1 files changed, 139 insertions, 0 deletions
diff --git a/src/quickcontrols/imagine/qquickimaginestyle.cpp b/src/quickcontrols/imagine/qquickimaginestyle.cpp
new file mode 100644
index 0000000000..bdd8b00a40
--- /dev/null
+++ b/src/quickcontrols/imagine/qquickimaginestyle.cpp
@@ -0,0 +1,139 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qquickimaginestyle_p.h"
+
+#if QT_CONFIG(settings)
+#include <QtCore/qsettings.h>
+#endif
+#include <QtQuickControls2/private/qquickstyle_p.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_GLOBAL_STATIC_WITH_ARGS(QString, GlobalPath, (QLatin1String("qrc:/qt-project.org/imports/QtQuick/Controls/Imagine/images/")))
+
+static QString ensureSlash(const QString &path)
+{
+    const QChar slash = QLatin1Char('/');
+    return path.endsWith(slash) ? path : path + slash;
+}
+
+QQuickImagineStyle::QQuickImagineStyle(QObject *parent)
+    : QQuickAttachedPropertyPropagator(parent),
+      m_path(*GlobalPath())
+{
+    init();
+}
+
+QQuickImagineStyle *QQuickImagineStyle::qmlAttachedProperties(QObject *object)
+{
+    return new QQuickImagineStyle(object);
+}
+
+QString QQuickImagineStyle::path() const
+{
+    return m_path;
+}
+
+void QQuickImagineStyle::setPath(const QString &path)
+{
+    m_explicitPath = true;
+    if (m_path == path)
+        return;
+
+    m_path = path;
+    propagatePath();
+
+    emit pathChanged();
+}
+
+void QQuickImagineStyle::inheritPath(const QString &path)
+{
+    if (m_explicitPath || m_path == path)
+        return;
+
+    m_path = path;
+    propagatePath();
+    emit pathChanged();
+}
+
+void QQuickImagineStyle::propagatePath()
+{
+    const auto styles = attachedChildren();
+    for (QQuickAttachedPropertyPropagator *child : styles) {
+        QQuickImagineStyle *imagine = qobject_cast<QQuickImagineStyle *>(child);
+        if (imagine)
+            imagine->inheritPath(m_path);
+    }
+}
+
+void QQuickImagineStyle::resetPath()
+{
+    if (!m_explicitPath)
+        return;
+
+    m_explicitPath = false;
+    QQuickImagineStyle *imagine = qobject_cast<QQuickImagineStyle *>(attachedParent());
+    inheritPath(imagine ? imagine->path() : *GlobalPath());
+}
+
+QUrl QQuickImagineStyle::url() const
+{
+    // Using ApplicationWindow as an example, its NinePatchImage url
+    // was previously assigned like this:
+    //
+    // soruce: Imagine.path + "applicationwindow-background"
+    //
+    // If Imagine.path is set to ":/images" by the user, then the final URL would be:
+    //
+    // QUrl("file:///home/user/qt/qtbase/qml/QtQuick/Controls/Imagine/:/images/applicationwindow-background")
+    //
+    // To ensure that the correct URL is constructed, we do it ourselves here,
+    // and then the control QML files use the "url" property instead.
+    const QString path = ensureSlash(m_path);
+    if (path.startsWith(QLatin1String("qrc")))
+        return QUrl(path);
+
+    if (path.startsWith(QLatin1String(":/")))
+        return QUrl(QLatin1String("qrc") + path);
+
+    return QUrl::fromLocalFile(path);
+}
+
+void QQuickImagineStyle::attachedParentChange(QQuickAttachedPropertyPropagator *newParent, QQuickAttachedPropertyPropagator *oldParent)
+{
+    Q_UNUSED(oldParent);
+    QQuickImagineStyle *imagine = qobject_cast<QQuickImagineStyle *>(newParent);
+    if (imagine)
+        inheritPath(imagine->path());
+}
+
+static QByteArray resolveSetting(const QByteArray &env, const QSharedPointer<QSettings> &settings, const QString &name)
+{
+    QByteArray value = qgetenv(env);
+#if QT_CONFIG(settings)
+    if (value.isNull() && !settings.isNull())
+        value = settings->value(name).toByteArray();
+#endif
+    return value;
+}
+
+void QQuickImagineStyle::init()
+{
+    static bool globalsInitialized = false;
+    if (!globalsInitialized) {
+        QSharedPointer<QSettings> settings = QQuickStylePrivate::settings(QStringLiteral("Imagine"));
+
+        QString path = QString::fromUtf8(resolveSetting("QT_QUICK_CONTROLS_IMAGINE_PATH", settings, QStringLiteral("Path")));
+        if (!path.isEmpty())
+            *GlobalPath() = m_path = ensureSlash(path);
+
+        globalsInitialized = true;
+    }
+
+    QQuickAttachedPropertyPropagator::initialize(); // TODO: lazy init?
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickimaginestyle_p.cpp"