chore: 增加滚动区域滚轮滚动到顶部或底部的回弹效果

增加滚动区域滚轮滚动到顶部或底部的回弹效果

Log:

include/DWidget/DBounceAnimation

@@ -0,0 +1 @@
+#include "dbounceanimation.h"

include/widgets/dbounceanimation.h

@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+#ifndef DBOUNCEANIMATION_H
+#define DBOUNCEANIMATION_H
+
+#include <DObject>
+#include <QObject>
+
+class QPropertyAnimation;
+class QAbstractScrollArea;
+class DBounceAnimationPrivate;
+class DBounceAnimation : public QObject, public DTK_CORE_NAMESPACE::DObject
+{
+    Q_OBJECT
+public:
+    explicit DBounceAnimation(QObject *parent = nullptr);
+
+    void setAnimationTarget(QAbstractScrollArea *w);
+
+protected:
+    bool eventFilter(QObject *o, QEvent *e) override;
+    void bounceBack(Qt::Orientation orientation);
+
+private:
+    D_DECLARE_PRIVATE(DBounceAnimation)
+
+};
+
+#endif // DBOUNCEANIMATION_H

src/widgets/dbounceanimation.cpp

@@ -0,0 +1,101 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+#include "private/dbounceanimation_p.h"
+#include <QPropertyAnimation>
+#include <QEvent>
+#include <QDebug>
+#include <QAbstractScrollArea>
+#include <QScrollBar>
+#include <QWheelEvent>
+#include <QTimer>
+
+DBounceAnimationPrivate::DBounceAnimationPrivate(DBounceAnimation *qq)
+    : DObjectPrivate (qq)
+    , m_animation(nullptr)
+    , m_animationTarget(nullptr)
+    , m_deltaSum(0)
+{
+}
+
+DBounceAnimation::DBounceAnimation(QObject *parent)
+    : QObject(parent)
+    , DObject(*new DBounceAnimationPrivate(this))
+{
+}
+
+void DBounceAnimation::setAnimationTarget(QAbstractScrollArea *w)
+{
+    D_D(DBounceAnimation);
+    if (!w)
+        return;
+
+    w->installEventFilter(this);
+
+    if (d->m_animationTarget == w)
+        return;
+
+    d->m_animationTarget = w;
+
+}
+
+bool DBounceAnimation::eventFilter(QObject *o, QEvent *e)
+{
+    D_D(DBounceAnimation);
+    if (e->type() == QEvent::Wheel) {
+        if (auto absscroll = dynamic_cast<QAbstractScrollArea *>(o)) {
+            if (auto wheelEvent = dynamic_cast<QWheelEvent *>(e)) {
+                if (absscroll->verticalScrollBar()->value() <= 0 || absscroll->verticalScrollBar()->value() >= absscroll->verticalScrollBar()->maximum()) {
+                    d->m_deltaSum += wheelEvent->delta();
+                    bounceBack(wheelEvent->angleDelta().x() == 0 ? Qt::Vertical : Qt::Horizontal);
+                }
+            }
+        }
+    }
+
+    return false;
+}
+
+void DBounceAnimation::bounceBack(Qt::Orientation orientation)
+{
+    D_D(DBounceAnimation);
+    if (d->m_animation)
+        return;
+
+    if (orientation & Qt::Vertical && d->m_animationTarget->verticalScrollBar()->maximum() == d->m_animationTarget->verticalScrollBar()->minimum())
+        return;
+
+    if (orientation & Qt::Horizontal && d->m_animationTarget->horizontalScrollBar()->maximum() == d->m_animationTarget->horizontalScrollBar()->minimum())
+        return;
+
+    d->m_animation = new QPropertyAnimation(this);
+    d->m_animation->setTargetObject(d->m_animationTarget->viewport());
+    d->m_animation->setPropertyName("pos");
+    d->m_animation->setDuration(100);
+    d->m_animation->setEasingCurve(QEasingCurve::InQuart);
+    d->m_animation->setStartValue(QPoint(d->m_animationTarget->viewport()->x(), d->m_animationTarget->viewport()->y()));
+
+    QTimer::singleShot(100, this, [this, d, orientation]() {
+
+        orientation & Qt::Vertical
+                ? d->m_animation->setEndValue(
+                      QPoint(d->m_animationTarget->viewport()->x(), d->m_animationTarget->viewport()->y() + d->m_deltaSum / 16))
+                : d->m_animation->setEndValue(
+                      QPoint(d->m_animationTarget->viewport()->x() + d->m_deltaSum / 16, d->m_animationTarget->viewport()->y()));
+
+        d->m_animation->start();
+
+        connect(d->m_animation, &QPropertyAnimation::finished, this, [d]() {
+            if (d->m_animation->direction() == QPropertyAnimation::Backward) {
+                delete d->m_animation;
+                d->m_animation = nullptr;
+                return;
+            }
+
+            d->m_animation->setDirection(QPropertyAnimation::Direction::Backward);
+            d->m_animation->setDuration(1000);
+            d->m_animation->start(QPropertyAnimation::DeleteWhenStopped);
+            d->m_deltaSum = 0;
+        });
+    });
+}

src/widgets/dlistview.cpp

@@ -13,6 +13,8 @@
 #include "dstyleditemdelegate.h"
 #include "dstyle.h"
 
+#include <DBounceAnimation>
+
 DWIDGET_BEGIN_NAMESPACE
 
 DVariantListModel::DVariantListModel(QObject *parent) :
@@ -196,6 +198,8 @@ DListView::DListView(QWidget *parent) :
     DObject(*new DListViewPrivate(this))
 {
     d_func()->init();
+    auto animation = new DBounceAnimation(this);
+    animation->setAnimationTarget(this);
 }
 
 /*!

src/widgets/private/dbounceanimation_p.h

@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+#ifndef DBOUNCEANIMATION_P_H
+#define DBOUNCEANIMATION_P_H
+
+#include "dbounceanimation.h"
+#include <DObjectPrivate>
+
+class DBounceAnimationPrivate : public DTK_CORE_NAMESPACE::DObjectPrivate
+{
+public:
+    DBounceAnimationPrivate(DBounceAnimation *qq);
+
+    QPropertyAnimation *m_animation;
+    QAbstractScrollArea *m_animationTarget;
+    int m_deltaSum;
+
+private:
+    D_DECLARE_PUBLIC(DBounceAnimation)
+};
+
+#endif // DBOUNCEANIMATION_P_H