Qt模仿实现文字浮动字母的效果

virtual void timerEvent(QTimerEvent *event);

QCustomLabel *lab = new QCustomLabel(this);
QSize size = lab->SetTextData(m_vetContent[m_nTimerTriggerNumber], 1);
int nTop = (height() - size.height()) / 2;
lab->setGeometry(DistanceLeft, nTop, size.width(), size.height());
lab->show();
m_vetControls.push_font(lab);

for (int i = 0; i < m_vetControls.size(); i++)
{
	QCustomLabel *lab = m_vetControls[i];
	QSize size = lab->UpdateZoomStyle(bFontZoom);
	QRectF rectF = lab->geometry();
	if (nTop == 0)
	{
		nTop = lab->geometry().top();
	}
	else
	{
		nTop = nTop - size.height();
	}
	lab->move(DistanceLeft, nTop);
}
this->update();

if (m_nTimerTriggerNumber == m_vetContent.size())
{
	killTimer(m_nTimerId);
	m_nTimerId = 0;
}

#pragma once

#include <QLabel>

class QCustomLabel : public QLabel
{
	Q_OBJECT

public:
	QCustomLabel(QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
	~QCustomLabel();
};

#include "QCustomLabel.h"
QCustomLabel::QCustomLabel(QWidget *parent, Qt::WindowFlags f)
	: QLabel(parent, f)
{
}

QCustomLabel::~QCustomLabel()
{
}

QTime time = QTime::currentTime();
qsrand(time.msec() + time.second() * 1000);
int nFontSize = qrand() % 30 + 20;

QFont fontContent =this->font();
//设置：字体样式：微软雅黑
fontContent.setFamily("Microsoft YaHei");
//设置：字体大小：22
fontContent.setPixelSize(nFontSize);
//字体绑定
this->setFont(fontContent);

QFontMetrics metrics(font());
int nheight = metrics.height();
//设置内容并存储文本内容
m_qsTextContent = QString::fromLocal8Bit(sText.c_str());
setFixedHeight(nheight);
this->setText(m_qsTextContent);
this->adjustSize();
int nwidth = this->width();
//设置自定义QLable控件的宽度以及高度
QSize size(nwidth , nheight);

//开启定时器
m_nTimerId = startTimer(100);
return size;

QFontMetrics metrics(font());
int x = 0;
int y = (height() + metrics.ascent() - metrics.descent()) / 2;
QColor color;
for (int i = 0; i < m_qsTextContent.size(); i++)
{
	//设置：色调（H）、饱和度（S）、亮度（Y）
	int nIndex = (m_nStep + i) % 16;
	color.setHsv((15 - nIndex) * 16, 255, 191);
	painter->setPen(color);
	//单个字符绘制
	painter->drawText(x, y, QString(m_qsTextContent[i]));
	//计算下一个字符的x坐标起始点
	x += metrics.width(m_qsTextContent[i]);
}