Let QT_QUICK_CONTROLS_CONF override :/qtquickcontrols2.conf

This is an undocumented feature mainly for tooling purposes. This way
tooling can make sure that qmlpuppet uses the same configuration as the
application when displaying a form in the Qt Quick Designer.

Change-Id: If46055f09049118f1f49c350c74d5aab501a0378
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@theqtcompany.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/src/quickcontrols2/qquickstyleattached.cpp b/src/quickcontrols2/qquickstyleattached.cpp
index d0df79c5..cdfa902e 100644
--- a/src/quickcontrols2/qquickstyleattached.cpp
+++ b/src/quickcontrols2/qquickstyleattached.cpp
@@ -146,6 +146,18 @@ static QList<QQuickStyleAttached *> findChildStyles(const QMetaObject *type, QOb
     return children;
 }
 
+static QString resolveConfigFile()
+{
+    QString filePath = QFile::decodeName(qgetenv("QT_QUICK_CONTROLS_CONF"));
+    if (!QFile::exists(filePath)) {
+        if (!filePath.isEmpty())
+            qWarning("QT_QUICK_CONTROLS_CONF=%s: No such file", qPrintable(filePath));
+
+        filePath = QStringLiteral(":/qtquickcontrols2.conf");
+    }
+    return filePath;
+}
+
 QQuickStyleAttached::QQuickStyleAttached(QObject *parent) : QObject(parent)
 {
     QQuickItem *item = qobject_cast<QQuickItem *>(parent);
@@ -175,7 +187,7 @@ QQuickStyleAttached::~QQuickStyleAttached()
 QSharedPointer<QSettings> QQuickStyleAttached::settings(const QString &group)
 {
 #ifndef QT_NO_SETTINGS
-    const QString filePath = QStringLiteral(":/qtquickcontrols2.conf");
+    static const QString filePath = resolveConfigFile();
     if (QFile::exists(filePath)) {
         QFileSelector selector;
         QSettings *settings = new QSettings(selector.select(filePath), QSettings::IniFormat);