// Return the layout rect - this is the rect that is given to the layout painting code
// This may be different from the document rect since vertical alignment is not
// done by the text layout code
QRectF QLabelPrivate::layoutRect() const
{
QRectF cr = documentRect();
if (!control)
return cr;
ensureTextLayouted();
// Caculate y position manually
qreal rh = control->document()->documentLayout()->documentSize().height();
qreal yo = 0;
if (align & Qt::AlignVCenter)
yo = qMax((cr.height()-rh)/2, qreal(0));
else if (align & Qt::AlignBottom)
yo = qMax(cr.height()-rh, qreal(0));
return QRectF(cr.x(), yo + cr.y(), cr.width(), cr.height());
}
/*!
Returns the size that will be used if the width of the label is \a
w. If \a w is -1, the sizeHint() is returned. If \a w is 0 minimumSizeHint() is returned
*/
QSize QLabelPrivate::sizeForWidth(int w) const
{
Q_Q(const QLabel);
if(q->minimumWidth() > 0)
w = qMax(w, q->minimumWidth());
QSize contentsMargin(leftmargin + rightmargin, topmargin + bottommargin);
QRect br;
int hextra = 2 * margin;
int vextra = hextra;
QFontMetrics fm = q->fontMetrics();
if (pixmap && !pixmap->isNull()) {
br = pixmap->rect();
br.setSize(br.size() / pixmap->devicePixelRatio());
#ifndef QT_NO_PICTURE
} else if (picture && !picture->isNull()) {
br = picture->boundingRect();
#endif
#if QT_CONFIG(movie)
} else if (movie && !movie->currentPixmap().isNull()) {
br = movie->currentPixmap().rect();
br.setSize(br.size() / movie->currentPixmap().devicePixelRatio());
#endif
} else if (isTextLabel) {
int align = QStyle::visualAlignment(textDirection(), QFlag(this->align));
// Add indentation
int m = indent;
if (m < 0 && q->frameWidth()) // no indent, but we do have a frame
m = fm.width(QLatin1Char('x')) - margin*2;
if (m > 0) {
if ((align & Qt::AlignLeft) || (align & Qt::AlignRight))
hextra += m;
if ((align & Qt::AlignTop) || (align & Qt::AlignBottom))
vextra += m;
}
if (control) {
ensureTextLayouted();
const qreal oldTextWidth = control->textWidth();
// Calculate the length of document if w is the width
if (align & Qt::TextWordWrap) {
if (w >= 0) {
w = qMax(w-hextra-contentsMargin.width(), 0); // strip margin and indent
control->setTextWidth(w);
} else {
control->adjustSize();
}
} else {
control->setTextWidth(-1);
}
QSizeF controlSize = control->size();
br = QRect(QPoint(0, 0), QSize(qCeil(controlSize.width()), qCeil(controlSize.height())));
// restore state
control->setTextWidth(oldTextWidth);
} else {
// Turn off center alignment in order to avoid rounding errors for centering,
// since centering involves a division by 2. At the end, all we want is the size.
int flags = align & ~(Qt::AlignVCenter | Qt::AlignHCenter);
if (hasShortcut) {
flags |= Qt::TextShowMnemonic;
QStyleOption opt;
opt.initFrom(q);
if (!q->style()->styleHint(QStyle::SH_UnderlineShortcut, &opt, q))
flags |= Qt::TextHideMnemonic;
}
bool tryWidth = (w < 0) && (align & Qt::TextWordWrap);
if (tryWidth)
w = qMin(fm.averageCharWidth() * 80, q->maximumSize().width());
else if (w < 0)
w = 2000;
w -= (hextra + contentsMargin.width());
br = fm.boundingRect(0, 0, w ,2000, flags, text);
if (tryWidth && br.height() < 4*fm.lineSpacing() && br.width() > w/2)
br = fm.boundingRect(0, 0, w/2, 2000, flags, text);
if (tryWidth && br.height() < 2*fm.lineSpacing() && br.width() > w/4)
br = fm.boundingRect(0, 0, w/4, 2000, flags, text);
}
} else {
br = QRect(QPoint(0, 0), QSize(fm.averageCharWidth(), fm.lineSpacing()));
}
const QSize contentsSize(br.width() + hextra, br.height() + vextra);
return (contentsSize + contentsMargin).expandedTo(q->minimumSize());
}
/*!
Returns the size that will be used if the width of the label is \a
w. If \a w is -1, the sizeHint() is returned. If \a w is 0 minimumSizeHint() is returned
*/
QSize QLabelPrivate::sizeForWidth(int w) const
{
Q_Q(const QLabel);
QSize contentsMargin(leftmargin + rightmargin, topmargin + bottommargin);
QRect br;
int hextra = 2 * margin;
int vextra = hextra;
QFontMetrics fm = q->fontMetrics();
if (pixmap)
br = pixmap->rect();
#ifndef QT_NO_PICTURE
else if (picture)
br = picture->boundingRect();
#endif
#ifndef QT_NO_MOVIE
else if (movie)
br = movie->currentPixmap().rect();
#endif
else if (isTextLabel) {
int align = QStyle::visualAlignment(q->layoutDirection(), QFlag(this->align));
// Add indentation
int m = indent;
if (m < 0 && q->frameWidth()) // no indent, but we do have a frame
m = fm.width(QLatin1Char('x')) - margin*2;
if (m > 0) {
if ((align & Qt::AlignLeft) || (align & Qt::AlignRight))
hextra += m;
if ((align & Qt::AlignTop) || (align & Qt::AlignBottom))
vextra += m;
}
if (control) {
ensureTextLayouted();
const qreal oldTextWidth = control->textWidth();
// Calculate the length of document if w is the width
if (align & Qt::TextWordWrap) {
if (w >= 0) {
w = qMax(w-hextra-contentsMargin.width(), 0); // strip margin and indent
control->setTextWidth(w);
} else {
control->adjustSize();
}
} else {
control->setTextWidth(-1);
}
br = QRect(QPoint(0, 0), control->size().toSize());
// restore state
control->setTextWidth(oldTextWidth);
} else {
int flags = align;
if (hasShortcut) {
flags |= Qt::TextShowMnemonic;
QStyleOption opt;
opt.initFrom(q);
if (!q->style()->styleHint(QStyle::SH_UnderlineShortcut, &opt, q))
flags |= Qt::TextHideMnemonic;
}
bool tryWidth = (w < 0) && (align & Qt::TextWordWrap);
if (tryWidth)
w = fm.averageCharWidth() * 80;
else if (w < 0)
w = 2000;
w -= (hextra + contentsMargin.width());
br = fm.boundingRect(0, 0, w ,2000, flags, text);
if (tryWidth && br.height() < 4*fm.lineSpacing() && br.width() > w/2)
br = fm.boundingRect(0, 0, w/2, 2000, flags, text);
if (tryWidth && br.height() < 2*fm.lineSpacing() && br.width() > w/4)
br = fm.boundingRect(0, 0, w/4, 2000, flags, text);
}
} else {
br = QRect(QPoint(0, 0), QSize(fm.averageCharWidth(), fm.lineSpacing()));
}
const QSize contentsSize(br.width() + hextra, br.height() + vextra);
return contentsSize + contentsMargin;
}
