How to change the currentFont in a QTextEdit but leaving the formattation

HenkCoder

I'm currently developing a notepad and I've found a problem. Basically in a QTextEdit I have different text with different point sizes. So if I want to change the font of these ones their point size will reset to the one of the textbox.

I will make an example with images.

before:

enter image description here

after:

As you can see I changed the font to times new roman but the point size changed.

This is the code:

void MainWindow::on_fontComboBox_currentFontChanged(const QFont &f)
{
    ui->fontComboBox->setFont(f);
    QTextEdit *edit = getTabTextEdit();
    if(ui->tabWidget->currentWidget() == ui->tab_1)
    {
        ui->edit->setCurrentFont(f);
    }
    else
    {
        edit->setCurrentFont(f);
    }
}

How can I solve this?

SGaist

Hi,

How did you create the "f" QFont object ?

HenkCoder

@SGaist The QFont object is passed as a parameter in the on_fontComboBox_currentFontChanged() function.
Basically I put a font in the fontComboBox and passees the parameter.

SGaist

That does not answer the question which is how is that font object created ?

From the looks of it, you are not just changing the font name but you are nuking the current one.

What is usually done is grabbing the current font of an object, modify whatever property you want and then apply that modified font on the widget.

HenkCoder

@SGaist Sorry I didn't understand what you said

SGaist

QFont font = widget->font();
font.setFamily("something");
widget->setFont(font);

HenkCoder

@SGaist alright thanks, I'll try it. I'll keep you updated.

HenkCoder

@SGaist
Hello, I tried the code you suggested. And it works yes, but an older problem appears again, this one

SGaist

You should not apply fonts blindingly on QTextEdit if you want to have different fonts there you need to handle that à the document level.

HenkCoder

@SGaist Can you explain more? I don't understand much, sorry I'm a beginner in Qt

SGaist

You are using QTextEdit for custom editing, hence you want to only apply the font to the selected text and not the whole widget.