Qt QTreeWidget 详解

​一.常用API设置

1.添加顶层节点

//添加顶层节点 
QTreeWidgetItem *topItem1 = new QTreeWidgetItem(ui->treeWidget);    
topItem1->setText(0,"百度");    
ui->treeWidget->addTopLevelItem(topItem1);

2.设置表头隐藏,展开所有项

 //隐藏表头    
 ui->treeWidget->setHeaderHidden(true);     //设置展开    
 ui->treeWidget->expandAll(); 

3.顶层节点添加子节点

 QTreeWidgetItem *item11 = new QTreeWidgetItem(topItem1);    
 item11->setText(0,"研发部");    
 QTreeWidgetItem *item12 = new QTreeWidgetItem(topItem1);    
 item12->setText(0,"销售部");    
 QTreeWidgetItem *item13 = new QTreeWidgetItem(topItem1);   
 item13->setText(0,"人事部");

4.节点可以带一些数据,使用setData()这个接口

//设置数据,可以带多种数据    
item11->setData(0,Qt::UserRole,100/*人员数量*/);     
item11->setData(0,Qt::UserRole+1,"李彦宏"/*负责人名字*/);   
  
//获得数据     
item11->data(0,Qt::UserRole).toInt();     
item11->data(0,Qt::UserRole+1).toString();

5.节点可以设置自定义类型，设置图标、flags、文本

//自定义枚举 enum NodeType {     ROOT = 0,     SON  }； 
QTreeWidgetItem *item = new QTreeWidgetItem(ROOT); 
//item->setIcon(); 
//item->setText(); 
//item->setFlags();
 

二.设置带checkBox

QTreeWidgetItem *topItem2 = new QTreeWidgetItem(ui->treeWidget); 
topItem2->setText(0,"腾讯");   
topItem2->setCheckState(0,Qt::Checked);   
ui->treeWidget->addTopLevelItem(topItem2);     

QTreeWidgetItem *item21 = new QTreeWidgetItem(topItem2);    
item21->setText(0,"研发部");   
item21->setCheckState(0,Qt::Checked);   

QTreeWidgetItem *item22 = new QTreeWidgetItem(topItem2); 
item22->setText(0,"销售部");    
item22->setCheckState(0,Qt::Checked); 
   
QTreeWidgetItem *item23 = new QTreeWidgetItem(topItem2); 
item23->setText(0,"人事部");   
item23->setCheckState(0,Qt::Checked);

简单的响应一下点击信号,当顶层节点选中,下面的所有子节点全选中

connect(ui->treeWidget,&QTreeWidget::itemClicked,this, &Form::slotClicked);  

void Form::slotClicked(QTreeWidgetItem *item, int column)
{        
    //简单响应一下选中状态槽函数 
    for (int i=0; i<item->childCount(); i++)       
    {           
        QTreeWidgetItem *pChildItem = item->child(i);           
        pChildItem->setCheckState(0,item->checkState(0));       
    }   
}

三.右键菜单

//打开右键菜单属性
ui->treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);

//右键菜单
m_menu = new QMenu(ui->treeWidget);
m_menu->addAction("添加");
m_menu->addAction("删除"); 
  
//响应右键菜单信号槽 
connect(ui->treeWidget,&QTreeWidget::customContextMenuRequested,this,&Form::slotMenuPopup);      
void Form::slotMenuPopup(const QPoint &pos)
{
    m_menu->exec(ui->treeWidget->mapToGlobal(pos));     
}

四.设置qss

这里简单设置一下背景色，展开/合并时的图标，item的一些设置，仅供参考。

const QString styles = "QTreeView\
{\
    background-color: #5B677A;\
    font-size:17px;\
    color: white;\
}\
QTreeView::item:hover\
{\
    background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);\
    border: 1px solid #bfcde4;\
}\
QTreeView::item:hover\
{\
    background: rgb(69, 187, 217);\
}\
QTreeView::item:selected:active\
{\
    background: rgb(63, 147, 168);\
}\
QTreeView::item:selected:!active\
{\
    background: rgb(63, 147, 168);\
}\
QTreeView::branch\
{\
    background:#5B677A;\
}\
QTreeView::branch:has-children:!has-siblings:closed,QTreeView::branch:closed:has-children:has-siblings\
{\
    border-image: none;\
    background:#5B677A;\
    image: url(image/Folder-1.png);\
}\
QTreeView::branch:open:has-children:!has-siblings,QTreeView::branch:open:has-children:has-siblings\
{\
    border-image: none;\
    background:#5B677A;\
    image: url(image/Open-Folder.png);\
}";

//调用ui->treeWidget->setStyleSheet(styles);就行了。

五.运行效果

六.源码

​QTreeWidget详细设置_qtreewidget-C/C++文档类资源-CSDN下载

七.多列树

​

​#include "widget.h"
#include "ui_widget.h"
#include <QDebug>

const QString sstyle = "\
QHeaderView::section\
{\
    background-color: white;\
}";

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

    QStringList strList;
    strList<<"名称"<<"年龄"<<"性别";
    ui->treeWidget->setHeaderLabels(strList);
    ui->treeWidget->header()->setStyleSheet(sstyle);

    QTreeWidgetItem *item1 = new QTreeWidgetItem(QStringList()<<"七年级");
    ui->treeWidget->addTopLevelItem(item1);

    QTreeWidgetItem *item11 = new QTreeWidgetItem(QStringList()<<"小涨"<<"13"<<"男");
    item1->addChild(item11);
    QTreeWidgetItem *item12 = new QTreeWidgetItem(QStringList()<<"小红"<<"14"<<"女");
    item1->addChild(item12);
    QTreeWidgetItem *item13 = new QTreeWidgetItem(QStringList()<<"小丽"<<"13"<<"女");
    item1->addChild(item13);

    QTreeWidgetItem *item2 = new QTreeWidgetItem(QStringList()<<"八年级");
    ui->treeWidget->addTopLevelItem(item2);

    QTreeWidgetItem *item21 = new QTreeWidgetItem(QStringList()<<"小涨"<<"13"<<"男");
    item2->addChild(item21);
    QTreeWidgetItem *item22 = new QTreeWidgetItem(QStringList()<<"小红"<<"14"<<"女");
    item2->addChild(item22);
    QTreeWidgetItem *item23 = new QTreeWidgetItem(QStringList()<<"小丽"<<"13"<<"女");
    item2->addChild(item23);

    QTreeWidgetItem *item3 = new QTreeWidgetItem(QStringList()<<"九年级");
    ui->treeWidget->addTopLevelItem(item3);

    QTreeWidgetItem *item31 = new QTreeWidgetItem(QStringList()<<"小涨"<<"13"<<"男");
    item3->addChild(item31);
    QTreeWidgetItem *item32 = new QTreeWidgetItem(QStringList()<<"小红"<<"14"<<"女");
    item3->addChild(item32);
    QTreeWidgetItem *item33 = new QTreeWidgetItem(QStringList()<<"小丽"<<"13"<<"女");
    item3->addChild(item33);
}

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

void Widget::on_treeWidget_itemClicked(QTreeWidgetItem *item, int column)
{
    qDebug()<<item->text(0);
    qDebug()<<item->text(1);
    qDebug()<<item->text(2);
}