功能说明-按钮(Qt 阴影效果)

以下代码主要实现Qt 阴影效果，我用的是按钮

#include <QGraphicsDropShadowEffect>

void CustomWindow::dropShadowEffect(QWidget* widget) 
{ 
	QGraphicsDropShadowEffect* effect = new QGraphicsDropShadowEffect; effect->setBlurRadius(6); 
	effect->setColor(QColor(0, 0, 0, 100)); 
	effect->setOffset(0,0); 
	widget->setGraphicsEffect(effect); 
}

Qt 按钮阴影效果展示

Qt阴影效果_c/c

功能说明-窗体(Qt 阴影效果)

// 重写窗体的 paintEvent

#include <QPainter>

void CustomWindow::paintEvent(QPaintEvent *event)
{
	QPainterPath path;
	path.setFillRule(Qt::WindingFill);
	path.addRect(10, 10, this->width()-20, this->height()-20);

	QPainter painter(this);
	painter.setRenderHint(QPainter::Antialiasing, true);
	painter.fillPath(path, QBrush(Qt::white));

	QColor color(0,0,0,0);
	int arr[10] = {150,120,80,50,40,30,20,10,5,5};
	for(int i=0; i<10; i++)
	{
	QPainterPath path;
	path.setFillRule(Qt::WindingFill);
	if(i == 5) {
	path.addRect(10-i-1, 10-i-1, this->width()-(10-i)*2, this->height()-(10-i)*2);
	} else {
	path.addRoundedRect(10-i-1, 10-i-1, this->width()-(10-i)*2, this->height()-(10-i)
	*2, 0, 0);
	}
	color.setAlpha(arr[i]);
	painter.setPen(color);
	painter.drawPath(path);

	}
	QWidget::paintEvent(event);

}

Qt 窗体阴影效果展示

Qt阴影效果_c/c_02