diff options
Diffstat (limited to 'src/imports/controls/shared/qquickstyle_p.h')
| -rw-r--r-- | src/imports/controls/shared/qquickstyle_p.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/imports/controls/shared/qquickstyle_p.h b/src/imports/controls/shared/qquickstyle_p.h new file mode 100644 index 00000000..0fd4f612 --- /dev/null +++ b/src/imports/controls/shared/qquickstyle_p.h @@ -0,0 +1,157 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Labs Controls module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL3$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPLv3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or later as published by the Free +** Software Foundation and appearing in the file LICENSE.GPL included in +** the packaging of this file. Please review the following information to +** ensure the GNU General Public License version 2.0 requirements will be +** met: http://www.gnu.org/licenses/gpl-2.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QQUICKSTYLE_P_H +#define QQUICKSTYLE_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtQml/qqml.h> +#include <QtQml/qqmlengine.h> +#include <QtQuick/qquickitem.h> +#include <QtQuick/qquickwindow.h> + +QT_BEGIN_NAMESPACE + +namespace QQuickStyle +{ + template <typename T> + static T *instance(QObject *object) + { + if (object) + return qobject_cast<T*>(qmlAttachedPropertiesObject<T>(object, false)); + return Q_NULLPTR; + } + + template <typename T> + static T *findParent(QObject *object) + { + QQuickItem *item = qobject_cast<QQuickItem *>(object); + if (item) { + // lookup parent items + QQuickItem *parent = item->parentItem(); + while (parent) { + T *attached = instance<T>(parent); + if (attached) + return attached; + parent = parent->parentItem(); + } + + // fallback to item's window + QQuickWindow *window = item->window(); + if (window) { + T *attached = instance<T>(window); + if (attached) + return attached; + } + } + + // lookup parent window + QQuickWindow *window = qobject_cast<QQuickWindow *>(object); + if (window) { + QQuickWindow *parentWindow = qobject_cast<QQuickWindow *>(window->parent()); + if (parentWindow) { + T *attached = instance<T>(window); + if (attached) + return attached; + } + } + + // fallback to engine (global) + if (object) { + QQmlEngine *engine = qmlEngine(object); + if (engine) { + QByteArray name = QByteArray("_q_") + T::staticMetaObject.className(); + T *instance = engine->property(name).value<T*>(); + if (!instance) { + instance = new T(engine); + engine->setProperty(name, QVariant::fromValue(instance)); + } + return instance; + } + } + + return Q_NULLPTR; + } + + template <typename T> + static QList<T *> findChildren(QObject *object) + { + QList<T *> children; + + QQuickItem *item = qobject_cast<QQuickItem *>(object); + if (!item) { + QQuickWindow *window = qobject_cast<QQuickWindow *>(object); + if (window) { + item = window->contentItem(); + + foreach (QObject *child, window->children()) { + QQuickWindow *childWindow = qobject_cast<QQuickWindow *>(child); + if (childWindow) { + T *attached = instance<T>(childWindow); + if (attached) + children += attached; + } + } + } + } + + if (item) { + foreach (QQuickItem *child, item->childItems()) { + T *attached = instance<T>(child); + if (attached) + children += attached; + else + children += findChildren<T>(child); + } + } + + return children; + } +} + +QT_END_NAMESPACE + +#endif // QQUICKSTYLE_P_H |