前面介绍了一种裁剪框的实现方案详见Qt实现截图之二 ，本节再介绍一种实现方案。
分层依旧两层，改变的是裁剪层，差别在于只需要一个裁剪窗口也就是去掉前面的top，right， left，bottom，只留下mid窗体用于高亮显示裁剪区域。
布局如下：
void MaskFrameBase::setup()
{
this->setMouseTracking(true);
// this->setObjectName("shtcenterframe");
this->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
this->captureArea = new QFrame(this);
this->captureArea->installEventFilter(this);
this->captureArea->setObjectName("captureareaframe");
this->captureArea->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
this->captureArea->setMouseTracking(true);
createBtnFrame();
bSetupView = true;
adjustCaptureArea();
this->captureArea->resize(0, 0);
this->captureArea->setVisible(false);
}
1.绘制裁剪框
首先计算一下边框绘制的区域
void MaskFrameBase::calRect()
{
leftTopRect = QRect(edgeMargin, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
topRect = QRect((this->captureArea->width() - _rect_border_size.width()) * 0.5, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
rigtTopRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
rightRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5, _rect_border_size.width(), _rect_border_size.height());
rightBottomRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
bottomRect = QRect((this->captureArea->width() - _rect_border_size.width()) * 0.5, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
leftBottomRect = QRect(edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
leftRect = QRect(edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5, _rect_border_size.width(), _rect_border_size.height());
centerRect = QRect(_rect_border_size.width() * 0.5 + edgeMargin, _rect_border_size.height() * 0.5 + edgeMargin, this->captureArea->width() - _rect_border_size.width() - edgeMargin * 2, this->captureArea->height() - _rect_border_size.height()- edgeMargin*2);
}
绘制跟之前一样
bool MaskFrameBase::eventFilter(QObject *obj, QEvent *event)
{
if(obj == this->captureArea)
{
if(event->type() == QEvent::Paint)
{
QPainter painter(captureArea);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setPen(QPen(QColor(0xFC, 0xC9, 0x01), lineWidth, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin)); //设置画笔形式
//画矩形
calRect();
QPainterPath path;
path.addEllipse(leftRect.left(), leftRect.top(), leftRect.width(), leftRect.width());
path.addEllipse(topRect.left(), topRect.top(), topRect.width(), topRect.width());
path.addEllipse(rigtTopRect.left(), rigtTopRect.top(), rigtTopRect.width(), rigtTopRect.width());
path.addEllipse(rightRect.left(), rightRect.top(), rightRect.width(), rightRect.width());
path.addEllipse(rightBottomRect.left(), rightBottomRect.top(), rightBottomRect.width(), rightBottomRect.width());
path.addEllipse(bottomRect.left(), bottomRect.top(), bottomRect.width(), bottomRect.width());
path.addEllipse(leftBottomRect.left(), leftBottomRect.top(), leftBottomRect.width(), leftBottomRect.width());
path.addEllipse(leftTopRect.left(), leftTopRect.top(), leftTopRect.width(), leftTopRect.width());
painter.setBrush(Qt::white);
painter.drawPath(path);
//划线
painter.drawLine(QLine(QPoint(_rect_border_size.width() + edgeMargin, _rect_border_size.height() * 0.5 + edgeMargin), QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 - 1, _rect_border_size.height() * 0.5 + edgeMargin)));
painter.drawLine(QLine(QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 + _rect_border_size.width(), _rect_border_size.height() * 0.5 + edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() - edgeMargin - 1, _rect_border_size.height() * 0.5 + edgeMargin)));
painter.drawLine(QLine(QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, _rect_border_size.height() + edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 - 1)));
painter.drawLine(QLine(QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 + _rect_border_size.height()), QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin - 1)));
