qxtspanslider_p.h

/****************************************************************************
 **
 ** Copyright (C) Qxt Foundation. Some rights reserved.
 **
 ** This file is part of the QxtGui module of the Qxt library.
 **
 ** This library is free software; you can redistribute it and/or modify it
 ** under the terms of the Common Public License, version 1.0, as published
 ** by IBM, and/or under the terms of the GNU Lesser General Public License,
 ** version 2.1, as published by the Free Software Foundation.
 **
 ** This file is provided "AS IS", without WARRANTIES OR CONDITIONS OF ANY
 ** KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
 ** WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR
 ** FITNESS FOR A PARTICULAR PURPOSE.
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 ** You should have received a copy of the CPL and the LGPL along with this
 ** file. See the LICENSE file and the cpl1.0.txt/lgpl-2.1.txt files
 ** included with the source distribution for more information.
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 ****************************************************************************/
#ifndef QXTSPANSLIDER_P_H
#define QXTSPANSLIDER_P_H

#include <QStyle>
#include <QObject>
#include "qxtspanslider.h"

QT_FORWARD_DECLARE_CLASS(QStylePainter)
QT_FORWARD_DECLARE_CLASS(QStyleOptionSlider)

class QxtSpanSliderPrivate : public QObject, public QxtPrivate<QxtSpanSlider>
{
    Q_OBJECT

public:
    QXT_DECLARE_PUBLIC(QxtSpanSlider)

    enum SpanHandle
    {
        NoHandle,
        LowerHandle,
        UpperHandle
    };

    QxtSpanSliderPrivate();
    void initStyleOption(QStyleOptionSlider* option, SpanHandle handle = UpperHandle) const;
    int pick(const QPoint& pt) const
    {
        return qxt_p().orientation() == Qt::Horizontal ? pt.x() : pt.y();
    }
    int pixelPosToRangeValue(int pos) const;
    void handleMousePress(const QPoint& pos, QStyle::SubControl& control, int value, SpanHandle handle);
    void drawHandle(QStylePainter* painter, SpanHandle handle) const;
    void setupPainter(QPainter* painter, Qt::Orientation orientation, qreal x1, qreal y1, qreal x2, qreal y2) const;
    void drawSpan(QStylePainter* painter, const QRect& rect) const;
    void triggerAction(QAbstractSlider::SliderAction action, bool main);
    void swapControls();

    int lower;
    int upper;
    int lowerPos;
    int upperPos;
    int offset;
    int position;
    SpanHandle lastPressed;
    SpanHandle mainControl;
    QStyle::SubControl lowerPressed;
    QStyle::SubControl upperPressed;
    QxtSpanSlider::HandleMovementMode movement;
    bool firstMovement;
    bool blockTracking;

public Q_SLOTS:
    void updateRange(int min, int max);
    void movePressedHandle();
};

#endif // QXTSPANSLIDER_P_H