add 'spend unconfirmed' config option

electrum/gui/qml/components/Preferences.qml

@@ -41,7 +41,7 @@ Pane {
                     }
                 }
 
-                CheckBox {
+                Switch {
                     id: thousands
                     Layout.columnSpan: 2
                     text: qsTr('Add thousands separators to bitcoin amounts')
@@ -51,14 +51,14 @@ Pane {
                     }
                 }
 
-                CheckBox {
+                Switch {
                     id: checkSoftware
                     Layout.columnSpan: 2
                     text: qsTr('Automatically check for software updates')
                     enabled: false
                 }
 
-                CheckBox {
+                Switch {
                     id: fiatEnable
                     text: qsTr('Fiat Currency')
                     onCheckedChanged: {
@@ -77,12 +77,12 @@ Pane {
                     }
                 }
 
-                CheckBox {
+                Switch {
                     id: historicRates
                     text: qsTr('Historic rates')
                     enabled: Daemon.fx.enabled
                     Layout.columnSpan: 2
-                    onCheckStateChanged: {
+                    onCheckedChanged: {
                         if (activeFocus)
                             Daemon.fx.historicRates = checked
                     }
@@ -106,6 +106,16 @@ Pane {
                     }
                 }
 
+                Switch {
+                    id: spendUnconfirmed
+                    text: qsTr('Spend unconfirmed')
+                    Layout.columnSpan: 2
+                    onCheckedChanged: {
+                        if (activeFocus)
+                            Config.spendUnconfirmed = checked
+                    }
+                }
+
                 Label {
                     text: qsTr('Lightning Routing')
                 }
@@ -133,6 +143,7 @@ Pane {
         historicRates.checked = Daemon.fx.historicRates
         rateSources.currentIndex = rateSources.indexOfValue(Daemon.fx.rateSource)
         fiatEnable.checked = Daemon.fx.enabled
+        spendUnconfirmed.checked = Config.spendUnconfirmed
         lnRoutingType.currentIndex = Config.useGossip ? 0 : 1
     }
 }

electrum/gui/qml/qeconfig.py

@@ -70,6 +70,16 @@ class QEConfig(QObject):
         self.config.amt_add_thousands_sep = checked
         self.thousandsSeparatorChanged.emit()
 
+    spendUnconfirmedChanged = pyqtSignal()
+    @pyqtProperty(bool, notify=spendUnconfirmedChanged)
+    def spendUnconfirmed(self):
+        return not self.config.get('confirmed_only', False)
+
+    @spendUnconfirmed.setter
+    def spendUnconfirmed(self, checked):
+        self.config.set_key('confirmed_only', not checked, True)
+        self.spendUnconfirmedChanged.emit()
+
     useGossipChanged = pyqtSignal()
     @pyqtProperty(bool, notify=useGossipChanged)
     def useGossip(self):