In qt, is there a way to write on the perimeter of a circle?

[aminM]

I want to have a label that is curved, like the picture below. Is there such a possibility with qt widgets

[sierdzio]

You can do it but using custom QPainter code in a widget (same in QML). There is no built-in widget for this, as far as I'm aware.

[hskoglund]

Hi, you can use widgets for a simple rotation, start with an empty vanilla Qt Widgets app, then change your mainwindow.cpp to look like this:

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

#include "qgraphicsview.h"
#include "qgraphicsscene.h"
#include "qgraphicsproxywidget.h"
#include "qlabel.h"

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    auto graphicsView = new QGraphicsView(ui->centralwidget);
    graphicsView->setGeometry(0,0,width(),height());
    auto scene = new QGraphicsScene(this);

    auto diameter = qMin(graphicsView->width(),graphicsView->height()) / 1.2;
    QString s = "Now is the time for all good men to come to the aid of the party.";
    for (int i = 0; (i < s.length()); ++i)
    {
        auto c = s[i];
        if (' ' == c)   // skip blanks
            continue;

        QGraphicsProxyWidget* w = scene->addWidget(new QLabel(c));
        
        auto turn90 = i - s.size() / 4;
        auto rotRadians = (turn90 * 2 * 3.141592653) / s.length();
        w->setPos(diameter * cos(rotRadians) / 2,diameter * sin(rotRadians) / 2);
        auto rotDegrees = (i * 360) / s.length();
        w->setRotation(rotDegrees);
    }
    graphicsView->setScene(scene);
}

MainWindow::~MainWindow()
{
    delete ui;
}

running it:

Edit: forgot to include the code to add the QGraphicsView to the mainwidget, now ok :-)

[aminM]

@hskoglund thanks so much