RV: [Ndk-xx-devel] start of the work

[Miguel P. <ob...@sa...>]

Sorry, I sent it from the wrong account and bounced...
Regards,
Miguel

> 
> Hi.
> The simplest way to understand it is by running the ndk_demo from ddd
or
> any similar debugger, but I will try to explain it:
> 
> The binding stuff is a shameless downsized copy of the way MFC works.
> 
> Basicaly you:
> 
> 1) - Add the DECLARE_BINDINGS macro to the class declaration body,
> 2) - Add the BEGIN_BINDINGS macro on the implementation file, passing
the
> class name and it?s parent class name.
> 3) - insert the corresponding
> ON_COMMAND/ON_NOTIFY/ON_COMMAND_RANGE/ON_NOTIFY_RANGE
> entries.
> 4) - Close the list with the END_BINDINGS macro.
> 
> Here is the implementation of the bindings for DialogBox:
> BEGIN_BINDINGS(DialogBox,Control)
> 	ON_COMMAND(IDOK,DialogBox::on_dlg_ok)
> 	ON_COMMAND(IDYES,DialogBox::on_dlg_yes)
> 	ON_COMMAND(IDNO,DialogBox::on_dlg_no)
> 	ON_COMMAND(IDCANCEL,DialogBox::on_dlg_cancel)
> END_BINDINGS()
> 
> 
> These declarations are used by the process_message function to walk
thru
> the table of bindings of each class searching a compliant
event/control_id
> pair  (or any event/control par in a range, if you use
ON_NOTIFY_RANGE) if
> it?s an event (ON_NOTIFY_xxx) or for a comforming command ID if it?s
> ON_COMMANDxxxx.
>  If it find one, then executes the associated function.
> Exausted the list, if the parent?s list isn?t null, it will go up and
> continue,
> searching the parent?s list, and if it?s parent?s list is not null it
will
> go there, allowing you to fake inheritance for event consumption.
> This is done in Control::process_message static function.
> 
> The macros only hide the textual complexity of declaring each table
and
> each
> entry.
> 
> This apparatus is used on ndk_demo to update the editor when you click
on
> any list, or to know which element of the first list to delete based
on
> the
> selection of the radio buttons on the second (first,last, middle).
> 
> You can see it at work there...
> 
> Hope this helps,
> else let me know and I will go into more details...
> 
> Best regards
> Miguel
> 
> Miguel Jose Pinkas
> Fabrica de Software XXI S.R.L.
> mi...@la...
> ICQ#32064148
> 
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