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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "elidinglabel.h"
#include <QFontMetrics>
#include <QPainter>
#include <QStyle>
/*!
\class Utils::ElidingLabel
\brief The ElidingLabel class is a label suitable for displaying elided
text.
*/
namespace Utils {
ElidingLabel::ElidingLabel(QWidget *parent)
: ElidingLabel({}, parent)
{
}
ElidingLabel::ElidingLabel(const QString &text, QWidget *parent)
: QLabel(text, parent)
{
setElideMode(Qt::ElideRight);
}
Qt::TextElideMode ElidingLabel::elideMode() const
{
return m_elideMode;
}
void ElidingLabel::setElideMode(const Qt::TextElideMode &elideMode)
{
m_elideMode = elideMode;
if (elideMode == Qt::ElideNone)
updateToolTip({});
setSizePolicy(QSizePolicy(
m_elideMode == Qt::ElideNone ? QSizePolicy::Preferred : QSizePolicy::Ignored,
QSizePolicy::Preferred,
QSizePolicy::Label));
update();
}
QString ElidingLabel::additionalToolTip()
{
return m_additionalToolTip;
}
void ElidingLabel::setAdditionalToolTip(const QString &additionalToolTip)
{
m_additionalToolTip = additionalToolTip;
}
void ElidingLabel::paintEvent(QPaintEvent *)
{
if (m_elideMode == Qt::ElideNone) {
QLabel::paintEvent(nullptr);
updateToolTip({});
return;
}
const int m = margin();
QRect contents = contentsRect().adjusted(m, m, -m, -m);
QFontMetrics fm = fontMetrics();
QString txt = text();
if (txt.length() > 4 && fm.horizontalAdvance(txt) > contents.width()) {
updateToolTip(txt);
txt = fm.elidedText(txt, m_elideMode, contents.width());
} else {
updateToolTip(QString());
}
int flags = QStyle::visualAlignment(layoutDirection(), alignment()) | Qt::TextSingleLine;
QPainter painter(this);
drawFrame(&painter);
painter.drawText(contents, flags, txt);
}
void ElidingLabel::updateToolTip(const QString &elidedText)
{
if (m_additionalToolTip.isEmpty()) {
setToolTip(elidedText);
return;
}
if (elidedText.isEmpty()) {
setToolTip(m_additionalToolTip);
return;
}
setToolTip(elidedText + m_additionalToolTipSeparator + m_additionalToolTip);
}
QString ElidingLabel::additionalToolTipSeparator() const
{
return m_additionalToolTipSeparator;
}
void ElidingLabel::setAdditionalToolTipSeparator(const QString &newAdditionalToolTipSeparator)
{
m_additionalToolTipSeparator = newAdditionalToolTipSeparator;
}
} // namespace Utils
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