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94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/* ============================================================
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* QupZilla - Qt web browser
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* Copyright (C) 2016 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 "webscrollbar.h"
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#include "webview.h"
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#include "webpage.h"
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#include <QPaintEvent>
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WebScrollBar::WebScrollBar(Qt::Orientation orientation, WebView *view)
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: QScrollBar(orientation)
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, m_view(view)
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{
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setFocusProxy(m_view);
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resize(sizeHint());
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connect(this, &QScrollBar::valueChanged, this, &WebScrollBar::performScroll);
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connect(view, &WebView::focusChanged, this, [this]() { update(); });
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}
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int WebScrollBar::thickness() const
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{
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return orientation() == Qt::Vertical ? width() : height();
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}
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void WebScrollBar::updateValues(const QSize &viewport)
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{
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setMinimum(0);
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setParent(m_view->overlayWidget());
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int newValue;
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if (orientation() == Qt::Vertical) {
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setFixedHeight(m_view->height() - (m_view->height() - viewport.height()) * devicePixelRatioF());
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move(m_view->width() - width(), 0);
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setPageStep(viewport.height());
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setMaximum(std::max(0, m_view->page()->contentsSize().toSize().height() - viewport.height()));
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newValue = m_view->page()->scrollPosition().toPoint().y();
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} else {
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setFixedWidth(m_view->width() - (m_view->width() - viewport.width()) * devicePixelRatioF());
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move(0, m_view->height() - height());
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setPageStep(viewport.width());
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setMaximum(std::max(0, m_view->page()->contentsSize().toSize().width() - viewport.width()));
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newValue = m_view->page()->scrollPosition().toPoint().x();
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}
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if (!isSliderDown()) {
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m_blockScrolling = true;
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setValue(newValue);
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m_blockScrolling = false;
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}
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setVisible(maximum() > minimum());
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}
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void WebScrollBar::performScroll()
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{
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if (m_blockScrolling) {
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return;
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}
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QPointF pos = m_view->page()->scrollPosition();
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if (orientation() == Qt::Vertical) {
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pos.setY(value());
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} else {
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pos.setX(value());
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}
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m_view->page()->setScrollPosition(pos);
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}
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void WebScrollBar::paintEvent(QPaintEvent *ev)
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{
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QPainter painter(this);
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painter.fillRect(ev->rect(), m_view->page()->backgroundColor());
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QScrollBar::paintEvent(ev);
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}
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