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Length: 16384 (0x4000)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, generic, package Spreadsheet_Generic, seg_004665
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─ ⟦5a81ac88f⟧ »Space Info Vol 1«
└─⟦this⟧
--| @SUMMARY Provide tool and engine to build a small spreadsheet-like
--| application using Window_IO.
--|
generic -- package Spreadsheet
-- Grid definition
--
type Line_Type is (<>);
type Column_Type is (<>);
-- Name used in default file name and on the window name
--
Default_Name : in String := "Spreadsheet";
Application_Version : in String := "";
package Spreadsheet_Generic is
Spreadsheet_Version : constant String := "Rev2.0";
--| @DESCRIPTION Application interface to access the display
--|
function Current_Line return Line_Type;
function Current_Column return Column_Type;
procedure Set (L : Line_Type := Current_Line;
C : Column_Type := Current_Column;
To_String : String;
Immediately_Shown : Boolean := False);
procedure Set_And_Show (L : Line_Type;
C : Column_Type;
To_String : String;
Immediately_Shown : Boolean := True) renames Set;
function Get (L : Line_Type := Current_Line;
C : Column_Type := Current_Column) return String;
function Width (C : Column_Type := Current_Column) return Positive;
--| @DESCRIPTION A few utilities to help build the application
--|
package Tool_Set is
-- String utilities
--
function "*" (Width : Integer; C : Character) return String;
function Left_Align (S : String; Width : Natural) return String;
function Right_Align (S : String; Width : Natural) return String;
function Center (S : String; Width : Natural) return String;
function Capitalize (S : String) return String;
-- Expression evaluators : any level of parenthesing, 4 arithmetic
-- operations
--
function Integer_Value (Expression : String) return Integer;
--
-- this one accept both Integers and Floats
function Float_Value (Expression : String) return Float;
-- Formatting utilities
--
function Image (F : Float;
Width : Natural;
Aft : Natural := 2;
Exp : Natural := 0;
Blank_If_Zero : Boolean := False) return String;
function Image (I : Integer;
Width : Natural;
K_Or_M_Suffix : Boolean := False;
Blank_If_Zero : Boolean := False) return String;
-- Queries the user in standard i/o window
--
function Ask_For (Question : String) return String;
-- Reporting small errors and attracting attention
--
procedure Alert (S : String; Beeps : Natural := 2);
procedure Beep (S : String := ""; Beeps : Natural := 1) renames Alert;
procedure Echo_Line (S : String; Beeps : Natural := 0) renames Alert;
end Tool_Set;
--------------------------------------------------------------
--
-- Default subprograms for Engine instantiation:
--
function All_Columns_Equal (C : Column_Type) return Positive;
function All_Modifiable (L : Line_Type; C : Column_Type) return Boolean;
function Not_Selected (L : Line_Type; C : Column_Type) return Boolean;
function No_Help return String;
function No_Definition (L : Line_Type; C : Column_Type) return String;
function No_Message return String;
procedure Up_And_Left_Border; -- uses Line_Type and Column_Type
procedure Upper_Left_Corner (L : out Line_Type; C : out Column_Type);
function No_File_Name return String; -- returns "<None>"
function Default_File_Name return String;-- returns "<Default>"
procedure Noop;
--
-----------------------------------------------------------------
--| @DESCRIPTION This is the real stuff: the engine of the spreadsheet.
--
generic
-- 1. Compulsory parameters (must be provided by application)
--
with procedure Compute;
with procedure Feed (L : Line_Type;
C : Column_Type;
Data : String;
Valid : out Boolean);
-- 2. Optional parameters (default to nil or minimal functionality)
--
---- 2.1 grid definition
--
with procedure Initialize is Up_And_Left_Border;
with procedure Home_Position (L : out Line_Type; C : out Column_Type) is
Upper_Left_Corner;
with function Column_Width (C : Column_Type) return Positive is
All_Columns_Equal;
with function Is_Modifiable
(L : Line_Type; C : Column_Type) return Boolean is
All_Modifiable;
with function Is_Selected
(L : Line_Type; C : Column_Type) return Boolean is
Not_Selected;
with function Edit_Prompt
(L : Line_Type; C : Column_Type) return String is Get;
--
---- 2.2 Help features
--
with function Definition
(L : Line_Type; C : Column_Type) return String is
No_Definition;
with function Help return String is No_Help;
with function Diagnosis return String is No_Message;
--
---- 2.3 Input-Output
--
with function Save_File_Name return String is Default_File_Name;
with function Load_File_Name return String is No_File_Name;
--
---- 2.4 Application defined command
--
with procedure Command is Noop;
--
---- 2.5 Engine behaviour parameters
--
Moving_Cursor_Also_Commits : in Boolean := True;
Committing_Also_Computes : in Boolean := False;
Computing_Also_Reformats : in Boolean := False;
procedure Engine (Window_Name : String := Default_Name;
Initial_File_To_Load : String := No_File_Name);
end Spreadsheet_Generic;
--
-- The spreadsheet uses a notion of logical key. Here is the mapping
-- of those logical keys to keypresses of 3 commonly used terminals.
-- Note also that except on the VT100, the numeric keypad can be used
-- for numbers entries (unlike the Environment editor usage).
--
-- [Logical key] Facit terminal VT100 Rational
-- -----------------------------------------------------------------
-- Help ** F5 [Help/Help] PF1 F11
-- Definition * F4 [Definition] pad 8 F10
-- Show * F9 [Other Part] pad 6 F17
-- Format X6 [Format] pad - Format
-- Compute * X4 [Promote] enter Promot
-- Save ** F6 [Install] pad 2 F13
-- Load * F10 [Semanticize] pad 3 F16
-- Time F12 [What Time] PF4 F20
-- Command * F8 [Create Comm.] pad . F15
-- Window X3 [Window] PF2 window
-- Print (future) F11 [Print] PF3 CM_F11
--
-- * indicates that function is application dependent
-- ** indicates that function is patially application dependent
--
-- Up, Down Up, Down <-idem <-idem
-- Left, Right Left,Right
--
-- Begin_Of [Back_Tab] pad 7 Begin_of
-- End_Of C_I [Tab] pad 9 End_Of
-- Home X5 [Complete] pad 5 complet
-- Bottom C_ Line_Feed C_ ????
--
-- Del Del Del
-- Erase C_D C_D C_D
--
-- Reset C_H [Backspace] pad 4 C_H
-- Quit Esc-Enter Esc-G Esc-Enter
-- Disconnect C_G C_G C_G
-- Reconnect esc-F11 ???? meta-F19
--
-------------------------------------------------------------------------------
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