ui->setupUi(this); connect(this, &Dialog::sigUpdate,this, [this]() { //在GUI线程中执行updatethis->update(); },Qt::QueuedConnection);QtConcurrent::run([this]() {while(true) { //非GUI线程调用 emitthis->sigUpdate();QThread::msleep(100); } }); } Dialog::~Dialog() {deleteui; ...
m_pix = clearPix; this->update(); } 4、双缓冲具体实现代码 下面是实现双缓冲区域的地方: PaintArea::PaintArea(QWidget *parent) : QWidget(parent) { // 设置尺寸 this->setMinimumSize(600, 300); // 用调色板设置背景色 this->setPalette(QPalette(Qt::white)); this->setAutoFillBackground(true)...
如果支持BackingStore(默认支持),则标脏该控件所属的顶层窗口(TLW:: topLevelWidget缩写)区域,即调用tlwExtra->backingStoreTracker->markDirty(r, this);函数 a、把控件加入到dirtyWidgets容器中(addDirtyWidget函数) b、通知tlw进行刷新(sendUpdateRequest函数) sendUpdateRequest函数Post一个QEvent::UpdateRequest事件,...
connect(m_player, SIGNAL(durationChanged(qint64)), this, SLOT(SltDurationChanged(qint64))); connect(m_player, SIGNAL(positionChanged(qint64)), this, SLOT(SltPostionChanged(qint64))); connect(m_player, SIGNAL(error(QMediaPlayer::Error)), this, SLOT(SltMediaError(QMediaPlayer::Error))); m...
如果支持BackingStore(默认支持),则标脏该控件所属的顶层窗口(TLW:: topLevelWidget缩写)区域,即调用tlwExtra->backingStoreTracker->markDirty(r, this);函数 a、把控件加入到dirtyWidgets容器中(addDirtyWidget函数) b、通知tlw进行刷新(sendUpdateRequest函数) ...
(&mutex);listGraph<<graph;this->update();emitsig_graphChanged();}voidAbstractVideoWidget::removeGraph(constQString&name){QMutexLockerlocker(&mutex);intcount=listGraph.count();for(inti=0;i<count;++i){if(listGraph.at(i).name==name){listGraph.removeAt(i);break;}}this->update();emit...
update(); // this->repaint(index-1,0,5,realHeight);}void MainWindow::paintEvent(QPaintEvent *e){ //return ; QPainter painter(this); QRect target1(0, 0, realWidth, realHeight/5); QRect target2(0, realHeight/5, realWidth, realHeight/5); QRect target3(0, 2*realHeight/5, real...
{QPoint tmp_pos=event->pos();if(tmp_pos.x()>m_startPT.x()||tmp_pos.y()>m_startPT.y()){m_endPT=event->pos();}this->update();}voidWidget::mouseReleaseEvent(QMouseEvent*event){isPressedWidget=false;// 鼠标松开时,置为falseQRectrect(m_startPT,m_endPT);qDebug()<<"选择的...
this->move(this->x() + dx, this->y() + dy); return true; } else if (event->type() == QEvent::MouseButtonRelease && isPressed) { isPressed = false; update(); } return QWidget::eventFilter(watched, event); } void ColorButton::paintEvent(QPaintEvent *) ...
connect(m_pBtn, QOverload<bool>::of(&MyButton::sigClicked),this,&Widget::onClicked); 很显然这种写法相对于第二种会比较简单些,但依然不能连接到重载的槽函数,如果连接重载槽函数,还是会报之前的错误。 信号-槽的第三种写法# Lambda 函数写法 ...