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-/****************************************************************************
- **
- ** Copyright (C) 2016 Ivan Vizir <define-true-false@yandex.com>
- ** Copyright (C) 2016 The Qt Company Ltd.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtWinExtras module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** 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 https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
-
-#ifndef QQUICKICONLOADER_P_H
-#define QQUICKICONLOADER_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/qtqml-config.h>
-#include <QtGui/QIcon>
-#include <QtGui/QPixmap>
-#include <QtCore/QDebug>
-#include <QtCore/QObject>
-#include <QtCore/QVariant>
-#include <QtCore/QUrl>
-
-QT_BEGIN_NAMESPACE
-
-class QIcon;
-class QQmlEngine;
-class QNetworkReply;
-
-class QQuickIconLoader
-{
-public:
- enum LoadResult {
- LoadOk,
- LoadError,
- LoadNetworkRequestStarted,
- };
-
- // Load a QIcon (pass type = QMetaType::QIcon) or a QPixmap (pass type =
- // QMetaType::QPixmap) from url. The function takes an object and member
- // function pointer to a slot accepting a QVariant. For resources that can
- // loaded synchronously ("file", "qrc" or "image"), the member function pointer
- // will be invoked immediately with the result. For network resources, it will be
- // connected to an object handling the network reply and invoked once it finishes.
- template <typename Object>
- static LoadResult load(const QUrl &url, const QQmlEngine *engine,
- int metaTypeId, const QSize &requestedSize,
- Object *receiver, void (Object::*function)(const QVariant &));
-
-private:
- QQuickIconLoader() = default;
- static QVariant loadFromFile(const QUrl &url, int metaTypeId);
- static QVariant loadFromImageProvider(const QUrl &url, const QQmlEngine *engine,
- int metaTypeId, QSize requestedSize);
-#if QT_CONFIG(qml_network)
- static QNetworkReply *loadFromNetwork(const QUrl &url, const QQmlEngine *engine);
-#endif
-};
-
-#if QT_CONFIG(qml_network)
-// Internal handler which loads the resource once QNetworkReply finishes
-class QQuickIconLoaderNetworkReplyHandler : public QObject
-{
- Q_OBJECT
-
-public:
- explicit QQuickIconLoaderNetworkReplyHandler(QNetworkReply *reply, int);
-
-Q_SIGNALS:
- void finished(const QVariant &);
-
-private Q_SLOTS:
- void onRequestFinished();
-
-private:
- const int m_metaTypeId;
-};
-#endif // qml_network
-
-template <typename Object>
-QQuickIconLoader::LoadResult
- QQuickIconLoader::load(const QUrl &url, const QQmlEngine *engine,
- int metaTypeId, const QSize &requestedSize,
- Object *receiver, void (Object::*function)(const QVariant &))
-{
- const QString scheme = url.scheme();
- if (scheme.startsWith(u"http")) {
-#if QT_CONFIG(qml_network)
- if (QNetworkReply *reply = QQuickIconLoader::loadFromNetwork(url, engine)) {
- auto *handler = new QQuickIconLoaderNetworkReplyHandler(reply, metaTypeId);
- QObject::connect(handler, &QQuickIconLoaderNetworkReplyHandler::finished, receiver, function);
- return LoadNetworkRequestStarted;
- }
-#endif // qml_network
- return LoadError;
- }
- const QVariant resource = scheme == u"image"
- ? QQuickIconLoader::loadFromImageProvider(url, engine, metaTypeId, requestedSize)
- : QQuickIconLoader::loadFromFile(url, metaTypeId); // qrc, file
- if (resource.isValid()) {
- (receiver->*function)(resource);
- return LoadOk;
- }
- return LoadError;
-}
-
-QT_END_NAMESPACE
-
-#endif // QQUICKICONLOADER_P_H