QTreeWidget中添加右键菜单

头文件

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private slots:    void onGrpMenuTriggered(QAction *action);    void onMemberMenuTriggered(QAction *action);    void onAddAreaMenuTriggered(QAction *action);private:    //grp menu    QMenu *m_grpMenu;    //child menu    QMenu *m_memberMenu;    QMenu *m_addAreaMenu;    //grp action    QAction *m_grpAddOneMember;    QAction *m_grpDeleteGrp;    QAction *m_grpAddOneGrp;    //child action    QAction *m_memberDelete;    QAction *m_memberMove;    QAction *m_memberSyncTime;    //action    QAction *m_addAreaAction;    QAction *m_grpFlush;    QAction *m_addDev;    void createItemMenu(); //构造函数中调用此函数    void createTreeWidget();    void contextMenuEvent(QContextMenuEvent *event);private:    Ui::MainWindow *ui;};#endif // MAINWINDOW_H

.cpp文件

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QContextMenuEvent>#include <QTreeWidgetItem>#include <qDebug>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    createItemMenu();    createTreeWidget();}MainWindow::~MainWindow(){    delete ui;}void MainWindow::createItemMenu(){    m_grpMenu = new QMenu(this);    m_memberMenu = new QMenu(this);    m_addAreaMenu = new QMenu(this);    connect(m_grpMenu,SIGNAL(triggered(QAction *)),            this,SLOT(onGrpMenuTriggered(QAction *)));    connect(m_memberMenu,SIGNAL(triggered(QAction *)),            this,SLOT(onMemberMenuTriggered(QAction *)));    connect(m_addAreaMenu,SIGNAL(triggered(QAction *)),            this,SLOT(onAddAreaMenuTriggered(QAction *)));    m_grpAddOneMember = new QAction(tr("增加子区域"),this);    m_grpAddOneMember->setIcon(QIcon(":/image/add.png"));    m_grpAddOneGrp = new QAction(tr("增加设备"),this);    m_grpAddOneGrp->setIcon(QIcon(":/image/add.png"));    m_grpDeleteGrp = new QAction(tr("删除区域"),this);    m_grpDeleteGrp->setIcon(QIcon(":/image/delete.png"));    m_memberDelete = new QAction(tr("删除设备"),this);    m_memberDelete->setIcon(QIcon(":/image/delete.png"));    m_memberMove = new QAction(tr("移动设备"),this);    m_memberMove->setIcon(QIcon(":/image/next.png"));    m_memberSyncTime = new QAction(tr("同步时间"),this);    m_memberSyncTime->setIcon(QIcon(":/image/move.png"));    m_addAreaAction = new QAction(tr("增加区域"),this);    m_addAreaAction->setIcon(QIcon(":/image/add.png"));    m_addDev = new QAction(tr("增加设备"),this);    m_addDev->setIcon(QIcon(":/image/add.png"));    m_grpFlush = new QAction(tr("刷新列表"),this);    m_grpFlush->setIcon(QIcon(":/image/update.png"));}//重构contextMenuEvent函数，记得#include <QContextMenuEvent>void MainWindow::contextMenuEvent(QContextMenuEvent *event){    QTreeWidgetItem *item = ui->treeWidget->currentItem();    if(item == NULL)    {        qDebug()<<"空白处";        if (m_addAreaMenu->isEmpty())        {            //增加区域            m_addAreaMenu->addAction(m_addAreaAction);            m_addAreaMenu->addAction(m_addDev);            m_addAreaMenu->addAction(m_grpFlush);        }        //菜单出现的位置为当前鼠标的位置        m_addAreaMenu->exec(QCursor::pos());    }    else if(ui->treeWidget->currentItem()->childCount() > 0)    {        if (m_grpMenu->isEmpty())        {            //增加子区域            m_grpMenu->addAction(m_grpAddOneMember);            //删除区域            m_grpMenu->addAction(m_grpDeleteGrp);            