QTableWidget

main.cpp

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#include <QApplication>
#include <QWidget>
#include <QTableWidget>
#include <QTableWidgetItem>
#include <QVBoxLayout>
#include <QPushButton>
#include <QHeaderView>
#include <QMessageBox>

void setupTableWidgetDemo(QWidget *parent) {
    QVBoxLayout *layout = new QVBoxLayout(parent);

    // --- 1. 创建表格插件 ---
    // 创建一个 3 行 3 列的表格
    QTableWidget *tableWidget = new QTableWidget(3, 3, parent);

    // 设置水平表头（列名）
    tableWidget->setHorizontalHeaderLabels({"姓名", "年龄", "得分"});

    // 让表格填满可用空间
    tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

    // --- 2. 填充数据 ---
    // 行索引和列索引都从 0 开始
    // 第一行
    tableWidget->setItem(0, 0, new QTableWidgetItem("张三"));
    tableWidget->setItem(0, 1, new QTableWidgetItem("25"));
    tableWidget->setItem(0, 2, new QTableWidgetItem("95"));

    // 第二行（设置一个不可编辑的项）
    QTableWidgetItem *readOnlyItem = new QTableWidgetItem("李四");
    readOnlyItem->setFlags(readOnlyItem->flags() & ~Qt::ItemIsEditable); // 禁止编辑
    tableWidget->setItem(1, 0, readOnlyItem);
    tableWidget->setItem(1, 1, new QTableWidgetItem("22"));
    tableWidget->setItem(1, 2, new QTableWidgetItem("88"));

    // 第三行（带图标）
    QTableWidgetItem *iconItem = new QTableWidgetItem("王五");
    iconItem->setIcon(parent->style()->standardIcon(QStyle::SP_DirIcon));
    tableWidget->setItem(2, 0, iconItem);
    tableWidget->setItem(2, 1, new QTableWidgetItem("28"));
    tableWidget->setItem(2, 2, new QTableWidgetItem("92"));

    // --- 3. 交互按钮：获取选中内容 ---
    QPushButton *btnGet = new QPushButton("读取选中单元格", parent);
    QObject::connect(btnGet, &QPushButton::clicked, [tableWidget]() {
        QList<QTableWidgetItem*> selected = tableWidget->selectedItems();
        if (!selected.isEmpty()) {
            QMessageBox::information(nullptr, "结果", "你选中了：" + selected.first()->text());
        }
    });

    // --- 4. 信号：单元格内容被改变 ---
    QObject::connect(tableWidget, &QTableWidget::cellChanged, [](int row, int column) {
        qDebug() << "位置 (" << row << "," << column << ") 的数据被修改了！";
    });

    layout->addWidget(tableWidget);
    layout->addWidget(btnGet);
}

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QWidget w;
    w.setWindowTitle("QTableWidget 电子表格示例");
    w.resize(500, 400);
    setupTableWidgetDemo(&w);
    w.show();
    return a.exec();
}