Example of showing different context menu for items in a QTreeWidget

example.cpp

#include "main.h"

int main(int argc, char** argv)
{
    QApplication app(argc, argv);

    MyTreeWidget w;
    w.show();

    // Add test items.
    w.addTopLevelItem(new QTreeWidgetItem(QStringList("A (type 1)"),
                                          ItemType1));
    w.addTopLevelItem(new QTreeWidgetItem(QStringList("B (type 1)"),
                                          ItemType1));

    w.addTopLevelItem(new QTreeWidgetItem(QStringList("C (type 2)"),
                                          ItemType2));
    w.addTopLevelItem(new QTreeWidgetItem(QStringList("D (type 2)"),
                                          ItemType2));

    app.exec();
    return 0;
}

example.h

#include <QApplication>

#include <QMenu>
#include <QMouseEvent>
#include <QTreeWidget>
#include <QTreeWidgetItem>

// Qt documentation states that user types should begin at this value.
static const int ItemType1 = QTreeWidgetItem::UserType;
static const int ItemType2 = QTreeWidgetItem::UserType + 1;

class MyTreeWidget : public QTreeWidget
{
    Q_OBJECT;

public:
    MyTreeWidget()
    {
        setContextMenuPolicy(Qt::CustomContextMenu);

        connect(this,
                SIGNAL(customContextMenuRequested(const QPoint&)),
                SLOT(onCustomContextMenuRequested(const QPoint&)));
    }

private slots:
    void onCustomContextMenuRequested(const QPoint& pos) {
        printf("hi\n");
        QTreeWidgetItem* item = itemAt(pos);

        if (item) {
            // Note: We must map the point to global from the viewport to
            // account for the header.
            showContextMenu(item, viewport()->mapToGlobal(pos));
        }
    }

    void showContextMenu(QTreeWidgetItem* item, const QPoint& globalPos) {
        QMenu menu;

        switch (item->type()) {
            case ItemType1:
                menu.addAction("This is a type 1");
                break;

            case ItemType2:
                menu.addAction("This is a type 2");
                break;
        }

        menu.exec(globalPos);
    }
};

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(ui->treeWidget, SIGNAL(customContextMenuRequested(QPoint)),
            this, SLOT(on_treeWidget_customContextMenuRequested(QPoint)));
}

void MainWindow::on_treeWidget_customContextMenuRequested(const QPoint &pos)
{
      QMenu *menu=new QMenu(this);

      menu->addAction(QString("Copy"), this,SLOT(on_copy()));
     menu->popup(ui->treeWidget->viewport()->mapToGlobal(pos));
}

Спасибо пригодилось.

@sinitcin The action is coming disabled. Whats the method to enable to the action capture?