Qt简单截图工具

截图效果：

1、截图获取 

该截图实现的是静态截图，实际就是先调用grabWindow函数获取窗口图片然后设置到截图控件中进行操作。

//通过调用事件循环来保证当前截图获取完整
QEventLoop loop;
QTimer::singleShot(100, &loop, SLOT(quit()));
loop.exec();
QPixmap pix=QApplication::primaryScreen()->grabWindow(0);
if(pix.isNull())
{}
QImage image = pix.toImage();

grabWindow（）函数官方解释：创建并返回一个像素图，该像素图是通过抓取受QRect(x, y, width, height)限制的给定窗口的内容构造的。
参数(x, y)指定窗口中的偏移量，而(width, height)指定要复制的区域。如果width为负值，则该函数将所有内容复制到窗口的右边框。如果height为负，则该函数将所有内容复制到窗口的底部。
可以使用QWidget::winId()函数检索窗口系统标识符(WId)。使用窗口标识符而不是QWidget的基本原理是允许抓取不属于应用程序、窗口系统框架等的窗口。
警告:抓取不属于应用程序的窗口在iOS等系统上是不支持的，其中沙箱/安全会阻止读取不属于应用程序的窗口的像素。
grabWindow()函数从屏幕上抓取像素，而不是从窗口中，也就是说，如果有另一个窗口部分或全部在你抓取的窗口上，你也会从覆盖的窗口中获取像素。鼠标光标一般不会被抓取。
注意在X11上，如果给定的窗口与根窗口的深度不同，并且另一个窗口部分或完全遮蔽了您抓取的窗口，那么您将无法从覆盖的窗口获得像素。像素图中模糊区域的内容将未定义且未初始化。
在Windows Vista及以上抓取分层窗口，这是通过设置Qt::WA_TranslucentBackground属性创建的，将不工作。相反，抓取桌面小部件应该可以工作。
警告:一般来说，抓取屏幕外的区域是不安全的。这取决于底层的窗口系统。

QApplication::primaryScreen()->grabWindow(0);表示当前应用最底层窗口，通常是桌面。

2、对截图区域进行编辑

1、设计截图处理类

ScreenshotToolWidget.h

#ifndef PRINTSCREENDISCUSSIONWIDGET_H
#define PRINTSCREENDISCUSSIONWIDGET_H#include 
#include "ScreenshotToolOperatioWidget.h"
#include "readqss.h"class ScreenshotToolWidget : public QWidget
{Q_OBJECTpublic:explicit ScreenshotToolWidget(QWidget *parent = 0);~ScreenshotToolWidget();public:void setImage(QImage image);                      // 设置图片void setIscut(bool isCut);                        // 设置是否截屏public slots:void slot_cancelScreenshotToolWidget(void);      // 取消截屏void slot_sendCutImage(void);                           // 发送截图private:enum SCALE_TYPE{SCALE_TYPE_NOSCALE,                // 无缩放操作SCALE_TYPE_LEFTTOP,                // 左上角缩放SCALE_TYPE_LEFTBOTTOM,             // 左下角缩放SCALE_TYPE_RIGTHTOP,               // 右上角缩放SCALE_TYPE_RIGHTBOTTOM,            // 右下角缩放SCALE_TYPE_MIDUP,                  // 上中角缩放SCALE_TYPE_MIDBELLOW,              // 下中缩放SCALE_TYPE_MIDLEFT,                // 左中角缩放SCALE_TYPE_MIDRIGHT                // 右中角缩放};signals:void signal_cancelScreenshotToolWidget(QString imageFullName);    // 取消截图void signal_sendPrintScreenWidget(QString imageFullName);        // 发送protected:void initMenuWidget();void moveTargetArea(QPoint movePos);                                            // 移动目标区域void scaleTargetArea(ScreenshotToolWidget::SCALE_TYPE  type, QPoint point);        // 缩放目标区域void changeMenuPos(void);                             // 操作菜单位置显示void setControlPoint(void);                         // 设置控制点protected:void paintEvent(QPaintEvent *event);void mousePressEvent(QMouseEvent *event);void mouseMoveEvent(QMouseEvent *event);void mouseReleaseEvent(QMouseEvent *event);void resizeEvent(QResizeEvent *event);private:SCALE_TYPE _scaleType;                          // 缩放方向QImage  *_pImageBuffer;                         // 背景图像缓存QImage  _targetImage;                           // 选中的目标区域的图片QPoint _lastMousePos;                           // 鼠标最后停留的位置bool   _mousePressed;                           // 鼠标被按下bool  _isCut;                                   // 是否截取ScreenshotToolOperatioWidget *_pScreenshotToolOperatioWidget;       // 截图菜单界面QRect  _targetRect;                             // 目标区域QRect  _leftTopControlRect;                     // 左上角控制点QRect  _rightTopControlRect;                    // 右上角控制点QRect  _leftBottomControlRect;                  // 左下角控制点QRect  _rightBottomControlRect;                 // 右下角控制点QRect  _midUpControlRect;                       // 中上控制点QRect  _midBelowControlRect;                    // 中下控制点QRect  _midLeftControlRect;                     // 左中控制点QRect  _midRightControlRect;                    // 中右控制点};#endif // PRINTSCREENDISCUSSIONWIDGET_H

