C++ 如何更改 drawText 上的字体大小？
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时间：2020-08-27 21:28:33 来源:igfitidea点击:
How to change fontsize on drawText?
提问by jdl
QString str = QString::number((double)i, 'd', 1);
painter->drawText(100 + i * 800/9 - 6, 910, 40, 40, 0, str );
I would like to increase fontSize to 2x what is showing?
我想将 fontSize 增加到 2 倍显示什么？
回答by Iosif Murariu
You could try something like this (haven't compiled code to see if it works!):
你可以尝试这样的事情（还没有编译代码看看它是否有效！）：
QFont font = painter->font() ;
/* twice the size than the current font size */
font.setPointSize(font.pointSize() * 2);
/* set the modified font to the painter */
painter->setFont(font);
/* draw text etc. */
painter.drawText(....);
回答by jdl
Figured it out:
弄清楚了：
QFont font;
font.setPixelSize(12);
for(int i = 0; i < 10; i++){
painter->drawLine(100, 100 + i * 800/9, 900, 100 + i * 800/9);
str = QString::number((double)9 - i, 'd', 1);
painter->setFont(font);
painter->drawText(75, 100 + i * 800/9 - 6, 40, 40, 1, str);
}
回答by Ahmet G?khan Poyraz
this is the easiest way
这是最简单的方法
painter.setFont(QFont("times",22)); //22 is a number which you have to change