m_grpMenu->addAction(m_grpAddOneGrp);        }        m_grpMenu->exec(QCursor::pos());    }    else if(ui->treeWidget->currentItem()->childCount() == 0)    {        if (m_memberMenu->isEmpty())        {            //删除设备            m_memberMenu->addAction(m_memberDelete);            //移动设备            m_memberMenu->addAction(m_memberMove);            //同步时间            m_memberMenu->addAction(m_memberSyncTime);        }        m_memberMenu->exec(QCursor::pos());    }    event->accept();}void MainWindow::onGrpMenuTriggered(QAction *action){    if (action == m_grpAddOneMember)    {//增加子区域        qDebug()<<"增加子区域";    }    else if (action == m_grpDeleteGrp)    {//删除区域        qDebug()<<"删除区域";    }    else if(action == m_grpAddOneGrp)    {        qDebug()<<"增加子区域";    }}void MainWindow::onMemberMenuTriggered(QAction *action){    if (action == m_memberDelete)    {//删除设备    }    else if(action == m_memberMove)    {//移动设备    }    else if(action == m_memberSyncTime)    {//同步时间    }}void MainWindow::onAddAreaMenuTriggered(QAction *action){    if (action == m_addAreaAction)    {//增加区域    }    if(action == m_addDev)    {//增加设备    }    if(action == m_grpFlush)    {//刷新    }}void MainWindow::createTreeWidget(){    QIcon icon;    icon.addPixmap(QPixmap(":/image/openStatus.png"), QIcon::Normal, QIcon::On);//节点打开状态    icon.addPixmap(QPixmap(":/image/closeStatus.png"), QIcon::Normal, QIcon::Off);//节点关闭状态    ui->treeWidget->setColumnCount(1);    QStringList headers;    headers << QObject::tr("管理");    ui->treeWidget->setHeaderLabels(headers);    QStringList rootName_1;    rootName_1 << QObject::tr("常用文件夹");    QTreeWidgetItem *rootItem_1 = new QTreeWidgetItem(ui->treeWidget, rootName_1);   // rootItem_1->setIcon(0, QIcon(":/image/add.png")); //增加静态图标    rootItem_1->setIcon(0,icon);    QStringList childName_1_1;    childName_1_1 << "所有未读";    QTreeWidgetItem *childItem_1_1 = new QTreeWidgetItem(rootItem_1, childName_1_1);    rootItem_1->addChild(childItem_1_1);    QStringList childName_1_2;    childName_1_2 << QObject::tr("置顶邮件");    QTreeWidgetItem *childItem_1_2 = new QTreeWidgetItem(rootItem_1, childName_1_2);    rootItem_1->addChild(childItem_1_2);    QStringList rootName_2;    rootName_2 << QObject::tr("我的邮箱");    QTreeWidgetItem *rootItem_2 = new QTreeWidgetItem(ui->treeWidget, rootName_2);    rootItem_2->setIcon(0,icon);    QStringList childName_2_1;    childName_2_1 << QObject::tr("收件箱");    QTreeWidgetItem *childItem_2_1 = new QTreeWidgetItem(rootItem_2, childName_2_1);    rootItem_2->addChild(childItem_2_1);    QStringList childName_2_2;    childName_2_2 << QObject::tr("草稿箱");    QTreeWidgetItem *childItem_2_2 = new QTreeWidgetItem(rootItem_2, childName_2_2);    rootItem_2->addChild(childItem_2_2);    QStringList childName_2_3;    childName_2_3 << QObject::tr("发件箱");    QTreeWidgetItem *childItem_2_3 = new QTreeWidgetItem(rootItem_2, childName_2_3);    rootItem_2->addChild(childItem_2_3);    ui->treeWidget->addTopLevelItem(rootItem_1);    ui->treeWidget->addTopLevelItem(rootItem_2);    QStringList childName_1_2_1;    childName_1_2_1 << "测试";    QTreeWidgetItem *childItem_1_2_1 = new QTreeWidgetItem(childItem_1_2, childName_1_2_1);    childItem_1_2->addChild(childItem_1_2_1);}