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

* 'master' of scm.dev.nokia.troll.no:qt/qt-multimedia-staging:
  Removed obsolete Maemo 5 code
  QScroller: nicer Overshoot bounce back animation.
  Use XRandR to get the real DPI values for the screen.
  Resolve XRRSizes() from libxrandr for QScroller's DPI calculation.
  Fix drag velocity smoothing in QScroller.
  Make QScroller examples Qt-namespace safe.

4 files changed, 46 insertions, 47 deletions

diff --git a/src/gui/kernel/qapplication_x11.cpp b/src/gui/kernel/qapplication_x11.cpp
index ff98229..58ccda2 100644
--- a/src/gui/kernel/qapplication_x11.cpp
+++ b/src/gui/kernel/qapplication_x11.cpp
@@ -2015,12 +2015,15 @@ void qt_init(QApplicationPrivate *priv, int,
                     (PtrXRRRootToScreen) xrandrLib.resolve("XRRRootToScreen");
                 X11->ptrXRRQueryExtension =
                     (PtrXRRQueryExtension) xrandrLib.resolve("XRRQueryExtension");
+                X11->ptrXRRSizes =
+                    (PtrXRRSizes) xrandrLib.resolve("XRRSizes");
             }
 #  else
             X11->ptrXRRSelectInput = XRRSelectInput;
             X11->ptrXRRUpdateConfiguration = XRRUpdateConfiguration;
             X11->ptrXRRRootToScreen = XRRRootToScreen;
             X11->ptrXRRQueryExtension = XRRQueryExtension;
+            X11->ptrXRRSizes = XRRSizes;
 #  endif
 
             if (X11->ptrXRRQueryExtension
diff --git a/src/gui/kernel/qt_x11_p.h b/src/gui/kernel/qt_x11_p.h
index 56c8094..d97264c 100644
--- a/src/gui/kernel/qt_x11_p.h
+++ b/src/gui/kernel/qt_x11_p.h
@@ -226,6 +226,7 @@ typedef void (*PtrXRRSelectInput)(Display *, Window, int);
 typedef int (*PtrXRRUpdateConfiguration)(XEvent *);
 typedef int (*PtrXRRRootToScreen)(Display *, Window);
 typedef Bool (*PtrXRRQueryExtension)(Display *, int *, int *);
+typedef XRRScreenSize *(*PtrXRRSizes)(Display *, int, int *);
 #endif // QT_NO_XRANDR
 
 #ifndef QT_NO_XINPUT
@@ -710,6 +711,7 @@ struct QX11Data
     PtrXRRUpdateConfiguration ptrXRRUpdateConfiguration;
     PtrXRRRootToScreen ptrXRRRootToScreen;
     PtrXRRQueryExtension ptrXRRQueryExtension;
+    PtrXRRSizes ptrXRRSizes;
 #endif // QT_NO_XRANDR
 };
 
diff --git a/src/gui/util/qscroller.cpp b/src/gui/util/qscroller.cpp
index b7b5903..2ca4a6e 100644
--- a/src/gui/util/qscroller.cpp
+++ b/src/gui/util/qscroller.cpp
@@ -64,6 +64,10 @@
 
 #include <QtDebug>
 
+#if defined(Q_WS_X11)
+#  include "private/qt_x11_p.h"
+#endif
+
 
 QT_BEGIN_NAMESPACE
 
@@ -986,38 +990,46 @@ bool QScroller::handleInput(Input input, const QPointF &position, qint64 timesta
     return false;
 }
 
-#ifdef Q_WS_MAEMO_5
+#if !defined(Q_WS_MAC)
+// the Mac version is implemented in qscroller_mac.mm
 
 QPointF QScrollerPrivate::realDpi(int screen)
 {
+#  ifdef Q_WS_MAEMO_5
     Q_UNUSED(screen);
+
     // The DPI value is hardcoded to 96 on Maemo5:
     // https://projects.maemo.org/bugzilla/show_bug.cgi?id=152525
     // This value (260) is only correct for the N900 though, but
     // there's no way to get the real DPI at run time.
     return QPointF(260, 260);
-}
-
-#elif defined(Q_WS_MAC)
 