ScreenshotToolWidget.cpp

#include "ScreenshotToolWidget.h"
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include "SimpleFun.h"
#include "FuncRunDataManager.h"
#include "DesktopResize.h"
#include 
#include ScreenshotToolWidget::ScreenshotToolWidget(QWidget *parent) :QWidget(parent),_mousePressed(false),_isCut(false),_pScreenshotToolOperatioWidget(NULL)
{setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);this->setAttribute(Qt::WA_TranslucentBackground);setMouseTracking(true);// 鼠标追踪// 创建一个QImage缓存_pImageBuffer=new QImage();assert(0 != _pImageBuffer);initMenuWidget();
}void ScreenshotToolWidget::paintEvent(QPaintEvent *event)
{if(!_isCut){if (!_pImageBuffer->isNull()){// 样式表用于Qwidget加载样式表QStylePainter stylePainter(this);QStyleOption opt;opt.initFrom(this);opt.rect = rect();stylePainter.drawPrimitive(QStyle::PE_Widget, opt);// 半透明背景，设置一个黑色蒙层QPainter dousePainter(this);//先绘图获取截图图片dousePainter.drawImage(this->rect(), *_pImageBuffer);dousePainter.setBrush(QBrush(QColor(0, 0, 0, 100)));dousePainter.drawRect(this->rect());// 绘制截图目标选定区域QPainter magnifyingPainter(this);magnifyingPainter.setRenderHint(QPainter::Antialiasing, true);QPen     magnifyingPen;magnifyingPen.setStyle(Qt::SolidLine);magnifyingPen.setWidth(4);magnifyingPen.setBrush(QBrush(QColor(65, 149, 235, 255)));magnifyingPen.setCapStyle(Qt::RoundCap);magnifyingPen.setJoinStyle(Qt::RoundJoin);magnifyingPainter.setPen(magnifyingPen);magnifyingPainter.drawRect(_targetRect);// 绘制目标区域图片QPainter targetPainter(this);targetPainter.setRenderHint(QPainter::Antialiasing, true);// 返回图像的子区域作为新图像。返回的图像是从该图像中的位置(rectangle.x()，         // rectangle.y())复制的，并且始终具有给定矩形的大小。QImage targetImage = _pImageBuffer->copy(_targetRect);targetPainter.drawImage(_targetRect, targetImage);// 绘制圆形控制点QPainter  ctrlPainter(this);ctrlPainter.setRenderHint(QPainter::Antialiasing, true);QPen      ctrlPen;ctrlPen.setStyle(Qt::SolidLine);ctrlPen.setWidth(2);ctrlPen.setBrush(QBrush(QColor(12, 157, 250, 255)));ctrlPen.setCapStyle(Qt::RoundCap);ctrlPen.setJoinStyle(Qt::RoundJoin);ctrlPainter.setPen(ctrlPen);ctrlPainter.setBrush(QBrush(QColor(12, 157, 250)));ctrlPainter.drawRoundedRect(_leftTopControlRect, _leftTopControlRect.width() / 2, _leftTopControlRect.height() / 2);ctrlPainter.drawRoundedRect(_leftBottomControlRect, _leftBottomControlRect.width() / 2, _leftBottomControlRect.height() / 2);ctrlPainter.drawRoundedRect(_rightTopControlRect, _rightTopControlRect.width() / 2, _rightTopControlRect.height() / 2);ctrlPainter.drawRoundedRect(_rightBottomControlRect, _rightBottomControlRect.width() / 2, _rightBottomControlRect.height() / 2);ctrlPainter.drawRoundedRect(_midBelowControlRect, _midBelowControlRect.width() / 2, _midBelowControlRect.height() / 2);ctrlPainter.drawRoundedRect(_midLeftControlRect, _midLeftControlRect.width() / 2, _midLeftControlRect.height() / 2);ctrlPainter.drawRoundedRect(_midRightControlRect, _midRightControlRect.width() / 2, _midRightControlRect.height() / 2);ctrlPainter.drawRoundedRect(_midUpControlRect, _midUpControlRect.width() / 2, _midUpControlRect.height() / 2);}}QWidget::paintEvent(event);
}void ScreenshotToolWidget::initMenuWidget()
{_pScreenshotToolOperatioWidget = new ScreenshotToolOperatioWidget(this);assert(0 != _pScreenshotToolOperatioWidget);// 创建简单的截图操作按钮，此处为了方便管理将操作按钮和截图操作分开创建_pScreenshotToolOperatioWidget->resize(342 * Common::instance()->getHorizontalRatio(),90 * Common::instance()->getVerticalRatio());_pScreenshotToolOperatioWidget->setVisible(false);_isCut = false;connect(_pScreenshotToolOperatioWidget, &ScreenshotToolOperatioWidget::signal_closeCutImage,this, &ScreenshotToolWidget::slot_cancelScreenshotToolWidget);connect(_pScreenshotToolOperatioWidget, &ScreenshotToolOperatioWidget::signal_sendCutImage,this, &ScreenshotToolWidget::slot_sendCutImage);
