71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
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// Copyright (C) 2022 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include "view.h"
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#include <QTextLayout>
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#include <QPainter>
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View::View(QWidget *parent)
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: QWidget{parent}
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{
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setSizePolicy(QSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Maximum));
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}
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View::~View()
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{
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delete m_layout;
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}
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void View::updateLayout(const QString &sourceString,
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float width,
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QTextOption::WrapMode mode,
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const QFont &font)
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{
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if (m_layout == nullptr)
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m_layout = new QTextLayout;
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m_layout->setText(sourceString);
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QTextOption option;
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option.setWrapMode(mode);
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m_layout->setTextOption(option);
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m_layout->setFont(font);
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m_layout->beginLayout();
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float y = 0.0f;
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forever {
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QTextLine line = m_layout->createLine();
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if (!line.isValid())
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break;
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line.setLineWidth(width);
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line.setPosition(QPointF(0, y));
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y += line.height();
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}
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m_layout->endLayout();
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update();
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updateGeometry();
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}
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QSize View::sizeHint() const
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{
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if (m_layout != nullptr)
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return m_layout->boundingRect().size().toSize();
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else
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return QSize(100, 100);
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}
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void View::paintEvent(QPaintEvent *)
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{
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QPainter p(this);
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if (m_layout != nullptr)
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m_layout->draw(&p, QPointF(0, 0));
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if (!m_bounds.isEmpty()) {
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p.setPen(Qt::NoPen);
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p.setBrush(Qt::yellow);
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p.setOpacity(0.25);
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for (const QRect &r : m_bounds) {
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p.drawRect(r);
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}
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}
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}
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