QT中treewidget中右键添加QAction方法

1. `void MainDispWindow::onHeaderRightClicked(const QPoint &pos)

   {

   QHeaderView *h = ui->tree_Equip->header();

   int col = h->logicalIndexAt(pos); // 点的是哪一列

   if (col == -1) return; // 空白处

   QMenu menu;

   QAction *addEquip = menu.addAction("添加设备");

   QAction *selected = menu.exec(h->mapToGlobal(pos));

   if (selected == addEquip)

   {

   QTimer::singleShot(0, this, this{ m_IPChangeDialog->show(); });

   }

   }`

2. `void MainDispWindow::on_tree_Equip_customContextMenuRequested(const QPoint &pos)

   {

   QTreeWidgetItem *item = ui->tree_Equip->itemAt(pos);

   if (!item) return; // 空白处右键直接忽略

   QMenu menu;

   QAction *addEquip = menu.addAction("添加设备");

   QAction *selected = menu.exec(ui->tree_Equip->viewport()->mapToGlobal(pos));

   if (selected == addEquip) {

   QTimer::singleShot(0, this, [this]{ m_IPChangeDialog->show(); });

   }

   }

   `