L_VecSetFontMapper

Summary

Sets a font mapper for the vector handle. A font mapper is a callback function which is invoked when adding a new font to the resource list of the vector toolkit. Using the callback, the user can modify or replace the font before allowing the toolkit to use it.

Syntax

L_LVKRN_API L_INT L_VecSetFontMapper(pVector, pFontMapper, pUserData);

Parameters

pVECTORHANDLE pVector

Pointer to the vector handle for which to set the font mapper.

pVECTORFONTMAPPERCALLBACK pFontMapper

Pointer to a callback function used to handle the font mapping. It allows the user to modify the contents of the font resource before adding it to the list of fonts maintained by the Vector toolkit. The callback function must adhere to the VECTORFONTMAPPERCALLBACK prototype.

L_VOID * pUserData

Void pointer that you can use to pass one or more additional parameters that the callback function needs.To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure.If the additional parameters are not needed, you can pass NULL in this parameter.

Returns

Required DLLs and Libraries

• LTVKRN
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions

• L_VecGetFontMapper
• pVECTORFONTMAPPERCALLBACK

Topics

• Mapping Fonts
• Handling Font Mappers

Example

L_INT EXT_CALLBACK myFontMapperCB( 
   pVECTORHANDLE pVector, 
   LPLOGFONT pLogFont, 
   L_VOID* pUserData) 
{ 
   UNREFERENCED_PARAMETER(pVector); 
   /* pUserData points to "Arial" .. copy it to pLogFont->lfFaceName to force the toolkit 
      to render all fonts as Arial */ 
 
   if( lstrcmp( pLogFont->lfFaceName, (L_TCHAR *)pUserData ) == 0 ) 
   { 
      lstrcpy( pLogFont->lfFaceName, TEXT("Times New Roman")); 
   } 
 
   return SUCCESS; 
} 
 
L_LTVKRNTEX_API L_INT VecSetFontMapperExample(pVECTORHANDLE pVector) 
{ 
   L_INT nRet; 
   pVECTORFONTMAPPERCALLBACK  pTempMapper; 
 
   nRet = L_VecGetFontMapper( pVector, &pTempMapper ); 
 
   if( NULL == pTempMapper ) 
      nRet = L_VecSetFontMapper(pVector, myFontMapperCB, TEXT("Arial")); 
 
   return nRet; 
}