Merge branch 'qt-master-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration into master-integration

* 'qt-master-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration: (94 commits)
  Not possible to enter negative values to widgets with numeric fields
  QmlViewer: Enable remote qml debugging
  QDeclarativeDebug: Warn user for Qt configured with -no-declarative-debug
  Improve Flickable dynamics and allow platform specific tweaking.
  Fixed the declarative headers and includes within qdoc.
  Removed invalid public slots section.
  Minor feature fix led to refactoring for i18n's sake.
  Fixed string-int concatenation issue.
  Fixed license headers for examples in 4.7
  qdoc: Allowed multiple values for certain metadata tags.
  Removing extra comma in `enum' declaration.
  Take phonon backend back in qt.iby
  Mac: p2 combobox regression fix
  win32-g++: Correct the order of linked Windows libraries
  Remove SIGBUS emission from QNetworkSession destruction.
  Remove obsolete files from qt.iby
  Fix QGradient stop with NaN position on Symbian.
  win32-g++: Correct the order of linked Windows libraries
  Fixing a traling space on if statement that fails in Solaris.
  Do not add project path to SYMBIAN_MATCHED_TRANSLATIONS if not needed
  ...

1 files changed, 163 insertions, 72 deletions

diff --git a/src/declarative/graphicsitems/qdeclarativeflickable.cpp b/src/declarative/graphicsitems/qdeclarativeflickable.cpp
index 566d025..1d50baf 100644
--- a/src/declarative/graphicsitems/qdeclarativeflickable.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeflickable.cpp
@@ -45,9 +45,40 @@
 #include <QGraphicsSceneMouseEvent>
 #include <QPointer>
 #include <QTimer>
+#include "qplatformdefs.h"
 
 QT_BEGIN_NAMESPACE
 
+// The maximum number of pixels a flick can overshoot
+#ifndef QML_FLICK_OVERSHOOT
+#define QML_FLICK_OVERSHOOT 200
+#endif
+
+// The number of samples to use in calculating the velocity of a flick
+#ifndef QML_FLICK_SAMPLEBUFFER
+#define QML_FLICK_SAMPLEBUFFER 3
+#endif
+
+// The number of samples to discard when calculating the flick velocity.
+// Touch panels often produce inaccurate results as the finger is lifted.
+#ifndef QML_FLICK_DISCARDSAMPLES
+#define QML_FLICK_DISCARDSAMPLES 1
+#endif
+
+// The default maximum velocity of a flick.
+#ifndef QML_FLICK_DEFAULTMAXVELOCITY
+#define QML_FLICK_DEFAULTMAXVELOCITY 2500
+#endif
+
+// The default deceleration of a flick.
+#ifndef QML_FLICK_DEFAULTDECELERATION
+#define QML_FLICK_DEFAULTDECELERATION 1750
+#endif
+
+// How much faster to decelerate when overshooting
+#ifndef QML_FLICK_OVERSHOOTFRICTION
+#define QML_FLICK_OVERSHOOTFRICTION 8
+#endif
 
 // FlickThreshold determines how far the "mouse" must have moved
 // before we perform a flick.
@@ -141,8 +172,9 @@ QDeclarativeFlickablePrivate::QDeclarativeFlickablePrivate()
     , hMoved(false), vMoved(false)
     , movingHorizontally(false), movingVertically(false)
     , stealMouse(false), pressed(false), interactive(true), calcVelocity(false)
-    , deceleration(500), maxVelocity(2000), reportedVelocitySmoothing(100)
-    , delayedPressEvent(0), delayedPressTarget(0), pressDelay(0), fixupDuration(600)
+    , deceleration(QML_FLICK_DEFAULTDECELERATION)
+    , maxVelocity(QML_FLICK_DEFAULTMAXVELOCITY), reportedVelocitySmoothing(100)
+    , delayedPressEvent(0), delayedPressTarget(0), pressDelay(0), fixupDuration(400)
     , fixupMode(Normal), vTime(0), visibleArea(0)
     , flickableDirection(QDeclarativeFlickable::AutoFlickDirection)
     , boundsBehavior(QDeclarativeFlickable::DragAndOvershootBounds)
@@ -176,19 +208,39 @@ void QDeclarativeFlickablePrivate::init()
 }
 
 /*
-    Returns the amount to overshoot by given a velocity.
-    Will be roughly in range 0 - size/4
+    Returns the amount to overshoot by given a view size.
+    Will be up to the lesser of 1/3 of the view size or QML_FLICK_OVERSHOOT
 */
-qreal QDeclarativeFlickablePrivate::overShootDistance(qreal velocity, qreal size)
+qreal QDeclarativeFlickablePrivate::overShootDistance(qreal size)
 {
     if (maxVelocity <= 0)
         return 0.0;
 
