[WASTE-list] Text Filter callback

[Brother Josef]

I was using the filter to operate on key codes but I never did learn  
how to get a ASCII character from a UniChar in a decent way. I know I  
could wrap it into a CFString and convert the character from there,  
but that's a lot of code for such a simple operation. that snippet  
seems to accomplish that but i'm not sure what "reinterpret_cast" is.  
Is there a common utility for this? thanks again.

On Oct 14, 2007, at 8:11 PM, Alfred Van Hoek wrote:


>

> On Oct 14, 2007, at 8:26 AM, Brother Josef wrote:

>

>> It was my understanding that returning false from the text filter  

>> hook would prevent WASTE from inserting the character but my  

>> callback is not producing these results. If that is not the usage  

>> of the callback how can I achieve these effects? thank you.

>>

>> Regards,

>>         Josef

>>

>

>

> returning true should tell WASTE to not insert the text, example:

>

>

> 	// special case

>     if ( GetHandleSize ( inFilterableText ) == sizeof ( UniChar ) &&

>          * reinterpret_cast < const UniChar * > ( *  

> inFilterableText ) == '\t' )

>

>

> 			// we need to make sure Waste is not handling the tab key input

> 			// in order to do so we need not only return true, telling Waste

> 			// we have handled it, but also we need to set the handle size to

> 			// zero. This will ensure that the your runtime can handle the  

> tab key

> 			// event. In this case, advancing the focus.

>

> 			SetHandleSize(inFilterableText, 0);

>

> 			return true;

>

> Alfred


Regards,
         Josef



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