Qtreewidget control of QT

One 、QTreeWidget Use

Adding tree nodes

#include "QtWidgetsApplication1.h"
#include <QtWidgets/QApplication>
#include <QTreeWidget>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    //QtWidgetsApplication1 w;
    //w.show();

    QTreeWidget* tree = new QTreeWidget();
    // Add a level one node 
    QTreeWidgetItem *items1 = new QTreeWidgetItem(tree,
        QStringList(QString("num_1")));
    QTreeWidgetItem *items2 = new QTreeWidgetItem(tree,
        QStringList(QString("num_2")));
    QTreeWidgetItem *items3 = new QTreeWidgetItem(tree,
        QStringList(QString("num_3")));
    //  Add secondary nodes 
    QTreeWidgetItem *item104 = new QTreeWidgetItem(items3,
        QStringList(QString("item104")));

    QTreeWidgetItem *item145 = new QTreeWidgetItem(item104,
        QStringList(QString("item145")));

    tree->show();
    return a.exec();
}

Realization effect

Two 、 Delete node

    tree->takeTopLevelItem(1);//  Delete index as 1 The node of 

     // lookup   And  num_1  Completely consistent items , And back to .
    QList<QTreeWidgetItem*> list = tree->findItems("num_1", Qt::MatchFlag::MatchExactly);
    //  Delete this item 
    for (auto item : list) {
        delete item;
    }

3、 ... and 、 Custom style

#include "QtWidgetsApplication1.h"
#include <QtWidgets/QApplication>
#include <QTreeWidget>
#pragma execution_character_set("utf-8")

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    //QtWidgetsApplication1 w;
    //w.show()


    QStringList head;
    head << " full name ";
    QTreeWidget* tree = new QTreeWidget();
    tree->show();
    //  Set the header 
    tree->setHeaderLabels(head);
    //  Add a level one node 
    head.clear();
    head << " Wang Genji ";
    QTreeWidgetItem *items1 = new QTreeWidgetItem(tree, head);
    head.clear();
    head << " Li dachui ";
    QTreeWidgetItem *items3 = new QTreeWidgetItem(tree, head);
    ///  Set the background color 
    items3->setBackground(0, QBrush(Qt::green));
    head.clear();
    head << " Lisiji ( Non biological )";
    QTreeWidgetItem *item104 = new QTreeWidgetItem(items3, head);
    return a.exec();
}

 

 

Reference resources ：

QT MSVC Chinese compilation error error: C2001: Line breaks in constants _ The blog of Yuanyue villa -CSDN Blog _qt Chinese compilation error
QTreeWidget Qt The most commonly used and best used tree list form _louie_chen The blog of -CSDN Blog _qt Tree list