New method for show Android splashscreen

New method use theme for show splashscreen
in the first phase (from when an app is
launched to when Qt takes control of the
surface) and in the second phase draw through
Qt the same drawable object used for the theme.

Change-Id: I4d76322a5640cb95f99f5605c5775051e6de7daf
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>

src/plugins/android/splashscreencontainerwidget.h

@@ -0,0 +1,88 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QVector>
+#include <QStackedWidget>
+
+QT_BEGIN_NAMESPACE
+class QCheckBox;
+class QColor;
+class QComboBox;
+class QToolButton;
+QT_END_NAMESPACE
+
+namespace TextEditor { class TextEditorWidget; }
+
+namespace Android {
+namespace Internal {
+
+class SplashScreenWidget;
+
+class SplashScreenContainerWidget : public QStackedWidget
+{
+    Q_OBJECT
+public:
+    explicit SplashScreenContainerWidget(QWidget *parent,
+                                         TextEditor::TextEditorWidget *textEditorWidget);
+    void loadImages();
+    bool hasImages() const;
+    bool hasPortraitImages() const;
+    bool hasLandscapeImages() const;
+    bool isSticky() const;
+    void setSticky(bool sticky);
+    QString imageName() const;
+    QString portraitImageName() const;
+    QString landscapeImageName() const;
+    void checkSplashscreenImage(const QString &name);
+    bool isSplashscreenEnabled();
+signals:
+    void splashScreensModified();
+
+private:
+    void loadSplashscreenDrawParams(const QString &name);
+    void setBackgroundColor(const QColor &color);
+    void setImageShowMode(const QString &mode);
+    void createSplashscreenThemes();
+    void clearAll();
+
+    TextEditor::TextEditorWidget *m_textEditorWidget = nullptr;
+    QVector<SplashScreenWidget *> m_imageWidgets;
+    QVector<SplashScreenWidget *> m_portraitImageWidgets;
+    QVector<SplashScreenWidget *> m_landscapeImageWidgets;
+    bool m_splashScreenSticky = false;
+    QColor m_splashScreenBackgroundColor;
+    QCheckBox *m_stickyCheck = nullptr;
+    QComboBox *m_imageShowMode = nullptr;
+    QToolButton *m_backgroundColor = nullptr;
+    QToolButton *m_masterImage = nullptr;
+    QToolButton *m_portraitMasterImage = nullptr;
+    QToolButton *m_landscapeMasterImage = nullptr;
+    QToolButton *m_convertSplashscreen = nullptr;
+};
+
+} // namespace Internal
+} // namespace Android