From 47bd603dba7c1d66871646f309407976aafe2f6b Mon Sep 17 00:00:00 2001
From: Andy Shaw <andy.shaw@qt.io>
Date: Tue, 19 Nov 2019 06:21:01 +0100
Subject: Pass the timestamp as a string from JS to Qt to preserve precision

When the timestamp was passed as a double from JS to Qt while being
hosted on an embedded Linux device it was losing the precision
and as a result scrolling for a ListView does not work because it
does not see the timestamp has having changed. So by passing it as a
string instead means that it does not lose anything in the transition.

Fixes: QTBUG-79842
Change-Id: Ia6bb8b713c0c5296a046ff3f7fddbc8e8249bbd6
Reviewed-by: Jesus Fernandez <jsfdez@gmail.com>
---
 src/plugins/platforms/webgl/qwebglintegration.cpp | 10 +++++-----
 src/plugins/platforms/webgl/webqt.jsx             |  4 ++--
 2 files changed, 7 insertions(+), 7 deletions(-)

(limited to 'src')

diff --git a/src/plugins/platforms/webgl/qwebglintegration.cpp b/src/plugins/platforms/webgl/qwebglintegration.cpp
index 645c766..5031e5e 100644
--- a/src/plugins/platforms/webgl/qwebglintegration.cpp
+++ b/src/plugins/platforms/webgl/qwebglintegration.cpp
@@ -493,10 +493,10 @@ void QWebGLIntegrationPrivate::handleMouse(const ClientData &clientData, const Q
     QPointF globalPos(object.value("clientX").toDouble(),
                       object.value("clientY").toDouble());
     auto buttons = static_cast<Qt::MouseButtons>(object.value("buttons").toInt());
-    auto time = object.value("time").toDouble();
+    auto time = object.value("time").toString();
     auto platformWindow = findWindow(clientData, winId);
     QWindowSystemInterface::handleMouseEvent(platformWindow->window(),
-                                             static_cast<ulong>(time),
+                                             time.toULong(),
                                              localPos,
                                              globalPos,
                                              Qt::MouseButtons(buttons),
@@ -535,11 +535,11 @@ void QWebGLIntegrationPrivate::handleTouch(const ClientData &clientData, const Q
     const auto winId = object.value("name").toInt(-1);
     Q_ASSERT(winId != -1);
     auto window = findWindow(clientData, winId)->window();
-    const auto time = object.value("time").toDouble();
+    const auto time = object.value("time").toString();
     const auto eventType = object.value("event").toString();
     if (eventType == QStringLiteral("touchcancel")) {
         QWindowSystemInterface::handleTouchCancelEvent(window,
-                                                       time,
+                                                       time.toULong(),
                                                        touchDevice,
                                                        Qt::NoModifier);
     } else {
@@ -585,7 +585,7 @@ void QWebGLIntegrationPrivate::handleTouch(const ClientData &clientData, const Q
         }
 
         QWindowSystemInterface::handleTouchEvent(window,
-                                                 time,
+                                                 time.toULong(),
                                                  touchDevice,
                                                  points,
                                                  Qt::NoModifier);
diff --git a/src/plugins/platforms/webgl/webqt.jsx b/src/plugins/platforms/webgl/webqt.jsx
index ca2b3b5..02f93a5 100644
--- a/src/plugins/platforms/webgl/webqt.jsx
+++ b/src/plugins/platforms/webgl/webqt.jsx
@@ -212,7 +212,7 @@ window.onload = function () {
             var object = { "type": "mouse",
                 "buttons": buttons,
                 "layerX": layerX, "layerY": layerY, "clientX": clientX, "clientY": clientY,
-                "time": new Date().getTime(),
+                "time": new Date().getTime().toString(),
                 "name": name
             };
             sendObject(object);
@@ -285,7 +285,7 @@ window.onload = function () {
             var object = {
                 "type": "touch",
                 "name": name,
-                "time": new Date().getTime(),
+                "time": new Date().getTime().toString(),
                 "event": event.type,
                 "changedTouches": [],
                 "stationaryTouches": [],
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