Qt in Treewidget add context menu

In Qt + VS2005, using the slot function customContextMenuRequested (QPointpos) to achieve Treewidget right menu bar.

1, in the editing interface ui, right QTreeWidget -> Connect Signal -> select customContextMenuRequested (QPoint), add slot function.

　　In the property, the property will be set to contextMenuPolicy: CustomContextMenu, can not forget this step, otherwise no reaction right.

2, add node Treewidget, by setData () to impart a different key for each node.

QTreeWidgetItem *root;    
root = new QTreeWidgetItem(ui->treeWidget, QStringList(QString("Connection")));
QVariant var0 (0);
root->setData(0,Qt::UserRole,var0);

3, used in the slot function itemAt () function to get the current node is clicked, then add different menus for different nodes.

void MainWindow::on_treeWidget_customContextMenuRequested(QPoint pos)
{
    QTreeWidgetItem * curItem = ui-> treeWidget-> itemAt (pos); // Get the current node is clicked
    if (curItem == NULL) return; // this case is not the right position treeItem range, i.e., right-click on a blank position
    QVariant var = curItem->data(0,Qt::UserRole);
    if (0 == var) // data (...) returns the data has been used in establishing setdata node before () set  
    {
       QMenu * popMenu = new QMenu (this); // define a right pop-up menu

       popMenu-> addAction (ui-> action_newDB); // add to the menu QAction the action in front of a designer defines
       popMenu->addAction(ui->action_openDB);
       popMenu->addAction(ui->action_delDB);
       popMenu-> exec (QCursor :: pos ()); // pop-up context menu, the menu location for the cursor position
    }
    else
    {
        QMenu * popMenu = new QMenu (this); // define a right pop-up menu

        popMenu-> addAction (ui-> action_newTable); // add to the menu QAction the action in front of a designer defines
        popMenu->addAction(ui->action_openTable);
        popMenu->addAction(ui->action_designTable);
        popMenu-> exec (QCursor :: pos ()); // pop-up context menu, the menu location for the cursor position
    }
}

 

Reference: http: //blog.csdn.net/moxiaomomo/article/details/6542683