[Qt-interest] what is this syntax?

[Donal O'Connor]

It's defining bit fields , 4 bits.

http://en.wikipedia.org/wiki/Bit_field

<http://en.wikipedia.org/wiki/Bit_field>In a class you can access these bits
directly then and assign values or do bit ops.



On Sun, Sep 12, 2010 at 12:07 AM, pmqt71 <pmqt71 at gmail.com> wrote:

> Hi all,
>
> could you tell me what the following statement means? What is : 4after window_state definition?
>
>     uint window_state : 4;
>
>
> I found this syntax in qwidget.h
>
> ...
> class QWidgetData
> {
> public:
>     WId winid;
>     uint widget_attributes;
>     Qt::WindowFlags window_flags;
>     uint window_state : 4;
>     uint focus_policy : 4;
>     uint sizehint_forced :1;
>     ...
>
>
>
> thanks
> pm
>
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>
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