diff -r 000000000000 -r 1918ee327afb doc/src/snippets/qabstractsliderisnippet.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/qabstractsliderisnippet.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,510 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+QAbstractSliderPrivate::QAbstractSliderPrivate()
+    : minimum(0), maximum(99), singleStep(1), pageStep(10),
+      value(0), position(0), pressValue(-1), tracking(true), blocktracking(false), pressed(false),
+      invertedAppearance(false), invertedControls(false),
+      orientation(Qt::Horizontal), repeatAction(QAbstractSlider::SliderNoAction)
+{
+}
+
+QAbstractSliderPrivate::~QAbstractSliderPrivate()
+{
+}
+
+oid QAbstractSlider::setRange(int min, int max)
+{
+    Q_D(QAbstractSlider);
+    int oldMin = d->minimum;
+    int oldMax = d->maximum;
+    d->minimum = min;
+    d->maximum = qMax(min, max);
+    if (oldMin != d->minimum || oldMax != d->maximum) {
+        sliderChange(SliderRangeChange);
+        emit rangeChanged(d->minimum, d->maximum);
+        setValue(d->value); // re-bound
+    }
+}
+
+
+void QAbstractSliderPrivate::setSteps(int single, int page)
+{
+    Q_Q(QAbstractSlider);
+    singleStep = qAbs(single);
+    pageStep = qAbs(page);
+    q->sliderChange(QAbstractSlider::SliderStepsChange);
+}
+
+AbstractSlider::QAbstractSlider(QWidget *parent)
+    :QWidget(*new QAbstractSliderPrivate, parent, 0)
+{
+}
+
+QAbstractSlider::QAbstractSlider(QAbstractSliderPrivate &dd, QWidget *parent)
+    :QWidget(dd, parent, 0)
+{
+}
+
+QAbstractSlider::~QAbstractSlider()
+{
+}
+
+void QAbstractSlider::setOrientation(Qt::Orientation orientation)
+{
+    Q_D(QAbstractSlider);
+    if (d->orientation == orientation)
+        return;
+
+    d->orientation = orientation;
+    if (!testAttribute(Qt::WA_WState_OwnSizePolicy)) {
+        QSizePolicy sp = sizePolicy();
+        sp.transpose();
+        setSizePolicy(sp);
+        setAttribute(Qt::WA_WState_OwnSizePolicy, false);
+    }
+    update();
+    updateGeometry();
+}
+
+Qt::Orientation QAbstractSlider::orientation() const
+{
+    Q_D(const QAbstractSlider);
+    return d->orientation;
+}
+
+
+void QAbstractSlider::setMinimum(int min)
+{
+    Q_D(QAbstractSlider);
+    setRange(min, qMax(d->maximum, min));
+}
+
+int QAbstractSlider::minimum() const
+{
+    Q_D(const QAbstractSlider);
+    return d->minimum;
+}
+
+
+void QAbstractSlider::setMaximum(int max)
+{
+    Q_D(QAbstractSlider);
+    setRange(qMin(d->minimum, max), max);
+}
+
+int QAbstractSlider::maximum() const
+{
+    Q_D(const QAbstractSlider);
+    return d->maximum;
+}
+
+
+
+void QAbstractSlider::setSingleStep(int step)
+{
+    Q_D(QAbstractSlider);
+    d->setSteps(step, d->pageStep);
+}
+
+int QAbstractSlider::singleStep() const
+{
+    Q_D(const QAbstractSlider);
+    return d->singleStep;
+}
+
+
+void QAbstractSlider::setPageStep(int step)
+{
+    Q_D(QAbstractSlider);
+    d->setSteps(d->singleStep, step);
+}
+
+int QAbstractSlider::pageStep() const
+{
+    Q_D(const QAbstractSlider);
+    return d->pageStep;
+}
+
+oid QAbstractSlider::setTracking(bool enable)
+{
+    Q_D(QAbstractSlider);
+    d->tracking = enable;
+}
+
+bool QAbstractSlider::hasTracking() const
+{
+    Q_D(const QAbstractSlider);
+    return d->tracking;
+}
+
+
+
+void QAbstractSlider::setSliderDown(bool down)
+{
+    Q_D(QAbstractSlider);
+    bool doEmit = d->pressed != down;
+
+    d->pressed = down;
+
+    if (doEmit) {
+        if (down)
+            emit sliderPressed();
+        else
+            emit sliderReleased();
+    }
+
+    if (!down && d->position != d->value)
+        triggerAction(SliderMove);
+}
+
+bool QAbstractSlider::isSliderDown() const
+{
+    Q_D(const QAbstractSlider);
+    return d->pressed;
+}
+
+
+void QAbstractSlider::setSliderPosition(int position)
+{
+    Q_D(QAbstractSlider);
+    position = d->bound(position);
+    if (position == d->position)
+        return;
+    d->position = position;
+    if (!d->tracking)
+        update();
+    if (d->pressed)
+        emit sliderMoved(position);
