Package RASCAL.Font

Description	Event definitions and subprograms for handling outline fonts.
Author	bbracke
Date	2005/11/21 20:14:33
Revision	1.1

Clauses

Quick access : Clauses - Generics - Definitions - Subprograms

Context clauses
RASCAL.OS

Use clauses
RASCAL.OS

Definitions

Quick access : Clauses - Generics - Definitions - Subprograms

Types
*Name*	*Declaration*
Font_Handle_Type	new integer
Message_FontChanged_Pointer	access Message_FontChanged

Message_FontChanged	record
This message is bradcasted when the desktop font has changed.
*Component*	*Type*	*Default*
Header	Message_Event_Header

AMEL_Message_Fontchanged	abstract tagged record
inheritance from	Message_EventListener (Message_Event_FontChanged)
*Component*	*Type*	*Default*
Event	Message_FontChanged_Pointer

Pragmas
Convention	(C, Message_FontChanged)

Subprograms

Quick access : Clauses - Generics - Definitions - Subprograms

Millipoints_To_OS	procedure
Converts the coordinates from millipoints to OS units.

*Parameter name*	*Type*	*Mode*	*Default*
X	Integer	in out
Y	Integer	in out

OS_To_Millipoints	procedure
Converts the coordinates from OS units to millipoints.

*Parameter name*	*Type*	*Mode*	*Default*
X	Integer	in out
Y	Integer	in out

Get_StringWidth	procedure
Calculates how wide a string would be under the given limits.

*Parameter name*	*Type*	*Mode*	*Default*
Text	String	in
Width	Integer	in out
Height	Integer	in out
Length	Integer	in out

Truncate	function
*Return*	String
Truncate the string to the given limits.

*Parameter name*	*Type*	*Mode*	*Default*
Text	String	in
Width	Integer	in
Height	Integer	in
Length	Integer	in
Right	boolean	in

Enumerate_Characters	procedure
This call can be used to determine which characters are present in a font, and which glyphs in the underlying font file characters map to. This call works only by looking at encoding files - it cannot guarantee that a given character is actually defined in a font file, but it can say which characters definitely aren't, by returning with R2 set to -1.

*Parameter name*	*Type*	*Mode*	*Default*
Font	Integer	in
Char	Integer	in out
Code	Integer	out