-// implemented in qscroller_mac.mm
-
-#else
+#  elif defined(Q_WS_X11) && !defined(QT_NO_XRANDR)
+    if (X11->use_xrandr && X11->ptrXRRSizes) {
+        int nsizes = 0;
+        XRRScreenSize *sizes = X11->ptrXRRSizes(X11->display, screen == -1 ? X11->defaultScreen : screen, &nsizes);
+        if (nsizes > 0 && sizes && sizes->width && sizes->height && sizes->mwidth && sizes->mheight) {
+            qScrollerDebug() << "XRandR DPI:" << QPointF(qreal(25.4) * qreal(sizes->width) / qreal(sizes->mwidth),
+                                                         qreal(25.4) * qreal(sizes->height) / qreal(sizes->mheight));
+            return QPointF(qreal(25.4) * qreal(sizes->width) / qreal(sizes->mwidth),
+                           qreal(25.4) * qreal(sizes->height) / qreal(sizes->mheight));
+        }
+    }
+#  endif
 
-QPointF QScrollerPrivate::realDpi(int screen)
-{
     QWidget *w = QApplication::desktop()->screen(screen);
     return QPointF(w->physicalDpiX(), w->physicalDpiY());
 }
 
-#endif
+#endif // !Q_WS_MAC
+
 
 /*! \internal
     Returns the resolution of the used screen.
 */
 QPointF QScrollerPrivate::dpi() const
 {
-    return pixelPerMeter / qreal(39.3700787);
+    return pixelPerMeter * qreal(0.0254);
 }
 
 /*! \internal
@@ -1028,7 +1040,7 @@ QPointF QScrollerPrivate::dpi() const
 */
 void QScrollerPrivate::setDpi(const QPointF &dpi)
 {
-    pixelPerMeter = dpi * qreal(39.3700787);
+    pixelPerMeter = dpi / qreal(0.0254);
 }
 
 /*! \internal
@@ -1046,6 +1058,9 @@ void QScrollerPrivate::setDpiFromWidget(QWidget *widget)
 */
 void QScrollerPrivate::updateVelocity(const QPointF &deltaPixelRaw, qint64 deltaTime)
 {
+    if (deltaTime <= 0)
+        return;
+
     Q_Q(QScroller);
     QPointF ppm = q->pixelPerMeter();
     const QScrollerPropertiesPrivate *sp = properties.d.data();
@@ -1057,14 +1072,12 @@ void QScrollerPrivate::updateVelocity(const QPointF &deltaPixelRaw, qint64 delta
     if (((deltaPixelRaw / qreal(deltaTime)).manhattanLength() / ((ppm.x() + ppm.y()) / 2) * 1000) > qreal(2.5))
         deltaPixel = deltaPixelRaw * qreal(2.5) * ppm / 1000 / (deltaPixelRaw / qreal(deltaTime)).manhattanLength();
 
-    qreal inversSmoothingFactor = ((qreal(1) - sp->dragVelocitySmoothingFactor) * qreal(deltaTime) / qreal(1000));
     QPointF newv = -deltaPixel / qreal(deltaTime) * qreal(1000) / ppm;
-    newv = newv * (qreal(1) - inversSmoothingFactor) + releaseVelocity * inversSmoothingFactor;
+    if (releaseVelocity != QPointF(0, 0))
+        newv = newv * sp->dragVelocitySmoothingFactor + releaseVelocity * (qreal(1) - sp->dragVelocitySmoothingFactor);
 
-    if (deltaPixel.x())
-        releaseVelocity.setX(qBound(-sp->maximumVelocity, newv.x(), sp->maximumVelocity));
-    if (deltaPixel.y())
-        releaseVelocity.setY(qBound(-sp->maximumVelocity, newv.y(), sp->maximumVelocity));
+    releaseVelocity.setX(qBound(-sp->maximumVelocity, newv.x(), sp->maximumVelocity));
+    releaseVelocity.setY(qBound(-sp->maximumVelocity, newv.y(), sp->maximumVelocity));
 
     qScrollerDebug() << "  --> new velocity:" << releaseVelocity;
 }
@@ -1354,9 +1367,8 @@ void QScrollerPrivate::createScrollingSegments(qreal v, qreal startPos, qreal pp
             qreal oDistance = viewSize * sp->overshootScrollDistanceFactor * endV / sp->maximumVelocity;
             qreal oDeltaTime = sp->overshootScrollTime;
 
