How include "qfont" in "qlabel" ??

[timob256]

I can't understand why I can't transfer the font to the label

.h

#include <QFont>

...
class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

...
    // подстраиваемый шрифт label
    QFont* font;
    int height_monitor {0};
    int width_monitor  {0};

...

}

.cpp

#include "mainwindow.h"
#include "./ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    // тут настраиваю и объявляю элементы

    font = new QFont();
    ...
}


void MainWindow::resizeEvent(QResizeEvent *e)
{
      height_monitor= e->size().height();
      width_monitor = e->size().width();

      font->setPointSize((height_monitor*width_monitor)/4);
      
      ui->label->setFont(font);  // вот тут не работает !!!!!
}

[jsulm]

@timob256 said in How include "qfont" in "qlabel" ??:

I did not understand which command to write to make it work

Open documentation for setFont: https://doc.qt.io/qt-6/qwidget.html#font-prop
As you can clearly see setFont does not take a pointer to QFont, but you're trying to give it a pointer. This is basic C++ knowledge.
Change to:

ui->label->setFont(*font);

Or, even better, don't declare font as pointer...

[SGaist]

Hi,

Because you declare and try to use a pointer to a QFont object while setFont takes an object.

[timob256]

@SGaist hello, Alas , I did not understand which command to write to make it work .😞

[JonB]

@timob256 Don't you get a compiler error on statement ui->label->setFont(font); which tells you what is wrong?

[jsulm]

@timob256 said in How include "qfont" in "qlabel" ??:

I did not understand which command to write to make it work

Open documentation for setFont: https://doc.qt.io/qt-6/qwidget.html#font-prop
As you can clearly see setFont does not take a pointer to QFont, but you're trying to give it a pointer. This is basic C++ knowledge.
Change to:

ui->label->setFont(*font);

Or, even better, don't declare font as pointer...