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limit the rate of wheel events to 50 msecs.

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this makes the scroll widget not getting mad with a touchpad scroll, that spits a ton of subsequent wheel events

svn path=/trunk/KDE/kdelibs/; revision=1207045
This commit is contained in:
Marco Martin 2010-12-16 17:38:41 +00:00
parent 9269fcb7a3
commit e2f5428044
1 changed files with 8 additions and 1 deletions
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9
widgets/scrollwidget.cpp
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@ -133,6 +133,9 @@ public:
adjustScrollbarsTimer->setSingleShot(true);
QObject::connect(adjustScrollbarsTimer, SIGNAL(timeout()), q, SLOT(adjustScrollbars()));
wheelTimer = new QTimer(q);
wheelTimer->setSingleShot(true);
verticalScrollBarPolicy = Qt::ScrollBarAsNeeded;
verticalScrollBar = new Plasma::ScrollBar(q);
verticalScrollBar->setFocusPolicy(Qt::NoFocus);
@ -791,8 +794,10 @@ public:
void handleWheelEvent(QGraphicsSceneWheelEvent *event)
{
if (!widget.data())
//only scroll when the animation is done, this avoids to receive too many events and getting mad when they arrive from a touchpad
if (!widget.data() || wheelTimer->isActive()) {
return;
}
QPointF start = q->scrollPosition();
QPointF end = start;
@ -835,6 +840,7 @@ public:
directMoveAnimation->setEndValue(end);
directMoveAnimation->setDuration(200);
directMoveAnimation->start();
wheelTimer->start(50);
}
qreal minXExtent() const
@ -1059,6 +1065,7 @@ public:
QPointF dragHandleClicked;
bool dragging;
QTimer *adjustScrollbarsTimer;
QTimer *wheelTimer;
QPointF pressPos;
QPointF pressScrollPos;