QT字体阴影

继承QLabel类后重写parntEvent函数，提升为控件即可使用。

.h

#pragma once

#include <QLabel>

class FontQlabel : public QLabel
{
	Q_OBJECT

public:
	FontQlabel(QWidget *parent);
	~FontQlabel();

protected:
	void paintEvent(QPaintEvent *) override;

};

.cpp

#include "FontQlabel.h"
#include <QPainter>


FontQlabel::FontQlabel(QWidget *parent)
	: QLabel(parent)
{
}

FontQlabel::~FontQlabel()
{
}

void FontQlabel::paintEvent(QPaintEvent *)
{
	QPainter painter(this);
	painter.setRenderHints(QPainter::Antialiasing);

	QFont font = painter.font();
	//font.setPixelSize(160);

	QFontMetrics fm(font);
	QRect rect = fm.boundingRect(this->rect(), Qt::AlignCenter, this->text());

	QPainterPath path;
	path.addText(rect.x(), rect.y() + fm.ascent(), font, this->text());

	//上层颜色
	painter.setOpacity(0.5);
	painter.fillPath(path, Qt::black);
	//设置边
	//painter.strokePath(path, QPen(Qt::black, 5));

	//底层颜色
	painter.save();
	painter.setOpacity(1);
	painter.translate(-4, -3);
	painter.fillPath(path, Qt::white);
	//设置边
	//painter.strokePath(path, QPen(Qt::black, 4));
	painter.restore();

}