+    if (d->tracking && !d->blocktracking)
+        triggerAction(SliderMove);
+}
+
+int QAbstractSlider::sliderPosition() const
+{
+    Q_D(const QAbstractSlider);
+    return d->position;
+}
+
+
+
+int QAbstractSlider::value() const
+{
+    Q_D(const QAbstractSlider);
+    return d->value;
+}
+
+//! [0]
+void QAbstractSlider::setValue(int value)
+//! [0]
+{
+    Q_D(QAbstractSlider);
+    value = d->bound(value);
+    if (d->value == value && d->position == value)
+        return;
+    d->value = value;
+    if (d->position != value) {
+        d->position = value;
+        if (d->pressed)
+            emit sliderMoved((d->position = value));
+    }
+#ifndef QT_NO_ACCESSIBILITY
+//! [1]
+    QAccessible::updateAccessibility(this, 0, QAccessible::ValueChanged);
+//! [1]
+#endif
+    sliderChange(SliderValueChange);
+    emit valueChanged(value);
+//! [2]
+}
+//! [2]
+
+bool QAbstractSlider::invertedAppearance() const
+{
+    Q_D(const QAbstractSlider);
+    return d->invertedAppearance;
+}
+
+void QAbstractSlider::setInvertedAppearance(bool invert)
+{
+    Q_D(QAbstractSlider);
+    d->invertedAppearance = invert;
+    update();
+}
+
+
+
+bool QAbstractSlider::invertedControls() const
+{
+    Q_D(const QAbstractSlider);
+    return d->invertedControls;
+}
+
+void QAbstractSlider::setInvertedControls(bool invert)
+{
+    Q_D(QAbstractSlider);
+    d->invertedControls = invert;
+}
+
+void QAbstractSlider::triggerAction(SliderAction action)
+{
+    Q_D(QAbstractSlider);
+    d->blocktracking = true;
+    switch (action) {
+    case SliderSingleStepAdd:
+        setSliderPosition(d->value + d->singleStep);
+        break;
+    case SliderSingleStepSub:
+        setSliderPosition(d->value - d->singleStep);
+        break;
+    case SliderPageStepAdd:
+        setSliderPosition(d->value + d->pageStep);
+        break;
+    case SliderPageStepSub:
+        setSliderPosition(d->value - d->pageStep);
+        break;
+    case SliderToMinimum:
+        setSliderPosition(d->minimum);
+        break;
+    case SliderToMaximum:
+        setSliderPosition(d->maximum);
+        break;
+    case SliderMove:
+    case SliderNoAction:
+        break;
+    };
+    emit actionTriggered(action);
+    d->blocktracking = false;
+    setValue(d->position);
+}
+
+void QAbstractSlider::setRepeatAction(SliderAction action, int thresholdTime, int repeatTime)
+{
+    Q_D(QAbstractSlider);
+    if ((d->repeatAction = action) == SliderNoAction) {
+        d->repeatActionTimer.stop();
+    } else {
+        d->repeatActionTime = repeatTime;
+        d->repeatActionTimer.start(thresholdTime, this);
+    }
+}
+
+QAbstractSlider::SliderAction QAbstractSlider::repeatAction() const
+{
+    Q_D(const QAbstractSlider);
+    return d->repeatAction;
+}
+
+void QAbstractSlider::timerEvent(QTimerEvent *e)
+{
+    Q_D(QAbstractSlider);
+    if (e->timerId() == d->repeatActionTimer.timerId()) {
+        if (d->repeatActionTime) { // was threshold time, use repeat time next time
+            d->repeatActionTimer.start(d->repeatActionTime, this);
+            d->repeatActionTime = 0;
+        }
+        if (d->repeatAction == SliderPageStepAdd)
+            d->setAdjustedSliderPosition(d->value + d->pageStep);
+        else if (d->repeatAction == SliderPageStepSub)
+            d->setAdjustedSliderPosition(d->value - d->pageStep);
+        else
+            triggerAction(d->repeatAction);
+    }
+}
+
+oid QAbstractSlider::sliderChange(SliderChange)
+{
+    update();
+}
+
+
+#ifndef QT_NO_WHEELEVENT
+void QAbstractSlider::wheelEvent(QWheelEvent * e)
+{
+    Q_D(QAbstractSlider);
+    e->ignore();
+    if (e->orientation() != d->orientation && !rect().contains(e->pos()))
+        return;
+
+    static qreal offset = 0;
+    static QAbstractSlider *offset_owner = 0;
+    if (offset_owner != this){
+        offset_owner = this;
+        offset = 0;
+    }
+
+    int step = qMin(QApplication::wheelScrollLines() * d->singleStep, d->pageStep);
+    if ((e->modifiers() & Qt::ControlModifier) || (e->modifiers() & Qt::ShiftModifier))
+        step = d->pageStep;
