QFontMetrics
QFontMetrics is a class in the Qt framework that provides font metrics information. This information allows applications to query properties of a font, such as its height, width, and spacing. Developers can use QFontMetrics to accurately determine the dimensions of text when rendering it on screen or in print. This is crucial for tasks like text layout, cursor positioning, and calculating the necessary space for text elements.
Key metrics obtainable from QFontMetrics include ascent, descent, leading, and average character width. Ascent refers to
To use QFontMetrics, an instance of the class is typically created using a QFont object. For example,