect, Qt.AlignRight | Qt.AlignVCenter, self.base_unit())
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def get_amount(self) -> Union[None, Decimal, int]:
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try:
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return (int if self.is_int else Decimal)(str(self.text()))
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except:
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return None
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def setAmount(self, x):
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self.setText("%d"%x)
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class BTCAmountEdit(AmountEdit):
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def __init__(self, decimal_point, is_int=False, parent=None):
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AmountEdit.__init__(self, self._base_unit, is_int, parent)
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self.decimal_point = decimal_point
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def _base_unit(self):
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return decimal_point_to_base_unit_name(self.decimal_point())
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def get_amount(self):
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try:
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x = Decimal(str(self.text()))
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except:
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return None
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# scale it to max allowed precision, make it an int
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power = pow(10, self.max_precision())
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max_prec_amount = int(power * x)
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# if the max precision is simply what unit conversion allows, just return
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if self.max_precision() == self.decimal_point():
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return max_prec_amount
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# otherwise, scale it back to the expected unit
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amount = Decimal(max_prec_amount) / pow(10, self.max_precision()-self.decimal_point())
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return Decimal(amount) if not self.is_int else int(amount)
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def setAmount(self, amount_sat):
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if amount_sat is None:
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self.setText(" ") # Space forces repaint in case units changed
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else:
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self.setText(format_satoshis_plain(amount_sat, decimal_point=self.decimal_point()))
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self.repaint() # macOS hack for #6269
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class FeerateEdit(BTCAmountEdit):
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def __init__(self, decimal_point, is_int=False, parent=None):
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super().__init__(decimal_point, is_int, parent)
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self.extra_precision = FEERATE_PRECISION
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def _base_unit(self):
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return 'sat/byte'
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def get_amount(self):
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sat_per_byte_amount = BTCAmountEdit.get_amount(self)
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return quantize_feerate(sat_per_byte_amount)
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def setAmount(self, amount):
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amount = quantize_feerate(amount)
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super().setAmount(amount)
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