-    velocity = qAbs(velocity);
-    if (velocity > maxVelocity)
-        velocity = maxVelocity;
-    qreal dist = size / 4 * velocity / maxVelocity;
-    return dist;
+    return qMin(qreal(QML_FLICK_OVERSHOOT), size/3);
+}
+
+void QDeclarativeFlickablePrivate::AxisData::addVelocitySample(qreal v, qreal maxVelocity)
+{
+    if (v > maxVelocity)
+        v = maxVelocity;
+    else if (v < -maxVelocity)
+        v = -maxVelocity;
+    velocityBuffer.append(v);
+    if (velocityBuffer.count() > QML_FLICK_SAMPLEBUFFER)
+        velocityBuffer.remove(0);
+}
+
+void QDeclarativeFlickablePrivate::AxisData::updateVelocity()
+{
+    if (velocityBuffer.count() > QML_FLICK_DISCARDSAMPLES) {
+        velocity = 0;
+        int count = velocityBuffer.count()-QML_FLICK_DISCARDSAMPLES;
+        for (int i = 0; i < count; ++i) {
+            qreal v = velocityBuffer.at(i);
+            velocity += v;
+        }
+        velocity /= count;
+    }
 }
 
 void QDeclarativeFlickablePrivate::itemGeometryChanged(QDeclarativeItem *item, const QRectF &newGeom, const QRectF &oldGeom)
@@ -220,15 +272,12 @@ void QDeclarativeFlickablePrivate::flick(AxisData &data, qreal minExtent, qreal
     Q_Q(QDeclarativeFlickable);
     qreal maxDistance = -1;
     data.fixingUp = false;
-    bool overShoot = boundsBehavior == QDeclarativeFlickable::DragAndOvershootBounds;
     // -ve velocity means list is moving up
     if (velocity > 0) {
-        if (data.move.value() < minExtent)
-            maxDistance = qAbs(minExtent - data.move.value() + (overShoot?overShootDistance(velocity,vSize):0));
+        maxDistance = qAbs(minExtent - data.move.value());
         data.flickTarget = minExtent;
     } else {
-        if (data.move.value() > maxExtent)
-            maxDistance = qAbs(maxExtent - data.move.value()) + (overShoot?overShootDistance(velocity,vSize):0);
+        maxDistance = qAbs(maxExtent - data.move.value());
         data.flickTarget = maxExtent;
     }
     if (maxDistance > 0) {
@@ -240,7 +289,10 @@ void QDeclarativeFlickablePrivate::flick(AxisData &data, qreal minExtent, qreal
                 v = maxVelocity;
         }
         timeline.reset(data.move);
-        timeline.accel(data.move, v, deceleration, maxDistance);
+        if (boundsBehavior == QDeclarativeFlickable::DragAndOvershootBounds)
+            timeline.accel(data.move, v, deceleration);
+        else
+            timeline.accel(data.move, v, deceleration, maxDistance);
         timeline.callback(QDeclarativeTimeLineCallback(&data.move, fixupCallback, this));
         if (!flickingHorizontally && q->xflick()) {
             flickingHorizontally = true;
@@ -327,6 +379,7 @@ void QDeclarativeFlickablePrivate::fixup(AxisData &data, qreal minExtent, qreal
             }
         }
     }
+    data.inOvershoot = false;
     fixupMode = Normal;
     vTime = timeline.time();
 }
@@ -706,16 +759,13 @@ void QDeclarativeFlickablePrivate::handleMousePressEvent(QGraphicsSceneMouseEven
     q->setKeepMouseGrab(stealMouse);
     pressed = true;
     timeline.clear();
-    hData.velocity = 0;
-    vData.velocity = 0;
-    hData.dragStartOffset = 0;
-    vData.dragStartOffset = 0;
+    hData.reset();
+    vData.reset();
     hData.dragMinBound = q->minXExtent();
     vData.dragMinBound = q->minYExtent();
     hData.dragMaxBound = q->maxXExtent();
     vData.dragMaxBound = q->maxYExtent();
-    hData.fixingUp = false;
-    vData.fixingUp = false;
+    fixupMode = Normal;
     lastPos = QPoint();
     QDeclarativeItemPrivate::start(lastPosTime);
     pressPos = event->pos();
@@ -807,33 +857,33 @@ void QDeclarativeFlickablePrivate::handleMouseMoveEvent(QGraphicsSceneMouseEvent
     if (stealMouse)
         q->setKeepMouseGrab(true);
 
