Add QR code support to the GUI

docs/INSTALL.md

@@ -89,6 +89,7 @@ command line scripts as explained in the [scripts README](https://github.com/Ada
 6) Setup joinmarket-qt
     ```
     pip install PySide2
+    pip install qrcode[pil]
     pip install https://github.com/sunu/qt5reactor/archive/58410aaead2185e9917ae9cac9c50fe7b70e4a60.zip
     python setupall.py --all
     ```

install.sh

@@ -427,6 +427,7 @@ qt_deps_install ()
 {
     pip install \
         PySide2 \
+        qrcode[pil] \
         https://github.com/sunu/qt5reactor/archive/58410aaead2185e9917ae9cac9c50fe7b70e4a60.zip
 
     return "$?"

scripts/joinmarket-qt.py

@@ -25,7 +25,7 @@ Some widgets copied and modified from https://github.com/spesmilo/electrum
 
 import sys, datetime, os, logging
 import platform, json, threading, time
-
+import qrcode
 
 from decimal import Decimal
 from PySide2 import QtCore
@@ -34,6 +34,8 @@ from PySide2.QtGui import *
 
 from PySide2.QtWidgets import *
 
+from PIL.ImageQt import ImageQt
+
 if platform.system() == 'Windows':
     MONOSPACE_FONT = 'Lucida Console'
 elif platform.system() == 'Darwin':
@@ -1101,6 +1103,24 @@ class CoinsTab(QWidget):
                        lambda: app.clipboard().setText(txid))
         menu.exec_(self.cTW.viewport().mapToGlobal(position))
 
+class BitcoinQRCodePopup(QDialog):
+
+    def __init__(self, parent, address):
+        super(BitcoinQRCodePopup, self).__init__(parent)
+        self.address = address
+        self.setWindowTitle(address)
+        img = qrcode.make('bitcoin:' + address)
+        self.imageLabel = QLabel()
+        self.imageLabel.setPixmap(QPixmap.fromImage(ImageQt(img)))
+        layout = QVBoxLayout()
+        layout.addWidget(self.imageLabel)
+        self.setLayout(layout)
+        self.initUI()
+
+    def initUI(self):
+        self.show()
+
+
 class JMWalletTab(QWidget):
 
     def __init__(self):
@@ -1152,6 +1172,8 @@ class JMWalletTab(QWidget):
         if address_valid:
             menu.addAction("Copy address to clipboard",
                            lambda: app.clipboard().setText(txt))
+            menu.addAction("Show QR code",
+                           lambda: self.openQRCodePopup(txt))
         if xpub_exists:
             menu.addAction("Copy extended pubkey to clipboard",
                            lambda: app.clipboard().setText(xpub))
@@ -1160,6 +1182,10 @@ class JMWalletTab(QWidget):
         #TODO add more items to context menu
         menu.exec_(self.walletTree.viewport().mapToGlobal(position))
 
+    def openQRCodePopup(self, address):
+        popup = BitcoinQRCodePopup(self, address)
+        popup.show()
+
     def updateWalletInfo(self, walletinfo=None):
         l = self.walletTree
         l.clear()