painter.drawLine(QLine(QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 + _rect_border_size.width(), this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() - edgeMargin - 1, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() + edgeMargin, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin), QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 - 1, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() * 0.5 + edgeMargin, _rect_border_size.height() + edgeMargin), QPoint(_rect_border_size.width() * 0.5 + edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 - 1)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() * 0.5 + edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 + _rect_border_size.height()), QPoint(_rect_border_size.width() * 0.5 + edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin - 1)));
}
}
return QFrame::eventFilter(obj, event);
}
2.重载父窗口paintEvent
重载这个事件是为了绘制非裁减区域，绘制层半透明，首先要判断一下裁剪区域是否显示且有效，无效则全屏绘制成半透明，代码如下：
void MaskFrameBase::paintEvent(QPaintEvent *)
{
QPainter painter(this);
if(this->captureArea->isVisible() && captureAreaValide())
{
//左边区域
painter.fillRect(QRect(0, this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin,
this->captureArea->pos().x()+_rect_border_size.width() * 0.5+edgeMargin ,
this->captureArea->height()-_rect_border_size.height()-edgeMargin*2),
QBrush(QColor(0, 0, 0,128)));
//上边区域
painter.fillRect(QRect(0, 0, width(), this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin),
QBrush(QColor(0, 0, 0,128)));
//右边区域
painter.fillRect(QRect(this->captureArea->geometry().right()-edgeMargin-_rect_border_size.width() * 0.5,
this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin,
width()-this->captureArea->geometry().right()+_rect_border_size.width() * 0.5+edgeMargin,
this->captureArea->height()-_rect_border_size.height()-edgeMargin*2),
QBrush(QColor(0, 0, 0,128)));
//下边区域
painter.fillRect(QRect(0,
this->captureArea->geometry().top()+this->captureArea->height()-_rect_border_size.height() * 0.5-edgeMargin,
width(),
height()-this->captureArea->geometry().bottom()+_rect_border_size.height()*0.5+edgeMargin),
QBrush(QColor(0, 0, 0,128)));
//透明区域
QRect rect;
rect.setX(this->captureArea->pos().x()+_rect_border_size.width()*0.5+edgeMargin);
rect.setY(this->captureArea->pos().y()+_rect_border_size.height()*0.5 +edgeMargin);
rect.setWidth(this->captureArea->width()-_rect_border_size.width()-edgeMargin*2);
rect.setHeight(this->captureArea->height()-_rect_border_size.height()-edgeMargin*2);
#ifdef Q_OS_WIN
painter.fillRect(rect, QBrush(QColor(0, 0, 0, 1)));
#else
painter.fillRect(rect, QBrush(QColor(0, 0, 0, 20)));
#endif
}
else
{
painter.fillRect(rect(), QBrush(QColor(0, 0, 0, 128)));
}
}
3.效果
效果跟方案一是一样的：
完整代码：
#include "maskframebase.h"
#include "remixhelp.h"
#include <QFrame>
#include <QLabel>
#include <QMouseEvent>
#include <QToolButton>
#include <QHBoxLayout>
#include <QApplication>
#include <QDesktopWidget>
#include <QDebug>
#include <QPainter>
#include <QPushButton>
#define SNAP_BTN_SAVE "snapsavebtn"
#define SNAP_BTN_CANCEL "snapcancelbtn"
#define SNAP_BTN_SEND "snapsendbtn"
MaskFrameBase::MaskFrameBase(QWidget* parent):QFrame(parent),captureArea(NULL),
btnFrame(NULL),bSetupView(false),pressPoint(0,0),curmousePoint(0,0),
startPointCapture(0,0),endPointCapture(0,0),operateMode(SelectArea),
borderSide(LeftBorder),cornerSide(LeftTop),bLeftPressed(false),
_rect_border_size(dpiSize(12, 12)),edgeMargin(dpiWidth(4)), lineWidth(dpiWidth(3))
{
setFixedParas();
}
MaskFrameBase::~MaskFrameBase()
{
}
void MaskFrameBase::setFixedParas()
{
this->mScale = 1;
this->btnHeigh = 34*mScale;
this->btnFrameHeigh = dpiHeight(70);
this->btnFrameWidth = dpiWidth(220);
this->sizeTipFrameWidth = 80*mScale;
this->sizeTipFrameHeigh = 40*mScale;
this->captureBorderWidth = _rect_border_size.width()*0.5+edgeMargin+lineWidth;
this->borderEdgeWidth = 0;
this->maskColor = "rgba(0, 0, 0 , 178)";//70%透明度
}
void MaskFrameBase::setup()
{
this->setMouseTracking(true);
// this->setObjectName("shtcenterframe");
this->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
this->captureArea = new QFrame(this);
this->captureArea->installEventFilter(this);
this->captureArea->setObjectName("captureareaframe");
this->captureArea->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
this->captureArea->setMouseTracking(true);
createBtnFrame();
bSetupView = true;
adjustCaptureArea();
this->captureArea->resize(0, 0);
