ColorDialog & FontDialog: use widgets as a fallback

This makes these dialogs available on Windows and KDE. One more reason
to keep the module experimental. In the long run, platforms should
implement QPA dialogs so that we can remove the undesired dependency.

Also simple instance creation tests are included to make sure it
won't crash with non-QApplication apps.

Change-Id: Ib4dabe7b656a1aa1f114052a3f57c9b1232ff27f
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 78 insertions, 0 deletions

diff --git a/src/imports/platform/widgets/qwidgetplatformfontdialog_p.h b/src/imports/platform/widgets/qwidgetplatformfontdialog_p.h
new file mode 100644
index 00000000..97d5463d
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatformfontdialog_p.h
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform 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 QWIDGETPLATFORMFONTDIALOG_P_H
+#define QWIDGETPLATFORMFONTDIALOG_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 <QtGui/qpa/qplatformdialoghelper.h>
+
+QT_BEGIN_NAMESPACE
+
+class QFontDialog;
+
+class QWidgetPlatformFontDialog : public QPlatformFontDialogHelper
+{
+    Q_OBJECT
+
+public:
+    explicit QWidgetPlatformFontDialog(QObject *parent = nullptr);
+    ~QWidgetPlatformFontDialog();
+
+    QFont currentFont() const override;
+    void setCurrentFont(const QFont &font) override;
+
+    void exec() override;
+    bool show(Qt::WindowFlags windowFlags, Qt::WindowModality windowModality, QWindow *parent) override;
+    void hide() override;
+
+private:
+    QScopedPointer<QFontDialog> m_dialog;
+};
+
+QT_END_NAMESPACE
+
+#endif // QWIDGETPLATFORMFONTDIALOG_P_H