Qt-鼠标点击别处隐藏widget

相关资料：

https://download.csdn.net/download/zhujianqiangqq/13131211     代码包下载

.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# 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 so, 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 6.0.0

SOURCES += 
    main.cpp 
    mainwindow.cpp

HEADERS += 
    mainwindow.h

FORMS += 
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES +=

main.cpp

#include "mainwindow.h"

#include <QApplication>
#include <QFile>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTabWidget>
#include <QLineEdit>
#include <QDebug>
#include <QMouseEvent>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
protected:
    bool eventFilter(QObject *obj, QEvent *event);

private slots:
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;

    QWidget *m_pTabCalibration;
};
#endif // MAINWINDOW_H

mainwinodw.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setWindowTitle(QStringLiteral("点击别处隐藏Widget"));

    // 注册事件过滤
    installEventFilter(this);

    // 内容显示
    m_pTabCalibration = new QWidget(this);
    m_pTabCalibration->setGeometry(0, 0, 200, 200);

    QLineEdit *oEdit = new QLineEdit(m_pTabCalibration);
    oEdit->setGeometry(10, 10, 100, 30);

    QLineEdit *oEdit2 = new QLineEdit(m_pTabCalibration);
    oEdit2->setGeometry(10, 40, 100, 30);

    QLineEdit *oEdit3 = new QLineEdit(m_pTabCalibration);
    oEdit3->setGeometry(10, 60, 100, 30);
}

MainWindow::~MainWindow()
{
    delete ui;
}

// 事件过滤，这里是重点
bool MainWindow::eventFilter(QObject *obj, QEvent *event)
{
    // WindowDeactivate事件是鼠标点击了本程序以外的地方。如需其他事件请查看QEvent常量。
    if (QEvent::MouseButtonPress == event->type())
    {
        if(!m_pTabCalibration->geometry().contains(this->mapFromGlobal(QCursor::pos())))
        {
            m_pTabCalibration->setVisible(false);
        };
    }
    return QObject::eventFilter(obj, event);
}


void MainWindow::on_pushButton_clicked()
{
    m_pTabCalibration->setVisible(true);
}