this->captureArea->setVisible(false);
}
void MaskFrameBase::showMask()
{
this->show();
this->setCursor(Qt::CrossCursor);
this->raise();
}
void MaskFrameBase::reset()
{
this->pressPoint = QPoint(0,0);
this->curmousePoint = QPoint(0,0);
this->startPointCapture = QPoint(0,0);
this->endPointCapture = QPoint(0,0);
this->startPointCaptureMark = QPoint(0,0);//按下鼠标瞬间的截屏区域
this->endPointCaptureMark = QPoint(0,0);
this->operateMode = SelectArea;
this->borderSide = LeftBorder;
this->cornerSide = LeftTop;
this->setCursor(Qt::CrossCursor);
this->bLeftPressed = false;
this->btnFrame->hide();
adjustCaptureArea();
this->hide();
}
void MaskFrameBase::resizeEvent(QResizeEvent* event)
{
QFrame::resizeEvent(event);
adjustCaptureArea();
}
void MaskFrameBase::mousePressEvent(QMouseEvent* event)
{
QFrame::mousePressEvent(event);
if(event->button() == Qt::RightButton)
{
if(event->type() == QEvent::MouseButtonPress)
{
//reset();
//cancelSelect();
//emit selectedSnap(QPoint(0,0),QPoint(0,0));
}
}
else if(event->button() == Qt::LeftButton)
{
this->pressPoint = event->pos();
this->bLeftPressed = true;
this->startPointCaptureMark = this->startPointCapture;//按下鼠标瞬间的截屏区域
this->endPointCaptureMark = this->endPointCapture;
//qDebug()<<"mousePressEvent:bLeftPressed"<<endl;
}
}
void MaskFrameBase::mouseMoveEvent(QMouseEvent *event)
{
QFrame::mouseMoveEvent(event);
this->curmousePoint = event->pos();
// static int index = 0;
// qDebug()<<"MaskFrameBase::mouseMoveEvent:"<<index<<endl;
// ++index;
restrictMouseMove(this->curmousePoint);
if(this->bLeftPressed)
{
this->btnFrame->hide();
if(updateCaptureRect())
{
adjustCaptureArea();
}
}
if(!this->bLeftPressed){
judgeOperateState(this->curmousePoint);
}
}
void MaskFrameBase::restrictMouseMove(QPoint& pt)
{
//qDebug()<<"MaskFrameBase::restrictMouseMove:x:"<<pt.x()<<",y:"<<pt.y()<<endl;
bool outbounds = false;
if(pt.x() <= 0){
pt.setX(0);
outbounds = true;
//qDebug()<<"MaskFrameBase::restrictMouseMove:left"<<endl;
}
if(pt.x() >= this->width()){
pt.setX(this->width());
outbounds = true;
//qDebug()<<"MaskFrameBase::restrictMouseMove:right"<<endl;
}
if(pt.y() <= 0){
pt.setY(0);
outbounds = true;
//qDebug()<<"MaskFrameBase::restrictMouseMove:top"<<endl;
}
if(pt.y() >= this->height()){
pt.setY(this->height());
outbounds = true;
//qDebug()<<"MaskFrameBase::restrictMouseMove:bottom"<<endl;
}
if(outbounds){
//固定一下鼠标
QApplication::desktop()->cursor().setPos(this->mapToGlobal(pt));
}
}
void MaskFrameBase::mouseReleaseEvent(QMouseEvent *event)
{
QFrame::mouseReleaseEvent(event);
//qDebug()<<"MaskFrameBase::mouseReleaseEvent"<<endl;
if(event->button() == Qt::LeftButton)
{
//qDebug()<<"MaskFrameBase::mouseReleaseEvent LeftButton"<<endl;
this->bLeftPressed = false;
this->curmousePoint = event->pos();
//只点击一下的情况
if(qAbs(this->curmousePoint.x()-this->pressPoint.x())<=this->captureBorderWidth &&
qAbs(this->curmousePoint.y()-pressPoint.y())<=this->captureBorderWidth &&
(this->operateMode==SelectArea || this->operateMode==Normal)){
showBtnFrame();
return;
}
adjustCaptureArea();
showBtnFrame();
}
}
void MaskFrameBase::enterEvent(QEvent *e)
{
QFrame::enterEvent(e);
}
void MaskFrameBase::leaveEvent(QEvent *e)
{
QFrame::leaveEvent(e);
}
void MaskFrameBase::calRect()
{
leftTopRect = QRect(edgeMargin, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
topRect = QRect((this->captureArea->width() - _rect_border_size.width()) * 0.5, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
rigtTopRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, edgeMargin, _rect_border_size.width(), _rect_border_size.height());
rightRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5, _rect_border_size.width(), _rect_border_size.height());
rightBottomRect = QRect(this->captureArea->width() - _rect_border_size.width() - edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
bottomRect = QRect((this->captureArea->width() - _rect_border_size.width()) * 0.5, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
leftBottomRect = QRect(edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin, _rect_border_size.width(), _rect_border_size.height());
