diff options
author | J-P Nurmi <jpnurmi@digia.com> | 2012-10-23 14:39:26 +0200 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2012-10-30 17:51:21 +0100 |
commit | 85a8df184b3aaa7f3a5a35895aa1caa3d4c39f42 (patch) | |
tree | f6fc34d0a08ab464dd93a88a4a67911444bcb42f /src/widgets/styles/qstyleanimation.cpp | |
parent | 788e1b2ffa5541b86f62bf468540bb8b5872c033 (diff) |
Add QNumberStyleAnimation for fading out scroll bars on Mac
Change-Id: I6a85ed069a418d62078af6490a3d3186d5599a95
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Diffstat (limited to 'src/widgets/styles/qstyleanimation.cpp')
-rw-r--r-- | src/widgets/styles/qstyleanimation.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/widgets/styles/qstyleanimation.cpp b/src/widgets/styles/qstyleanimation.cpp index d81532f8a5..0138996e33 100644 --- a/src/widgets/styles/qstyleanimation.cpp +++ b/src/widgets/styles/qstyleanimation.cpp @@ -163,4 +163,49 @@ bool QProgressStyleAnimation::isUpdateNeeded() const return false; } +QNumberStyleAnimation::QNumberStyleAnimation(QObject *target) : + QStyleAnimation(target), _start(0.0), _end(1.0), _prev(0.0) +{ + setDuration(250); +} + +qreal QNumberStyleAnimation::startValue() const +{ + return _start; +} + +void QNumberStyleAnimation::setStartValue(qreal value) +{ + _start = value; +} + +qreal QNumberStyleAnimation::endValue() const +{ + return _end; +} + +void QNumberStyleAnimation::setEndValue(qreal value) +{ + _end = value; +} + +qreal QNumberStyleAnimation::currentValue() const +{ + qreal step = qreal(currentTime() - delay()) / (duration() - delay()); + return _start + qMax(qreal(0), step) * (_end - _start); +} + +bool QNumberStyleAnimation::isUpdateNeeded() const +{ + if (QStyleAnimation::isUpdateNeeded()) { + qreal current = currentValue(); + if (!qFuzzyCompare(_prev, current)) + { + _prev = current; + return true; + } + } + return false; +} + QT_END_NAMESPACE |