Contextmenu in QTreeView

[developer_61]

Hello !
I want use a context menu in the QTreeView. So if i'm going to rightlick an element in the Tree i want to chose between actions.
I tried following:

ui->tree->setContextMenuPolicy(Qt::CustomContextMenu);
connect(ui->tree, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(showContextMenu(const QPoint&))); 

void MainWindow::showContextMenu(const QPoint& pos)
{

  auto contextMenu = new QMenu(ui->tree);
  contextMenu->addAction("Uninstall TA", this, SLOT(uninstallAppletClickedSlot()));

  QModelIndex index = ui->tree->indexAt(pos);
  if (index.isValid() && index.row() % 2 == 0) {
    contextMenu->exec(ui->tree->viewport()->mapToGlobal(pos));
  }
} 

But i get nothing.
Ideas?

[mrjj]

Hi
well its either index that is not valid or (index.row() % 2 == 0) is not true

rest of code looks good.

try

 if ( true /*index.isValid() && index.row() % 2 == 0*/) {
    contextMenu->exec(ui->tree->viewport()->mapToGlobal(pos));
  }

and see if it pops.

also. you create a new menu each time. You could move it as a member to avoid this.

[developer_61]

@mrjj i tried the debugger, i don't even get into the function.

[mrjj]

@developer_61

ok?
Did you check that connect returns true ?

[developer_61]

@mrjj right problem solved. I got true now. Problem was with the syntax. Thank You.

[mrjj]

@developer_61

Super.
Can you tell what it was for me as i didnt spot it :(

[ManjunathXI]

Hi,
First enable custom context menu by using below code and connect the slot

ui->treeView->setContextMenuPolicy( Qt::CustomContextMenu );
connect(ui->treeView, SIGNAL(customContextMenuRequested(QPoint)),this,SLOT(ShowContextMenuMessage(QPoint)));

In slot create menu and pop up the menu in mouse position like this

void Mainwindow::ShowContextMenuMessage(QPoint p)
{
QMenu *menu = new QMenu("menu",ui->treeView_Messages);
menu->addAction(QIcon(":/new/prefix1/Icons/add.ico"),"Add Tag",this,SLOT(addNewTag()));
menu->popup(QCursor::pos());
menu->exec();
}

[developer_61]

@mrjj sure :). I spot that there is another syntax for the connect function with &.
i use:

connect(ui->tree,&QWidget::customContextMenuRequested ,this, &MainWindow::showContextMenu);

and it works fine.
I think you would spot it easy if you would see the whole code.

@ManjunathXI thank you already solved!