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; ichildCount(); 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 
 
const QString sstyle = "\
QHeaderView::section\
{\
    background-color: white;\
}";
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
 
    QStringList strList;
    strList