leftRect = QRect(edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5, _rect_border_size.width(), _rect_border_size.height());
centerRect = QRect(_rect_border_size.width() * 0.5 + edgeMargin, _rect_border_size.height() * 0.5 + edgeMargin, this->captureArea->width() - _rect_border_size.width() - edgeMargin * 2, this->captureArea->height() - _rect_border_size.height()- edgeMargin*2);
}
bool MaskFrameBase::eventFilter(QObject *obj, QEvent *event)
{
if(obj == this->captureArea)
{
if(event->type() == QEvent::Paint)
{
QPainter painter(captureArea);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setPen(QPen(QColor(0xFC, 0xC9, 0x01), lineWidth, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin)); //设置画笔形式
//画矩形
calRect();
QPainterPath path;
path.addEllipse(leftRect.left(), leftRect.top(), leftRect.width(), leftRect.width());
path.addEllipse(topRect.left(), topRect.top(), topRect.width(), topRect.width());
path.addEllipse(rigtTopRect.left(), rigtTopRect.top(), rigtTopRect.width(), rigtTopRect.width());
path.addEllipse(rightRect.left(), rightRect.top(), rightRect.width(), rightRect.width());
path.addEllipse(rightBottomRect.left(), rightBottomRect.top(), rightBottomRect.width(), rightBottomRect.width());
path.addEllipse(bottomRect.left(), bottomRect.top(), bottomRect.width(), bottomRect.width());
path.addEllipse(leftBottomRect.left(), leftBottomRect.top(), leftBottomRect.width(), leftBottomRect.width());
path.addEllipse(leftTopRect.left(), leftTopRect.top(), leftTopRect.width(), leftTopRect.width());
painter.setBrush(Qt::white);
painter.drawPath(path);
//划线
painter.drawLine(QLine(QPoint(_rect_border_size.width() + edgeMargin, _rect_border_size.height() * 0.5 + edgeMargin), QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 - 1, _rect_border_size.height() * 0.5 + edgeMargin)));
painter.drawLine(QLine(QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 + _rect_border_size.width(), _rect_border_size.height() * 0.5 + edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() - edgeMargin - 1, _rect_border_size.height() * 0.5 + edgeMargin)));
painter.drawLine(QLine(QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, _rect_border_size.height() + edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 - 1)));
painter.drawLine(QLine(QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 + _rect_border_size.height()), QPoint(this->captureArea->width() - _rect_border_size.width() * 0.5 - edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin - 1)));
painter.drawLine(QLine(QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 + _rect_border_size.width(), this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin), QPoint(this->captureArea->width() - _rect_border_size.width() - edgeMargin - 1, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() + edgeMargin, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin), QPoint((this->captureArea->width() - _rect_border_size.width()) * 0.5 - 1, this->captureArea->height() - _rect_border_size.height() * 0.5 - edgeMargin)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() * 0.5 + edgeMargin, _rect_border_size.height() + edgeMargin), QPoint(_rect_border_size.width() * 0.5 + edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 - 1)));
painter.drawLine(QLine(QPoint(_rect_border_size.width() * 0.5 + edgeMargin, (this->captureArea->height() - _rect_border_size.height()) * 0.5 + _rect_border_size.height()), QPoint(_rect_border_size.width() * 0.5 + edgeMargin, this->captureArea->height() - _rect_border_size.height() - edgeMargin - 1)));
}
if(event->type() == QEvent::Resize || event->type() == QEvent::Move )
{
repaint();
}
}
return QFrame::eventFilter(obj, event);
}
void MaskFrameBase::paintEvent(QPaintEvent *)
{
QPainter painter(this);
if(this->captureArea->isVisible() && captureAreaValide())
{
//左边区域
painter.fillRect(QRect(0, this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin,
this->captureArea->pos().x()+_rect_border_size.width() * 0.5+edgeMargin ,
this->captureArea->height()-_rect_border_size.height()-edgeMargin*2),
QBrush(QColor(0, 0, 0,128)));
//上边区域
painter.fillRect(QRect(0, 0, width(), this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin),
