new widget: QRTextEdit

gui/qt/qrtextedit.py

@@ -0,0 +1,43 @@
+from electrum.i18n import _
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+
+class QRTextEdit(QTextEdit):
+
+    def __init__(self):
+        QTextEdit.__init__(self)
+        self.button = QToolButton(self)
+        self.button.setIcon(QIcon(":icons/qrcode.png"))
+        self.button.setStyleSheet("QToolButton { border: none; padding: 0px; }")
+        self.button.setVisible(True)
+        self.button.clicked.connect(lambda: self.qr_show() if self.isReadOnly() else self.qr_input())
+        #frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
+        #self.setStyleSheet(QString("QLineEdit { padding-right: %1px; } ").arg(self.button.sizeHint().width() + frameWidth + 1))
+        #msz = self.minimumSizeHint()
+        #self.setMinimumSize(max(msz.width(), self.button.sizeHint().height() + frameWidth * 2 + 2),
+        #                    max(msz.height(), self.button.sizeHint().height() + frameWidth * 2 + 2))
+
+    def resizeEvent(self, e):
+        o = QTextEdit.resizeEvent(self, e)
+        sz = self.button.sizeHint()
+        frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
+        self.button.move(self.rect().right() - frameWidth - sz.width(),
+                         (self.rect().bottom() - frameWidth - sz.height()))
+        return o
+
+    def contextMenuEvent(self, e):
+        m = self.createStandardContextMenu()
+        if self.isReadOnly():
+            m.addAction(_("Show as QR code"), self.qr_show)
+        else:
+            m.addAction(_("Read QR code"), self.qr_input)
+        m.exec_(e.globalPos())
+
+    def qr_show(self):
+        from qrcodewidget import QRDialog
+        QRDialog(str(self.toPlainText())).exec_()
+
+    def qr_input(self):
+        from electrum.plugins import run_hook
+        run_hook('scan_qr_hook', self.setText)
+