+    offset += e->delta() * step / 120;
+    if (d->invertedControls)
+        offset = -offset;
+
+    if (qAbs(offset) < 1)
+        return;
+
+    int prevValue = d->value;
+    d->position = d->value + int(offset); // value will be updated by triggerAction()
+    triggerAction(SliderMove);
+    if (prevValue == d->value) {
+        offset = 0;
+    } else {
+        offset -= int(offset);
+        e->accept();
+    }
+}
+#endif
+void QAbstractSlider::keyPressEvent(QKeyEvent *ev)
+{
+    Q_D(QAbstractSlider);
+    SliderAction action = SliderNoAction;
+    switch (ev->key()) {
+#ifdef QT_KEYPAD_NAVIGATION
+        case Qt::Key_Select:
+            if (QApplication::keypadNavigationEnabled())
+                setEditFocus(!hasEditFocus());
+            else
+                ev->ignore();
+            break;
+        case Qt::Key_Back:
+            if (QApplication::keypadNavigationEnabled() && hasEditFocus()) {
+                setValue(d->origValue);
+                setEditFocus(false);
+            } else
+                ev->ignore();
+            break;
+#endif
+
+        // It seems we need to use invertedAppearance for Left and right, otherwise, things look weird.
+        case Qt::Key_Left:
+#ifdef QT_KEYPAD_NAVIGATION
+            if (QApplication::keypadNavigationEnabled() && !hasEditFocus()) {
+                ev->ignore();
+                return;
+            }
+            if (QApplication::keypadNavigationEnabled() && d->orientation == Qt::Vertical)
+                action = d->invertedControls ? SliderSingleStepSub : SliderSingleStepAdd;
+            else
+#endif
+            action = !d->invertedAppearance ? SliderSingleStepSub : SliderSingleStepAdd;
+            break;
+        case Qt::Key_Right:
+#ifdef QT_KEYPAD_NAVIGATION
+            if (QApplication::keypadNavigationEnabled() && !hasEditFocus()) {
+                ev->ignore();
+                return;
+            }
+            if (QApplication::keypadNavigationEnabled() && d->orientation == Qt::Vertical)
+                action = d->invertedControls ? SliderSingleStepAdd : SliderSingleStepSub;
+            else
+#endif
+            action = !d->invertedAppearance ? SliderSingleStepAdd : SliderSingleStepSub;
+            break;
+        case Qt::Key_Up:
+#ifdef QT_KEYPAD_NAVIGATION
+            if (QApplication::keypadNavigationEnabled()) {
+                ev->ignore();
+                break;
+            }
+#endif
+            action = d->invertedControls ? SliderSingleStepSub : SliderSingleStepAdd;
+            break;
+        case Qt::Key_Down:
+#ifdef QT_KEYPAD_NAVIGATION
+            if (QApplication::keypadNavigationEnabled()) {
+                ev->ignore();
+                break;
+            }
+#endif
+            action = d->invertedControls ? SliderSingleStepAdd : SliderSingleStepSub;
+            break;
+        case Qt::Key_PageUp:
+            action = d->invertedControls ? SliderPageStepSub : SliderPageStepAdd;
+            break;
+        case Qt::Key_PageDown:
+            action = d->invertedControls ? SliderPageStepAdd : SliderPageStepSub;
+            break;
+        case Qt::Key_Home:
+            action = SliderToMinimum;
+            break;
+        case Qt::Key_End:
+            action = SliderToMaximum;
+            break;
+        default:
+            ev->ignore();
+            break;
+    }
+    if (action)
+        triggerAction(action);
+}
+
+void QAbstractSlider::changeEvent(QEvent *ev)
+{
+    Q_D(QAbstractSlider);
+    switch (ev->type()) {
+    case QEvent::EnabledChange:
+        if (!isEnabled()) {
+            d->repeatActionTimer.stop();
+            setSliderDown(false);
+        }
+        // fall through...
+    default:
+        QWidget::changeEvent(ev);
+    }
+}
+
+bool QAbstractSlider::event(QEvent *e)
+{
+#ifdef QT_KEYPAD_NAVIGATION
+    Q_D(QAbstractSlider);
+    switch (e->type()) {
+    case QEvent::FocusIn:
+        d->origValue = d->value;
+        break;
+    default:
+        break;
+    }
+#endif
+    
+    return QWidget::event(e);
+}
+
+