QBrush(QColor(0, 0, 0,128)));
//右边区域
painter.fillRect(QRect(this->captureArea->geometry().right()-edgeMargin-_rect_border_size.width() * 0.5,
this->captureArea->pos().y()+_rect_border_size.height() * 0.5+edgeMargin,
width()-this->captureArea->geometry().right()+_rect_border_size.width() * 0.5+edgeMargin,
this->captureArea->height()-_rect_border_size.height()-edgeMargin*2),
QBrush(QColor(0, 0, 0,128)));
//下边区域
painter.fillRect(QRect(0,
this->captureArea->geometry().top()+this->captureArea->height()-_rect_border_size.height() * 0.5-edgeMargin,
width(),
height()-this->captureArea->geometry().bottom()+_rect_border_size.height()*0.5+edgeMargin),
QBrush(QColor(0, 0, 0,128)));
//透明区域
QRect rect;
rect.setX(this->captureArea->pos().x()+_rect_border_size.width()*0.5+edgeMargin);
rect.setY(this->captureArea->pos().y()+_rect_border_size.height()*0.5 +edgeMargin);
rect.setWidth(this->captureArea->width()-_rect_border_size.width()-edgeMargin*2);
rect.setHeight(this->captureArea->height()-_rect_border_size.height()-edgeMargin*2);
#ifdef Q_OS_WIN
painter.fillRect(rect, QBrush(QColor(0, 0, 0, 1)));
#else
painter.fillRect(rect, QBrush(QColor(0, 0, 0, 20)));
#endif
}
else
{
painter.fillRect(rect(), QBrush(QColor(0, 0, 0, 128)));
}
}
void MaskFrameBase::createBtnFrame()//按钮
{
}
void MaskFrameBase::cancelSelect()
{
}
void MaskFrameBase::adjustCaptureArea()
{
if(this->width()==0 || this->height()==0){
return;
}
int startx = this->startPointCapture.x();
int starty = this->startPointCapture.y();
int endx = this->endPointCapture.x();
int endy = this->endPointCapture.y();
int captureHeight = endy-starty;
//mid-capture
int captureWidth = endx-startx;
this->captureArea->setGeometry(startx,starty,captureWidth,captureHeight);
if(!this->captureArea->isVisible()){
this->captureArea->show();
}
}
//只处理公共的移动事件，在移动时，调整抓取的区域坐标
bool MaskFrameBase::updateCaptureRect()
{
if(this->operateMode == MoveArea)
{
if(captureAreaValide()){
updateCaptureRectMove();
return true;
}
}
return false;
}
//移动时，改变抓屏区坐标
void MaskFrameBase::updateCaptureRectMove()
{
int movex = this->curmousePoint.x()-this->pressPoint.x();
int movey = this->curmousePoint.y()-this->pressPoint.y();
//qDebug()<<"updateCaptureRectMove:"<<movex<<" "<<movey<<endl;
bool outbounds = false;
if(movex > 0){
//移动到右边界时，停止移动
if(this->endPointCaptureMark.x()+movex > this->width()){
//qDebug()<<"updateCaptureRectMove over right"<<endl;
movex = this->width()-this->endPointCaptureMark.x();
outbounds = true;
}
}
else{
//移动到左边界
if(this->startPointCaptureMark.x()+movex < 0){
//qDebug()<<"updateCaptureRectMove over left"<<endl;
movex = -this->startPointCaptureMark.x();
outbounds = true;
}
}
if(movey > 0){
//移动到下边界
if(this->endPointCaptureMark.y()+movey > this->height()){
//qDebug()<<"updateCaptureRectMove over bottom"<<endl;
movey = this->height()-this->endPointCaptureMark.y();
outbounds = true;
}
}
else{
//移动到上边界
if(this->startPointCaptureMark.y()+movey < 0){
//qDebug()<<"updateCaptureRectMove over top"<<endl;
movey = -this->startPointCaptureMark.y();
outbounds = true;
}
}
if(outbounds){
//固定一下鼠标
QPoint curcurpos(this->pressPoint.x()+movex,this->pressPoint.y()+movey);
QApplication::desktop()->cursor().setPos(this->mapToGlobal(curcurpos));
}
//调整截屏区域坐标
this->startPointCapture.setX(this->startPointCaptureMark.x()+movex);
this->startPointCapture.setY(this->startPointCaptureMark.y()+movey);
this->endPointCapture.setX(this->endPointCaptureMark.x()+movex);
this->endPointCapture.setY(this->endPointCaptureMark.y()+movey);
}
void MaskFrameBase::alignPoint(QPoint& startpt,QPoint& endpt)
{
int startx = startpt.x();
int starty = startpt.y();
int endx = endpt.x();
int endy = endpt.y();
startpt.setX(qMin(startx,endx));
startpt.setY(qMin(starty,endy));
endpt.setX(qMax(startx,endx));
endpt.setY(qMax(starty,endy));
}
void MaskFrameBase::generateResultPos(QPoint startpt,QPoint endpt)
{
this->startPointCapture.setX(qMin(startpt.x(),endpt.x()));
this->startPointCapture.setY(qMin(startpt.y(),endpt.y()));
this->endPointCapture.setX(qMax(startpt.x(),endpt.x()));
this->endPointCapture.setY(qMax(startpt.y(),endpt.y()));
}
void MaskFrameBase::showBtnFrame()
{
