 |  | boxes-keys |  |
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-- $Date: 2004/03/08 10:42:42 $
-- $Revision: 1.6 $
-- $Author: jcrocholl $
-- $Hash: e5e0ee4e3d1e3e28cfdb3447fe4d2542 $
-- This file was automatically created with ado.php.
-- Manual changes will be lost when it is updated.
with Ada.Tags; use Ada.Tags;
with Font_Loaders; use Font_Loaders;
with Choices; use Choices;
with Glyphs; use Glyphs;
with Keys; use Keys;
package Boxes.Keys is
subtype Accidentals is Positive range 1 .. 7;
type Glyph_Array is array(Accidentals) of Glyph_Access;
type Integer_Array is array(Accidentals) of Integer;
-- Public representation.
type Key_Box is new Box with private;
-- Work-around for GNAT bug.
Key_Box_Tag : constant String;
-- Pointer to representation data.
type Key_Box_Access is access all Key_Box;
-- Constructor for instances.
function Create
(Key : in Key_Access; -- The initial key.
Middle_C : in Integer) -- The initial middle c.
return Key_Box_Access; -- The newly created key box.
-- Accessor to read the key of a key box.
function Get_Key
(This : access Key_Box) -- The key box to read from.
return Key_Access; -- The key of that key box.
-- Accessor to read the middle c of a key box.
function Get_Middle_C
(This : access Key_Box) -- The key box to read from.
return Integer; -- The middle c of that key box.
function Get_Center
(This : access Key_Box; -- The key box object instance.
Index : in Accidentals) -- Which accidental position?
return Vector; -- Display offset for proper placement.
procedure Layout
(This : access Key_Box; -- The key box object instance.
Font : access Font_Loader); -- Use this font loader.
procedure Print
(This : access Key_Box; -- The key box object instance.
To : access Printer'Class; -- Render to this printer.
Center : in Vector); -- Center of container.
private
-- Private representation.
type Key_Box is
new Box with
record
Key : Key_Access; -- The key signature in this box.
Middle_C : Integer; -- Relative to middle staff line.
Glyphs : Glyph_Array; -- The glyphs for the accidentals.
Offsets : Integer_Array; -- Vertical offsets for accidentals.
end record;
-- Work-around for GNAT bug.
Key_Box_Tag : constant String := "boxes.keys.key_box";
end Boxes.Keys;