comctl32: Don't ask for WM_MOUSEHOVER messages when LVS_EX_TRACKSELECT was not specified.

dlls/comctl32/listview.c

@@ -4122,6 +4122,7 @@ static LRESULT LISTVIEW_MouseMove(LISTVIEW_INFO *infoPtr, WORD fwKeys, INT x, IN
     /* see if we are supposed to be tracking mouse hovering */
     if (LISTVIEW_IsHotTracking(infoPtr)) {
         TRACKMOUSEEVENT trackinfo;
+        DWORD flags;
 
         trackinfo.cbSize = sizeof(TRACKMOUSEEVENT);
         trackinfo.dwFlags = TME_QUERY;
@@ -4129,8 +4130,12 @@ static LRESULT LISTVIEW_MouseMove(LISTVIEW_INFO *infoPtr, WORD fwKeys, INT x, IN
         /* see if we are already tracking this hwnd */
         _TrackMouseEvent(&trackinfo);
 
-        if(!(trackinfo.dwFlags & TME_HOVER) || trackinfo.hwndTrack != infoPtr->hwndSelf) {
-            trackinfo.dwFlags     = TME_HOVER;
+        flags = TME_LEAVE;
+        if(infoPtr->dwLvExStyle & LVS_EX_TRACKSELECT)
+            flags |= TME_HOVER;
+
+        if((trackinfo.dwFlags & flags) != flags || trackinfo.hwndTrack != infoPtr->hwndSelf) {
+            trackinfo.dwFlags     = flags;
             trackinfo.dwHoverTime = infoPtr->dwHoverTime;
             trackinfo.hwndTrack   = infoPtr->hwndSelf;
 

dlls/comctl32/tests/listview.c

@@ -5745,6 +5745,46 @@ static void test_header_proc(void)
     DestroyWindow(hwnd);
 }
 
+static void test_oneclickactivate(void)
+{
+    char item1[] = "item1";
+    LVITEMA item;
+    HWND hwnd, fg;
+    INT r;
+
+    hwnd = CreateWindowExA(0, "SysListView32", "foo", WS_VISIBLE|WS_CHILD|LVS_LIST,
+            10, 10, 100, 200, hwndparent, NULL, NULL, NULL);
+    ok(hwnd != NULL, "failed to create listview window\n");
+    r = SendMessageA(hwnd, LVM_SETEXTENDEDLISTVIEWSTYLE, 0, LVS_EX_ONECLICKACTIVATE);
+    ok(r == 0, "should return zero\n");
+
+    SetForegroundWindow(hwndparent);
+    fg = GetForegroundWindow();
+    if (fg != hwndparent)
+    {
+        skip("Window is not in the foreground. Skipping oneclickactivate tests.\n");
+        DestroyWindow(hwnd);
+        return;
+    }
+
+    item.mask = LVIF_TEXT;
+    item.iItem = 0;
+    item.iSubItem = 0;
+    item.iImage = 0;
+    item.pszText = item1;
+    r = SendMessageA(hwnd, LVM_INSERTITEMA, 0, (LPARAM) &item);
+    ok(r == 0, "should not fail\n");
+
+    r = SendMessageA(hwnd, LVM_GETSELECTEDCOUNT, 0, 0);
+    expect(0, r);
+    r = SendMessageA(hwnd, WM_MOUSEHOVER, MAKELONG(1, 1), 0);
+    expect(0, r);
+    r = SendMessageA(hwnd, LVM_GETSELECTEDCOUNT, 0, 0);
+    expect(1, r);
+
+    DestroyWindow(hwnd);
+}
+
 START_TEST(listview)
 {
     HMODULE hComctl32;
@@ -5814,6 +5854,7 @@ START_TEST(listview)
     test_deleteitem();
     test_insertitem();
     test_header_proc();
+    test_oneclickactivate();
 
     if (!load_v6_module(&ctx_cookie, &hCtx))
     {