QTreeWidget

添加Ui布局

头文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTreeWidgetItem>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    QTreeWidgetItem * AddTreeRoot(QString name,QString desc);
    QTreeWidgetItem * AddTreeNode(QTreeWidgetItem *parent,QString name,QString desc);

private slots:
    void on_addRootButton_clicked();

    void on_addButton_clicked();

    void on_deleteButton_clicked();

    void on_modifyButton_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

.cpp文件

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->treeWidget->setColumnCount(2);
    ui->treeWidget->setHeaderLabels(QStringList()<<"Name"<<"Description");
    QTreeWidgetItem *beiJingItem = AddTreeRoot("BeiJing","City");
    AddTreeNode(beiJingItem,"haiDian","HaiDian");
    AddTreeNode(beiJingItem,"chaoYang","ChaoYang");
    AddTreeNode(beiJingItem,"fengTai","FengTai");
    QTreeWidgetItem *heBeiItem =AddTreeRoot("HeBei","City");
    AddTreeNode(heBeiItem,"baoDing","BaoDing");
    AddTreeNode(heBeiItem,"shiJiaZhuang","ShiJiaZhuang");
}

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

QTreeWidgetItem *MainWindow::AddTreeRoot(QString name, QString desc)
{
    QTreeWidgetItem *item=new QTreeWidgetItem(QStringList()<<name<<desc);
    ui->treeWidget->addTopLevelItem(item);
    return item;
}

QTreeWidgetItem *MainWindow::AddTreeNode(QTreeWidgetItem *parent, QString name, QString desc)
{
    QTreeWidgetItem *item=new QTreeWidgetItem(QStringList()<<name<<desc);
    parent->addChild(item);
    return item;
}


void MainWindow::on_addRootButton_clicked()
{
    AddTreeRoot("new","new");
}

void MainWindow::on_addButton_clicked()
{
    QTreeWidgetItem *item= ui->treeWidget->currentItem();
    if(item!=NULL)
    {
        AddTreeNode(item,"new","new");
    }
    else
    {
        AddTreeRoot("new","new");
    }
}

void MainWindow::on_deleteButton_clicked()
{
    QTreeWidgetItem *currentItem = ui->treeWidget->currentItem();

    if(currentItem==NULL)
    {
        return;
    }
    //如果没有父节点就直接删除
    if(currentItem->parent()==NULL)
    {
        delete ui->treeWidget->takeTopLevelItem(ui->treeWidget->currentIndex().row());
    }
    else
    {
        //如果有父节点就要用父节点的takeChild删除节点
        delete currentItem->parent()->takeChild(ui->treeWidget->currentIndex().row());
    }
}

void MainWindow::on_modifyButton_clicked()
{
    QTreeWidgetItem * currentItem = ui->treeWidget->currentItem();

        if(currentItem==NULL)
        {
            return;
        }
        for(int i=0;i<currentItem->columnCount();i++)
        {
            currentItem->setText(i,tr("Modify")+QString::number(i));
        }
}

运行结果