#include <QApplication>  
#include <QStackedWidget>  
#include <QPushButton>  
#include <QVBoxLayout>  
#include <QWidget>  
#include <QLabel>  
  
int main(int argc, char *argv[]) {  
    QApplication app(argc, argv);  
  
    // 創(chuàng)建主窗口  
    QWidget window;  
    QVBoxLayout *layout = new QVBoxLayout(&window);  
  
    // 創(chuàng)建QStackedWidget  
    QStackedWidget *stackedWidget = new QStackedWidget;  
  
    // 添加幾個(gè)頁面到QStackedWidget  
    QWidget *page1 = new QWidget;  
    QLabel *label1 = new QLabel("Page 1", page1);  
    QVBoxLayout *page1Layout = new QVBoxLayout(page1);  
    page1Layout->addWidget(label1);  
  
    QWidget *page2 = new QWidget;  
    QLabel *label2 = new QLabel("Page 2", page2);  
    QVBoxLayout *page2Layout = new QVBoxLayout(page2);  
    page2Layout->addWidget(label2);  
  
    QWidget *page3 = new QWidget;  
    QLabel *label3 = new QLabel("Page 3", page3);  
    QVBoxLayout *page3Layout = new QVBoxLayout(page3);  
    page3Layout->addWidget(label3);  
  
    stackedWidget->addWidget(page1);  
    stackedWidget->addWidget(page2);  
    stackedWidget->addWidget(page3);  
  
    // 將QStackedWidget添加到主窗口布局  
    layout->addWidget(stackedWidget);  
  
    // 創(chuàng)建按鈕來切換頁面  
    QPushButton *prevButton = new QPushButton("Previous");  
    QPushButton *nextButton = new QPushButton("Next");  
    QHBoxLayout *buttonLayout = new QHBoxLayout;  
    buttonLayout->addWidget(prevButton);  
    buttonLayout->addWidget(nextButton);  
    layout->addLayout(buttonLayout);  
  
    // 初始時(shí)禁用“Previous”按鈕  
    prevButton->setEnabled(false);  
  
    // 連接信號(hào)與槽以切換頁面  
    QObject::connect(nextButton, &QPushButton::clicked, [stackedWidget, prevButton]() {  
        int currentIndex = stackedWidget->currentIndex();  
        if (currentIndex < stackedWidget->count() - 1) {  
            stackedWidget->setCurrentIndex(currentIndex + 1);  
            prevButton->setEnabled(true);  
        }  
    });  
  
    QObject::connect(prevButton, &QPushButton::clicked, [stackedWidget]() {  
        int currentIndex = stackedWidget->currentIndex();  
        if (currentIndex > 0) {  
            stackedWidget->setCurrentIndex(currentIndex - 1);  
            if (currentIndex == 1) {  
                // 在這個(gè)簡(jiǎn)單的例子中，我們總是啟用“Previous”按鈕  
                // 但在更復(fù)雜的應(yīng)用中，你可能需要根據(jù)實(shí)際情況來決定是否禁用它  
            }  
        }  
    });  
  
    // 示例：打印當(dāng)前頁面索引和頁面計(jì)數(shù)  
    qDebug() << "Initial current index:" << stackedWidget->currentIndex();  
    qDebug() << "Total page count:" << stackedWidget->count();  
  
    // 示例：通過currentWidget獲取當(dāng)前頁面并打印其標(biāo)簽文本（假設(shè)標(biāo)簽是頁面的直接子部件）  
    if (QLabel *currentLabel = stackedWidget->currentWidget()->findChild<QLabel*>()) {  
        qDebug() << "Current page label text:" << currentLabel->text();  
    }  
  
    window.setWindowTitle("QStackedWidget Example");  
    window.resize(400, 300);  
    window.show();  
    return app.exec();  
}

// 創(chuàng)建一個(gè)主窗口  
QWidget window;  
QVBoxLayout *layout = new QVBoxLayout(&window);  
  
// 創(chuàng)建一個(gè)QStackedWidget  
QStackedWidget *stackedWidget = new QStackedWidget;  
  
// 創(chuàng)建幾個(gè)頁面  
QWidget *page1 = new QWidget;  
QLabel *label1 = new QLabel("Page 1", page1);  
QVBoxLayout *page1Layout = new QVBoxLayout(page1);  
page1Layout->addWidget(label1);  
  
QWidget *page2 = new QWidget;  
QLabel *label2 = new QLabel("Page 2", page2);  
QVBoxLayout *page2Layout = new QVBoxLayout(page2);  
page2Layout->addWidget(label2);  

QWidget *page3 = new QWidget;  
QLabel *label3 = new QLabel("Page 3", page3);  
QVBoxLayout *page3Layout = new QVBoxLayout(page3);  
page3Layout->addWidget(label3);  
  