}void ScreenshotToolWidget::mouseMoveEvent(QMouseEvent *event)
{if (event->buttons() & Qt::LeftButton && _mousePressed){if (_scaleType == ScreenshotToolWidget::SCALE_TYPE_NOSCALE){moveTargetArea(event->pos() - _lastMousePos);_lastMousePos = event->pos();}else{scaleTargetArea(_scaleType, event->pos());}update();event->accept();}// 设置鼠标形状setCursor(Qt::ArrowCursor);QPoint mousePos = event->pos();if(_pScreenshotToolOperatioWidget->geometry().contains(mousePos)){setCursor(Qt::ArrowCursor);}else if (_targetRect.contains(mousePos)){setCursor(Qt::SizeAllCursor);}if (_leftTopControlRect.contains(mousePos)){setCursor(Qt::SizeFDiagCursor);}else if(_rightBottomControlRect.contains(mousePos)){setCursor(Qt::SizeFDiagCursor);}else if(_rightTopControlRect.contains(mousePos)){setCursor(Qt::SizeBDiagCursor);}else if(_leftBottomControlRect.contains(mousePos)){setCursor(Qt::SizeBDiagCursor);}else if(_midBelowControlRect.contains(mousePos)){setCursor(Qt::SizeVerCursor);}else if(_midLeftControlRect.contains(mousePos)){setCursor(Qt::SizeHorCursor);}else if(_midRightControlRect.contains(mousePos)){setCursor(Qt::SizeHorCursor);}else if(_midUpControlRect.contains(mousePos)){setCursor(Qt::SizeVerCursor);}
}void ScreenshotToolWidget::mousePressEvent(QMouseEvent *event)
{if (event->button() == Qt::LeftButton){_lastMousePos = event->pos();_mousePressed = true;_scaleType = SCALE_TYPE_NOSCALE;// 如果在控制点QPoint pressedPos = event->pos();if (_leftTopControlRect.contains(pressedPos)){setCursor(Qt::SizeFDiagCursor);_scaleType = SCALE_TYPE_LEFTTOP;}else if(_rightBottomControlRect.contains(pressedPos)){_scaleType = SCALE_TYPE_RIGHTBOTTOM;}else if(_rightTopControlRect.contains(pressedPos)){_scaleType = SCALE_TYPE_RIGTHTOP;}else if(_leftBottomControlRect.contains(pressedPos)){_scaleType = SCALE_TYPE_LEFTBOTTOM;}else if(_midBelowControlRect.contains(pressedPos)){setCursor(Qt::SizeVerCursor);_scaleType = SCALE_TYPE_MIDBELLOW;}else if(_midLeftControlRect.contains(pressedPos)){setCursor(Qt::SizeHorCursor);_scaleType = SCALE_TYPE_MIDLEFT;}else if(_midRightControlRect.contains(pressedPos)){setCursor(Qt::SizeHorCursor);_scaleType = SCALE_TYPE_MIDRIGHT;}else if(_midUpControlRect.contains(pressedPos)){setCursor(Qt::SizeVerCursor);_scaleType = SCALE_TYPE_MIDUP;}event->accept();}
}void ScreenshotToolWidget::mouseReleaseEvent(QMouseEvent *event)
{if (event->button() == Qt::LeftButton){_mousePressed = false;_targetImage = _pImageBuffer->copy(_targetRect);event->accept();}
}void ScreenshotToolWidget::moveTargetArea(QPoint movePos)
{QRect newRect = _targetRect;newRect.moveTo(_targetRect.topLeft() + movePos);if(newRect.topLeft() == QPoint(0,0)|| newRect.topLeft().x() < 0|| newRect.topLeft().y() < 0|| newRect.bottomLeft().y() > Common::instance()->getScreenHeight()|| newRect.topRight().x() > Common::instance()->getScreenWidth()|| newRect.topRight().y()<0){return;}_targetRect.moveTo(_targetRect.topLeft() + movePos);setControlPoint();changeMenuPos();
}void ScreenshotToolWidget::setImage(QImage image)
{if(_pImageBuffer != Q_NULLPTR){delete _pImageBuffer;_pImageBuffer = Q_NULLPTR;}_pImageBuffer = new QImage(image);assert(0 != _pImageBuffer);this->resize(image.size());// 设置目标区域_targetRect.setSize(QSize(650 * Common::instance()->getHorizontalRatio(), 450 * Common::instance()->getVerticalRatio()));_targetRect.moveTo((this->width() - _targetRect.width()) / 2, (this->height() - _targetRect.height()) / 2);_targetImage = _pImageBuffer->copy(_targetRect);// 设置控制点setControlPoint();changeMenuPos();_pScreenshotToolOperatioWidget->setVisible(true);update();
