add paste button to qt payto_e. fixes #6878

electrum/gui/qt/main_window.py

@@ -1310,6 +1310,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         from .paytoedit import PayToEdit
         self.amount_e = BTCAmountEdit(self.get_decimal_point)
         self.payto_e = PayToEdit(self)
+        self.payto_e.addPasteButton(self.app)
         msg = _('Recipient of the funds.') + '\n\n'\
               + _('You may enter a Bitcoin address, a label from your list of contacts (a list of completions will be proposed), or an alias (email-like address that forwards to a Bitcoin address)')
         payto_label = HelpLabel(_('Pay to'), msg)

electrum/gui/qt/util.py

@@ -790,6 +790,14 @@ class ButtonsWidget(QWidget):
         self.app.clipboard().setText(self.text())
         QToolTip.showText(QCursor.pos(), _("Text copied to clipboard"), self)
 
+    def addPasteButton(self, app):
+        self.app = app
+        self.addButton("copy.png", self.on_paste, _("Paste from clipboard"))
+
+    def on_paste(self):
+        self.setText(self.app.clipboard().text())
+
+
 class ButtonsLineEdit(QLineEdit, ButtonsWidget):
     def __init__(self, text=None):
         QLineEdit.__init__(self, text)