[英]drawText on QGraphicsView::drawForeground
My code is below. 我的代码如下。
void MyView::drawForeground(QPainter *painter, const QRectF &rect)
{
Q_UNUSED(rect);
painter->save();
QRectF rt = viewport()->rect();
painter->setWorldMatrixEnabled(false);
QString strInfo = "test12345";
painter->setBrush(Qt::NoBrush);
painter->setPen(Qt::white);
painter->setFont(QFont("Segoe UI", 200, QFont::Bold));
QFontMetrics fm(painter->font());
int fmWidth = fm.width(strInfo, strInfo.length());
int fmHeight = fm.height();
painter->drawRect(rt);
painter->drawText(10, 10, fmWidth, fmHeight, Qt::AlignCenter, strInfo);
painter->drawRect(10, 10, fmWidth, fmHeight);
painter->setWorldMatrixEnabled(true);
painter->restore();
}
result image 结果图片
QfontMetrics does not seem to return the correct size. QfontMetrics似乎没有返回正确的大小。 What's wrong with my code?
我的代码有什么问题?
I do not know what to do anymore. 我不知道该怎么办了。
QFontMetrics returns the size of the white rectangle of the attached image, but the actual Text is drawn small. QFontMetrics返回附加图像的白色矩形的大小,但实际的Text绘制得很小。
不管QPainter::setWorldMatrixEnabled(false)
, QPainter::drawText()
充当场景坐标。
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