From 577499bb5e37df92774a14bafbbe749525dd1f45 Mon Sep 17 00:00:00 2001
From: Liang Qi <liang.qi@qt.io>
Date: Wed, 26 Apr 2023 12:43:53 +0200
Subject: [PATCH] WIP: debug for QTBUG-108522

Change-Id: I9909f33f6c2d1f07709af43bd2b94cadc1e85e9a
---
 .../widgets/tools/completer/mainwindow.cpp     | 18 ++++++++++++++++++
 examples/widgets/tools/completer/mainwindow.h  |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/examples/widgets/tools/completer/mainwindow.cpp b/examples/widgets/tools/completer/mainwindow.cpp
index 3b70d76ef0..edce4d03ed 100644
--- a/examples/widgets/tools/completer/mainwindow.cpp
+++ b/examples/widgets/tools/completer/mainwindow.cpp
@@ -70,6 +70,11 @@ MainWindow::MainWindow(QWidget *parent)
     contentsLabel = new QLabel;
     contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 
+    connect(qApp, &QApplication::focusChanged, this,
+            &MainWindow::focusChanged);
+    connect(qApp, &QGuiApplication::focusObjectChanged, this,
+            &MainWindow::focusObjectChanged);
+
     connect(modelCombo, &QComboBox::activated,
             this, &MainWindow::changeModel);
     connect(modeCombo, &QComboBox::activated,
@@ -184,6 +189,19 @@ void MainWindow::changeMode(int index)
 }
 //! [10]
 
+void MainWindow::focusChanged(QWidget *old, QWidget *now)
+{
+    qDebug() << "Debug: " << Q_FUNC_INFO << "old=" << old << "now=" << now;
+}
+
+void MainWindow::focusObjectChanged(QObject *focusObject)
+{
+    qDebug() << "Debug: " << Q_FUNC_INFO << "focusObject=" << focusObject;
+    QWidget *focusWidget = qobject_cast<QWidget *>(focusObject);
+    if (focusWidget)
+        qDebug() << "Debug: focusWidget=" << focusWidget << ", focusProxy=" << focusWidget->focusProxy();
+}
+
 void MainWindow::changeCase(int cs)
 {
     completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
diff --git a/examples/widgets/tools/completer/mainwindow.h b/examples/widgets/tools/completer/mainwindow.h
index 5cfa490b9f..0cf7acc044 100644
--- a/examples/widgets/tools/completer/mainwindow.h
+++ b/examples/widgets/tools/completer/mainwindow.h
@@ -30,6 +30,9 @@ private slots:
     void changeMode(int);
     void changeModel();
     void changeMaxVisible(int);
+
+    void focusChanged(QWidget *old, QWidget *now);
+    void focusObjectChanged(QObject *focusObject);
 //! [0]
 
 //! [1]
-- 
2.34.1