QT QSS EXAMPLE CODE

A style sheet consists of style rules that affect the rendering of a widget. Qt style sheets are strongly inspired by CSS but adapted to work on widgets. To keep the examples to a manageable size, both styles focus on a carefully chosen subset of Qt's widgets.ДЇigure 19.1 The custom styles presented in this chapter Using Qt Style Sheets We will present two custom styles: the Candy style, specified as a style sheet, and the Bronze style, implemented as a QStyle subclass (see Figure 19.1). In this chapter, we will review the last two approaches. We have already covered the techniques required for the first approach, in Chapters 5 and 7, although our emphasis was on creating custom widgets. Since style sheets are plain text files that are interpreted at run-time, no knowledge of programming is required to use them. Starting with Qt 4.2, we can use Qt style sheets, a mechanism inspired by HTML CSS (Cascading Style Sheets).This approach is very powerful it is used by Qt itself to provide a native look and feel on the different platforms it supports. We can subclass QStyle or a predefined style such as QWindowsStyle.

QT QSS EXAMPLE CODE

It also means that we must go through all of our code and Qt Designer forms and change all occurrences of Qt widget classes to use our subclasses. This gives complete control but involves a lot of work. We can subclass the individual widget classes and reimplement their paint and mouse event handlers.In either case, there are three main approaches to redefining the look of Qt's built-in widgets: We may only want to do some minor customizations to tweak the aesthetics slightly, or we may wish to implement an entirely new style, to give our application or suite of applications a unique and distinctive appearance. In some circumstances, we might want to change the look and feel of Qt's built-in widgets. C++ GUI Programming with Qt4, 2nd Edition

Qt qss example