if(this->btnFrame==NULL || !captureAreaValide()){
return;
}
//右下角显示的
int posX = this->endPointCapture.x()-this->btnFrameWidth;
int posY = this->endPointCapture.y();
if(posX <= 0){
posX = this->startPointCapture.x();
}
if(posY+this->btnFrameHeigh >= this->height()){
if(this->startPointCapture.y()-1-this->btnFrameHeigh > 0){
posY = this->startPointCapture.y()-this->btnFrameHeigh;
}
else{
posY = this->endPointCapture.y()-1-this->btnFrameHeigh;
}
}
// //右上角显示的
// int posX = this->endPointCapture.x()-this->btnFrameWidth;
// int posY = this->startPointCapture.y()-this->btnFrameHeigh;
// //截屏区宽度小于工具栏宽度，且截屏区很靠左侧
// if(posX <= 0){
// posX = this->startPointCapture.x();
// }
// if(posY <= 1){
// if(this->endPointCapture.y()+this->btnFrameHeigh+1 < this->height()){
// posY = this->endPointCapture.y();
// }
// else{
// posY = this->startPointCapture.y()+1;
// }
// }
this->btnFrame->setGeometry(posX,posY,this->btnFrameWidth,this->btnFrameHeigh);
this->btnFrame->show();
this->btnFrame->raise();
}
QPushButton* MaskFrameBase::createActionButton(const QString &name, const QString& toolTipKey, const QString &icon){
QPushButton* actionButton = new QPushButton(this->btnFrame);
actionButton->setIconSize(dpiSize(20, 20));
actionButton->setIcon(QIcon(icon));
actionButton->setText(name);
actionButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
actionButton->setFixedSize(dpiSize(96, 50));
return actionButton;
}
//鼠标未按下左键，移动过程中使用，会改变鼠标指针样式
bool MaskFrameBase::judgeOperateState(QPoint curpos)
{
if(this->bLeftPressed){
return false;
}
int tmpptx = this->startPointCapture.x()+this->captureBorderWidth+this->borderEdgeWidth;
int tmppty = this->startPointCapture.y()+this->captureBorderWidth+this->borderEdgeWidth;
QPoint startTmp(tmpptx,tmppty);
tmpptx = this->endPointCapture.x()-this->captureBorderWidth-this->borderEdgeWidth;
tmppty = this->endPointCapture.y()-this->captureBorderWidth-this->borderEdgeWidth;
QPoint endTmp(tmpptx,tmppty);
QRect captureRect(startTmp,endTmp);
//无选定区域时，显示选中图
if(captureRect.width()<captureBorderWidth*2 || captureRect.height()<captureBorderWidth*2){
if(!judgeUponCorner(curpos))
{
if(captureRect.contains(curpos)){
this->operateMode = MoveArea;
this->setCursor(Qt::SizeAllCursor);
//qDebug()<<"judgeOperateState MoveArea"<<endl;
}
else
{
this->operateMode = SelectArea;
this->setCursor(Qt::CrossCursor);
}
}
return true;
}
//是否在弹出按钮上
if(judgeUponBtnFrame(curpos)){
//qDebug()<<"judgeOperateState onBotton"<<endl;
return true;
}
//在截取区，可拖动选取区域
if(captureRect.contains(curpos)){
this->operateMode = MoveArea;
this->setCursor(Qt::SizeAllCursor);
//qDebug()<<"judgeOperateState MoveArea"<<endl;
return true;
}
//判断是否在边框上
if(judgeUponBorder(curpos)){
//qDebug()<<"judgeOperateState:border match"<<endl;
return true;
}
return false;
//在四个边角的判断不是每个子类都需要
//qDebug()<<"judgeOperateState last SelectArea"<<endl;
}
//鼠标是否移动到四个边角
bool MaskFrameBase::judgeUponCorner(QPoint curpos)
{
if(this->bLeftPressed){
return false;
}
//左上角
int tmpptx = this->startPointCapture.x()-this->borderEdgeWidth;
int tmppty = this->startPointCapture.y()-this->borderEdgeWidth;
QPoint startTmp(tmpptx,tmppty);
tmpptx = this->startPointCapture.x()+this->captureBorderWidth+this->borderEdgeWidth;
tmppty = this->startPointCapture.y()+this->captureBorderWidth+this->borderEdgeWidth;
QPoint endTmp(tmpptx,tmppty);
QRect leftTopRect(startTmp,endTmp);
if(leftTopRect.width()>1 && leftTopRect.height()>1 &&
leftTopRect.contains(curpos)){
this->operateMode = CornerScale;
this->cornerSide = LeftTop;
this->setCursor(Qt::SizeFDiagCursor);
//qDebug()<<"judgeUponCorner LeftTop"<<endl;
return true;
}
//右上角
tmpptx = this->endPointCapture.x()-this->captureBorderWidth-this->borderEdgeWidth;
tmppty = this->startPointCapture.y()-this->borderEdgeWidth;
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = this->endPointCapture.x()+this->borderEdgeWidth;
tmppty = this->startPointCapture.y()+this->captureBorderWidth+this->borderEdgeWidth;
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect rightTopRect(startTmp,endTmp);
if(rightTopRect.width()>1 && rightTopRect.height()>1 &&
rightTopRect.contains(curpos)){
this->operateMode = CornerScale;
