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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2010-2013, 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. --
-- --
-----------------------------------------------------------------------
with Ada.Numerics;
with Ada.Text_IO; use Ada.Text_IO;
with Glib; use Glib;
with Glib.Object; use Glib.Object;
with Gtk.Box; use Gtk.Box;
with Gtk.Enums; use Gtk.Enums;
with Gtk.Frame; use Gtk.Frame;
with Gtk.Page_Setup; use Gtk.Page_Setup;
with Gtk.Paper_Size; use Gtk.Paper_Size;
with Gtk.Print_Context; use Gtk.Print_Context;
with Gtk.Print_Operation; use Gtk.Print_Operation;
with Gtk.Window; use Gtk.Window;
with Gtkada.Printing; use Gtkada.Printing;
with Cairo; use Cairo;
package body Create_Print is
type Print_Op_Record is new Gtkada_Print_Operation_Record with null record;
type Print_Op_Access is access all Print_Op_Record'Class;
procedure Request_Page_Setup
(Print_Operation : access Print_Op_Record;
Context : Gtk_Print_Context;
Page_Num : Gint;
Setup : Gtk_Page_Setup);
-- (Overriding) Callback to setup page layout when printing.
procedure Draw_Page
(Print_Operation : access Print_Op_Record;
Context : Gtk_Print_Context;
Page_Num : Gint);
-- (Overriding) Callback to draw the pages as they are being printed.
----------
-- Help --
----------
function Help return String is
begin
return "This is a very simple demo to demonstrate GtkAda's high-level,"
& " portable printing API. On some platforms, Gtkada_Print_Operation"
& " uses the native print dialog. On platforms which do not provide"
& " a native print dialog, GtkAda uses GTK+'s own.";
end Help;
---------------
-- Draw_Page --
---------------
procedure Draw_Page
(Print_Operation : access Print_Op_Record;
Context : Gtk_Print_Context;
Page_Num : Gint)
is
pragma Unreferenced (Print_Operation);
pragma Unreferenced (Page_Num);
Cr : Cairo_Context;
X, Y, Z : Gdouble;
begin
Cr := Get_Cairo_Context (Context);
-- Draw a thin light gray bar, as wide as the paper, inside the margins
Set_Source_Rgb (Cr, 0.8, 0.8, 0.8);
Rectangle
(Cr => Cr,
X => 0.0,
Y => 0.0,
Width => Get_Width (Context),
Height => 0.2);
Cairo.Fill (Cr);
-- Circles
for Xi in 1 .. 10 loop
X := Gdouble (Xi) / 10.0;
for Yi in 1 .. 10 loop
Y := Gdouble (Yi) / 10.0;
for Zi in 1 .. 10 loop
Z := Gdouble (Zi) / 10.0;
Set_Source_Rgb (Cr, X, Y, Z);
Arc
(Cr => Cr,
Xc => 2.5 + X * 3.0,
Yc => 1.0 + Y * 3.0,
Radius => 0.2,
Angle1 => 2.0 * Ada.Numerics.Pi * (Z - 0.1),
Angle2 => 2.0 * Ada.Numerics.Pi * Z);
Set_Line_Width (Cr, 1.0 / 32.0);
Cairo.Stroke (Cr);
end loop;
end loop;
end loop;
-- Draw some lines
Move_To (Cr, 2.0, 0.5);
Curve_To (Cr, 2.0, 1.5, 6.0, -0.5, 6.2, 0.5);
Line_To (Cr, 6.2, 4.75);
Curve_To (Cr, 6.2, 3.75, 2.0, 5.75, 2.0, 4.75);
Close_Path (Cr);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Set_Line_Width (Cr, 1.0/16.0);
Set_Line_Cap (Cr, Cairo_Line_Cap_Round);
Set_Line_Join (Cr, Cairo_Line_Join_Round);
Cairo.Stroke (Cr);
end Draw_Page;
------------------------
-- Request_Page_Setup --
------------------------
procedure Request_Page_Setup
(Print_Operation : access Print_Op_Record;
Context : Gtk_Print_Context;
Page_Num : Gint;
Setup : Gtk_Page_Setup)
is
pragma Unreferenced (Print_Operation);
pragma Unreferenced (Context);
A5_Size : Gtk_Paper_Size;
begin
-- Make the second page landscape mode A5
if Page_Num = 1 then
Gtk_New (A5_Size, Gtk_Paper_Name_A5);
Set_Orientation (Setup, Page_Orientation_Landscape);
Set_Paper_Size (Setup, A5_Size);
Free (A5_Size);
end if;
end Request_Page_Setup;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Box : Gtk_Box;
Print_Op : Print_Op_Access;
Result : Gtk_Print_Operation_Result;
begin
Set_Label (Frame, "Printing");
Gtk_New_Vbox (Box, Homogeneous => False);
Add (Frame, Box);
-- Set up print operation basics
Print_Op := new Print_Op_Record;
Gtkada.Printing.Initialize (Print_Op);
Set_Current_Page (Print_Op, 1);
Set_N_Pages (Print_Op, 2);
Set_Unit (Print_Op, Inch);
-- Call up the print operation dialog
Result := Connect_And_Run
(Print_Op, Action_Print_Dialog, Gtk_Window (Get_Toplevel (Frame)));
Put_Line ("Result is " & Result'Img);
Put_Line ("Print status: " & Get_Status (Print_Op));
Show_All (Frame);
end Run;
end Create_Print;
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