Implement ColorGradient for qml

Reimplementation of qml's Gradient type, which unfortunately cannot be
used by 3rd party modules, as the implementation classes are private.

Task-number: QTRD-2328
Change-Id: Ib984b07f6771d26a9e37fd5f78016b7ba0bd7ce0
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/datavisualizationqml2/colorgradient_p.h b/src/datavisualizationqml2/colorgradient_p.h
new file mode 100644
index 00000000..37d3e407
--- /dev/null
+++ b/src/datavisualizationqml2/colorgradient_p.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the QtDataVisualization module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the QtDataVisualization 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.
+
+#ifndef COLORGRADIENT_P_H
+#define COLORGRADIENT_P_H
+
+#include "datavisualizationglobal_p.h"
+#include <QColor>
+#include <QQmlListProperty>
+
+QT_DATAVISUALIZATION_BEGIN_NAMESPACE
+
+class ColorGradientStop : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(qreal position READ position WRITE setPosition)
+    Q_PROPERTY(QColor color READ color WRITE setColor)
+
+public:
+    ColorGradientStop(QObject *parent = 0);
+
+    qreal position() const;
+    void setPosition(qreal position);
+
+    QColor color() const;
+    void setColor(const QColor &color);
+
+private:
+    void updateGradient();
+
+private:
+    qreal m_position;
+    QColor m_color;
+};
+
+class ColorGradient : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QQmlListProperty<ColorGradientStop> stops READ stops)
+    Q_CLASSINFO("DefaultProperty", "stops")
+
+public:
+    ColorGradient(QObject *parent = 0);
+    ~ColorGradient();
+
+    QQmlListProperty<ColorGradientStop> stops();
+
+Q_SIGNALS:
+    void updated();
+
+private:
+    void doUpdate();
+
+private:
+    QList<ColorGradientStop *> m_stops;
+
+    friend class ColorGradientStop;
+    friend class DeclarativeSurface;
+};
+
+QT_DATAVISUALIZATION_END_NAMESPACE
+
+#endif