Keep focus on QTextEdit while clicking toggle button on multiple QTextEdit windows

Asimov

Ok I want to setup multiple QTextedt windows, and buttons like bold,italic etc.

Now this is the problem I have cheated, but it works, but this won't work on multiple QTextedits.
You see the problem is that when you click on the toggle button you use lose focus.
Now I have got around this on one window by re-focusing on the QTextedit window.

eg

void MainWindow::on_pushButton_3_toggled(bool checked)
{
    if(checked==true){
        ui->textEdit->setFontWeight(QFont::DemiBold);
    }else{
        ui->textEdit->setFontWeight(QFont::Normal);
    }
    ui->textEdit->setFocus();
}

But I want to use the same button on multiple QTextviews.
The above code will only work on one single QTextedit called textEdit.

I wonder if there is a way to get the last object that lost focus when you click on a toggle button.
This way I can set the font to bold on multiple QTextedit windows, rather than hard coding in a single Qtextview like I have here.

I don't really want to use multiple buttons, but have one button strip that can be use for more than one text view.

mpergand

Maybe by setting the focus to NoFocus in Qt Designer or by code :

toggleButton->setFocus(Qt::NoFocus);

Asimov

@mpergand
Great that has answered half my question. This really works cool

Now all I have to do is to get the window that has focus. I think I found the command to do it, but don't think I am doing it right.

QWidget * thing = qApp->focusWidget();

Instead of

ui->textEdit->setFontWeight(QFont::DemiBold);

I thought I could do this, but it doesn't work

thing->setFontWeight(QFont::DemiBold);

So I thought I could do something like this

   QWidget * thing = qApp->focusWidget();
    if(checked==true){
       thing->setFontWeight(QFont::DemiBold);
    }else{
        thing->setFontWeight(QFont::Normal);
    }

But thing should be the textEdit window, but why I can't I do thing->setFontWeight.

mpergand

you need qobject_cast
Have a look at the doc.

Asimov

This post is deleted!

Asimov

@mpergand
Hey I got it to work thanks.
It took some time because I always find that the docs tell you everything, but what you want to know LOL.
Anyway here is my code now

void MainWindow::on_pushButton_3_toggled(bool checked)
{
    QWidget * thing = qApp->focusWidget();
    QTextEdit *test = qobject_cast<QTextEdit *>(thing);
    if(checked==true){
        test->setFontWeight(QFont::DemiBold);
    }else{
        test->setFontWeight(QFont::Normal);
    }
}

I might set up QWidget and the QTextEdit variables in the header file later so they not constantly being recreated, but basically it works, and I might pick better variable names LOL.

Thanks I can now make text bold in 2 QTextEdit windows.

mpergand

It's advisable to check the value of a dynamic cast/qobject cast because it can be null if the object cannot be converted to the specified type.

Asimov

@mpergand
I think this will do the trick, thanks;

QWidget * thing = qApp->focusWidget();
    QTextEdit *test = qobject_cast<QTextEdit *>(thing);
    if(test!=NULL){
        if(checked==true){
            test->setFontWeight(QFont::DemiBold);
        }else{
            test->setFontWeight(QFont::Normal);
        }
    }