-            pushSegment(ScrollTypeOvershoot, oDeltaTime * 0.5, stopPos, stopPos + oDistance, sp->scrollingCurve.type(), orientation);
-            pushSegment(ScrollTypeOvershoot, oDeltaTime * 0.3, stopPos + oDistance, stopPos + oDistance * 0.3, QEasingCurve::InQuad, orientation);
-            pushSegment(ScrollTypeOvershoot, oDeltaTime * 0.2, stopPos + oDistance * 0.3, stopPos, QEasingCurve::OutQuad, orientation);
+            pushSegment(ScrollTypeOvershoot, oDeltaTime * 0.3, stopPos, stopPos + oDistance, sp->scrollingCurve.type(), orientation);
+            pushSegment(ScrollTypeOvershoot, oDeltaTime * 0.7, stopPos + oDistance, stopPos, sp->scrollingCurve.type(), orientation);
         }
         return;
     }
@@ -1569,6 +1581,9 @@ bool QScrollerPrivate::releaseWhileDragging(const QPointF &position, qint64 time
     Q_Q(QScroller);
     const QScrollerPropertiesPrivate *sp = properties.d.data();
 
+    // handleDrag updates lastPosition, lastTimestamp and velocity
+    handleDrag(position, timestamp);
+
     // check if we moved at all - this can happen if you stop a running
     // scroller with a press and release shortly afterwards
     QPointF deltaPixel = position - pressPosition;
diff --git a/src/gui/util/qscrollerproperties.cpp b/src/gui/util/qscrollerproperties.cpp
index d21f131..2e52959 100644
--- a/src/gui/util/qscrollerproperties.cpp
+++ b/src/gui/util/qscrollerproperties.cpp
@@ -58,31 +58,9 @@ QScrollerPropertiesPrivate *QScrollerPropertiesPrivate::defaults()
 {
     if (!systemDefaults) {
         QScrollerPropertiesPrivate spp;
-#ifdef Q_WS_MAEMO_5
-        spp.mousePressEventDelay = qreal(0);
-        spp.dragStartDistance = qreal(2.5 / 1000);
-        spp.dragVelocitySmoothingFactor = qreal(0.15);
-        spp.axisLockThreshold = qreal(0);
-        spp.scrollingCurve.setType(QEasingCurve::OutQuad);
-        spp.decelerationFactor = 1.0;
-        spp.minimumVelocity = qreal(0.0195);
-        spp.maximumVelocity = qreal(6.84);
-        spp.maximumClickThroughVelocity = qreal(0.0684);
-        spp.acceleratingFlickMaximumTime = qreal(0.125);
-        spp.acceleratingFlickSpeedupFactor = qreal(3.0);
-        spp.snapPositionRatio = qreal(0.25);
-        spp.snapTime = qreal(1);
-        spp.overshootDragResistanceFactor = qreal(1);
-        spp.overshootDragDistanceFactor = qreal(0.3);
-        spp.overshootScrollDistanceFactor = qreal(0.3);
-        spp.overshootScrollTime = qreal(0.5);
-        spp.hOvershootPolicy = QScrollerProperties::OvershootWhenScrollable;
-        spp.vOvershootPolicy = QScrollerProperties::OvershootWhenScrollable;
-        spp.frameRate = QScrollerProperties::Fps30;
-#else
         spp.mousePressEventDelay = qreal(0.25);
         spp.dragStartDistance = qreal(5.0 / 1000);
-        spp.dragVelocitySmoothingFactor = qreal(0.02);
+        spp.dragVelocitySmoothingFactor = qreal(0.8);
         spp.axisLockThreshold = qreal(0);
         spp.scrollingCurve.setType(QEasingCurve::OutQuad);
         spp.decelerationFactor = qreal(0.125);
@@ -104,7 +82,7 @@ QScrollerPropertiesPrivate *QScrollerPropertiesPrivate::defaults()
         spp.hOvershootPolicy = QScrollerProperties::OvershootWhenScrollable;
         spp.vOvershootPolicy = QScrollerProperties::OvershootWhenScrollable;
         spp.frameRate = QScrollerProperties::Standard;
-#endif
+
         systemDefaults = new QScrollerPropertiesPrivate(spp);
     }
     return new QScrollerPropertiesPrivate(userDefaults ? *userDefaults : *systemDefaults);
@@ -342,8 +320,9 @@ void QScrollerProperties::setScrollMetric(ScrollMetric metric, const QVariant &v
     moved before the flick gesture is triggered in \c m.
 
     \value DragVelocitySmoothingFactor A value that describes how much new drag velocities are
-    included in the final scrolling velocity. This value should be in the range between \c 0 and \c
-    1. Low values meaning that the last dragging velocity is not very important.
+    included in the final scrolling velocity.  This value should be in the range between \c 0 and
+    \c 1.  The lower the value, the more smoothing will be applied to the dragging velocity.  The
+    default value is \c 0.8.
 
     \value AxisLockThreshold If greater than zero a scroll movement will be restricted to one axis
     only if the movement is inside an angle about the axis. The threshold must be in the range \c 0