qt-C++笔记之捕获鼠标滚轮事件并输出滚轮角度增量

code review!

1.运行

2.main.cpp

#include <QApplication>
#include <QWidget>
#include <QWheelEvent>
#include <QDebug>class WheelWidget : public QWidget {
protected:void wheelEvent(QWheelEvent *event) override {// 输出滚轮事件的相关信息qDebug() << "Wheel event delta:" << event->angleDelta();if (event->orientation() == Qt::Vertical) {qDebug() << "Vertical wheel";} else {qDebug() << "Horizontal wheel";}// Standard event processingevent->accept();}
};int main(int argc, char *argv[]) {QApplication a(argc, argv);WheelWidget widget;widget.show();return QApplication::exec();
}

在WheelWidget类中，wheelEvent函数被重写。这个函数是QWidget的一个虚函数，用于处理鼠标滚轮事件。

3.main.pro

#-------------------------------------------------
#
# Project created by QtCreator
#
#-------------------------------------------------QT       += core guigreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = test
TEMPLATE = app# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do this, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0SOURCES += \main.cpp# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target