this->cornerSide = RightTop;
this->setCursor(Qt::SizeBDiagCursor);
//qDebug()<<"judgeUponCorner RightTop"<<endl;
return true;
}
//左下角
tmpptx = this->startPointCapture.x()-this->borderEdgeWidth;
tmppty = this->endPointCapture.y()-this->captureBorderWidth-this->borderEdgeWidth;
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = this->startPointCapture.x()+this->captureBorderWidth+this->borderEdgeWidth;
tmppty = this->endPointCapture.y()+this->borderEdgeWidth;
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect leftBottomRect(startTmp,endTmp);
if(leftBottomRect.width()>1 && leftBottomRect.height()>1 &&
leftBottomRect.contains(curpos)){
this->operateMode = CornerScale;
this->cornerSide = LeftBottom;
this->setCursor(Qt::SizeBDiagCursor);
//qDebug()<<"judgeUponCorner LeftBottom"<<endl;
return true;
}
//右下角
tmpptx = this->endPointCapture.x()-this->captureBorderWidth-this->borderEdgeWidth;
tmppty = this->endPointCapture.y()-this->captureBorderWidth-this->borderEdgeWidth;
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = this->endPointCapture.x()+this->borderEdgeWidth;
tmppty = this->endPointCapture.y()+this->borderEdgeWidth;
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect rightBottomRect(startTmp,endTmp);
if(rightBottomRect.width()>1 && rightBottomRect.height()>1 &&
rightBottomRect.contains(curpos)){
this->operateMode = CornerScale;
this->cornerSide = RightBottom;
this->setCursor(Qt::SizeFDiagCursor);
//qDebug()<<"judgeUponCorner RightBottom"<<endl;
return true;
}
return false;
}
//鼠标是否移动到边框
bool MaskFrameBase::judgeUponBorder(QPoint curpos)
{
if(this->bLeftPressed){
return false;
}
int border = dpiWidth(2);
int starx = this->startPointCapture.x()+captureBorderWidth;
int stary = this->startPointCapture.y()+captureBorderWidth;
int endx = this->endPointCapture.x()-captureBorderWidth;
int endy = this->endPointCapture.y()-captureBorderWidth;
int width = qAbs(this->endPointCapture.x()-this->startPointCapture.x())-_rect_border_size.width()*2+lineWidth;
int height = qAbs(this->endPointCapture.y()-this->startPointCapture.y())-_rect_border_size.height()*2+lineWidth;
//左侧边框
int tmpptx = starx-_rect_border_size.width()*0.5;
int tmppty = stary;
QPoint startTmp(tmpptx,tmppty);
tmpptx = tmpptx + _rect_border_size.width();
tmppty = tmppty +height-lineWidth;
QPoint endTmp(tmpptx,tmppty);
QRect leftborder(startTmp,endTmp);
if(leftborder.width()>border && leftborder.height()>border &&
leftborder.contains(curpos)){
this->operateMode = BorderScale;
this->borderSide = LeftBorder;
this->setCursor(Qt::SizeHorCursor);
qDebug()<<"judgeUponBorder:LeftBorder"<<endl;
return true;
}
//右侧边框
tmpptx = endx-_rect_border_size.width()*0.5;
tmppty = stary;
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = tmpptx+_rect_border_size.width();
tmppty = tmppty + height-lineWidth;
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect rightborder(startTmp,endTmp);
if(rightborder.width()>border && rightborder.height()>border &&
rightborder.contains(curpos)){
this->operateMode = BorderScale;
this->borderSide = RightBorder;
this->setCursor(Qt::SizeHorCursor);
qDebug()<<"judgeUponBorder:RightBorder"<<endl;
return true;
}
//上边框
tmpptx = starx;
tmppty = stary-_rect_border_size.width();
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = tmpptx+width-lineWidth;
tmppty = tmppty+_rect_border_size.height();
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect topborder(startTmp,endTmp);
if(topborder.width()>1 && topborder.height()>1 &&
topborder.contains(curpos)){
this->operateMode = BorderScale;
this->borderSide = TopBorder;
this->setCursor(Qt::SizeVerCursor);
qDebug()<<"judgeUponBorder:TopBorder"<<endl;
return true;
}
//下边框
tmpptx = starx;
tmppty = endy-_rect_border_size.width()*0.5;
startTmp.setX(tmpptx);
startTmp.setY(tmppty);
tmpptx = tmpptx+width-lineWidth;
tmppty = tmppty+_rect_border_size.height();
endTmp.setX(tmpptx);
endTmp.setY(tmppty);
QRect bottomborder(startTmp,endTmp);
if(bottomborder.width()>border && bottomborder.height()>border &&
bottomborder.contains(curpos)){
this->operateMode = BorderScale;
this->borderSide = BottomBorder;
this->setCursor(Qt::SizeVerCursor);
