mirror of
https://gitee.com/spark-store-project/spark-store
synced 2025-09-09 12:52:22 +08:00
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*
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* Slight modifications has been done to the code to make it fit into the project.
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*/
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#include "qt/elidedlabel.h"
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#include <QPainter>
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#include <QSizePolicy>
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#include <QTextLayout>
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//! [0]
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ElidedLabel::ElidedLabel(const QString &text, QWidget *parent)
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: QFrame(parent)
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, elided(false)
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, content(text)
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{
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
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}
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//! [0]
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//! [1]
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void ElidedLabel::setText(const QString &newText)
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{
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content = newText;
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update();
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}
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//! [1]
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//! [2]
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void ElidedLabel::paintEvent(QPaintEvent *event)
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{
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QFrame::paintEvent(event);
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QPainter painter(this);
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QFontMetrics fontMetrics = painter.fontMetrics();
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bool didElide = false;
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int lineSpacing = fontMetrics.lineSpacing();
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int y = 0;
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QTextLayout textLayout(content, painter.font());
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textLayout.beginLayout();
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forever {
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QTextLine line = textLayout.createLine();
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if (!line.isValid())
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break;
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line.setLineWidth(width());
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int nextLineY = y + lineSpacing;
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if (height() >= nextLineY + lineSpacing) {
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line.draw(&painter, QPoint(0, y));
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y = nextLineY;
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//! [2]
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//! [3]
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} else {
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QString lastLine = content.mid(line.textStart());
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QString elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, width());
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painter.drawText(QPoint(0, y + fontMetrics.ascent()), elidedLastLine);
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line = textLayout.createLine();
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didElide = line.isValid();
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break;
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}
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}
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textLayout.endLayout();
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//! [3]
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//! [4]
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if (didElide != elided) {
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elided = didElide;
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emit elisionChanged(didElide);
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}
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}
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ElidedLabel::ElidedLabel(QWidget *parent)
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: QFrame(parent)
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, elided(false)
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, content("")
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{
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
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}
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//! [4]
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