bool Widget::eventFilter(QObject *obj, QEvent *event) { if(obj == ui->textEdit)//判断是textEdit { if(event->type() == QEvent::Wheel)//判断事件类型QEvent { QWheelEvent* wheelEvent =static_cast<QWheelEvent*>(event);//强制类型转换if(wheelEvent->delta()>0) ui->textEdit->zoomIn()...
首先,我们需要创建一个继承自QObject的类,并重写其eventFilter(QObject *watched, QEvent *event)方法。在这个方法中,我们可以根据event的类型进行相应的处理。 bool CustomEventFilter::eventFilter(QObject *watched, QEvent *event) { if (event->type() == QEvent::MouseButtonPress) { // 处理鼠标点击事件...
}elseif(event->type()==QEvent::MouseButtonPress) ui->lbUp->setText("Button Pressed");elseif(event->type()==QEvent::MouseButtonRelease) ui->lbUp->setText("Button Release");if(watched==ui->lbDown)if(event->type()==QEvent::Enter) ui->lbDown->setStyleSheet("background-color:rgb(...
event->spont =false;returnnotifyInternal2(receiver, event); }boolQCoreApplication::notifyInternal2(QObject *receiver, QEvent *event){boolselfRequired = QCoreApplicationPrivate::threadRequiresCoreApplication(); ……if(!selfRequired)returndoNotify(receiver, event);returnself->notify(receiver, event); }...
static int QEvent::registerEventType ( int hint = -1 ); 1. 函数是static的,因此可以使用QEvent类直接调用。函数接受一个int值,其默认值为-1,返回值是创建的这个Type类型的值。如果hint是合法的,不会发生任何覆盖,则会返回这个值;如果hint不合法,系统会自动分配一个合法值并返回。因此,使用这个函数即可完...
bool event( QEvent * e); 返回值 如果是true 代表用户处理这个事件,不向下分发了 e->type() == 鼠标按下 (1)mylabel.h #ifndef MYLABEL_H#define MYLABEL_H#include <QLabel>class myLabel : public QLabel{public:explicit myLabel(QWidget *parent = nullptr);//鼠标进入事件void enterEvent(QEven...
if (event->type() == QEvent::KeyPress) { QKeyEvent *keyEvent = static_cast(event); qDebug() << "Ate key press" << keyEvent->key(); return true; } else { return false; } } else { // pass the event on to the parent class ...
QT C++中的焦点事件可以分为两类:QFocusEvent和QFocusAboutToChange。QFocusEvent是最常见的焦点事件,表示一个控件获取或失去焦点。这个事件有两个子类型:FocusIn(焦点进入)和FocusOut(焦点离开)。当一个控件获取焦点时,它会收到一个FocusIn类型的QFocusEvent事件;当一个控件失去焦点时,它会收到一个FocusOut类型的...
if (event->type() == QEvent::MouseButtonPress) { if (qApp->mouseButtons() == Qt::RightButton) { menuMain->exec(QCursor::pos()); } } } return QWidget::eventFilter(watched, event); } void frmModuleCenter::initForm() { ui->labName->setText(App::Title); ...
=event){switch(event->type()){// this event is send if a translator is loadedcaseQEvent::LanguageChange:{ui->retranslateUi(this);break;}default:{break;}}}QWidget::changeEvent(event);}voidsetLanguageDialog::on_rbn_chinese_clicked(){bool ret=m_translator->load(QString(":/Translations/...