chore: 增加滚动区域滚轮滚动到顶部或底部的回弹效果

[Whale107]

增加滚动区域滚轮滚动到顶部或底部的回弹效果

Log:

[deepin-ci-robot]

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This pull-request has been approved by: Whale107

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[deepin-bot[bot]]

Doc Check bot :yellow_circle: some documents missing! File	Line	Symbol
include/widgets/dbounceanimation.h	17	DBounceAnimation::DBounceAnimation
include/widgets/dbounceanimation.h	19	void DBounceAnimation::setAnimationTarget
include/widgets/dbounceanimation.h	20	void DBounceAnimation::setAniMationEnable
include/widgets/dbounceanimation.h	13	DBounceAnimation
src/widgets/private/dbounceanimation_p.h	15	QPropertyAnimation* DBounceAnimationPrivate::m_animation
src/widgets/private/dbounceanimation_p.h	16	QAbstractScrollArea* DBounceAnimationPrivate::m_animationTarget
src/widgets/private/dbounceanimation_p.h	17	int DBounceAnimationPrivate::m_deltaSum
src/widgets/private/dbounceanimation_p.h	13	DBounceAnimationPrivate::DBounceAnimationPrivate
src/widgets/private/dbounceanimation_p.h	10	DBounceAnimationPrivate

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在DBounceAnimation类的构造函数中，没有检查parent参数是否为nullptr，可能会导致未定义行为。
• setAnimationTarget方法中，如果m_animationTarget已经设置为w，则没有必要再次设置。
• eventFilter方法中，处理QWheelEvent的逻辑可能不正确，因为wheelEvent的参数类型是QWheelEvent *，而不是QEvent *。
• bounceBack方法中，使用d->m_animationTarget->viewport()->x()和y()获取滚动视图的坐标，但没有考虑到滚动视图可能没有viewport()对象的情况。
• bounceBack方法中，使用d->m_animationTarget->horizontalScrollBar()->maximum()和minimum()获取水平滚动条的最大和最小值，但没有考虑到滚动条可能不存在的情况。
• bounceBack方法中，使用d->m_animationTarget->verticalScrollBar()->maximum()和minimum()获取垂直滚动条的最大和最小值，但没有考虑到滚动条可能不存在的情况。
• bounceBack方法中，当m_animation的direction为Backward时，没有正确地设置m_animation的direction为Forward，而是直接修改了m_animation的setDirection方法。
• bounceBack方法中，没有正确处理m_animation的finished信号，可能导致资源泄漏。
• bounceBack方法中的QTimer::singleShot回调函数中使用了this指针，但没有考虑到this指针可能为nullptr的情况。
• DBounceAnimationPrivate类的构造函数中，没有正确地初始化m_animation和m_animationTarget成员变量。
• DBounceAnimationPrivate类中的m_deltaSum成员变量应该使用int类型，而不是QPoint类型。

是否建议立即修改: 是