qDebug()<<"judgeUponBorder:BottomBorder"<<endl;
return true;
}
return false;
}
//鼠标是否移动到弹出的工具条
bool MaskFrameBase::judgeUponBtnFrame(QPoint curpos)
{
if(this->bLeftPressed){
return false;
}
if(!this->btnFrame->isVisible()){
//qDebug()<<"judgeUponBtnFrame not visible"<<endl;
return false;
}
QPoint startpos = this->btnFrame->pos();
QPoint endpos(startpos.x()+this->btnFrameWidth,startpos.y()+this->btnFrameHeigh);
QRect btnRect(startpos,endpos);
if(btnRect.width()>1 && btnRect.height()>1 &&
btnRect.contains(curpos)){
//qDebug()<<"judgeUponBtnFrame Normal"<<endl;
this->operateMode = Normal;
this->setCursor(Qt::ArrowCursor);
return true;
}
return false;
}
//截屏区域是否有效（有效是指有有效面积）
bool MaskFrameBase::captureAreaValide()
{
int width = this->endPointCapture.x()-this->startPointCapture.x();
int heigh = this->endPointCapture.y()-this->startPointCapture.y();
if(width < this->captureBorderWidth*2 ||
heigh < this->captureBorderWidth*2){
return false;
}
return true;
}
//判断点是否已在全屏的边界
bool MaskFrameBase::isPointToBorder(const QPoint& pt)
{
if(pt.x()<=0 || pt.x()>=this->width() ||
pt.y()<=0 || pt.y()>=this->height()){
return true;
}
return false;
}
#ifndef MASK_FRAME_BASE_H
#define MASK_FRAME_BASE_H
#include <QPoint>
#include <QObject>
#include <QFrame>
#include "snappopupview.h"
class QLabel;
class QToolButton;
/**
* @brief The MaskFrameBase class 抓屏/屏幕分享过程中的遮罩层-基类
*/
class MaskFrameBase : public QFrame {
Q_OBJECT
protected:
enum eOperateMode{
Normal,//鼠标变成普通的指针形状
SelectArea,//选取/重新选取区域
MoveArea,//移动选定的区域
BorderScale,//拖动边框进行缩放
CornerScale//拖动边角进行缩放
};
enum eBorderSide{
LeftBorder,
TopBorder,
RightBorder,
BottomBorder
};
enum eCornerSide{
LeftTop,
LeftBottom,
RightTop,
RightBottom
};
public:
explicit MaskFrameBase(QWidget* parent = 0);
virtual ~MaskFrameBase();
void setup();
void showMask();
void reset();
protected:
virtual void resizeEvent(QResizeEvent* event) override;
virtual void mousePressEvent(QMouseEvent* event) override;
virtual void mouseMoveEvent(QMouseEvent *event) override;
virtual void mouseReleaseEvent(QMouseEvent *event) override;
virtual void enterEvent(QEvent*) override;
virtual void leaveEvent(QEvent*) override;
virtual bool eventFilter(QObject *obj, QEvent *event) override;
virtual void paintEvent(QPaintEvent *) override;
protected:
virtual void createBtnFrame();
virtual void showBtnFrame();
virtual bool judgeOperateState(QPoint curpos);//鼠标未按下左键，移动过程中使用，会改变鼠标指针样式
virtual bool updateCaptureRect();//更新截屏区域的坐标，更新了返回true
virtual void adjustCaptureArea();//调整绘制区
virtual void cancelSelect();
void calRect();
protected:
void setFixedParas();
QPushButton* createActionButton(const QString &name, const QString& toolTipKey, const QString &icon);
void alignPoint(QPoint& startpt,QPoint& endpt);//将一对点，整理一下，startpt返回左上
void generateResultPos(QPoint startpt,QPoint endpt);
bool captureAreaValide();//截屏区域是否有效（有效是指有有效面积）
bool isPointToBorder(const QPoint& pt);//判断点是否已在全屏的边界
bool judgeUponCorner(QPoint curpos);//鼠标是否移动到四个边角
bool judgeUponBorder(QPoint curpos);//鼠标是否移动到边框
bool judgeUponBtnFrame(QPoint curpos);//鼠标是否移动到弹出的工具条
void updateCaptureRectMove();//移动时，改变抓屏区坐标
void restrictMouseMove(QPoint& pt);
protected:
QFrame* captureArea;//透明区域，选取图像
QFrame* btnFrame;//操作按钮
bool bSetupView;
bool bLeftPressed;
QPoint pressPoint;//鼠标点坐标
QPoint curmousePoint;
QPoint startPointCapture;//截屏区域
QPoint endPointCapture;
QPoint startPointCaptureMark;//按下鼠标瞬间的截屏区域
QPoint endPointCaptureMark;
eOperateMode operateMode;//鼠标移动时，操作的类型
eBorderSide borderSide;//BorderScale模式下选定的是哪个边
eCornerSide cornerSide;//CornerScale模式下选定的是哪个角
int mScale;
int btnHeigh;
int btnFrameWidth;
int btnFrameHeigh;
int sizeTipFrameWidth;
int sizeTipFrameHeigh;
QString maskColor;
QString capturBorderStyle;
int captureBorderWidth;//边框
int borderEdgeWidth;//判断鼠标移动到边框上时，边框区域=边框本身的宽度+borderEdgeWidth
SnapPopupView * snapPopupView;
//矩形
QRect leftTopRect;
QRect topRect;
QRect rigtTopRect;
QRect rightRect;
QRect rightBottomRect;
QRect bottomRect;
QRect leftBottomRect;
QRect leftRect;
QRect centerRect;
int edgeMargin; //鼠标检测的边缘距离
QSize _rect_border_size;
int lineWidth;
};
#endif // MASK_FRAME_BASE_H
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