ubuntu opencv qt 三位一体的摄像头源码

#include "fullScreenWidget.h" fullScreenWidget::fullScreenWidget() { setWindowState(Qt::WindowActive|Qt::WindowFullScreen); tipWidth = 300; //温馨提示框的宽度 tipHeight = 100; //温馨提示框的高度 infoWidth = 100; //坐标信息框的宽度 infoHeight = 50; //坐标信息框的高度 initFullScreenWidget(); } void fullScreenWidget::initSelectedMenu() { savePixmapAction = new QAction(tr("保存选区"),this); cancelAction = new QAction(tr("重选"),this); quitAction = new QAction(tr("退出"),this); contextMenu = new QMenu(this); connect(savePixmapAction,SIGNAL(triggered()),this,SLOT(savePixmap())); connect(cancelAction,SIGNAL(triggered()),this,SLOT(cancelSelectedRect())); connect(quitAction,SIGNAL(triggered()),this,SLOT(hide())); } void fullScreenWidget::savePixmap() { QString fileName; fileName = QFileDialog::getSaveFileName(this,tr("保存图片"),QDir::currentPath(),tr("Images (*.jpg *.png *.bmp)")); if(fileName.isNull()) return; shotPixmap.save(fileName); hide(); } void fullScreenWidget::loadBackgroundPixmap(const QPixmap &bgPixmap) { int width,height; width = QApplication::desktop()->size().width(); height = QApplication::desktop()->size().height(); loadBackgroundPixmap(bgPixmap,0,0,width,height); } void fullScreenWidget::loadBackgroundPixmap(const QPixmap &bgPixmap, int x, int y, int width, int height) { loadPixmap = bgPixmap; screenx = x; screeny = y; screenwidth = width; screenheight = height; initFullScreenWidget(); } QPixmap fullScreenWidget::getFullScreenPixmap() { initFullScreenWidget(); QPixmap result = QPixmap(); result = QPixmap::grabWindow(QApplication::desktop()->winId()); //抓取当前屏幕的图片 return result; } void fullScreenWidget::paintEvent(QPaintEvent *event) { QColor shadowColor; shadowColor= QColor(0,0,0,100); //阴影颜色设置 painter.begin(this); //进行重绘 painter.setPen(QPen(Qt::blue,2,Qt::SolidLine,Qt::FlatCap));//设置画笔 painter.drawPixmap(screenx,screeny,loadPixmap); //将背景图片画到窗体上 painter.fillRect(screenx,screeny,screenwidth,screenheight,shadowColor); //画影罩效果 switch(currentShotState){ case initShot: drawTipsText(); break; case beginShot: case finishShot: selectedRect = getRect(beginPoint,endPoint); //获取选区 drawSelectedPixmap(); break; case beginMoveShot: case finishMoveShot: selectedRect = getMoveAllSelectedRect(); //获取选区 drawSelectedPixmap(); break; case beginControl: case finishControl: selectedRect = getMoveControlSelectedRect(); drawSelectedPixmap(); break; default: break; } drawXYWHInfo(); //打印坐标信息 painter.end(); //重绘结束 if(currentShotState == finishMoveShot || currentShotState == finishControl){ updateBeginEndPointValue(selectedRect); //当移动完选区后，更新beginPoint,endPoint;为下一次移动做准备工作 } } void fullScreenWidget::keyPressEvent(QKeyEvent *event) { if(event->key() == Qt::Key_Escape){ initFullScreenWidget(); hide(); } } void fullScreenWidget::mousePressEvent(QMouseEvent *event) { //当开始进行拖动进行选择区域时,确定开始选取的beginPoint坐标 if(event->button() == Qt::LeftButton && currentShotState == initShot){ currentShotState = beginShot; //设置当前状态为beginShot状态 beginPoint = event->pos(); } //移动选区改变选区的所在位置 if(event->button() == Qt::LeftButton && isInSelectedRect(event->pos()) && getMoveControlState(event->pos()) == moveControl0){ currentShotState = beginMoveShot; //启用开始移动选取选项,beginMoveShot状态 moveBeginPoint = event->pos(); } //移动控制点改变选区大小 if(event->button() == Qt::LeftButton && getMoveControlState(event->pos()) != moveControl0){ currentShotState = beginControl; //开始移动控制点 controlValue = getMoveControlState(event->pos()); moveBeginPoint = event->pos(); } } void fullScreenWidget::mouseReleaseEvent(QMouseEvent *event) { if(event->button() == Qt::LeftButton && currentShotState == beginShot){ currentShotState = finishShot; endPoint = event->pos(); update(); } if(event->button() == Qt::LeftButton && currentShotState == beginMoveShot){ currentShotState = finishMoveShot; moveEndPoint = event->pos(); update(); } //当前状态为beginControl状态时，设置状态为finishControl if(event->button() == Qt::LeftButton && currentShotState == beginControl){ currentShotState = finishControl; moveEndPoint = event->pos(); update(); } } void fullScreenWidget::mouseMoveEvent(QMouseEvent *event) { //当拖动时，动态的更新所选择的区域 if(currentShotState == beginShot){ endPoint = event->pos(); update(); } //当确定选区后，对选区进行移动操作 if(currentShotState == beginMoveShot || currentShotState == beginControl){ moveEndPoint = event->pos(); update(); } updateMouseShape(event->pos()); //修改鼠标的形状 setMouseTracking(true); } void fullScreenWidget::mouseDoubleClickEvent(QMouseEvent *event) { if(currentShotState == finishShot || currentShotState == finishMoveShot || currentShotState == finishControl){ emit finishPixmap(shotPixmap); //当完成时发送finishPixmap信号 hide(); } } QRect fullScreenWidget::getRect(const QPoint &beginPoint, const QPoint &endPoint) { int x,y,width,height; width = qAbs(beginPoint.x() - endPoint.x()); height = qAbs(beginPoint.y() - endPoint.y()); x = beginPoint.x() < endPoint.x() ? beginPoint.x() : endPoint.x(); y = beginPoint.y() < endPoint.y() ? beginPoint.y() : endPoint.y(); return QRect(x,y,width,height); } void fullScreenWidget::initFullScreenWidget() { currentShotState = initShot; controlValue = moveControl0; beginPoint =QPoint(0,0); endPoint = QPoint(0,0); moveBeginPoint = QPoint(0,0); moveEndPoint = QPoint(0,0); tlRect = QRect(0,0,0,0); //左上点 trRect = QRect(0,0,0,0); //上右点 blRect = QRect(0,0,0,0); //左下点 brRect = QRect(0,0,0,0); //右下点 tcRect = QRect(0,0,0,0); //上中点 bcRect = QRect(0,0,0,0); //下中点 lcRect = QRect(0,0,0,0); //左中点 rcRect = QRect(0,0,0,0); //右中点 setCursor(Qt::CrossCursor); } bool fullScreenWidget::isInSelectedRect(const QPoint &point) { int x,y; QRect selectedRect; if(currentShotState == initShot || currentShotState == beginShot) return false; selectedRect = getSelectedRect(); x = point.x(); y = point.y(); return selectedRect.contains(x,y); } void fullScreenWidget::cancelSelectedRect() { initFullScreenWidget(); update(); //进行重绘，将选取区域去掉 } void fullScreenWidget::contextMenuEvent(QContextMenuEvent *event) { initSelectedMenu(); if(isInSelectedRect(event->pos())){ contextMenu->addAction(savePixmapAction); } else{ contextMenu->addAction(cancelAction); contextMenu->addAction(quitAction); } contextMenu->exec(event->pos()); } void fullScreenWidget::drawTipsText() { int x = (screenwidth - tipWidth)/2; int y = (screenheight - tipHeight)/2; QColor color = QColor(100,100,100,200); QRect rect = QRect(x,y,tipWidth,tipHeight); QString strTipsText = QString(tr("温馨提示\n鼠标拖动进行截屏;截屏区域内右键保存;\n截屏区域外右键取消;ESC退出;")); painter.fillRect(rect,color); painter.setPen(QPen(Qt::white));//设置画笔的颜色为白色 painter.drawText(rect,Qt::AlignCenter,strTipsText); } QRect fullScreenWidget::getSelectedRect() { if(currentShotState == beginMoveShot){ return getMoveAllSelectedRect(); } else if(currentShotState == beginControl){ return getMoveControlSelectedRect(); } else{ return getRect(beginPoint,endPoint); } } void fullScreenWidge