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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 2005 AdaCore --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public --
-- License along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
-- This package implements the notion of tab stops, to be used in the
-- context of a pango.layout or its higher level interface Gtk.Text_View.
--
-- This package allows you to define precise location (in pixels) in the
-- layout on which the <tab> character in the text will be aligned. This
-- allows you to easily align columns of text even when using a proportional
-- font for instance. This is similar to the standard interface that most
-- word processing tools provide through tab stops in their ruler bars.
-- <group>Pango, font handling</group>
with Glib;
package Pango.Tabs is
type Pango_Tab_Array is limited private;
Null_Tab_Array : constant Pango_Tab_Array;
-- This type contains an array of tab stops. Each such stop has an
-- alignment and a position. Several methods are provided to create such
-- an array, either by spacing out the stops regularly, or by positioning
-- them by yourself.
type Pango_Tab_Align is (Pango_Tab_Left);
pragma Convention (C, Pango_Tab_Align);
-- This structure specifies where a tab stop appears relative to the text.
procedure Pango_New
(Tab_Array : out Pango_Tab_Array;
Initial_Size : Glib.Gint;
Positions_In_Pixels : Boolean := True);
-- Create an array of Initial_Size tab stops. The position of these stops
-- will be specified in pixel units if Position_In_Pixels is True, or in
-- Pango units otherwise (see Pango.Enums.Pango_Scale).
-- All stops are initially at position 0.
-- It is legal to create an array of size 0.
function Get_Type return Glib.GType;
-- Return the internal type associated with a Pango_Tab_Array
procedure Copy
(Src : Pango_Tab_Array;
Target : out Pango_Tab_Array);
-- Return a newly allocated copy of Src.
procedure Free (Tab_Array : Pango_Tab_Array);
-- Free the memory occupied by Tab_Array
function Get_Size (Tab_Array : Pango_Tab_Array) return Glib.Gint;
-- Return the number of tab stops in Tab_Array.
procedure Resize
(Tab_Array : Pango_Tab_Array;
New_Size : Glib.Gint);
-- Resize Tab_Array. You must then initialize any stop that was added as a
-- result of growing the array.
procedure Set_Tab
(Tab_Array : Pango_Tab_Array;
Tab_Index : Glib.Gint;
Alignment : Pango_Tab_Align := Pango_Tab_Left;
Location : Glib.Gint);
-- Set the alignment and location of a tab stop.
-- Location is either in pixel units or in pango units, depending on how
-- Tab_Array was created.
-- Tab_Index starts at 0.
procedure Get_Tab
(Tab_Array : Pango_Tab_Array;
Tab_Index : Glib.Gint;
Alignment : out Pango_Tab_Align;
Location : out Glib.Gint);
-- Return the alignment and location of a tab stop.
-- Tab_Index starts at 0.
function Get_Positions_In_Pixels
(Tab_Array : Pango_Tab_Array) return Boolean;
-- Whether the position of tab stops is in pixel units, or in pango units.
private
type Pango_Tab_Array is new Glib.C_Proxy;
Null_Tab_Array : constant Pango_Tab_Array := null;
pragma Import (C, Get_Type, "pango_tab_array_get_type");
pragma Import (C, Free, "pango_tab_array_free");
pragma Import (C, Get_Size, "pango_tab_array_get_size");
pragma Import (C, Resize, "pango_tab_array_resize");
pragma Import (C, Set_Tab, "pango_tab_array_set_tab");
pragma Import (C, Get_Tab, "pango_tab_array_get_tab");
end Pango.Tabs;
-- missing:
-- pango_tab_array_new_with_positions
-- pango_tab_array_get_tabs
|
