Right Click on a cell to copy the content of it

hubeytqew

I have a table created with QTableWidget. I want to copy the cell's content (data) with right click. I've searched the web but haven't found anything that works for the right click event. How can I achieve this?

mpergand

@hubeytqew
Using a context menu should work:

ui->tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);
   connect(ui->tableWidget, &QWidget::customContextMenuRequested,this,[this] ()
   {
       QList<QTableWidgetItem *> items=ui->tableWidget->selectedItems();
       if(items.count()>0)
           qDebug()<<items[0]->text();

   });

JonB

@hubeytqew said in Right Click on a cell to copy the content of it:

I've searched the web but haven't found anything that works for the right click event.

I don't know whether this is the best or only way, but every widget has a mousePressEvent(QMouseEvent *event). Overriding that you can inspect whether it's a right button and QTableWidgetItem *QTableWidget::itemAt(const QPoint &point) const can tell you which item it's on.

hubeytqew

@JonB
Now, I catch right click in the app with below code.

void manager::mousePressEvent(QMouseEvent *e)
{
    if (e->button() == Qt::RightButton)
    {
        qDebug() << "hi!";
    }
}

But it can not catch right click on the QTableWidget. How do I catch the right click on the table?

JonB

@hubeytqew
By doing this on the QTableWidget? I have no idea what manager might be....

hubeytqew

@JonB

manager is the cpp file name. I use this right click event in manager cpp code. So this is the file name..

for example, I use cellClicked function which belongs to QTableWidget;

connect(ui->tableWidget, &QTableWidget::cellClicked, this, &manager::cellClicked);

If I click the cell, function do some jobs in that cell..as you can see, manager is the file name.
Whatever, I can use it for the one click. Thats ok. I want to handle right click.

JonB

@hubeytqew
You want to know about mouse presses on the QTableWidget, right? So manager::mousePressEvent() on manager is not the right thing.

You need to subclass Qt's QTableWidget to produce your own derived class and then in that you can override the mousePressEvent() method like you showed --- but not on whatever manager is. And you will not be using signals & slots here, only overriding mousePressEvent(). I don't think you can use any of the clicked signals as I believe they are only generated for left-click, not right-click?

Christian Ehrlicher

clicked() is only emitted for Qt::LeftButton, pressed() for all buttons. activated() is emitted for all buttons when the style hint SH_ItemView_ActivateItemOnSingleClick is enabled.

JonB

@Christian-Ehrlicher , @hubeytqew
Which I think implies you will indeed need to go for overriding the mousePressEvent() as suggested previously.

BTW, if you don't want to subclass and override, I presume you could instead use void QObject::installEventFilter(QObject *filterObj) and get a mouse press event where you can test for right button, though I haven't tested.

mpergand

@hubeytqew
Using a context menu should work:

ui->tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);
   connect(ui->tableWidget, &QWidget::customContextMenuRequested,this,[this] ()
   {
       QList<QTableWidgetItem *> items=ui->tableWidget->selectedItems();
       if(items.count()>0)
           qDebug()<<items[0]->text();

   });

JonB

@mpergand
I agree this is nice "simple" code, but it has flaws, does it not, for "Right Click on a cell to copy the content of it"? Examples: table widget set to not allow selection or set to allow multi-cell selection?