Fix the background color issue in cookiebrowser

In cookiebrowser example, all new cookie widgets are added at position
0. Background color of the newly added widget is set based on the
color of last inserted cookie widget.

Fixes: QTBUG-120446
Pick-to: 6.5
Change-Id: I76fe3ae83b31489365396a2ebcd31d840b2fa857
Reviewed-by: Michal Klocek <michal.klocek@qt.io>
(cherry picked from commit 285dfce3c0f8e61228784ef557844c66d44feb1f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 9eb97b4b3bfefb9c475e3aa5056a8641aa4b102d)

2 files changed, 16 insertions, 2 deletions

diff --git a/examples/webenginewidgets/cookiebrowser/mainwindow.cpp b/examples/webenginewidgets/cookiebrowser/mainwindow.cpp
index bf65870f8..67454a9f1 100644
--- a/examples/webenginewidgets/cookiebrowser/mainwindow.cpp
+++ b/examples/webenginewidgets/cookiebrowser/mainwindow.cpp
@@ -59,6 +59,7 @@ CookieWidget::CookieWidget(const QNetworkCookie &cookie, QWidget *parent): QWidg
 
 void CookieWidget::setHighlighted(bool enabled)
 {
+    m_isHighlighted = enabled;
     QPalette p = palette();
     p.setColor(backgroundRole(), enabled ? p.alternateBase().color() : p.base().color());
     setPalette(p);
@@ -112,9 +113,18 @@ void MainWindow::handleCookieAdded(const QNetworkCookie &cookie)
         return;
 
     CookieWidget *widget = new CookieWidget(cookie);
-    widget->setHighlighted(m_cookies.count() % 2);
     m_cookies.append(cookie);
-    m_layout->insertWidget(0,widget);
+    // Check whether the first widget in the layout is highlighted.
+    // if it is highlighted, then do not highlight the new item.
+    CookieWidget *firstWidget = m_layout->count()
+            ? qobject_cast<CookieWidget *>(m_layout->itemAt(0)->widget())
+            : nullptr;
+    if (firstWidget) {
+        widget->setHighlighted(!firstWidget->isHighlighted());
+    } else {
+        widget->setHighlighted(false);
+    }
+    m_layout->insertWidget(0, widget);
 
     connect(widget, &CookieWidget::deleteClicked, [this, cookie, widget]() {
         m_store->deleteCookie(cookie);
diff --git a/examples/webenginewidgets/cookiebrowser/mainwindow.h b/examples/webenginewidgets/cookiebrowser/mainwindow.h
index 76fd7de3e..da0d438ca 100644
--- a/examples/webenginewidgets/cookiebrowser/mainwindow.h
+++ b/examples/webenginewidgets/cookiebrowser/mainwindow.h
@@ -29,9 +29,13 @@ class CookieWidget : public QWidget,  public Ui_CookieWidget
 public:
     CookieWidget(const QNetworkCookie &cookie, QWidget *parent = nullptr);
     void setHighlighted(bool enabled);
+    bool isHighlighted() { return m_isHighlighted; }
 signals:
     void deleteClicked();
     void viewClicked();
+
+private:
+    bool m_isHighlighted = false;
 };
 
 class MainWindow : public QMainWindow, public Ui_MainWindow