// 使用addWidget添加頁面到末尾  
stackedWidget->addWidget(page1);  
stackedWidget->addWidget(page2);

// 使用insertWidget在指定索引處插入頁面  
stackedWidget->insertWidget(1, page3); // 這將page3插入到page1和page2之間  

// 假設(shè)現(xiàn)在想要移除page2  
stackedWidget->removeWidget(page2);  

// 設(shè)置當(dāng)前頁面索引  
stackedWidget->setCurrentIndex(0); // 顯示page1

// 獲取并顯示指定索引處的子部件  
QWidget *currentPage = stackedWidget->widget(0);  
if (currentPage) {  
    QLabel *currentLabel = currentPage->findChild<QLabel*>();  
    if (currentLabel) {  
        qDebug() << "Current page label text:" << currentLabel->text();  
    }  
} 

// 獲取子部件在QStackedWidget中的索引  
int index = stackedWidget->indexOf(page3);  
qDebug() << "Index of page3:" << index; // 應(yīng)該輸出1，除非在添加/移除后修改了索引

// 連接currentChanged信號(hào)  
connect(stackedWidget, &QStackedWidget::currentChanged, this, [=](int index) {  
    qDebug() << "Current page changed to index:" << index;  
}); 

// 連接widgetRemoved信號(hào)  
connect(stackedWidget, &QStackedWidget::widgetRemoved, this, [=](int index) {  
    qDebug() << "Widget removed from index:" << index;  
}); 

#include <QApplication>  
#include <QStackedWidget>  
#include <QLabel>  
#include <QPushButton>  
#include <QVBoxLayout>  
#include <QHBoxLayout>  
  
class Wizard : public QWidget {  
    Q_OBJECT  
public:  
    Wizard(QWidget *parent = nullptr) : QWidget(parent) {  
        auto *stackedWidget = new QStackedWidget(this);  
  
        // 創(chuàng)建向?qū)ы撁? 
        QWidget *page1 = createPage("Welcome", "This is the first page of the wizard.");  
        QWidget *page2 = createPage("Name", "Enter your name:");  
        QWidget *page3 = createPage("Finish", "Thank you! You have completed the wizard.");  
  
        stackedWidget->addWidget(page1);  
        stackedWidget->addWidget(page2);  
        stackedWidget->addWidget(page3);  
  
        // 導(dǎo)航按鈕  
        auto *backButton = new QPushButton("Back", this);  
        auto *nextButton = new QPushButton("Next", this);  
  
        // 禁用“后退”按鈕在第一頁  
        backButton->setEnabled(false);  
  
        // 布局  
        auto *mainLayout = new QVBoxLayout(this);  
        mainLayout->addWidget(stackedWidget);  
  
        auto *buttonLayout = new QHBoxLayout();  
        buttonLayout->addWidget(backButton);  
        buttonLayout->addWidget(nextButton);  
        mainLayout->addLayout(buttonLayout);  
  
        // 連接信號(hào)和槽  
        connect(nextButton, &QPushButton::clicked, [=]() {  
            if(nextButton->text() == "Finish")
            {
                this->close();
            }
            int currentIndex = stackedWidget->currentIndex();  
            if (currentIndex < stackedWidget->count() - 1) {  
                stackedWidget->setCurrentIndex(currentIndex + 1);  
                if (currentIndex == 1) { // 假設(shè)第二頁是最后一頁需要處理的  
                    // 在這里處理用戶輸入，如驗(yàn)證名稱等  
                    // ...  
                }  
                backButton->setEnabled(true);  
                if (currentIndex == stackedWidget->count() - 2) {  
                    // 在最后一頁設(shè)置“下一步”按鈕文本
                    nextButton->setText("Finish");   
                }  
            }  
        });  
  
        connect(backButton, &QPushButton::clicked, [=]() {  
            int currentIndex = stackedWidget->currentIndex();  
            if (currentIndex > 0) {  
                stackedWidget->setCurrentIndex(currentIndex - 1);  
                backButton->setEnabled(currentIndex > 0);  
                if (currentIndex == 1) {  
                    nextButton->setText("Next");  
                    nextButton->setEnabled(true);  
                }  
            }  
        });  
  
        // 初始顯示第一步  
        stackedWidget->setCurrentIndex(0);  
    }  
  
private:  
    QWidget *createPage(const QString &title, const QString &text) {  
        QWidget *page = new QWidget();  
        QLabel *label = new QLabel(text, page);  
        QVBoxLayout *layout = new QVBoxLayout(page);  
        layout->addWidget(new QLabel(title, page));  
        layout->addWidget(label);  
        return page;  
    }  
};  
  
// ... (main函數(shù)和QApplication的實(shí)例化)