CircularSlider.hpp Example File

    /* Copyright (c) 2012, 2013  BlackBerry Limited.
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     * http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    #ifndef CIRCULARSLIDER_HPP
    #define CIRCULARSLIDER_HPP

    #include <bb/cascades/CustomControl>
    #include <bb/cascades/Image>
    #include <bb/cascades/ImplicitAnimationController>

    #include <QPair>
    #include <QVector>

    namespace bb {
    namespace cascades {
    class Container;
    class ImageView;
    class TouchEvent;
    }
    }

    class CircularSlider: public bb::cascades::CustomControl
    {
        Q_OBJECT

        Q_PROPERTY(float value READ value WRITE setValue NOTIFY valueChanged FINAL)

    public:
        CircularSlider(bb::cascades::Container *parent = 0);

        float value() const;
        void setValue(float value);

    Q_SIGNALS:
        void valueChanged(float value);

    private Q_SLOTS:
        void onSliderHandleTouched(bb::cascades::TouchEvent *touchEvent);
        void onWidthChanged(float width);
        void onHeightChanged(float height);

    private:
        void onSizeChanged();
        void processRawCoordinates(float inX, float inY);

        bb::cascades::Container *m_rootContainer;
        bb::cascades::ImageView *m_trackImage;

        float m_width;
        float m_height;
        float m_revAngle;

        float m_centerX;
        float m_centerY;
        float m_radiusCircle;

        bb::cascades::Image m_handleOn;
        bb::cascades::Image m_handleOff;
        bb::cascades::ImageView *m_handle;
        bb::cascades::Container *m_handleContainer;
        bb::cascades::ImplicitAnimationController m_handleImplicitAnimationController;

        QVector<QPair<float, float> > m_pointsOnCircumference;
        float m_angle;
        float m_value;
    };

    #endif