}void ScreenshotToolWidget::setIscut(bool isCut)
{_isCut = isCut;
}void ScreenshotToolWidget::slot_cancelScreenshotToolWidget()
{emit signal_cancelScreenshotToolWidget(_pImageFullName);_targetRect = QRect(this->rect());_targetImage = _pImageBuffer->copy(_targetRect);this->close();
}void ScreenshotToolWidget::slot_sendCutImage()
{if(this->isVisible()){_isCut = true;this->repaint();QString dirStr = QString("%1").arg(_pImagePath);QDir dir(dirStr);if (!dir.exists()){dir.mkpath(dirStr);}QString imagefilePath = QString("%1%2").arg(_pImagePath).arg(_pImageFullName);QByteArray extension=_pImageExtension.toLatin1();char * imgExtension = extension.data();QPixmap::fromImage(_targetImage).save(imagefilePath, imgExtension, 100);emit signal_sendPrintScreenWidget(_pImageFullName);_targetRect = QRect(this->rect());_targetImage = _pImageBuffer->copy(_targetRect);this->close();}
}void ScreenshotToolWidget::scaleTargetArea(ScreenshotToolWidget::SCALE_TYPE type, QPoint point)
{switch (type){case ScreenshotToolWidget::SCALE_TYPE_LEFTTOP:if(point.x() < _targetRect.right() - 50  *  Common::instance()->getHorizontalRatio()&& point.y() < _targetRect.bottom() - 50  *  Common::instance()->getVerticalRatio()){_targetRect.setTopLeft(point);}break;case ScreenshotToolWidget::SCALE_TYPE_LEFTBOTTOM:if (point.x() < _targetRect.right() - 50  *  Common::instance()->getHorizontalRatio()&& point.y() > _targetRect.top() + 50  *  Common::instance()->getVerticalRatio()){if(point.y() > Common::instance()->getScreenHeight()){_targetRect.setBottomLeft(QPoint(point.x(),Common::instance()->getScreenHeight()));}else{_targetRect.setBottomLeft(point);}}break;case ScreenshotToolWidget::SCALE_TYPE_RIGTHTOP:if (point.x() > _targetRect.left() + 50  *  Common::instance()->getHorizontalRatio()&& point.y() < _targetRect.bottom() - 50  *  Common::instance()->getVerticalRatio()){_targetRect.setTopRight(point);}break;case ScreenshotToolWidget::SCALE_TYPE_RIGHTBOTTOM:if(_targetRect.width()>=50  *  Common::instance()->getHorizontalRatio()&& point.x() >=_targetRect.left()+50  *  Common::instance()->getHorizontalRatio()&& _targetRect.height()>200  *  Common::instance()->getVerticalRatio()&& point.y()>_targetRect.top()+50  *  Common::instance()->getVerticalRatio()){if(point.y() > Common::instance()->getScreenHeight()){_targetRect.setBottomRight(QPoint(point.x(),Common::instance()->getScreenHeight()));}else{_targetRect.setBottomRight(point);}}break;case ScreenshotToolWidget::SCALE_TYPE_MIDBELLOW:if(_targetRect.height() > 50 * Common::instance()->getVerticalRatio()&& point.y()>_targetRect.top() + 50 * Common::instance()->getVerticalRatio()){if(point.y() > Common::instance()->getScreenHeight()){_targetRect.setBottomLeft(QPoint(_targetRect.bottomLeft().x(),Common::instance()->getScreenHeight()));_targetRect.setBottomRight(QPoint(_targetRect.bottomRight().x(),Common::instance()->getScreenHeight()));}else{_targetRect.setBottomLeft(QPoint(_targetRect.bottomLeft().x(),point.y()));_targetRect.setBottomRight(QPoint(_targetRect.bottomRight().x(),point.y()));}}break;case ScreenshotToolWidget::SCALE_TYPE_MIDUP:if(_targetRect.height() >= 50 * Common::instance()->getVerticalRatio()&& point.y() <= _targetRect.bottom() - 50 * Common::instance()->getVerticalRatio()){_targetRect.setTopLeft(QPoint(_targetRect.topLeft().x(), point.y()));_targetRect.setTopRight(QPoint(_targetRect.topRight().x(), point.y()));}break;case ScreenshotToolWidget::SCALE_TYPE_MIDLEFT:if(_targetRect.width() >= 50 * Common::instance()->getHorizontalRatio()&& point.x()<=_targetRect.right() - 50 * Common::instance()->getHorizontalRatio()){_targetRect.setTopLeft(QPoint(point.x(),_targetRect.topLeft().y()));if(point.y() > Common::instance()->getScreenHeight()){_targetRect.setBottomLeft(QPoint(point.x(),Common::instance()->getScreenHeight()));}else{_targetRect.setBottomLeft(QPoint(point.x(),_targetRect.bottomLeft().y()));}}break;case ScreenshotToolWidget::SCALE_TYPE_MIDRIGHT:if(_targetRect.width() >= 50 * Common::instance()->getHorizontalRatio()&& point.x() >= _targetRect.left() + 50 * Common::instance()->getHorizontalRatio()){_targetRect.setTopRight(QPoint(point.x(),_targetRect.topRight().y()));if(point.y() > Common::instance()->getScreenHeight()){_targetRect.setBottomRight(QPoint(point.x(),Common::instance()->getScreenHeight()));}else{_targetRect.setBottomRight(QPoint(point.x(),_targetRect.bottomRight().y()));}}break;default:break;}setControlPoint();changeMenuPos();}void ScreenshotToolWidget::changeMenuPos()
{int x;int y;if(_targetRect.height() >= _pScreenshotToolOperatioWidget->height() && _targetRect.width() >= _pScreenshotToolOperatioWidget->width()){if(_targetRect.bottom() < (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() + 20 * Common::instance()->getVerticalRatio();}else{x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();}}else if(_targetRect.height() < _pScreenshotToolOperatioWidget->height()&& _targetRect.width() < _pScreenshotToolOperatioWidget->width()){if(_targetRect.bottom() > (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() + 20 * Common::instance()->getHorizontalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();if(_targetRect.right() > (Common::instance()->getScreenWidth() - _pScreenshotToolOperatioWidget->width()- 20 * Common::instance()->getHorizontalRatio())){x = _targetRect.left() - _pScreenshotToolOperatioWidget->width() - 20 * Common::instance()->getVerticalRatio();}}else if( _targetRect.bottom() < (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() + 20 * Common::instance()->getVerticalRatio();if(x < 0){x = _targetRect.right() + 20 * Common::instance()->getVerticalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();}}}else if(_targetRect.height() < _pScreenshotToolOperatioWidget->height()&& _targetRect.width() > _pScreenshotToolOperatioWidget->width()){if(_targetRect.bottom() > (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.top() - _pScreenshotToolOperatioWidget->height();}else if( _targetRect.bottom() < (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() + 20 * Common::instance()->getVerticalRatio();}}else if(_targetRect.height() >= _pScreenshotToolOperatioWidget->height()&& _targetRect.width() < _pScreenshotToolOperatioWidget->width()){if(_targetRect.top() < _pScreenshotToolOperatioWidget->height() + 20 * Common::instance()->getVerticalRatio()&&  _targetRect.bottom() > (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() + 20 * Common::instance()->getVerticalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();if(_targetRect.right() > (Common::instance()->getScreenWidth() - _pScreenshotToolOperatioWidget->width()- 20 * Common::instance()->getHorizontalRatio())){x = _targetRect.left() - _pScreenshotToolOperatioWidget->width() - 20 * Common::instance()->getVerticalRatio();}}else if(_targetRect.top() > _pScreenshotToolOperatioWidget->height() + 