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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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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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