-    if (!lastPos.isNull()) {
-        qreal elapsed = qreal(QDeclarativeItemPrivate::restart(lastPosTime)) / 1000.;
-        if (elapsed <= 0)
-            elapsed = 1;
-        if (q->yflick()) {
-            qreal diff = event->pos().y() - lastPos.y();
-            // average to reduce the effect of spurious moves
-            vData.velocity += diff / elapsed;
-            vData.velocity /= 2;
-        }
-
-        if (q->xflick()) {
-            qreal diff = event->pos().x() - lastPos.x();
-            // average to reduce the effect of spurious moves
-            hData.velocity += diff / elapsed;
-            hData.velocity /= 2;
-        }
+    if (rejectY) {
+        vData.velocityBuffer.clear();
+        vData.velocity = 0;
+    }
+    if (rejectX) {
+        hData.velocityBuffer.clear();
+        hData.velocity = 0;
     }
-
-    if (rejectY) vData.velocity = 0;
-    if (rejectX) hData.velocity = 0;
 
     if (hMoved || vMoved) {
         q->movementStarting();
         q->viewportMoved();
     }
 
+    if (!lastPos.isNull()) {
+        qreal elapsed = qreal(QDeclarativeItemPrivate::elapsed(lastPosTime)) / 1000.;
+        if (elapsed <= 0)
+            return;
+        QDeclarativeItemPrivate::restart(lastPosTime);
+        qreal dy = event->pos().y()-lastPos.y();
+        if (q->yflick() && !rejectY)
+            vData.addVelocitySample(dy/elapsed, maxVelocity);
+        qreal dx = event->pos().x()-lastPos.x();
+        if (q->xflick() && !rejectX)
+            hData.addVelocitySample(dx/elapsed, maxVelocity);
+    }
+
     lastPos = event->pos();
 }
 
@@ -846,25 +896,33 @@ void QDeclarativeFlickablePrivate::handleMouseReleaseEvent(QGraphicsSceneMouseEv
     if (!lastPosTime.isValid())
         return;
 
-    if (QDeclarativeItemPrivate::elapsed(lastPosTime) > 100) {
-        // if we drag then pause before release we should not cause a flick.
+    // if we drag then pause before release we should not cause a flick.
+    if (QDeclarativeItemPrivate::elapsed(lastPosTime) < 100) {
+        vData.updateVelocity();
+        hData.updateVelocity();
+    } else {
         hData.velocity = 0.0;
         vData.velocity = 0.0;
     }
 
     vTime = timeline.time();
-    if (qAbs(vData.velocity) > MinimumFlickVelocity && qAbs(event->pos().y() - pressPos.y()) > FlickThreshold)
-        flickY(vData.velocity);
+
+    qreal velocity = vData.velocity;
+    if (vData.atBeginning || vData.atEnd)
+        velocity /= 2;
+    if (qAbs(velocity) > MinimumFlickVelocity && qAbs(event->pos().y() - pressPos.y()) > FlickThreshold)
+        flickY(velocity);
     else
         fixupY();
 
-    if (qAbs(hData.velocity) > MinimumFlickVelocity && qAbs(event->pos().x() - pressPos.x()) > FlickThreshold)
-        flickX(hData.velocity);
+    velocity = hData.velocity;
+    if (hData.atBeginning || hData.atEnd)
+        velocity /= 2;
+    if (qAbs(velocity) > MinimumFlickVelocity && qAbs(event->pos().x() - pressPos.x()) > FlickThreshold)
+        flickX(velocity);
     else
         fixupX();
 
