QStackedWidget

mian.cpp

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#include <QApplication>
#include <QWidget>
#include <QStackedWidget>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>

void setupStackedWidgetDemo(QWidget *parent) {
    // 主布局：垂直排列
    QVBoxLayout *mainLayout = new QVBoxLayout(parent);

    // --- 1. 创建堆栈窗体 ---
    QStackedWidget *stackedWidget = new QStackedWidget(parent);

    // --- 2. 创建第一页：欢迎页 ---
    QWidget *page1 = new QWidget();
    QVBoxLayout *layout1 = new QVBoxLayout(page1);
    layout1->addWidget(new QLabel("<h3>第一步：欢迎使用安装程序</h3>"));
    layout1->addWidget(new QLabel("点击下方按钮开始..."));
    layout1->addStretch();

    // --- 3. 创建第二页：设置页 ---
    QWidget *page2 = new QWidget();
    QVBoxLayout *layout2 = new QVBoxLayout(page2);
    layout2->addWidget(new QLabel("<h3>第二步：参数配置</h3>"));
    layout2->addWidget(new QLabel("请配置您的系统参数。"));
    layout2->addStretch();

    // --- 4. 创建第三页：完成页 ---
    QWidget *page3 = new QWidget();
    QVBoxLayout *layout3 = new QVBoxLayout(page3);
    layout3->addWidget(new QLabel("<h3>第三步：安装完成！</h3>"));
    layout3->addStretch();

    // --- 5. 将页面添加到堆栈中 ---
    stackedWidget->addWidget(page1);
    stackedWidget->addWidget(page2);
    stackedWidget->addWidget(page3);

    // --- 6. 创建底部控制按钮 ---
    QHBoxLayout *btnLayout = new QHBoxLayout();
    QPushButton *btnPrev = new QPushButton("上一页");
    QPushButton *btnNext = new QPushButton("下一页");
    btnLayout->addWidget(btnPrev);
    btnLayout->addWidget(btnNext);

    // --- 7. 信号处理：切换页面逻辑 ---
    QObject::connect(btnNext, &QPushButton::clicked, [stackedWidget]() {
        int curr = stackedWidget->currentIndex();
        // 如果没到最后一页，就往后跳
        if (curr < stackedWidget->count() - 1) {
            stackedWidget->setCurrentIndex(curr + 1);
        }
    });

    QObject::connect(btnPrev, &QPushButton::clicked, [stackedWidget]() {
        int curr = stackedWidget->currentIndex();
        // 如果不是第一页，就往前跳
        if (curr > 0) {
            stackedWidget->setCurrentIndex(curr - 1);
        }
    });

    // 组装到主布局
    mainLayout->addWidget(stackedWidget);
    mainLayout->addLayout(btnLayout);
}

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QWidget w;
    w.setWindowTitle("QStackedWidget 向导模式演示");
    w.resize(400, 300);
    setupStackedWidgetDemo(&w);
    w.show();
    return a.exec();
}