Qt右击菜单栏实现

ui->treeView_2->setContextMenuPolicy(Qt::CustomContextMenu);

2.创建treeview右击菜单槽函数，如：

void MainWindow::on_treeView_2_customContextMenuRequested(const QPoint &pos)

{

QAction* common = nullptr;

common = new QAction(QIcon(":/TreeIcon/TreeIcon/refresh.png"), tr("刷新列表"), this);

QAction* cc_1 = nullptr;

cc_1 = new QAction(QIcon(":/TreeIcon/TreeIcon/changelib.png"), tr("修改设备"), this);

QAction* cc_2 = nullptr;

cc_2 = new QAction(QIcon(":/TreeIcon/TreeIcon/property.png"), tr("设备属性"), this);

QMenu *menu = new QMenu(this);

menu->addAction(common);

menu->addAction(cc_1);

menu->addAction(cc_2);

connect(common, &QAction::triggered, this, &MainWindow::UpdateDevList); //每个Action信号相应一个槽函数

connect(cc_1, &QAction::triggered, this, &MainWindow::changedev);

connect(cc_2, &QAction::triggered, this, &MainWindow::showdevsta);

menu->setStyleSheet("QMenu{background-color:rgb(255,255,255);color:rgb(35, 103, 174);font:10pt ""Microsoft YaHei"";}"

"QMenu::item:selected{background-color:#CCDAE7;}"

"QMenu::item:disabled{color:#BFBFBF;}");

QModelIndex index = ui->treeView_2->indexAt(pos);

if(index.data().toString().isEmpty())

{

cc_1->setDisabled(true);

cc_2->setDisabled(true);

menu->exec(QCursor::pos());

}else if(!index.parent().isValid())

{

cc_1->setDisabled(true);

cc_2->setDisabled(true);

menu->exec(QCursor::pos());

}else if(index.parent().isValid())

{

/*QModelIndex cur_p = index.parent();

int selectrow_p = cur_p.row();

int selectrow_c = index.row();

QStandardIt
a318
emModel* model = static_cast<QStandardItemModel*>(ui->treeView->model());

QStandardItem* item = model->item(selectrow_p,0)->child(selectrow_c,0);

libm_storied = item->accessibleText().toStdString();

QList<facelist*>::iterator it2;

for(it2 = facewin.begin();it2 != facewin.end();++it2)

{

if(QString::fromStdString(libm_storied).toInt() == (*it2)->storeid)

{

libm_confide = QString::number((*it2)->confide).toStdString();

break;

}

}*/

menu->exec(QCursor::pos());

}

}