Web Reference: The size (width and height) of a QRectF is always equivalent to the mathematical rectangle that forms the basis for its rendering. A QRectF can be constructed with a set of left, top, width and height coordinates, or from a QPointF and a QSizeF. The following code creates two identical rectangles. Sep 22, 2025 · Before we dive into the problems, let's quickly recap what QRectF does. It represents a rectangle in 2D space using floating-point coordinates. It's perfect for graphics and geometry because it allows for precision that integer-based rectangles like QRect can't provide. Constructs a QRectF rectangle from the given QRect rectangle. See also toRect() and QRect::toRectF().
YouTube Excerpt: C++ Qt 75 QRect and QBrush
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