Qt基础|Qt QTreeWidget 详解树结构|qtreewidget|树|qtreeWidget

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

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六.源码 QTreeWidget详细设置_qtreewidget-C/C++文档类资源-CSDN下载
七.多列树

文章图片

#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<<"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()<text(0); qDebug()<text(1); qDebug()<text(2); }

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