/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the Qt3Support module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "q3rangecontrol.h"+
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+
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#ifndef QT_NO_SPINWIDGET+
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+
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#include "qabstractspinbox.h"+
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#include "qevent.h"+
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#include "qpainter.h"+
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#include "qrect.h"+
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#include "qstyle.h"+
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#include "qstyleoption.h"+
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#include "qtimer.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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class Q3SpinWidgetPrivate+
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{+
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public:+
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    Q3SpinWidgetPrivate()+
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        : upEnabled(true),+
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          downEnabled(true),+
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          theButton(0),+
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          buttonDown(0),+
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          timerUp(0),+
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          bsyms(Q3SpinWidget::UpDownArrows),+
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          ed (0) {}+
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    uint upEnabled :1;+
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    uint downEnabled :1;+
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    uint theButton :2;+
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    uint buttonDown :2;+
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    uint timerUp : 1;+
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    QRect up;+
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    QRect down;+
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    QTimer auRepTimer;+
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    Q3SpinWidget::ButtonSymbols bsyms;+
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    QWidget *ed;+
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    void startTimer(int msec) { auRepTimer.start(msec, true); }+
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    void startTimer(bool up, int msec) { timerUp = up; startTimer(msec); }+
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    void stopTimer() { auRepTimer.stop(); }+
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};+
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+
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/*!+
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    \class Q3SpinWidget+
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    \brief The Q3SpinWidget class is an internal range control related class.+
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+
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    \internal+
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+
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    Constructs an empty range control widget with parent \a parent+
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    called \a name.+
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+
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*/+
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+
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Q3SpinWidget::Q3SpinWidget(QWidget* parent, const char* name)+
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    : QWidget(parent, name)+
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{+
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    d = new Q3SpinWidgetPrivate();+
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    connect(&d->auRepTimer, SIGNAL(timeout()), this, SLOT(timerDone()));+
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    setFocusPolicy(Qt::StrongFocus);+
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+
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    arrange();+
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    updateDisplay();+
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}+
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+
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+
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/*! Destroys the object and frees any allocated resources.+
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+
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*/+
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+
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Q3SpinWidget::~Q3SpinWidget()+
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{+
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    delete d;+
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}+
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+
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/*! */+
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QWidget * Q3SpinWidget::editWidget()+
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{+
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    return d->ed;+
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}+
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+
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/*!+
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    Sets the editing widget to \a w.+
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*/+
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void Q3SpinWidget::setEditWidget(QWidget * w)+
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{+
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    if (w) {+
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        if (w->parentWidget() != this)+
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            w->setParent(this);+
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        setFocusProxy(w);+
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    }+
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    d->ed = w;+
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    arrange();+
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    updateDisplay();+
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}+
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+
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/*! \reimp+
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+
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*/+
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+
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void Q3SpinWidget::mousePressEvent(QMouseEvent *e)+
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{+
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    if (e->button() != Qt::LeftButton) {+
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        d->stopTimer();+
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        d->buttonDown = 0;+
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        d->theButton = 0;+
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        repaint(d->down.united(d->up));+
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        return;+
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    }+
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+
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    uint oldButtonDown = d->buttonDown;+
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+
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    if (d->down.contains(e->pos()) && d->downEnabled)+
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        d->buttonDown = 1;+
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    else if (d->up.contains(e->pos()) && d->upEnabled)+
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        d->buttonDown = 2;+
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    else+
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        d->buttonDown = 0;+
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+
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    d->theButton = d->buttonDown;+
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    if (oldButtonDown != d->buttonDown) {+
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        if (!d->buttonDown) {+
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            repaint(d->down.united(d->up));+
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        } else if (d->buttonDown & 1) {+
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            repaint(d->down);+
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            stepDown();+
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            d->startTimer(false, 300);+
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        } else if (d->buttonDown & 2) {+
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            repaint(d->up);+
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            stepUp();+
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            d->startTimer(true, 300);+
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        }+
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    }+
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+
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    if (!oldButtonDown && !d->buttonDown)+
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        e->ignore();+
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+
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}+
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+
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static QStyleOptionSpinBox getStyleOption(const Q3SpinWidget *spin)+
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{+
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    QStyleOptionSpinBox opt;+
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    opt.init(spin);+
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    opt.frame = true;+
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    opt.subControls = 0;+
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    opt.buttonSymbols = (QAbstractSpinBox::ButtonSymbols)spin->buttonSymbols();+
