[Interest] A little question about Qt

Joseph Crowell joseph.w.crowell at gmail.com
Mon Feb 4 09:04:24 CET 2013

On 02/04/2013 11:45 AM, Andres Linares wrote:
> Hi,
> Beforehand I'll introduce myself. My name is Andres Linares, I'm very
> interested into developing using C++ and Qt Framework. I've been reading
> some books and some documentation on the net, so I have a little
> question about GUI support on Qt.
> On a book named "C++ GUI Programming with Qt 4, Second Edition", on page
> 23, it says:
> "Qt applications look native on every supported platform. Qt achieves
> this by emulating the platform's look and feel, rather than wrapping a
> particular platform or toolkit's widget set. "
> but in this post it says:
> "but to achieve true perfection we need to use the Gtk theme engine
> directly just like we do on Mac and Windows."
> So how Qt multiplatform GUI support works? Does it actually wraps
> something from some GUI component (like Cocoa on Mac OS X or WinAPI on
> Windows, considering it says it wraps GTK on GTK-based environments) or
> it just acts like a "mask" on a specific platform (like Java)?

It queries the native theming engine to see what rules it uses to draw a 
widget (colors, images, coordinates etc) and then uses those rules to 
draw it's own widgets. It is not always perfect, but in 98% of cases, it is.

> Thank you, and sorry for my bad english.
> Best wishes,
> Andres Linares
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