Qt 截图，动态选择矩形，仿QQ，画图

#include "imagewidget.h" #include <QShortcut> #include <Windows.h> #include <vector> std::vector<QRect> allWindowRect; //用于存储所有的窗口 std::vector<HWND> allWindowHwnd; //用于存储所有的窗口句柄 std::vector<MyRect> myRectRestlt; // 找到所有包含 鼠标当前移动点的矩形，并保存其到各边的距离之和。 //声明回调函数 bool CALLBACK MyEnumWindowsProc(HWND hwnd,LPARAM lParam); QString str; ImageWidget::ImageWidget(QWidget *parent) : QWidget(parent) { ui.setupUi(this); //用于获取窗口大小 QDesktopWidget *dtw = QApplication::desktop(); isPainting = false; isPressed = false; isDragging = false; isDrawText = false; isSelectRect = true; isResizeRect = true; isFristMove = true; canMove = true; dx = 0; dy = 0; //打开鼠标 跟踪 setMouseTracking(true); //遍历窗口 获得各个窗口的大小 ::EnumWindows((WNDENUMPROC)MyEnumWindowsProc,0); //获得 整个屏幕 pixmapTemp = pixmapTemp.grabWindow(QApplication::desktop()->winId(),0,0,dtw->width(),dtw->height()); pixmapOrg = pixmapTemp; textContent = new QLineEdit(this); textContent->hide(); connect(captureMenu_.ui.cancelPushButton,SIGNAL(clicked()),this,SLOT(slotCloseMyself())); connect(captureMenu_.ui.savePushButton,SIGNAL(clicked()),this,SLOT(slotSaveToFile())); connect(captureMenu_.ui.addLinePushButton,SIGNAL(clicked()),this,SLOT(slotPaintLine())); connect(captureMenu_.ui.addRectPushButton,SIGNAL(clicked()),this,SLOT(slotPaintRect())); connect(captureMenu_.ui.addCiclePushButton,SIGNAL(clicked()),this,SLOT(slotPaintCicle())); connect(captureMenu_.ui.penPushButton,SIGNAL(clicked()),this,SLOT(slotPaintFree())); connect(captureMenu_.ui.redPushButton,SIGNAL(clicked()),this,SLOT(slotRedPen())); connect(captureMenu_.ui.whitePushButton,SIGNAL(clicked()),this,SLOT(slotWhitePen())); connect(captureMenu_.ui.blackPushButton,SIGNAL(clicked()),this,SLOT(slotBlackPen())); connect(captureMenu_.ui.bluePushButton,SIGNAL(clicked()),this,SLOT(slotBluePen())); connect(captureMenu_.ui.yellowPushButton,SIGNAL(clicked()),this,SLOT(slotYellowPen())); connect(captureMenu_.ui.purposePushButton,SIGNAL(clicked()),this,SLOT(slotPurplePen())); connect(captureMenu_.ui.noPushButton,SIGNAL(clicked()),this,SLOT(slotGrayPen())); connect(captureMenu_.ui.greenPushButton,SIGNAL(clicked()),this,SLOT(slotGreenPen())); connect(captureMenu_.ui.fontAPushButton,SIGNAL(clicked()),this,SLOT(slotPenA())); connect(captureMenu_.ui.fontBPushButton,SIGNAL(clicked()),this,SLOT(slotPenB())); connect(captureMenu_.ui.fontCPushButton,SIGNAL(clicked()),this,SLOT(slotPenC())); connect(captureMenu_.ui.addTextPushButton,SIGNAL(clicked()),this,SLOT(slotPaintText())); connect(textContent,SIGNAL(returnPressed()),this,SLOT(slotSetText())); captureMenu_.ui.currentColorLabel->setStyleSheet("background-color:black"); QShortcut *send_access= new QShortcut(QKeySequence(tr("esc")), this); connect(send_access, SIGNAL(activated()), this,SLOT(slotCloseMyself())); paintType = MOVE; } ImageWidget::~ImageWidget(){} void ImageWidget::paintEvent(QPaintEvent *event) { QPainter painter(this); QPen pen; pen.setWidth(4); pen.setColor(QColor(0,255,255,127)); painter.setPen(pen); QPixmap tempNew(pixmapOrg.size()); QPainter p(&tempNew); p.setCompositionMode(QPainter::CompositionMode_Source); p.drawPixmap(0, 0, pixmapOrg); p.setCompositionMode(QPainter::CompositionMode_DestinationIn); p.fillRect(tempNew.rect(), QColor(50, 50, 50, 120)); painter.drawPixmap(0,0,tempNew);//把图片调 暗 以显示截图全屏 if (isSelectRect)//如果是选定区域 { if (isDragging)//手选区域大小 { dragPaint(&painter); } else //自动选定区域大小 { autoPaint(&painter); } } else//如果不是选定区域 也就是 画画、移动区域 或者是 改变区域大小 { if (isPainting)//画画 { paintSomeThing(&painter); } else if (isResizeRect)//改变区域大小 { resizeSelectedRect(&painter); } else if(isFristMove)//移动区域 { moveTheRect(&painter); } } QPixmap pix(92,36); pix.fill(QColor(0,0,0,120)); QPainter px(&pix); QPen penRect(QColor(255,255,255,255)); px.setPen(penRect); QString temp; temp = tr("大小:%1×%2").arg(selectedRect.width).arg(selectedRect.height); px.drawText(0,15,temp); temp = tr("位置:%1,%2").arg(selectedRect.ptStart_.x()+dx).arg(selectedRect.ptStart_.y()+dy); px.drawText(0,30,temp); QPainter ptemp(this); ptemp.drawPixmap(selectedRect.ptStart_.x()+selectedRect.width-95 +dx,selectedRect.ptStart_.y()-40+dy,pix); QPen penPoint; penPoint.setColor(QColor(0,0,255,255)); penPoint.setWidth(8); QPainter painterPoint(this); painterPoint.setPen(penPoint); if (isResizeRect) { painterPoint.drawPoint(selectedRect.ptStart_); painterPoint.drawPoint(selectedRect.ptStart_.x()+selectedRect.width/2,selectedRect.ptStart_.y()); painterPoint.drawPoint(selectedRect.ptStart_.x()+selectedRect.width,selectedRect.ptStart_.y()); painterPoint.drawPoint(selectedRect.ptStart_.x(),selectedRect.ptStart_.y()+selectedRect.height/2); painterPoint.drawPoint(selectedRect.ptEnd_.x(),selectedRect.ptStart_.y()+selectedRect.height/2); painterPoint.drawPoint(selectedRect.ptStart_.x(),selectedRect.ptStart_.y()+selectedRect.height); painterPoint.drawPoint(selectedRect.ptStart_.x()+selectedRect.width/2,selectedRect.ptStart_.y()+selectedRect.height); painterPoint.drawPoint(selectedRect.ptStart_.x()+selectedRect.width,selectedRect.ptStart_.y()+selectedRect.height); } else if(isFristMove && canMove) { painterPoint.drawPoint(selectedRect.ptStart_.x() + dx ,selectedRect.ptStart_.y() + dy); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx +selectedRect.width/2,selectedRect.ptStart_.y() + dy); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx +selectedRect.width,selectedRect.ptStart_.y() + dy); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx ,selectedRect.ptStart_.y() + dy +selectedRect.height/2); painterPoint.drawPoint(selectedRect.ptEnd_.x() + dx ,selectedRect.ptStart_.y() + dy +selectedRect.height/2); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx ,selectedRect.ptStart_.y() + dy +selectedRect.height); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx +selectedRect.width/2,selectedRect.ptStart_.y() + dy +selectedRect.height); painterPoint.drawPoint(selectedRect.ptStart_.x() + dx +selectedRect.width,selectedRect.ptStart_.y() + dy +selectedRect.height); } } void ImageWidget::mousePressEvent(QMouseEvent *event) { if (isSelectRect) { pStart_.setX(event->x()); pStart_.setY(event->y()); } else { if(isPainting) { paintStart.setX(event->x()); paintStart.setY(event->y()); paintMove.setX(event->x()); //保证 乱画时不会连接 其他地方isPressed paintMove.setY(event->y()); selectedRect.selectedPixmap_ = pixmapTemp; if (isDrawText) { textContent->clear(); textContent->move(event->x(),event->y()); textContent->show(); isDrawText = false; paintType = TEXT; } } else if (isFristMove) //如果在 矩形框内按下鼠标 表示想要移动矩形 { MoveStart.setX(event->x());//保存按下的第一个鼠标点，用于计算dx，dy MoveStart.setY(event->y()); if(event->y() < selectedRect.ptEnd_.y() - 5 && event->y() > selectedRect.ptStart_.y()+5 && event->x() > selectedRect.ptStart_.x()+5 && event->x() < selectedRect.ptEnd_.x() - 5) { isResizeRect = false; setCursor(Qt::SizeAllCursor); } } else if(isResizeRect){} } isPressed = true; } void ImageWidget::mouseMoveEvent(QMouseEvent *event) { QFile file("log.txt"); // if(!file.open(QIODevice::WriteOnly |QIODevice::Text)) // QMessageBox::information(this,tr("aa"),tr("bb")); int i = 0; if (isSelectRect) { if (isPressed) //如果按下 鼠标 开始 区域截图 { isDragging = true; pMove_.setX(event->x()); pMove_.setY(event->y()); } else //如果没有按下鼠标 开始自动寻找合适窗口 //、应该改为 找到距离最近的 矩形块 。。。！！！