danmu.rar_屏幕弹幕_弹幕

#include "danmu.h" Danmu::Danmu(QWidget * parent, QString text, unsigned int color, int type, QFont danmufont, double transparency, int runtime) :QLabel(parent),DText(text),color(color),type(type),danmuFont(danmufont),Transparency(transparency),runTime(runtime) { QDesktopWidget* desketopWidget; desketopWidget=QApplication::desktop(); screenrect=desketopWidget->screenGeometry(); //QApplication:: QFontMetrics metrics(danmuFont); palette=QPalette(); setMyPalette(); this->setPalette(palette); //设置调色盘 this->setFixedHeight(metrics.height()+5); this->setFixedWidth(metrics.width(DText)+4); int yy = qrand()%screenrect.height(); int y = yy<(screenrect.height()-metrics.height()-5)?(yy):(screenrect.height()-metrics.height()-5); int xx = screenrect.width()+10; this->move(xx,y); this->setPosX(xx);//设置弹幕水平的位置 this->setPosY(y); //设置弹幕垂直位置 this->setWindowFlags(Qt::FramelessWindowHint|Qt::Tool|Qt::WindowStaysOnTopHint); //设置弹幕为无窗口无工具栏且呆在窗口顶端 this->setAttribute(Qt::WA_TranslucentBackground, true); this->setFocusPolicy(Qt::NoFocus); this->hide(); anim2=new QPropertyAnimation(this, "pos"); anim2->setDuration(runTime); anim2->setStartValue(QPoint(PosX,PosY)); anim2->setEndValue(QPoint(-(this->width()), PosY)); anim2->setEasingCurve(QEasingCurve::Linear); this->setWindowOpacity(Transparency); this->show(); this->repaint(); } void Danmu::paintEvent(QPaintEvent *) { //弹幕绘制函数 QPainter painter(this); //以弹幕窗口为画布 painter.save(); QFontMetrics metrics(danmuFont); //获取弹幕字体 QPainterPath path; //描绘路径用 QPen pen(QColor(0, 0, 0, 230)); //自定义画笔的样式，让文字周围有边框 painter.setRenderHint(QPainter::Antialiasing); int penwidth = 4; pen.setWidth(penwidth); int len = metrics.width(DText); int w = this->width(); int px = (len - w) / 2; if(px < 0) { px = -px; } int py = (height() - metrics.height()) / 2 + metrics.ascent(); if(py < 0) { py = -py; } path.addText(px+2,py+2,danmuFont,DText); //画字体轮廓 painter.strokePath(path, pen); painter.drawPath(path); painter.fillPath(path, QBrush(qcolor)); //用画刷填充 painter.restore(); } Danmu::~Danmu() { qDebug()<<"弹幕被析构"<<endl; } void Danmu::setPosX(int posx) { this->PosX = posx; } void Danmu::setPosY(int posy) { this->PosY = posy; } void Danmu::setQColor(QColor qcolor) { this->qcolor = qcolor; } void Danmu::setMyPalette() { switch (color) { case WHITE: palette.setColor(QPalette::WindowText,QColor(255,255,246,255)); this->setQColor(QColor(255,255,246,255)); break; case RED: palette.setColor(QPalette::WindowText,QColor(231,0,18,255)); this->setQColor(QColor(231,0,18,255)); break; case YELLOW: palette.setColor(QPalette::WindowText,QColor(254,241,2,255)); this->setQColor(QColor(254,241,2,255)); break; case GREEN: palette.setColor(QPalette::WindowText,QColor(0,152,67,255)); this->setQColor(QColor(0,152,67,255)); break; case BLUE: palette.setColor(QPalette::WindowText,QColor(0,160,234,255)); this->setQColor(QColor(0,160,234,255)); break; case PINK: palette.setColor(QPalette::WindowText,QColor(226,2,127,255)); this->setQColor(QColor(226,2,127,255)); break; case GRASS: palette.setColor(QPalette::WindowText,QColor(144,195,32,255)); this->setQColor(QColor(144,195,32,255)); break; case DBLUE: palette.setColor(QPalette::WindowText,QColor(0,46,114,255)); this->setQColor(QColor(0,46,114,255)); break; case DYELLLOW: palette.setColor(QPalette::WindowText,QColor(240,171,42,255)); this->setQColor(QColor(240,171,42,255)); break; case DPURPLE: palette.setColor(QPalette::WindowText,QColor(104,58,123,255)); this->setQColor(QColor(104,58,123,255)); break; case LBLUE: palette.setColor(QPalette::WindowText,QColor(129,193,205,255)); this->setQColor(QColor(129,193,205,255)); break; case BROWN: palette.setColor(QPalette::WindowText,QColor(149,119,57,255)); this->setQColor(QColor(149,119,57,255)); break; default: palette.setColor(QPalette::WindowText,QColor(255,255,246,255)); this->setQColor(QColor(255,255,246,255)); break; } } void Danmu::enterEvent(QEvent *event) { anim2->stop(); anim2->setStartValue(QPoint(this->x(),PosY)); QWidget::enterEvent(event); } void Danmu::leaveEvent(QEvent *event) { runTime=(int)(runTime*((double)(this->x()+this->width())/(double)(screenrect.width()+10+this->width()))); anim2->setDuration(runTime); anim2->start(); QWidget::enterEvent(event); } void Danmu::danmuLaunch() { anim2->start(); connect(anim2,SIGNAL(finished()),this,SLOT(deleteLater())); }