20 * Common::instance()->getVerticalRatio()&&  _targetRect.bottom() > (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() + 20 * Common::instance()->getHorizontalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();if(_targetRect.right() > (Common::instance()->getScreenWidth() - _pScreenshotToolOperatioWidget->width()- 20 * Common::instance()->getHorizontalRatio())){x = _targetRect.left() - _pScreenshotToolOperatioWidget->width() - 20 * Common::instance()->getHorizontalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();}}else if(_targetRect.top() > _pScreenshotToolOperatioWidget->height() + 20 * Common::instance()->getVerticalRatio()&&  _targetRect.bottom() < (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() + 20 * Common::instance()->getVerticalRatio();if(x < 0){x = _targetRect.right() + 20 * Common::instance()->getVerticalRatio();y = _targetRect.bottom() - _pScreenshotToolOperatioWidget->height();}}else if(_targetRect.top() < _pScreenshotToolOperatioWidget->height() + 20 * Common::instance()->getVerticalRatio()&&  _targetRect.bottom() < (Common::instance()->getScreenHeight() - _pScreenshotToolOperatioWidget->height()- 20 * Common::instance()->getVerticalRatio())){x = _targetRect.right() - _pScreenshotToolOperatioWidget->width();y = _targetRect.bottom() + 20 * Common::instance()->getVerticalRatio();if(x < 0){x = _targetRect.right() + 20 * Common::instance()->getHorizontalRatio();}}}_pScreenshotToolOperatioWidget->move(x, y);
}void ScreenshotToolWidget::setControlPoint()
{_leftTopControlRect = QRect(_targetRect.topLeft() - QPoint(11  *  Common::instance()->getHorizontalRatio(),11  *  Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_leftBottomControlRect = QRect(_targetRect.bottomLeft() - QPoint(11  *  Common::instance()->getHorizontalRatio(),11  *  Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_rightBottomControlRect= QRect(_targetRect.bottomRight() - QPoint(9  *  Common::instance()->getHorizontalRatio(),11  *  Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_rightTopControlRect = QRect(_targetRect.topRight() - QPoint(9  *  Common::instance()->getHorizontalRatio(),11  *  Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_midLeftControlRect = QRect(_targetRect.topLeft() + QPoint(-11  *  Common::instance()->getHorizontalRatio(),(_targetRect.height() / 2) - 5 * Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_midBelowControlRect = QRect(_targetRect.topLeft() + QPoint((_targetRect.width() / 2 - 10 * Common::instance()->getVerticalRatio()),(_targetRect.height() - 11 * Common::instance()->getVerticalRatio())),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_midRightControlRect = QRect(_targetRect.bottomRight() + QPoint(-8  *  Common::instance()->getHorizontalRatio(),(-_targetRect.height() / 2 - 5 * Common::instance()->getVerticalRatio())),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));_midUpControlRect = QRect(_targetRect.topLeft() + QPoint((_targetRect.width()/2) - 10 * Common::instance()->getVerticalRatio(),- 11  *  Common::instance()->getVerticalRatio()),QSize(20  *  Common::instance()->getHorizontalRatio(),20  *  Common::instance()->getVerticalRatio()));
}void ScreenshotToolWidget::resizeEvent(QResizeEvent  * event)
{if (!_pImageBuffer->isNull()){*_pImageBuffer = _pImageBuffer->scaled(this->size());}QWidget::resizeEvent(event);
}ScreenshotToolWidget::~ScreenshotToolWidget()
{if(!_pImageBuffer->isNull()){delete _pImageBuffer;}
}

截取的操作按钮较为简单就不多做描述了，至此就简单的截图工具就完成了

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！