//! [2]
void ElidedLabel::paintEvent(QPaintEvent *event)
{
QFrame::paintEvent(event);
QPainter painter(this);
QFontMetrics fontMetrics = painter.fontMetrics();
bool didElide = false;
int lineSpacing = fontMetrics.lineSpacing();
int y = 0;
QTextLayout textLayout(content, painter.font());
textLayout.beginLayout();
forever {
QTextLine line = textLayout.createLine();
if (!line.isValid())
break;
line.setLineWidth(width());
int nextLineY = y + lineSpacing;
if (height() >= nextLineY + lineSpacing) {
line.draw(&painter, QPoint(0, y));
y = nextLineY;
//! [2]
//! [3]
} else {
QString lastLine = content.mid(line.textStart());
QString elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, width());
painter.drawText(QPoint(0, y + fontMetrics.ascent()), elidedLastLine);
line = textLayout.createLine();
didElide = line.isValid();
break;
}
}
textLayout.endLayout();
//! [3]
//! [4]
if (didElide != elided) {
elided = didElide;
emit elisionChanged(didElide);
}
}
void ElidedLabel::paintEvent(QPaintEvent *event)
{
QLabel::paintEvent(event);
QPainter painter(this);
QFontMetrics fontMetrics = painter.fontMetrics();
QRect cr = contentsRect();
cr.adjust(margin(), margin(), -margin(), -margin());
bool didElide = false;
int lineSpacing = fontMetrics.lineSpacing();
int x, y = x =cr.top()+(cr.height()-lineSpacing)/2;
QTextLayout textLayout(mContent, painter.font());
textLayout.beginLayout();
forever {
QTextLine line = textLayout.createLine();
if (!line.isValid())
break;
line.setLineWidth(cr.width()+2*x);
int nextLineY = y + lineSpacing;
if (cr.height() >= nextLineY + lineSpacing) {
line.draw(&painter, QPoint(x, y));
y = nextLineY;
} else {
QString lastLine = mContent.mid(line.textStart());
QString elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, cr.width());
painter.drawText(QPoint(x, y + fontMetrics.ascent()), elidedLastLine);
line = textLayout.createLine();
didElide = line.isValid();
break;
}
}
textLayout.endLayout();
if (didElide != mElided) {
mElided = didElide;
emit elisionChanged(didElide);
}
}