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    opt.stepEnabled = 0;+
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    if (spin->isUpEnabled())+
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        opt.stepEnabled |= QAbstractSpinBox::StepUpEnabled;+
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    if (spin->isDownEnabled())+
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        opt.stepEnabled |= QAbstractSpinBox::StepDownEnabled;+
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    opt.activeSubControls = 0;+
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    return opt;+
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}+
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+
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/*!+
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+
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*/+
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+
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void Q3SpinWidget::arrange()+
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{+
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    QStyleOptionSpinBox opt = getStyleOption(this);+
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    d->up = style()->subControlRect(QStyle::CC_SpinBox, &opt, QStyle::SC_SpinBoxUp, this);+
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    d->down = style()->subControlRect(QStyle::CC_SpinBox, &opt, QStyle::SC_SpinBoxDown, this);+
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    if (d->ed) {+
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        QRect r = style()->subControlRect(QStyle::CC_SpinBox, &opt,+
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                                          QStyle::SC_SpinBoxEditField, this);+
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        d->ed->setGeometry(r);+
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    }+
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}+
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+
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/*!+
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+
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*/+
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+
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void Q3SpinWidget::stepUp()+
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{+
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    emit stepUpPressed();+
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}+
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+
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void Q3SpinWidget::resizeEvent(QResizeEvent*)+
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{+
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    arrange();+
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}+
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+
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/*!+
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+
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*/+
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+
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void Q3SpinWidget::stepDown()+
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{+
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    emit stepDownPressed();+
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}+
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+
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+
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void Q3SpinWidget::timerDone()+
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{+
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    // we use a double timer to make it possible for users to do+
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    // something with 0-timer on valueChanged.+
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    QTimer::singleShot(1, this, SLOT(timerDoneEx()));+
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}+
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+
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void Q3SpinWidget::timerDoneEx()+
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{+
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    if (!d->buttonDown)+
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        return;+
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    if (d->timerUp)+
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        stepUp();+
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    else+
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        stepDown();+
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    d->startTimer(100);+
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}+
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+
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+
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/*!+
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    The event is passed in \a e.+
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*/+
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+
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void Q3SpinWidget::mouseReleaseEvent(QMouseEvent *e)+
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{+
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    if (e->button() != Qt::LeftButton)+
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        return;+
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+
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    uint oldButtonDown = d->theButton;+
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    d->theButton = 0;+
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    if (oldButtonDown != d->theButton) {+
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        if (oldButtonDown & 1)+
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            repaint(d->down);+
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        else if (oldButtonDown & 2)+
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            repaint(d->up);+
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    }+
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    d->stopTimer();+
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    d->buttonDown = 0;+
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+
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    if (!oldButtonDown && !d->buttonDown)+
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        e->ignore();+
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}+
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+
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+
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/*!+
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    The event is passed in \a e.+
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*/+
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+
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void Q3SpinWidget::mouseMoveEvent(QMouseEvent *e)+
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{+
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    if (!(e->state() & Qt::LeftButton))+
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        return;+
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+
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    uint oldButtonDown = d->theButton;+
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    if (oldButtonDown & 1 && !d->down.contains(e->pos())) {+
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        d->stopTimer();+
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        d->theButton = 0;+
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        repaint(d->down);+
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    } else if (oldButtonDown & 2 && !d->up.contains(e->pos())) {+
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        d->stopTimer();+
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        d->theButton = 0;+
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        repaint(d->up);+
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    } else if (!oldButtonDown && d->up.contains(e->pos()) && d->buttonDown & 2) {+
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        d->startTimer(500);+
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        d->theButton = 2;+
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        repaint(d->up);+
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    } else if (!oldButtonDown && d->down.contains(e->pos()) && d->buttonDown & 1) {+
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        d->startTimer(500);+
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        d->theButton = 1;+
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        repaint(d->down);+
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    }+
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+
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    if (!oldButtonDown && !d->buttonDown)+
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        e->ignore();+
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}+
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+
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+
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/*!+
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    The event is passed in \a e.+
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*/+
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#ifndef QT_NO_WHEELEVENT+
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void Q3SpinWidget::wheelEvent(QWheelEvent *e)+
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{+
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    e->accept();+
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    static float offset = 0;+
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    static Q3SpinWidget* offset_owner = 0;+
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    if (offset_owner != this) {+
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        offset_owner = this;+
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        offset = 0;+
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    }+
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    offset += -e->delta()/120;+
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    if (QABS(offset) < 1)+
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        return;+
