子类化QTreeWidgetItem实现增加Item的属性

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2022年9月15日10:49:35评论21 views字数 3287阅读10分57秒阅读模式

因为有需求是点击QTreeWidgetItem需要获取该Item的节点的相关属性，Item需要保存关联的属性，那么就需要扩展QTreeWidgetItem，当然，C++中扩展修改一个类或组件的方式就是继承了，

然后创建子类化的类的实例，就可以添加进QTreeWidget了，以下是子类化的代码:

///////////////////////////////H文件/////////////////////////////////#pragma once
#include #include #include 
class OrgTreeWidgetItem : public QObject, public QTreeWidgetItem{
    Q_OBJECTpublic:    OrgTreeWidgetItem(OrgTreeWidgetItem *parent);    OrgTreeWidgetItem(OrgTreeWidgetItem *parent, const QStringList& list);    OrgTreeWidgetItem(const QStringList& list);    ~OrgTreeWidgetItem();
    void setOrgId(const QString& id);    void setOrgName(const QString& name);    void setOrgAddress(const QString& addr);    void setOrgDescription(const QString& desc);
    QString getOrgId() const;    QString getOrgName() const;    QString getOrgAddress() const;    QString getOrgDescription() const;public:     QString m_orgId;    QString m_orgName;    QString m_orgAddress;    QString m_orgDescription;};
/////////////////////////////CPP实现文件////////////////////////////OrgTreeWidgetItem::OrgTreeWidgetItem(OrgTreeWidgetItem *parent)    : QTreeWidgetItem(parent){}
OrgTreeWidgetItem::OrgTreeWidgetItem(OrgTreeWidgetItem *parent, const QStringList& list)    : QTreeWidgetItem(parent,list){
}
OrgTreeWidgetItem::OrgTreeWidgetItem(const QStringList& list)    : QTreeWidgetItem(list){
}
OrgTreeWidgetItem::~OrgTreeWidgetItem(){}
void OrgTreeWidgetItem::setOrgId(const QString& id){    m_orgId = id;}
void OrgTreeWidgetItem::setOrgName(const QString& name){    m_orgName = name;}
void OrgTreeWidgetItem::setOrgAddress(const QString& addr){    m_orgAddress = addr;}
void OrgTreeWidgetItem::setOrgDescription(const QString& desc){    m_orgDescription = desc;}
QString OrgTreeWidgetItem::getOrgId() const{    return m_orgId;}
QString OrgTreeWidgetItem::getOrgName() const{    return m_orgName;}
QString OrgTreeWidgetItem::getOrgAddress() const{    return m_orgAddress;}
QString OrgTreeWidgetItem::getOrgDescription() const{    return m_orgDescription;}

以下是用法:

void OrgTree::appendChildToTreeItem(OrgTreeWidgetItem* item, const OrgTreeNode& node){    OrgTreeWidgetItem* child = new OrgTreeWidgetItem(QStringList() << QString::fromStdString(node.name));    child->setOrgId(QString(node.id.c_str()));    child->setOrgName(QString(node.name.c_str()));    child->setOrgAddress(QString(node.addr.c_str()));    child->setOrgDescription(QString(node.description.c_str()));    item->addChild(child);
    auto childs = m_parser->findChildsById(node.id);    for (auto childNode : childs)    {        appendChildToTreeItem(child, childNode);    }}

这样就可以复用QTreeWidget的信号了，单击Item就跳转到相应的槽函数，就为以后弹出上下文菜单增加，删除节点做好了准备：

connect(ui.treeWidget, &QTreeWidget::itemClicked,        this, &OrgTree::slotItemClicked);    connect(ui.treeWidget, &QTreeWidget::itemDoubleClicked,        this, &OrgTree::slotItemDoubleClicked);
void OrgTree::slotItemClicked(QTreeWidgetItem *item, int column){    auto test = dynamic_cast(item);    if (test)    {        QString name = test->getOrgName();        QString id = test->getOrgId();        QString addr = test->getOrgAddress();        QString description = test->getOrgDescription();
        QString format = QString("name: %1 rn id: %2 rn address: %3 rn description: %4").arg(name)            .arg(id).arg(addr).arg(description);
        ui.plainTextEdit->setPlainText(format);    }}
void OrgTree::slotItemDoubleClicked(QTreeWidgetItem *item, int column){   auto test = dynamic_cast(item);    if (test)    {        QString name = test->getOrgName();        QString id = test->getOrgId();
    }}

references:

https://stackoverflow.com/questions/28824494/how-to-used-itemexpanded-with-a-subclass-of-qtreewidgetitem

子类化QTreeWidgetItem实现增加Item的属性

子类化QTreeWidgetItem实现增加Item的属性 - foo__hack - 博客园 (cnblogs.com)

原文始发于微信公众号（汇编语言）：子类化QTreeWidgetItem实现增加Item的属性

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  • 本文由 发表于 2022年9月15日10:49:35
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