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84 lines
2.4 KiB
84 lines
2.4 KiB
from PyQt4.QtGui import *
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from PyQt4.QtCore import *
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import PyQt4.QtCore as QtCore
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import PyQt4.QtGui as QtGui
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from electrum import bmp, pyqrnative
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class QRCodeWidget(QWidget):
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def __init__(self, data = None):
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QWidget.__init__(self)
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self.addr = None
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self.qr = None
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if data:
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self.set_addr(data)
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self.update_qr()
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def set_addr(self, addr):
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if self.addr != addr:
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if len(addr) < 128:
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MinSize = 210
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else:
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MinSize = 500
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self.setMinimumSize(MinSize, MinSize)
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self.addr = addr
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self.qr = None
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self.update()
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def update_qr(self):
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if self.addr and not self.qr:
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for size in range(len(pyqrnative.QRUtil.PATTERN_POSITION_TABLE)): # [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32]:
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try:
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self.qr = pyqrnative.QRCode(size, pyqrnative.QRErrorCorrectLevel.L)
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self.qr.addData(self.addr)
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self.qr.make()
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break
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except:
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self.qr=None
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continue
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self.update()
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def paintEvent(self, e):
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if not self.addr:
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return
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black = QColor(0, 0, 0, 255)
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white = QColor(255, 255, 255, 255)
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if not self.qr:
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qp = QtGui.QPainter()
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qp.begin(self)
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qp.setBrush(white)
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qp.setPen(white)
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qp.drawRect(0, 0, 198, 198)
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qp.end()
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return
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k = self.qr.getModuleCount()
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qp = QtGui.QPainter()
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qp.begin(self)
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r = qp.viewport()
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boxsize = min(r.width(), r.height())*0.8/k
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size = k*boxsize
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left = (r.width() - size)/2
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top = (r.height() - size)/2
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# Make a white margin around the QR in case of dark theme use:
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margin = 10
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qp.setBrush(white)
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qp.drawRect(left-margin, top-margin, size+(margin*2), size+(margin*2))
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for r in range(k):
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for c in range(k):
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if self.qr.isDark(r, c):
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qp.setBrush(black)
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qp.setPen(black)
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else:
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qp.setBrush(white)
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qp.setPen(white)
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qp.drawRect(left+c*boxsize, top+r*boxsize, boxsize, boxsize)
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qp.end()
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