Qt C++ treeWidget设置checkbox,勾选的chexkbox添加到tablewidget表头输出

首先，我们需要在`QTreeWidget`中的每个`QTreeWidgetItem`中添加一个`QCheckBox`。可以使用`QTreeWidget::setItemWidget()`函数来实现。代码示例如下：

QTreeWidgetItem* item = new QTreeWidgetItem(ui->treeWidget);
QCheckBox* checkBox = new QCheckBox(ui->treeWidget);
ui->treeWidget->setItemWidget(item, 0, checkBox); //将checkBox添加到第一列

接下来，我们需要在`QTableWidget`的表头中添加一个`QCheckBox`来显示勾选的项目。可以使用`QTableWidget::setHorizontalHeaderItem()`函数来实现。代码示例如下：

QCheckBox* checkBox = new QCheckBox(ui->tableWidget->horizontalHeader());
ui->tableWidget->setHorizontalHeaderItem(0, new QTableWidgetItem(""));
ui->tableWidget->setCellWidget(0, 0, checkBox); //将checkBox添加到第一列第一行

然后，我们需要连接`QCheckBox`的`stateChanged()`信号，以便在勾选`QTreeWidget`中的`QCheckBox`时更新`QTableWidget`的表头。代码示例如下：

connect(checkBox, &QCheckBox::stateChanged, [=](int state) {
    if (state == Qt::Checked) {
        QTableWidgetItem* headerItem = ui->tableWidget->horizontalHeaderItem(0);
        QString text = headerItem->text() + " " + item->text(0);
        headerItem->setText(text);
    }
});

在上述示例代码中，连接了`checkBox`的`stateChanged()`信号，如果勾选了`checkBox`，则获取当前`QTableWidget`表头中的`QTableWidgetItem`，将勾选的`QTreeWidgetItem`中的文本添加到表头文本中。

完整示例代码如下：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QCheckBox>
#include <QTreeWidgetItem>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    //在QTreeWidget中添加QCheckBox
    QTreeWidgetItem* item1 = new QTreeWidgetItem(ui->treeWidget);
    QCheckBox* checkBox1 = new QCheckBox(ui->treeWidget);
    ui->treeWidget->setItemWidget(item1, 0, checkBox1);

    QTreeWidgetItem* item2 = new QTreeWidgetItem(ui->treeWidget);
    QCheckBox* checkBox2 = new QCheckBox(ui->treeWidget);
    ui->treeWidget->setItemWidget(item2, 0, checkBox2);

    //在QTableWidget表头中添加QCheckBox
    QCheckBox* checkBox = new QCheckBox(ui->tableWidget->horizontalHeader());
    ui->tableWidget->setHorizontalHeaderItem(0, new QTableWidgetItem(""));
    ui->tableWidget->setCellWidget(0, 0, checkBox);

    //连接QCheckBox的stateChanged()信号
    connect(checkBox, &QCheckBox::stateChanged, [=](int state) {
        if (state == Qt::Checked) {
            //获取勾选的QTreeWidgetItem
            QList<QTreeWidgetItem*> items = ui->treeWidget->selectedItems();
            for (int i = 0; i < items.size(); ++i) {
                QTreeWidgetItem* item = items[i];
                //将勾选的QTreeWidgetItem中的文本添加到QTableWidget表头中
                QTableWidgetItem* headerItem = ui->tableWidget->horizontalHeaderItem(0);
                QString text = headerItem->text() + " " + item->text(0);
                headerItem->setText(text);
            }
        }
    });
}

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