300 lines
13 KiB
C++
300 lines
13 KiB
C++
#include "screenshotwidget.h"
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ScreenShotWidget::ScreenShotWidget(QWidget *parent) :
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QWidget(parent)
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{
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//初始化截图激活标志
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m_screenshot_active=false;
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//设置窗口，无边框，顶部显示
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setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
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setWindowModality(Qt::ApplicationModal);
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//窗口背景为透明
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setAttribute(Qt::WA_TranslucentBackground);
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//设置窗口跟踪鼠标移动事件
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setMouseTracking(true);
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//设置保存、取消按钮以及长宽label并暂时隐藏
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buttonSave=new QPushButton(this);
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buttonSave->setParent(this);
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buttonSave->setFixedSize(35,30);
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buttonSave->setText("ok");
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buttonSave->setStyleSheet("QPushButton {font-size:16pt; color:green; font-weight:800;}");
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buttonSave->setVisible(false);
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buttonCancel=new QPushButton(this);
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buttonCancel->setParent(this);
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buttonCancel->setFixedSize(35,30);
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buttonCancel->setText("x");
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buttonCancel->setStyleSheet("QPushButton {font-size:20pt; color:red;font-weight:100;}");
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buttonCancel->setVisible(false);
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lblHeightWidth=new QLabel(this);
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lblHeightWidth->setParent(this);
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lblHeightWidth->setFixedSize(100,10);
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lblHeightWidth->setStyleSheet("QLabel {color:white;}");
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lblHeightWidth->setVisible(false);
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//设置放大镜
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lblMagnifyGlass=new QLabel(this);
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lblMagnifyGlass->setParent(this);
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lblMagnifyGlass->setFixedSize(100,100);
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lblMagnifyGlass->setVisible(true);
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lblMagnifyGlass->setText("wo zai zhe");
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//设置鼠标光标模式为十字
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setCursor(Qt::CursorShape::CrossCursor);
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//连接按钮的信号槽
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connect(this->buttonSave,SIGNAL(clicked()),this,SLOT(on_buttonSave_Clicked()));
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connect(this->buttonCancel,SIGNAL(clicked()),this,SLOT(on_buttonCancel_Clicked()));
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}
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void ScreenShotWidget::mousePressEvent(QMouseEvent *event)
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{
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if(event->button()==Qt::LeftButton)
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{
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QRect rect(m_startPos,m_endPos);
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if((rect.contains(event->pos())||m_cursorMode!=0)&&m_startPos!=m_endPos){
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m_oldPos=event->pos();
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}
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else if(m_startPos==m_endPos){
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//记录鼠标点击的起始位置
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m_startPos = event->pos();
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//截图激活标志
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m_screenshot_active=true;
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}
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}
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else if(event->button()==Qt::RightButton)//重新截图
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{
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if(m_endPos.isNull())
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on_buttonCancel_Clicked();
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m_startPos=QPoint(0,0);
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m_endPos=QPoint(0,0);
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buttonSave->setVisible(false);
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buttonCancel->setVisible(false);
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lblHeightWidth->setVisible(false);
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setCursor(Qt::CursorShape::CrossCursor);
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update();
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}
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}
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void ScreenShotWidget::mouseMoveEvent(QMouseEvent *event)
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{
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QRect rect(m_startPos,m_endPos);
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QPoint point=getPointInWhichSqure(event->pos());
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//截图后不点击鼠标时的光标更新
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if(!m_screenshot_active && m_startPos!=m_endPos && !event->buttons()){
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if(point==m_topLeft) {setCursor(Qt::CursorShape::SizeFDiagCursor);m_cursorMode=1;}
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else if(point==m_topRight) {setCursor(Qt::CursorShape::SizeBDiagCursor);m_cursorMode=2;}
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else if(point==m_bottomLeft) {setCursor(Qt::CursorShape::SizeBDiagCursor);m_cursorMode=3;}
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else if(point==m_bottomRight) {setCursor(Qt::CursorShape::SizeFDiagCursor);m_cursorMode=4;}
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else if(point==m_topCenter) {setCursor(Qt::CursorShape::SizeVerCursor);m_cursorMode=5;}
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else if(point==m_bottomCenter) {setCursor(Qt::CursorShape::SizeVerCursor);m_cursorMode=6;}
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else if(point==m_leftCenter) {setCursor(Qt::CursorShape::SizeHorCursor);m_cursorMode=7;}
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else if(point==m_rightCenter) {setCursor(Qt::CursorShape::SizeHorCursor);m_cursorMode=8;}
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else if(rect.contains(event->pos())) {setCursor(Qt::CursorShape::ClosedHandCursor);m_cursorMode=9;}
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else {setCursor(Qt::CursorShape::ArrowCursor);m_cursorMode=0;}
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}
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//鼠标左键按下
