iOS: add native file dialog for selecing photos/assets

This will add a file dialog backend on iOS. The implementation
will check if a dialogs initial directory points to the system
picture location, and if so, present a UIImagePickerController.
Otherwise it will return false upon show, which causes
QFileDialog to use the widget based version as fallback.

Change-Id: I276b630911652b6d28f60763decc7ec38f00c817
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/src/plugins/platforms/ios/qiosfiledialog.h b/src/plugins/platforms/ios/qiosfiledialog.h
new file mode 100644
index 0000000000..7442e21422
--- /dev/null
+++ b/src/plugins/platforms/ios/qiosfiledialog.h
@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QIOSFILEDIALOG_H
+#define QIOSFILEDIALOG_H
+
+#include <QtCore/qeventloop.h>
+#include <qpa/qplatformdialoghelper.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_FORWARD_DECLARE_OBJC_CLASS(UIViewController);
+
+class QIOSFileDialog : public QPlatformFileDialogHelper
+{
+public:
+    QIOSFileDialog();
+    ~QIOSFileDialog();
+
+    void exec() Q_DECL_OVERRIDE;
+    bool defaultNameFilterDisables() const Q_DECL_OVERRIDE { return false; }
+    bool show(Qt::WindowFlags windowFlags, Qt::WindowModality windowModality, QWindow *parent) Q_DECL_OVERRIDE;
+    void hide() Q_DECL_OVERRIDE;
+    void setDirectory(const QUrl &) Q_DECL_OVERRIDE {}
+    QUrl directory() const Q_DECL_OVERRIDE { return QUrl(); }
+    void selectFile(const QUrl &) Q_DECL_OVERRIDE {}
+    QList<QUrl> selectedFiles() const Q_DECL_OVERRIDE;
+    void setFilter() Q_DECL_OVERRIDE {}
+    void selectNameFilter(const QString &) Q_DECL_OVERRIDE {}
+    QString selectedNameFilter() const Q_DECL_OVERRIDE { return QString(); }
+
+    void selectedFilesChanged(QList<QUrl> selection);
+
+private:
+    QUrl m_directory;
+    QList<QUrl> m_selection;
+    QEventLoop m_eventLoop;
+    UIViewController *m_viewController;
+};
+
+QT_END_NAMESPACE
+
+#endif // QIOSFILEDIALOG_H
+