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69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/* ============================================================
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* QupZilla - WebKit based browser
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* Copyright (C) 2013 David Rosca <nowrep@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* ============================================================ */
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#include "macwebviewscroller.h"
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#include <QApplication>
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#include <QWheelEvent>
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#include <QWebView>
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#include <QTimer>
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// Workaround for QTBUG-22269 (Extremely slow scrolling on Apple trackpads)
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// https://bugreports.qt-project.org/browse/QTBUG-22269
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MacWebViewScroller::MacWebViewScroller(QWebView* view)
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: QObject(view)
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, m_view(view)
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, m_timerRunning(false)
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, m_delta(0)
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{
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view->installEventFilter(this);
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}
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bool MacWebViewScroller::eventFilter(QObject* obj, QEvent* event)
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{
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if (obj != m_view || event->type() != QEvent::Wheel) {
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return false;
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}
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QWheelEvent* ev = static_cast<QWheelEvent*>(event);
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if (ev->buttons() != Qt::NoButton || ev->modifiers() != Qt::NoModifier) {
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return false;
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}
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if (!m_timerRunning) {
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m_delta = ev->delta();
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m_pos = ev->pos();
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m_globalPos = ev->globalPos();
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QTimer::singleShot(25, this, SLOT(sendWheelEvent()));
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m_timerRunning = true;
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}
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else {
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m_delta += ev->delta();
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}
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return true;
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}
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void MacWebViewScroller::sendWheelEvent()
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{
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QWheelEvent ev(m_pos, m_delta, Qt::NoButton, Qt::NoModifier);
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m_view->event(&ev);
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m_timerRunning = false;
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}
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