Qt实现流水灯效果

/*************************************************************** *Copyright(c) 2014-2015 Company By LH Unigress *All rights reserved. *文件名称：流水灯文件 *简要描述： * *当前版本：V1.0 *作者：Kelvin Li *创作日期：2015年4月6日 *说明： *Email：creazylq@163.com *QQ:936563422 ******************************************************************/ #include "widget.h" #include <QString> Widget::Widget(QWidget *parent) : QWidget(parent) { this->setWindowFlags(Qt::FramelessWindowHint); this->setAttribute(Qt::WA_TranslucentBackground);//窗体背景透明 this->m_scrollCaptionLabel = new QLabel(this); this->m_scrollCaptionLabel->setToolTip("模拟流水灯效果"); this->m_scrollCaptionLabel->setFont(QFont("Times",30,QFont::Bold)); this->m_scrollCaptionLabel->setStyleSheet("color: blue;"); this->m_quitButton = new QPushButton(this); this->m_quitButton->setText("退出"); this->m_quitButton->setToolTip("退出程序"); this->buttonlayout = new QHBoxLayout; buttonlayout->addStretch(20); buttonlayout->addWidget(this->m_quitButton); buttonlayout->addStretch(20); m_layout = new QVBoxLayout(this); m_layout->addWidget(m_scrollCaptionLabel); //m_layout->addWidget(this->m_quitButton); m_layout->addLayout(this->buttonlayout); m_layout->setContentsMargins(0,0,0,0); setLayout(this->m_layout); m_scrollCaptionStr = QString("欢迎加入我们:技术在于分享、交流 936563422"); QTimer *m_timer = new QTimer(this); QObject::connect(m_timer,SIGNAL(timeout()),this,SLOT(slot_scrollCaption())); QObject::connect(this->m_quitButton,SIGNAL(clicked()),this,SLOT(close())); m_timer->start(500); } Widget::~Widget() { } void Widget::slot_scrollCaption() { static int nPos = 0; if (nPos > m_scrollCaptionStr.length()) { nPos = 0; } this->m_scrollCaptionLabel->setText(this->m_scrollCaptionStr.mid(nPos)); ++nPos; }