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ncursesw-morphos/Ada95/samples/sample-menu_demo.adb

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ncurses 4.1
1997-05-15 12:00:00 +08:00
------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding Samples --
-- --
-- Sample.Menu_Demo --
-- --
-- B O D Y --
-- --
-- Version 00.92 --
-- --
-- The ncurses Ada95 binding is copyrighted 1996 by --
-- Juergen Pfeifer, Email: Juergen.Pfeifer@T-Online.de --
-- --
-- Permission is hereby granted to reproduce and distribute this --
-- binding by any means and for any fee, whether alone or as part --
-- of a larger distribution, in source or in binary form, PROVIDED --
-- this notice is included with any such distribution, and is not --
-- removed from any of its header files. Mention of ncurses and the --
-- author of this binding in any applications linked with it is --
-- highly appreciated. --
-- --
-- This binding comes AS IS with no warranty, implied or expressed. --
------------------------------------------------------------------------------
-- Version Control
-- $Revision: 1.4 $
------------------------------------------------------------------------------
with Terminal_Interface.Curses; use Terminal_Interface.Curses;
with Terminal_Interface.Curses.Panels; use Terminal_Interface.Curses.Panels;
with Terminal_Interface.Curses.Menus; use Terminal_Interface.Curses.Menus;
with Terminal_Interface.Curses.Menus.Menu_User_Data;
with Terminal_Interface.Curses.Menus.Item_User_Data;
with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
with Sample.Manifest; use Sample.Manifest;
with Sample.Function_Key_Setting; use Sample.Function_Key_Setting;
with Sample.Keyboard_Handler; use Sample.Keyboard_Handler;
with Sample.Menu_Demo.Handler;
with Sample.Helpers; use Sample.Helpers;
with Sample.Explanation; use Sample.Explanation;
package body Sample.Menu_Demo is
package Spacing_Demo is
procedure Spacing_Test;
end Spacing_Demo;
package body Spacing_Demo is
procedure Spacing_Test
is
function My_Driver (M : Menu;
K : Key_Code;
P : Panel) return Boolean;
procedure Set_Option_Key;
procedure Set_Select_Key;
procedure Set_Description_Key;
procedure Set_Hide_Key;
package Mh is new Sample.Menu_Demo.Handler (My_Driver);
I : constant Item_Array (1 .. 12) := (New_Item ("January",
"31 Days"),
New_Item ("February",
"28/29 Days"),
New_Item ("March",
"31 Days"),
New_Item ("April",
"30 Days"),
New_Item ("May",
"31 Days"),
New_Item ("June",
"30 Days"),
New_Item ("July",
"31 Days"),
New_Item ("August",
"31 Days"),
New_Item ("September",
"30 Days"),
New_Item ("October",
"31 Days"),
New_Item ("November",
"30 Days"),
New_Item ("December",
"31 Days"));
M : Menu := New_Menu (I);
Flip_State : Boolean := True;
Hide_Long : Boolean := False;
type Format_Code is (Four_By_1, Four_By_2, Four_By_3);
type Operations is (Flip, Reorder, Reformat, Reselect, Describe);
type Change is array (Operations) of Boolean;
pragma Pack (Change);
No_Change : constant Change := Change'(others => False);
Current_Format : Format_Code := Four_By_1;
To_Change : Change := No_Change;
function My_Driver (M : Menu;
K : Key_Code;
P : Panel) return Boolean
is
begin
To_Change := No_Change;
if K in User_Key_Code'Range then
if K = QUIT then
return True;
end if;
end if;
if K in Special_Key_Code'Range then
case K is
when Key_F4 =>
To_Change (Flip) := True;
return True;
when Key_F5 =>
To_Change (Reformat) := True;
Current_Format := Four_By_1;
return True;
when Key_F6 =>
To_Change (Reformat) := True;
Current_Format := Four_By_2;
return True;
when Key_F7 =>
To_Change (Reformat) := True;
Current_Format := Four_By_3;
return True;
when Key_F8 =>
To_Change (Reorder) := True;
return True;
when Key_F9 =>
To_Change (Reselect) := True;
return True;
when Key_F10 =>
if Current_Format /= Four_By_3 then
To_Change (Describe) := True;
return True;
else
return False;
end if;
when Key_F11 =>
Hide_Long := not Hide_Long;
declare
O : Item_Option_Set;
begin
for J in I'Range loop
Get_Options (I (J), O);
O.Selectable := True;
if Hide_Long then
case J is
when 1 | 3 | 5 | 7 | 8 | 10 | 12 =>
O.Selectable := False;
when others => null;
end case;
end if;
Set_Options (I (J), O);
end loop;
end;
return False;
when others => null;
end case;
end if;
return False;
end My_Driver;
procedure Set_Option_Key
is
O : Menu_Option_Set;
begin