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if(event->buttons() & Qt::LeftButton)
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{
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//截图中位置更新
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if(m_screenshot_active){
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m_endPos = event->pos();
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}
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//拖动已截图区域
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if(rect.contains(event->pos()) && !m_screenshot_active &&cursor().shape()==Qt::ClosedHandCursor){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos=m_startPos+m_distancePos;
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m_endPos=m_endPos+m_distancePos;
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//边界条件限制
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if(m_startPos.x()<=0){m_startPos.rx()=0;m_endPos.rx()=m_endPos.x()-m_distancePos.x();}
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if(m_startPos.y()<=0){m_startPos.ry()=0;m_endPos.ry()=m_endPos.y()-m_distancePos.y();}
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if(m_endPos.x()>=this->width()){m_endPos.rx()=this->width();m_startPos.rx()=m_startPos.x()-m_distancePos.x();}
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if(m_endPos.y()>=this->height()){m_endPos.ry()=this->height();m_startPos.ry()=m_startPos.y()-m_distancePos.y();}
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}
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else if(cursor().shape()==Qt::SizeFDiagCursor)
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{
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if(m_cursorMode==1){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos=m_startPos+m_distancePos;
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}
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if(m_cursorMode==4){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_endPos=m_endPos+m_distancePos;
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}
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}
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else if(cursor().shape()==Qt::SizeBDiagCursor)
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{
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if(m_cursorMode==2){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos.ry()=m_startPos.y()+m_distancePos.y();
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m_endPos.rx()=m_endPos.x()+m_distancePos.x();
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}
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if(m_cursorMode==3){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos.rx()=m_startPos.x()+m_distancePos.x();
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m_endPos.ry()=m_endPos.y()+m_distancePos.y();
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}
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}
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else if(cursor().shape()==Qt::SizeHorCursor)
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{
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if(m_cursorMode==7){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos.rx()=m_startPos.x()+m_distancePos.x();
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}
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if(m_cursorMode==8){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_endPos.rx()=m_endPos.x()+m_distancePos.x();
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}
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}
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else if(cursor().shape()==Qt::SizeVerCursor)
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{
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if(m_cursorMode==5){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_startPos.ry()=m_startPos.y()+m_distancePos.y();
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}
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if(m_cursorMode==6){
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m_distancePos=event->pos()-m_oldPos;
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m_oldPos=event->pos();
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m_endPos.ry()=m_endPos.y()+m_distancePos.y();
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}
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}
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update();
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}
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}
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void ScreenShotWidget::mouseReleaseEvent(QMouseEvent *event)
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{
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Q_UNUSED(event);
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if (m_screenshot_active) {
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m_screenshot_active=false;
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if (m_endPos != m_startPos) {
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//弹出保存/取消按钮
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buttonSave->setVisible(true);
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buttonCancel->setVisible(true);
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}
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}
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}
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void ScreenShotWidget::paintEvent(QPaintEvent *event)
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{
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Q_UNUSED(event);
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QPainter painter(this);
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painter.fillRect(rect(),QColor(128,128,128,128));
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QColor color(11,218,81);
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QPen pen(color,1,Qt::SolidLine);
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painter.setPen(pen);
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//边界条件限制
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if(m_startPos.x()>=m_endPos.x())m_endPos.rx()=m_startPos.x();
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if(m_startPos.y()>=m_endPos.y())m_endPos.ry()=m_startPos.y();
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//画矩形,并将内部置为透明
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QRect rect(m_startPos, m_endPos);
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painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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painter.fillRect(rect,QColor(0,0,0,0));
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painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
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painter.drawRect(rect.normalized());
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// 获取矩形的四个顶点和四条边的中点
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m_topLeft=QPoint(rect.left(),rect.top());
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m_topRight=QPoint(rect.right()+1,rect.top());
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m_bottomLeft=QPoint(rect.left(),rect.bottom()+1);
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m_bottomRight=QPoint(rect.right()+1,rect.bottom()+1);
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m_topCenter=QPoint(rect.center().x(), rect.top());
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m_bottomCenter=QPoint(rect.center().x(), rect.bottom()+1);
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m_leftCenter=QPoint(rect.left(), rect.center().y());
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m_rightCenter=QPoint(rect.right()+1, rect.center().y()+1);