-    lastPosTime.invalidate();
-
     if (!timeline.isActive())
         q->movementEnding();
 }
@@ -911,29 +969,41 @@ void QDeclarativeFlickable::wheelEvent(QGraphicsSceneWheelEvent *event)
     if (!d->interactive) {
         QDeclarativeItem::wheelEvent(event);
     } else if (yflick() && event->orientation() == Qt::Vertical) {
-        if (event->delta() > 0)
-            d->vData.velocity = qMax(event->delta() - d->vData.smoothVelocity.value(), qreal(250.0));
-        else
-            d->vData.velocity = qMin(event->delta() - d->vData.smoothVelocity.value(), qreal(-250.0));
-        d->flickingVertically = false;
-        d->flickY(d->vData.velocity);
-        if (d->flickingVertically) {
-            d->vMoved = true;
-            movementStarting();
+        bool valid = false;
+        if (event->delta() > 0 && contentY() > -minYExtent()) {
+            d->vData.velocity = qMax(event->delta()*2 - d->vData.smoothVelocity.value(), qreal(d->maxVelocity/4));
+            valid = true;
+        } else if (event->delta() < 0 && contentY() < -maxYExtent()) {
+            d->vData.velocity = qMin(event->delta()*2 - d->vData.smoothVelocity.value(), qreal(-d->maxVelocity/4));
+            valid = true;
+        }
+        if (valid) {
+            d->flickingVertically = false;
+            d->flickY(d->vData.velocity);
+            if (d->flickingVertically) {
+                d->vMoved = true;
+                movementStarting();
+            }
+            event->accept();
         }
-        event->accept();
     } else if (xflick() && event->orientation() == Qt::Horizontal) {
-        if (event->delta() > 0)
-            d->hData.velocity = qMax(event->delta() - d->hData.smoothVelocity.value(), qreal(250.0));
-        else
-            d->hData.velocity = qMin(event->delta() - d->hData.smoothVelocity.value(), qreal(-250.0));
-        d->flickingHorizontally = false;
-        d->flickX(d->hData.velocity);
-        if (d->flickingHorizontally) {
-            d->hMoved = true;
-            movementStarting();
+        bool valid = false;
+        if (event->delta() > 0 && contentX() > -minXExtent()) {
+            d->hData.velocity = qMax(event->delta()*2 - d->hData.smoothVelocity.value(), qreal(d->maxVelocity/4));
+            valid = true;
+        } else if (event->delta() < 0 && contentX() < -maxXExtent()) {
+            d->hData.velocity = qMin(event->delta()*2 - d->hData.smoothVelocity.value(), qreal(-d->maxVelocity/4));
+            valid = true;
+        }
+        if (valid) {
+            d->flickingHorizontally = false;
+            d->flickX(d->hData.velocity);
+            if (d->flickingHorizontally) {
+                d->hMoved = true;
+                movementStarting();
+            }
+            event->accept();
         }
-        event->accept();
     } else {
         QDeclarativeItem::wheelEvent(event);
     }
@@ -1071,6 +1141,27 @@ void QDeclarativeFlickable::viewportMoved()
         }
     }
 
+    if (!d->vData.inOvershoot && !d->vData.fixingUp && d->flickingVertically
+            && (d->vData.move.value() > minYExtent() || d->vData.move.value() < maxYExtent())
+            && qAbs(d->vData.smoothVelocity.value()) > 100) {
+        // Increase deceleration if we've passed a bound
+        d->vData.inOvershoot = true;
+        qreal maxDistance = d->overShootDistance(height());
+        d->timeline.reset(d->vData.move);
+        d->timeline.accel(d->vData.move, -d->vData.smoothVelocity.value(), d->deceleration*QML_FLICK_OVERSHOOTFRICTION, maxDistance);
+        d->timeline.callback(QDeclarativeTimeLineCallback(&d->vData.move, d->fixupY_callback, d));
+    }
+    if (!d->hData.inOvershoot && !d->hData.fixingUp && d->flickingHorizontally
+            && (d->hData.move.value() > minXExtent() || d->hData.move.value() < maxXExtent())
+            && qAbs(d->hData.smoothVelocity.value()) > 100) {
+        // Increase deceleration if we've passed a bound
+        d->hData.inOvershoot = true;
+        qreal maxDistance = d->overShootDistance(width());
+        d->timeline.reset(d->hData.move);
+        d->timeline.accel(d->hData.move, -d->hData.smoothVelocity.value(), d->deceleration*QML_FLICK_OVERSHOOTFRICTION, maxDistance);
+        d->timeline.callback(QDeclarativeTimeLineCallback(&d->hData.move, d->fixupX_callback, d));
+    }
+
     d->lastFlickablePosition = QPointF(d->hData.move.value(), d->vData.move.value());
 
     d->vTime = d->timeline.time();
@@ -1503,7 +1594,7 @@ bool QDeclarativeFlickable::sceneEventFilter(QGraphicsItem *i, QEvent *e)
     \qmlproperty real Flickable::maximumFlickVelocity
     This property holds the maximum velocity that the user can flick the view in pixels/second.
 
-    The default is 2000 pixels/s
+    The default value is platform dependent.
 */
 qreal QDeclarativeFlickable::maximumFlickVelocity() const
 {
@@ -1524,7 +1615,7 @@ void QDeclarativeFlickable::setMaximumFlickVelocity(qreal v)
     \qmlproperty real Flickable::flickDeceleration
     This property holds the rate at which a flick will decelerate.
 
-    The default is 500.
+    The default value is platform dependent.
 */
 qreal QDeclarativeFlickable::flickDeceleration() const
 {