Android: fix missing wheel events

Change-Id: I65b4f6a8fcbdad537a984064e332a4a1f34a265a
Task-number: QTBUG-43669
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/androidjniinput.cpp b/src/plugins/platforms/android/androidjniinput.cpp
index 048be662be..32630003d1 100644
--- a/src/plugins/platforms/android/androidjniinput.cpp
+++ b/src/plugins/platforms/android/androidjniinput.cpp
@@ -173,6 +173,25 @@ namespace QtAndroidInput
                                                  Qt::MouseButtons(Qt::LeftButton));
     }
 
+    static void mouseWheel(JNIEnv */*env*/, jobject /*thiz*/, jint /*winId*/, jint x, jint y, jfloat hdelta, jfloat vdelta)
+    {
+        if (m_ignoreMouseEvents)
+            return;
+
+        QPoint globalPos(x,y);
+        QWindow *tlw = m_mouseGrabber.data();
+        if (!tlw)
+            tlw = topLevelWindowAt(globalPos);
+        QPoint localPos = tlw ? (globalPos-tlw->position()) : globalPos;
+        QPoint angleDelta(hdelta * 120, vdelta * 120);
+
+        QWindowSystemInterface::handleWheelEvent(tlw,
+                                                 localPos,
+                                                 globalPos,
+                                                 QPoint(),
+                                                 angleDelta);
+    }
+
     static void longPress(JNIEnv */*env*/, jobject /*thiz*/, jint /*winId*/, jint x, jint y)
     {
         QAndroidInputContext *inputContext = QAndroidInputContext::androidInputContext();
@@ -824,6 +843,7 @@ namespace QtAndroidInput
         {"mouseDown", "(III)V", (void *)mouseDown},
         {"mouseUp", "(III)V", (void *)mouseUp},
         {"mouseMove", "(III)V", (void *)mouseMove},
+        {"mouseWheel", "(IIIFF)V", (void *)mouseWheel},
         {"longPress", "(III)V", (void *)longPress},
         {"isTabletEventSupported", "()Z", (void *)isTabletEventSupported},
         {"tabletEvent", "(IIJIIIFFF)V", (void *)tabletEvent},