[Qt-interest] qobject_cast Vs dynamic_cast

[程梁]

In my opinion, the best way to understand the implementation signals and
slots is to read source code. You can check the marco SIGNALS and SLOTS. The
SIGNALS makes function name to a string. I found Qt maintains a SIGNAL-SLOT
map. In fact, when Qt found an emit keyword, it will change it to the slot
function.

2010/10/21 Sarvesh Saran <Sarvesh.Saran at synopsys.com>

>  Hi All,
>
>
>
> I am trying to understand the differences between the qobject_cast  and
> dynamic_cast and the advantages offered by qobject_cast.
>
>
>
> According to QT documentation:
>
>
>
> The qobject_cast() function behaves similarly to the standard C++
> dynamic_cast(), with the advantages that it doesn't require RTTI support
> and *it works across dynamic library boundaries*.
>
>
>
> Can someone explain the meaning of the underlined words “it works across
> dynamic library boundaries” ?
>
>
>
> I have another question,  related to signals and slots. I will appreciate
> it if someone can give a conceptual overview of how QT implements signals
> and slots internally?  ( the documentation says that we don’t use templates
> as certain compilers do not support  advanced templates ). I was just
> curious how signals and slots work under the hood.
>
>
>
> Thanks!
>
> Sarvesh
>
>
>
>
>
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>
>


-- 
Cheng Liang
from: chengliang.soft at gmail.com
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