if Current_Format = Four_By_1 then
Set_Soft_Label_Key (8, "");
else
Get_Options (M, O);
if O.Row_Major_Order then
Set_Soft_Label_Key (8, "O-Col");
else
Set_Soft_Label_Key (8, "O-Row");
end if;
end if;
Refresh_Soft_Label_Keys_Without_Update;
end Set_Option_Key;
procedure Set_Select_Key
is
O : Menu_Option_Set;
begin
Get_Options (M, O);
if O.One_Valued then
Set_Soft_Label_Key (9, "Multi");
else
Set_Soft_Label_Key (9, "Singl");
end if;
Refresh_Soft_Label_Keys_Without_Update;
end Set_Select_Key;
procedure Set_Description_Key
is
O : Menu_Option_Set;
begin
if Current_Format = Four_By_3 then
Set_Soft_Label_Key (10, "");
else
Get_Options (M, O);
if O.Show_Descriptions then
Set_Soft_Label_Key (10, "-Desc");
else
Set_Soft_Label_Key (10, "+Desc");
end if;
end if;
Refresh_Soft_Label_Keys_Without_Update;
end Set_Description_Key;
procedure Set_Hide_Key
is
begin
if Hide_Long then
Set_Soft_Label_Key (11, "Enab");
else
Set_Soft_Label_Key (11, "Disab");
end if;
Refresh_Soft_Label_Keys_Without_Update;
end Set_Hide_Key;
begin
Push_Environment ("MENU01");
Notepad ("MENU-PAD01");
Default_Labels;
Set_Soft_Label_Key (4, "Flip");
Set_Soft_Label_Key (5, "4x1");
Set_Soft_Label_Key (6, "4x2");
Set_Soft_Label_Key (7, "4x3");
Set_Option_Key;
Set_Select_Key;
Set_Description_Key;
Set_Hide_Key;
Set_Format (M, 4, 1);
loop
Mh.Drive_Me (M);
exit when To_Change = No_Change;
if To_Change (Flip) then
if Flip_State then
Flip_State := False;
Set_Spacing (M, 3, 2, 0);
else
Flip_State := True;
Set_Spacing (M);
end if;
elsif To_Change (Reformat) then
case Current_Format is
when Four_By_1 => Set_Format (M, 4, 1);
when Four_By_2 => Set_Format (M, 4, 2);
when Four_By_3 =>
declare
O : Menu_Option_Set;
begin
Get_Options (M, O);
O.Show_Descriptions := False;
Set_Options (M, O);
Set_Format (M, 4, 3);
end;
end case;
Set_Option_Key;
Set_Description_Key;
elsif To_Change (Reorder) then
declare
O : Menu_Option_Set;
begin
Get_Options (M, O);
O.Row_Major_Order := not O.Row_Major_Order;
Set_Options (M, O);
Set_Option_Key;
end;
elsif To_Change (Reselect) then
declare
O : Menu_Option_Set;
begin
Get_Options (M, O);
O.One_Valued := not O.One_Valued;
Set_Options (M, O);
Set_Select_Key;
end;
elsif To_Change (Describe) then
declare
O : Menu_Option_Set;
begin
Get_Options (M, O);
O.Show_Descriptions := not O.Show_Descriptions;
Set_Options (M, O);
Set_Description_Key;
end;
else
null;
end if;
end loop;
Set_Spacing (M);
Flip_State := True;
Pop_Environment;
Delete (M);
end Spacing_Test;
end Spacing_Demo;
procedure Demo
is
-- We use this datatype only to test the instantiation of
-- the Menu_User_Data generic package. No functionality
-- behind it.
type User_Data is new Integer;
type User_Data_Access is access User_Data;
-- Those packages are only instantiated to test the usability.
-- No real functionality is shown in the demo.
package MUD is new Menu_User_Data (User_Data, User_Data_Access);
package IUD is new Item_User_Data (User_Data, User_Data_Access);
function My_Driver (M : Menu;
K : Key_Code;
P : Panel) return Boolean;
package Mh is new Sample.Menu_Demo.Handler (My_Driver);
Itm : constant Item_Array (1 .. 2) :=
(New_Item ("Menu Layout Options"),
New_Item ("Demo of Hook functions"));
M : Menu := New_Menu (Itm);
U1 : User_Data_Access := new User_Data'(4711);
U2 : User_Data_Access;
U3 : User_Data_Access := new User_Data'(4712);
U4 : User_Data_Access;
function My_Driver (M : Menu;
K : Key_Code;
P : Panel) return Boolean
is
Idx : constant Positive := Get_Index (Current (M));
begin
if K in User_Key_Code'Range then
if K = QUIT then
return True;
elsif K = SELECT_ITEM then
if Idx in Itm'Range then
Hide (P);
Update_Panels;
end if;
case Idx is
when 1 => Spacing_Demo.Spacing_Test;
when others => Not_Implemented;
end case;
if Idx in Itm'Range then
Top (P);
Show (P);
Update_Panels;
Update_Screen;
end if;
end if;
end if;
return False;
end My_Driver;
begin
Push_Environment ("MENU00");
Notepad ("MENU-PAD00");
Default_Labels;
Refresh_Soft_Label_Keys_Without_Update;
Set_Pad_Character (M, '|');
MUD.Set_User_Data (M, U1);
IUD.Set_User_Data (Itm (1), U3);
Mh.Drive_Me (M);
MUD.Get_User_Data (M, U2);
pragma Assert (U1 = U2 and U1.all = 4711);
IUD.Get_User_Data (Itm (1), U4);
pragma Assert (U3 = U4 and U3.all = 4712);
Pop_Environment;
Delete (M);
end Demo;
end Sample.Menu_Demo;
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