Don't pass Python Future objects to QML

Returning a Future doesn't work on Windows for some reason
(https://github.com/thp/pyotherside/issues/116).

Instead of using these objects from QML to cancel running coroutines,
call a Python QMLBridge function that takes a coroutine UUID and will
take care of the cancelling.

src/gui/Pages/Chat/RoomPane/MemberView/MemberDelegate.qml

@@ -7,13 +7,12 @@ import "../../../.."
 import "../../../../Base"
 import "../../../../Base/HTile"
 import "../../../../Popups"
-import "../../../../PythonBridge"
 
 HTile {
     id: member
 
     property bool colorName: hovered
-    property Future getPresenceFuture: null
+    property string getPresenceFutureId: ""
 
     backgroundColor: theme.chat.roomPane.listView.member.background
     contentOpacity:
@@ -155,11 +154,15 @@ HTile {
 
     Component.onCompleted:
         if (model.presence === "offline" && model.last_active_at < new Date(1))
-            getPresenceFuture = py.callClientCoro(
-                chat.userId, "get_offline_presence", [model.id],
+            getPresenceFutureId = py.callClientCoro(
+                chat.userId,
+                "get_offline_presence",
+                [model.id],
+                () => { getPresenceFutureId = "" }
             )
 
-    Component.onDestruction: if (getPresenceFuture) getPresenceFuture.cancel()
+    Component.onDestruction:
+        if (getPresenceFutureId) py.cancelCoro(getPresenceFutureId)
 
     Behavior on contentOpacity { HNumberAnimation {} }
     Behavior on spacing { HNumberAnimation {} }

src/gui/Pages/Chat/RoomPane/MemberView/MemberProfile.qml

@@ -6,7 +6,6 @@ import QtQuick.Layouts 1.12
 import "../../../.."
 import "../../../../Base"
 import "../../../../Base/Buttons"
-import "../../../../PythonBridge"
 
 HListView {
     id: root
@@ -21,8 +20,8 @@ HListView {
 
     property bool powerLevelFieldFocused: false
 
-    property Future setPowerFuture: null
-    property Future getPresenceFuture: null
+    property string setPowerFutureId: ""
+    property string getPresenceFutureId: ""
 
     function loadDevices() {
          py.callClientCoro(userId, "member_devices", [member.id], devices => {
@@ -246,14 +245,14 @@ HListView {
             ApplyButton {
                 id: applyButton
                 enabled: ! powerLevel.item.fieldOverMaximum
-                loading: setPowerFuture !== null
+                loading: setPowerFutureId !== ""
                 text: ""
                 onClicked: {
-                    setPowerFuture = py.callClientCoro(
+                    setPowerFutureId = py.callClientCoro(
                         userId,
                         "room_set_member_power",
                         [roomId, member.id, powerLevel.item.level],
-                        () => { setPowerFuture = null }
+                        () => { setPowerFutureId = "" }
                     )
                 }
 
@@ -264,8 +263,8 @@ HListView {
             CancelButton {
                 text: ""
                 onClicked: {
-                    setPowerFuture.cancel()
-                    setPowerFuture = null
+                    py.cancelCoro(setPowerFutureId)
+                    setPowerFutureId = ""
                     powerLevel.item.reset()
                 }
 
@@ -289,14 +288,18 @@ HListView {
         if (member.presence === "offline" &&
             member.last_active_at < new Date(1))
         {
-            getPresenceFuture =
-                py.callClientCoro(userId, "get_offline_presence", [member.id])
+            getPresenceFutureId = py.callClientCoro(
+                userId,
+                "get_offline_presence",
+                [member.id],
+                () => { getPresenceFutureId = "" }
+            )
         }
     }
 
     Component.onDestruction: {
-        if (setPowerFuture) setPowerFuture.cancel()
-        if (getPresenceFuture) getPresenceFuture.cancel()
+        if (setPowerFutureId) py.cancelCoro(setPowerFutureId)
+        if (getPresenceFutureId) py.cancelCoro(getPresenceFutureId)
     }
 
     Keys.onEnterPressed: Keys.onReturnPressed(event)

src/gui/Pages/Chat/RoomPane/SettingsView.qml

@@ -10,7 +10,7 @@ import "../../../Base/Buttons"
 HFlickableColumnPage {
     id: settingsView
 
-    property var saveFuture: null
+    property string saveFutureId: ""
 
     readonly property bool anyChange:
         nameField.item.changed || topicArea.item.area.changed ||
@@ -20,7 +20,7 @@ HFlickableColumnPage {
     readonly property Item keybindFocusItem: nameField.item
 
     function save() {
-        if (saveFuture) saveFuture.cancel()
+        if (saveFutureId) py.cancelCoro(saveFutureId)
 
         const args = [
             chat.roomId,
@@ -35,17 +35,17 @@ HFlickableColumnPage {
             forbidGuestsCheckBox.checked : undefined,
         ]
 
-        function onDone() { saveFuture = null }
+        function onDone() { saveFutureId = "" }
 
-        saveFuture = py.callClientCoro(
+        saveFutureId = py.callClientCoro(
             chat.userId, "room_set", args, onDone, onDone,
         )
     }
 
     function cancel() {
-        if (saveFuture) {
-            saveFuture.cancel()
-            saveFuture = null
+        if (saveFutureId) {
+            py.cancelCoro(saveFutureId)
+            saveFutureId = ""
         }
 
         nameField.item.reset()
@@ -66,14 +66,14 @@ HFlickableColumnPage {
         ApplyButton {
             id: applyButton
             enabled: anyChange
-            loading: saveFuture !== null
+            loading: saveFutureId !== ""
             disableWhileLoading: false
             onClicked: save()
 
         }
 
         CancelButton {
-            enabled: anyChange || saveFuture !== null
+            enabled: anyChange || saveFutureId !== ""
             onClicked: cancel()
         }
     }