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    int ioff = int(offset);+
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    int i;+
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    for(i=0; i < QABS(ioff); i++)+
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        offset > 0 ? stepDown() : stepUp();+
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    offset -= ioff;+
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}+
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#endif+
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+
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/*!+
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+
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*/+
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void Q3SpinWidget::paintEvent(QPaintEvent *)+
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{+
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    QPainter p(this);+
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    QStyleOptionSpinBox opt = getStyleOption(this);+
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+
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    if (d->theButton & 1)+
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        opt.activeSubControls = QStyle::SC_SpinBoxDown;+
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    else if (d->theButton & 2)+
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        opt.activeSubControls = QStyle::SC_SpinBoxUp;+
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    else+
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        opt.activeSubControls = QStyle::SC_None;+
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    opt.rect = style()->subControlRect(QStyle::CC_SpinBox, &opt, QStyle::SC_SpinBoxFrame, this);+
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    opt.subControls = QStyle::SC_All;+
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    style()->drawComplexControl(QStyle::CC_SpinBox, &opt, &p, this);+
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}+
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+
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+
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// ### What does the QEvent passed in contain? It used to be the previous style.+
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/*!+
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    The previous style is passed in \a ev.+
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*/+
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void Q3SpinWidget::changeEvent(QEvent *ev)+
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{+
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    if(ev->type() == QEvent::StyleChange) {+
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        arrange();+
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    } else if(ev->type() == QEvent::ActivationChange) {+
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        if (!isActiveWindow() && d->buttonDown) {         //was active, but lost focus+
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            d->stopTimer();+
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            d->buttonDown = 0;+
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            d->theButton = 0;+
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        }+
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    } else if(ev->type() == QEvent::EnabledChange) {+
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        d->upEnabled = isEnabled();+
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        d->downEnabled = isEnabled();+
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        updateDisplay();+
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    }+
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    QWidget::changeEvent(ev);+
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}+
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+
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/*!+
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*/+
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+
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QRect Q3SpinWidget::upRect() const+
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{+
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    return d->up;+
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}+
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+
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/*!+
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*/+
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+
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QRect Q3SpinWidget::downRect() const+
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{+
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    return d->down;+
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}+
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+
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/*!+
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*/+
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+
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void Q3SpinWidget::updateDisplay()+
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{+
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    if (!isEnabled()) {+
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        d->upEnabled = false;+
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        d->downEnabled = false;+
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    }+
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    if (d->theButton & 1 && (d->downEnabled) == 0) {+
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        d->theButton &= ~1;+
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        d->buttonDown &= ~1;+
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    }+
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+
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    if (d->theButton & 2 && (d->upEnabled) == 0) {+
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        d->theButton &= ~2;+
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        d->buttonDown &= ~2;+
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    }+
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    repaint();+
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}+
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+
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/*!+
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    Sets up-enabled to \a on.+
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*/+
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+
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void Q3SpinWidget::setUpEnabled(bool on)+
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{+
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    if ((bool)d->upEnabled != on) {+
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        d->upEnabled = on;+
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        updateDisplay();+
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    }+
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}+
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+
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/*!+
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*/+
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+
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bool Q3SpinWidget::isUpEnabled() const+
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{+
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    return d->upEnabled;+
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}+
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+
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/*!+
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    Sets down-enabled to \a on.+
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*/+
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+
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void Q3SpinWidget::setDownEnabled(bool on)+
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{+
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    if ((bool)d->downEnabled != on) {+
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        d->downEnabled = on;+
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        updateDisplay();+
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    }+
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}+
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+
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/*!+
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*/+
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+
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bool Q3SpinWidget::isDownEnabled() const+
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{+
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    return d->downEnabled;+
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}+
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+
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/*!+
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    Sets the button symbol to \a bs.+
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*/+
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+
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void Q3SpinWidget::setButtonSymbols(ButtonSymbols bs)+
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{+
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    d->bsyms = bs;+
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}+
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+
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/*!+
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*/+
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+
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Q3SpinWidget::ButtonSymbols Q3SpinWidget::buttonSymbols() const+
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{+
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    return d->bsyms;+
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}+
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+
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QT_END_NAMESPACE+
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+
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#endif+
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