fix(touch): enable manual touch scrolling for network plugin in Wayland

Under Wayland, Qt's gesture manager fails to find correct target widgets for touch events
inside QTreeView and QScrollArea, leading to unresponsive touch scrolling.

Direct interception of Touch events on the viewport, translation into scrollbar value updates,
and generation of precise mouse button events for item interaction without drag.

Log: Fix touch scrolling for NetView
Pms: BUG-351259

Author: yixinshark

common-plugin/networkdialog/networkpanel.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2018 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2018 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
@@ -111,6 +111,7 @@ void NetworkPanel::initUi()
     m_netListView->setMouseTracking(true);
     m_netListView->setItemMargins(QMargins(10, 0, 10, 0));
     m_netListView->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+    m_netListView->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
     m_netListView->setItemRadius(0);
 
     NetworkDelegate *delegate = new NetworkDelegate(m_netListView);
@@ -163,11 +164,8 @@ void NetworkPanel::initUi()
     setControlBackground();
 
     // 支持在触摸屏上滚动
-    QScroller::grabGesture(m_netListView->viewport(), QScroller::LeftMouseButtonGesture);
-    QScroller *scroller = QScroller::scroller(m_netListView->window());
-    QScrollerProperties sp;
-    sp.setScrollMetric(QScrollerProperties::VerticalOvershootPolicy, QScrollerProperties::OvershootAlwaysOff);
-    scroller->setScrollerProperties(sp);
+    m_netListView->setAttribute(Qt::WA_AcceptTouchEvents, true);
+    m_netListView->viewport()->setAttribute(Qt::WA_AcceptTouchEvents, true);
 }
 
 void NetworkPanel::initConnection()

net-view/window/netview.cpp

@@ -15,6 +15,7 @@
 #include <QEvent>
 #include <QHoverEvent>
 #include <QScrollBar>
+#include <QCoreApplication>
 #include <QScroller>
 #include <QScrollerProperties>
 #include <QSortFilterProxyModel>
@@ -66,6 +67,8 @@ NetView::NetView(NetManager *manager)
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     setSizeAdjustPolicy(QAbstractScrollArea::AdjustToContents);
+    setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+    setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
 
     setSelectionMode(QAbstractItemView::NoSelection);
     setRootIsDecorated(false);
@@ -83,13 +86,8 @@ NetView::NetView(NetManager *manager)
     connect(this, &NetView::activated, this, &NetView::onActivated);
 
     // 支持在触摸屏上滚动
-    QScroller::grabGesture(viewport(), QScroller::TouchGesture);
-    QScrollerProperties sp = QScroller::scroller(viewport())->scrollerProperties();
-    sp.setScrollMetric(QScrollerProperties::VerticalOvershootPolicy, QScrollerProperties::OvershootAlwaysOff);
-    sp.setScrollMetric(QScrollerProperties::HorizontalOvershootPolicy, QScrollerProperties::OvershootAlwaysOff);
-    sp.setScrollMetric(QScrollerProperties::DecelerationFactor, 0.5);
-    sp.setScrollMetric(QScrollerProperties::MaximumVelocity, 0.5);
-    QScroller::scroller(viewport())->setScrollerProperties(sp);
+    setAttribute(Qt::WA_AcceptTouchEvents, true);
+    viewport()->setAttribute(Qt::WA_AcceptTouchEvents, true);
 }
 
 NetView::~NetView() = default;
@@ -183,6 +181,74 @@ void NetView::rowsInserted(const QModelIndex &parent, int start, int end)
 
 bool NetView::viewportEvent(QEvent *event)
 {
+    const QEvent::Type type = event->type();
+    if (type == QEvent::TouchBegin || type == QEvent::TouchUpdate ||
+        type == QEvent::TouchEnd || type == QEvent::TouchCancel) {
+
+        QTouchEvent *te = static_cast<QTouchEvent *>(event);
+        if (te->points().isEmpty()) {
+            event->accept();
+            return true;
+        }
+
+        QEventPoint pt = te->points().first();
+
+        switch (type) {
+        case QEvent::TouchBegin: {
+            m_touchPressPos = pt.globalPosition();
+            m_isDrag = false;
+            break;
+        }
+        case QEvent::TouchUpdate: {
+            QPointF delta = pt.globalPosition() - m_touchPressPos;
+
+            if (!m_isDrag && (qAbs(delta.y()) >= QApplication::startDragDistance() || qAbs(delta.x()) >= QApplication::startDragDistance())) {
+                m_isDrag = true;
+            }
+
+            if (m_isDrag) {
+                if (qAbs(delta.y()) > 0 && verticalScrollBar()) {
+                    verticalScrollBar()->setValue(verticalScrollBar()->value() - delta.y());
+                }
+                if (qAbs(delta.x()) > 0 && horizontalScrollBar()) {
+                    horizontalScrollBar()->setValue(horizontalScrollBar()->value() - delta.x());
+                }
+                m_touchPressPos = pt.globalPosition();
+            }
+            break;
+        }
+        case QEvent::TouchEnd: {
+            if (!m_isDrag) {
+                // Determine the correct target widget for the click
+                QWidget *target = viewport();
+                QPoint widgetPos = pt.position().toPoint();
+
+                if (QWidget *child = target->childAt(widgetPos)) {
+                    target = child;
+                    if (target) {
+                        widgetPos = target->mapFrom(viewport(), widgetPos);
+                    }
+                }
+
+                QMouseEvent press(QEvent::MouseButtonPress, widgetPos, pt.globalPosition(), Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
+                QCoreApplication::sendEvent(target, &press);
+                QMouseEvent release(QEvent::MouseButtonRelease, widgetPos, pt.globalPosition(), Qt::LeftButton, Qt::NoButton, Qt::NoModifier);
+                QCoreApplication::sendEvent(target, &release);
+            }
+            break;
+        }
+        case QEvent::TouchCancel: {
+            m_isDrag = false;
+            break;
+        }
+        default:
+            break;
+        }
+
+        event->accept();
+        return true;
+    }
+
     switch (event->type()) {
     case QEvent::HoverLeave: {
         setCurrentIndex(QModelIndex());

net-view/window/netview.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2019 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2019 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 #ifndef NETVIEW_H
@@ -74,6 +74,8 @@ protected Q_SLOTS:
     NetDelegate *m_delegate;
     bool m_closeOnClear;
     int m_maxHeight;
+    QPointF m_touchPressPos;
+    bool m_isDrag = false;
 };
 
 } // namespace network