Add private Color singleton

This will be used by various styles.

Change-Id: I50b22c1fab04e7fd8fb1fe0b74630c721b6f8c6f
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

4 files changed, 131 insertions, 1 deletions

diff --git a/src/imports/controls/qtquickcontrols2plugin.cpp b/src/imports/controls/qtquickcontrols2plugin.cpp
index 092bfe47..2cd97daa 100644
--- a/src/imports/controls/qtquickcontrols2plugin.cpp
+++ b/src/imports/controls/qtquickcontrols2plugin.cpp
@@ -36,6 +36,7 @@
 
 #include <QtCore/private/qfileselector_p.h>
 #include <QtQuickControls2/qquickstyle.h>
+#include <QtQuickControls2/private/qquickcolor_p.h>
 #include <QtQuickControls2/private/qquickiconimage_p.h>
 #include <QtQuickControls2/private/qquickplaceholdertext_p.h>
 #include <QtQuickControls2/private/qquickstyle_p.h>
@@ -162,6 +163,13 @@ static QObject *styleSingleton(QQmlEngine *engine, QJSEngine *scriptEngine)
     return new QQuickDefaultStyle;
 }
 
+static QObject *colorSingleton(QQmlEngine *engine, QJSEngine *scriptEngine)
+{
+    Q_UNUSED(engine);
+    Q_UNUSED(scriptEngine);
+    return new QQuickColor;
+}
+
 void QtQuickControls2Plugin::initializeEngine(QQmlEngine *engine, const char *uri)
 {
     Q_UNUSED(uri);
@@ -184,7 +192,7 @@ void QtQuickControls2Plugin::initializeEngine(QQmlEngine *engine, const char *ur
     qmlRegisterType(typeUrl(QStringLiteral("SwitchIndicator.qml")), import, 2, 0, "SwitchIndicator");
 
     qmlRegisterType<QQuickIconImage>(import, 2, 3, "IconImage");
-
+    qmlRegisterSingletonType<QQuickColor>(import, 2, 3, "Color", colorSingleton);
 }
 
 QT_END_NAMESPACE
diff --git a/src/quickcontrols2/qquickcolor.cpp b/src/quickcontrols2/qquickcolor.cpp
new file mode 100644
index 00000000..bede2a88
--- /dev/null
+++ b/src/quickcontrols2/qquickcolor.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickcolor_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QQuickColor::QQuickColor(QObject *parent) :
+    QObject(parent)
+{
+}
+
+QColor QQuickColor::transparent(const QColor &color, qreal opacity) const
+{
+    return QColor(color.red(), color.green(), color.blue(), qBound(0.0, opacity, 1.0) * 255);
+}
+
+QT_END_NAMESPACE
diff --git a/src/quickcontrols2/qquickcolor_p.h b/src/quickcontrols2/qquickcolor_p.h
new file mode 100644
index 00000000..85578359
--- /dev/null
+++ b/src/quickcontrols2/qquickcolor_p.h
@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 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 QQUICKCOLOR_P_H
+#define QQUICKCOLOR_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 <QtCore/qobject.h>
+#include <QtGui/qcolor.h>
+#include <QtQuickControls2/private/qtquickcontrols2global_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_QUICKCONTROLS2_PRIVATE_EXPORT QQuickColor : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit QQuickColor(QObject *parent = nullptr);
+
+    Q_INVOKABLE QColor transparent(const QColor &color, qreal opacity) const;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQUICKCOLOR_P_H
diff --git a/src/quickcontrols2/quickcontrols2.pri b/src/quickcontrols2/quickcontrols2.pri
index 2bcf71da..ed01660e 100644
--- a/src/quickcontrols2/quickcontrols2.pri
+++ b/src/quickcontrols2/quickcontrols2.pri
@@ -1,5 +1,6 @@
 HEADERS += \
     $$PWD/qquickanimatednode_p.h \
+    $$PWD/qquickcolor_p.h \
     $$PWD/qquickcolorimageprovider_p.h \
     $$PWD/qquickiconimage_p.h \
     $$PWD/qquickiconimage_p_p.h \
@@ -15,6 +16,7 @@ HEADERS += \
 
 SOURCES += \
     $$PWD/qquickanimatednode.cpp \
+    $$PWD/qquickcolor.cpp \
     $$PWD/qquickcolorimageprovider.cpp \
     $$PWD/qquickiconimage.cpp \
     $$PWD/qquickplaceholdertext.cpp \