QTabWidget

main.cpp

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#include <QApplication>
#include <QWidget>
#include <QTabWidget>
#include <QVBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QIcon>

void setupTabWidgetDemo(QWidget *parent) {
    QVBoxLayout *mainLayout = new QVBoxLayout(parent);

    // --- 1. 创建选项卡主控件 ---
    QTabWidget *tabWidget = new QTabWidget(parent);

    // --- 2. 创建第一个页签的内容 (基本信息) ---
    QWidget *tab1 = new QWidget();
    QVBoxLayout *layout1 = new QVBoxLayout(tab1);
    layout1->addWidget(new QLabel("姓名:"));
    layout1->addWidget(new QLineEdit("张三", tab1));
    layout1->addWidget(new QLabel("职位:"));
    layout1->addWidget(new QLineEdit("开发者", tab1));
    layout1->addStretch();

    // --- 3. 创建第二个页签的内容 (系统设置) ---
    QWidget *tab2 = new QWidget();
    QVBoxLayout *layout2 = new QVBoxLayout(tab2);
    layout2->addWidget(new QPushButton("开启消息推送", tab2));
    layout2->addWidget(new QPushButton("检查版本更新", tab2));
    layout2->addStretch();

    // --- 4. 将页签添加到 QTabWidget 中 ---
    tabWidget->addTab(tab1, "基本资料");
    tabWidget->addTab(tab2, "系统设置");

    // 设置一些有趣的属性
    tabWidget->setTabIcon(0, QIcon::fromTheme("user-info")); // 给第一个页签加图标
    tabWidget->setTabsClosable(true); // 允许关闭页签
    tabWidget->setMovable(true);      // 允许鼠标拖动页签排序

    // --- 5. 信号：切换页签时触发 ---
    QObject::connect(tabWidget, &QTabWidget::currentChanged, [](int index) {
        qDebug() << "切换到了第" << index + 1 << "个页签";
    });

    // --- 6. 信号：点击关闭按钮时触发 ---
    QObject::connect(tabWidget, &QTabWidget::tabCloseRequested, [tabWidget](int index) {
        tabWidget->removeTab(index); // 真正移除页签
    });

    mainLayout->addWidget(tabWidget);
}

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QWidget w;
    w.setWindowTitle("QTabWidget 布局专家");
    w.resize(400, 300);
    setupTabWidgetDemo(&w);
    w.show();
    return a.exec();
}