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// 定义一个小矩形的大小，用来画实心点
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int pointSize = 5;
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QRect pointRect(0, 0, pointSize, pointSize);
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// 在每个点的位置画一个小矩形，作为实心点
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pointRect.moveCenter(m_topLeft);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_topRight);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_bottomLeft);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_bottomRight);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_topCenter);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_bottomCenter);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_leftCenter);
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painter.fillRect(pointRect, color);
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pointRect.moveCenter(m_rightCenter);
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painter.fillRect(pointRect, color);
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//显示放大镜
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if(cursor().shape()!=Qt::ClosedHandCursor)
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{
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QRect cursorRect(QCursor::pos().x()-25,QCursor::pos().y()-25,51,51);
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QScreen *screen=QGuiApplication::primaryScreen();
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QPixmap cursorPixmap=screen->grabWindow(QApplication::desktop()->winId(),cursorRect.x(),cursorRect.y(),cursorRect.width(),cursorRect.height());
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cursorPixmap=cursorPixmap.scaled(cursorPixmap.width()*2,cursorPixmap.height()*2,Qt::KeepAspectRatio);
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QPoint startPoint(QCursor::pos().x()+26,QCursor::pos().y()+26);
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painter.drawPixmap(startPoint.x(),startPoint.y(),cursorPixmap.width(),cursorPixmap.height(),cursorPixmap);
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painter.drawRect(startPoint.x(),startPoint.y(),cursorPixmap.width(),cursorPixmap.height());
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QPen pen2(color,2,Qt::SolidLine);
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painter.setPen(pen2);
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painter.drawLine(startPoint.x(),startPoint.y()+cursorPixmap.height()/2+1,startPoint.x()+cursorPixmap.width(),startPoint.y()+cursorPixmap.height()/2+1);
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painter.drawLine(startPoint.x()+cursorPixmap.width()/2+1,startPoint.y(),startPoint.x()+cursorPixmap.width()/2+1,startPoint.y()+cursorPixmap.height());
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}
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update();
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//显示按钮与标签
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if(this->height()<m_endPos.y()+30){
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buttonSave->move(rect.x()+rect.width()-buttonSave->width()-10,rect.y()+rect.height()-30);
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buttonCancel->move(rect.x()+rect.width()-buttonSave->width()-buttonCancel->width()-8,rect.y()+rect.height()-30);
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}
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else{
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buttonSave->move(rect.x()+rect.width()-buttonSave->width()-10,rect.y()+rect.height());
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buttonCancel->move(rect.x()+rect.width()-buttonSave->width()-buttonCancel->width()-8,rect.y()+rect.height());
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}
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lblHeightWidth->setVisible(true);
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lblHeightWidth->move(rect.x(),rect.y()-12);
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lblHeightWidth->setText(QString::number(rect.width())+"x"+QString::number(rect.height()));
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}
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void ScreenShotWidget::on_buttonSave_Clicked()
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{
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//清除笔刷,创建一个矩形区域
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close();
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QThread::msleep(30);
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QRect rect = QRect(m_startPos, m_endPos);
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emit(rect_selected(rect));
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//获取存储路径
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QDateTime currentDate=QDateTime::currentDateTime();
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QString mCURDIr = QCoreApplication::applicationDirPath();
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QString filePath=mCURDIr + "/screenshot/"+currentDate.toString("MMdd_hhmmss")+".bmp";
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QDir dir;
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if(!dir.exists(mCURDIr + "/screenshot")) dir.mkdir(mCURDIr + "/screenshot");
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//获取矩形区域截图(减去笔刷)，存储在pixmap中
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QScreen *screen=QGuiApplication::primaryScreen();
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QPixmap pixmap=screen->grabWindow(QApplication::desktop()->winId(),rect.x(),rect.y(),rect.width(),rect.height());
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if (!pixmap.save(filePath)) QMessageBox::warning(this, tr("提示"), tr("保存图片失败"));
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}
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void ScreenShotWidget::on_buttonCancel_Clicked()
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{
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//关闭透明页面
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close();
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}
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QPoint ScreenShotWidget::getPointInWhichSqure(QPoint point)
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{
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int distance=8;
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if(abs(point.x()-m_topLeft.x())+abs(point.y()-m_topLeft.y())<distance) return m_topLeft;
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else if(abs(point.x()-m_topRight.x())+abs(point.y()-m_topRight.y())<distance) return m_topRight;
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else if(abs(point.x()-m_bottomLeft.x())+abs(point.y()-m_bottomLeft.y())<distance) return m_bottomLeft;
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else if(abs(point.x()-m_bottomRight.x())+abs(point.y()-m_bottomRight.y())<distance) return m_bottomRight;
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else if(abs(point.x()-m_topCenter.x())+abs(point.y()-m_topCenter.y())<distance) return m_topCenter;
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else if(abs(point.x()-m_bottomCenter.x())+abs(point.y()-m_bottomCenter.y())<distance) return m_bottomCenter;
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else if(abs(point.x()-m_leftCenter.x())+abs(point.y()-m_leftCenter.y())<distance) return m_leftCenter;
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else if(abs(point.x()-m_rightCenter.x())+abs(point.y()-m_rightCenter.y())<distance) return m_rightCenter;
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else return QPoint(-1,-1);
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}
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