Blog Post · Qt and its Awesomeness!

Qt and its Awesomeness! ^

Posted On Thursday 29 July 2010 by Tom Leese (TomMan)

I would just like to say a few things about Qt and its awesomeness :p

Ok, so everything in Qt is based around the concept of events. This means that everything from the Window Manager wanting the window to be redrawn, to a mouse button being clicked, to the window being resized is done in events.

Here is some example code of drawing a circle in the middle of the window (200x200) when the window manager wants it.

void MainWindow::paintEvent(QPaintEvent *event)
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);
    QPen pen(Qt::blue, 2);
    QBrush brush(Qt::green);
    painter.drawEllipse(20, 20, 160, 160);