Height of the text without balnk space at the top

[THRESHE]

Hello everyone
I need to center text in a rectangle and I use QFontMetrics::height() to know the height of it.
But it doesn't return me the height but instead it gives me blank space at the top

QPainter painter(this);
painter.setPen(QPen(QColor(Qt::black)));
QFont font = QFont("Times", 50, QFont::Normal);
painter.setFont(font);
QFontMetrics metrics(font);
 
int heightOfText  = metrics.height();
painter.drawLine(0, 200 - heightOfText,
						1000, 200 - heightOfText);
painter.drawLine(0, 200, 1000, 200);
painter.drawText(0, 200, "Gradient Text");

QPainter painter(this);
painter.setPen(QPen(QColor(Qt::black)));
QFont font = QFont("Times", 50, QFont::Normal);
painter.setFont(font);
QFontMetrics metrics(font);

int heightOfText  = metrics.height();
painter.drawLine(0, 200 - heightOfText,
						1000, 200 - heightOfText);
painter.drawLine(0, 200, 1000, 200);
painter.drawText(0, 200, "Gradient Text");

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This code gives me the result displayed on the screenshot below
So My question is how to find text height without that blank space ?
(I suppose it has something with ascent and descent...)

[aamer4yu]

or something with lineSpacing() ?? am not sure...

by the way in which case u need to draw lines for text ?? just curious abt what u implemented

[THRESHE]

Lines are just for debugging And I've tried line spacing but it didn't help

[aamer4yu]

Just for debugging ??
will this string wont help in this case ??
str = "-------------------------------------------------------------";

why do u need such complex code that lines shud be just touching text ??
wont printing the above simple string solve the purpose ??

[wysota]

Use QFontMetrics::boundingRect().

[THRESHE]

Tried that already it didn't work.

Closest to the height of the text is

QFont font = QFont("Trebushet MS", 50, QFont::Normal);
QFontMetrics metrics(font);
 
int height = metrics.ascent() - metrics.descent() + metrics.leading();

QFont font = QFont("Trebushet MS", 50, QFont::Normal);
QFontMetrics metrics(font);

int height = metrics.ascent() - metrics.descent() + metrics.leading();

To copy to clipboard, switch view to plain text mode 

[Lykurg]

Hi,

the space on top is what is needed for letters like "gjqy" under the baseline. By drawing the Text

painter.drawText(0, 200, "Gradient Text");

painter.drawText(0, 200, "Gradient Text");

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you set the baseline at 200. To get the Text vertical centered use

painter.drawText(0, 200+(metrics.boundingRect("m").y()/2), "Gradient Text");

painter.drawText(0, 200+(metrics.boundingRect("m").y()/2), "Gradient Text");

To copy to clipboard, switch view to plain text mode 

if you have no "gy..." or use

void QPainter::drawText ( int x, int y, int width, int height, int flags, const QString & text, QRect * boundingRect = 0 )

void QPainter::drawText ( int x, int y, int width, int height, int flags, const QString & text, QRect * boundingRect = 0 )

To copy to clipboard, switch view to plain text mode 

with Qt::AlignHCenter.


Lykurg