61 lines
1.3 KiB
C++
Executable File
61 lines
1.3 KiB
C++
Executable File
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#include "lts_elided_label.h"
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#include <QPaintEvent>
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#include <QResizeEvent>
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namespace LtsWidgets
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{
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void LtsElidedLabel::setElideMode(Qt::TextElideMode elideMode)
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{
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m_elideMode = elideMode;
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m_cachedText.clear();
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update();
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}
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void LtsElidedLabel::resizeEvent(QResizeEvent *e)
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{
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QLabel::resizeEvent(e);
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m_cachedText.clear();
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}
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void LtsElidedLabel::paintEvent(QPaintEvent *e)
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{
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if (m_elideMode == Qt::ElideNone)
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return QLabel::paintEvent(e);
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updateCachedTexts();
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QLabel::setText(m_cachedElidedText);
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QLabel::paintEvent(e);
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QLabel::setText(m_cachedText);
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}
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void LtsElidedLabel::updateCachedTexts()
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{
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const auto txt = text();
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if (m_cachedText == txt)
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return;
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m_cachedText = txt;
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const QFontMetrics fm(fontMetrics());
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m_cachedElidedText = fm.elidedText(text(),
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m_elideMode,
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width(),
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Qt::TextShowMnemonic);
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if (!m_cachedText.isEmpty())
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{
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const QString showFirstCharacter = m_cachedText.at(0) + QStringLiteral("...");
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#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
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const int width = fm.width(showFirstCharacter);
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#else
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const int width = fm.horizontalAdvance(showFirstCharacter);
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#endif
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setMinimumWidth(width + 1);
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}
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}
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}
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