--- /dev/null
+------------------------------------------------------------------------------
+-- --
+-- GNAT ncurses Binding Samples --
+-- --
+-- ncurses --
+-- --
+-- B O D Y --
+-- --
+------------------------------------------------------------------------------
+-- Copyright (c) 2000 Free Software Foundation, Inc. --
+-- --
+-- Permission is hereby granted, free of charge, to any person obtaining a --
+-- copy of this software and associated documentation files (the --
+-- "Software"), to deal in the Software without restriction, including --
+-- without limitation the rights to use, copy, modify, merge, publish, --
+-- distribute, distribute with modifications, sublicense, and/or sell --
+-- copies of the Software, and to permit persons to whom the Software is --
+-- furnished to do so, subject to the following conditions: --
+-- --
+-- The above copyright notice and this permission notice shall be included --
+-- in all copies or substantial portions of the Software. --
+-- --
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
+-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
+-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
+-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
+-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
+-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
+-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
+-- --
+-- Except as contained in this notice, the name(s) of the above copyright --
+-- holders shall not be used in advertising or otherwise to promote the --
+-- sale, use or other dealings in this Software without prior written --
+-- authorization. --
+------------------------------------------------------------------------------
+-- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
+-- Version Control
+-- $Revision: 1.1 $
+-- Binding Version 01.00
+------------------------------------------------------------------------------
+with ncurses2.util; use ncurses2.util;
+with Terminal_Interface.Curses; use Terminal_Interface.Curses;
+with Terminal_Interface.Curses.Forms; use Terminal_Interface.Curses.Forms;
+with Terminal_Interface.Curses.Forms.Field_User_Data;
+with Ada.Characters.Handling;
+with Ada.Strings;
+with Ada.Strings.Bounded;
+
+procedure ncurses2.demo_forms is
+ package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (80);
+
+ type myptr is access Integer;
+
+ -- The C version stores a pointer in the userptr and
+ -- converts it into a long integer.
+ -- The correct, but inconvenient way to do it is to use a
+ -- pointer to long and keep the pointer constant.
+ -- It just adds one memory piece to allocate and deallocate (not done here)
+
+ package StringData is new
+ Terminal_Interface.Curses.Forms.Field_User_Data (Integer, myptr);
+
+ function edit_secure (me : Field; c_in : Key_Code) return Key_Code;
+ function form_virtualize (f : Form; w : Window) return Key_Code;
+ function my_form_driver (f : Form; c : Key_Code) return Boolean;
+ function make_label (frow : Line_Position;
+ fcol : Column_Position;
+ label : String) return Field;
+ function make_field (frow : Line_Position;
+ fcol : Column_Position;
+ rows : Line_Count;
+ cols : Column_Count;
+ secure : Boolean) return Field;
+ procedure display_form (f : Form);
+ procedure erase_form (f : Form);
+
+ -- prints '*' instead of characters.
+ -- Not that this keeps a bug from the C version:
+ -- type in the psasword field then move off and back.
+ -- the cursor is at position one, but
+ -- this assumes it as at the end so text gets appended instead
+ -- of overwtitting.
+ function edit_secure (me : Field; c_in : Key_Code) return Key_Code is
+ rows, frow : Line_Position;
+ nrow : Natural;
+ cols, fcol : Column_Position;
+ nbuf : Buffer_Number;
+ c : Key_Code := c_in;
+ c2 : Character;
+
+ use StringData;
+ begin
+ Info (me, rows, cols, frow, fcol, nrow, nbuf);
+ -- TODO if result = Form_Ok and nbuf > 0 then
+ -- C version checked the return value
+ -- of Info, the Ada binding throws an exception I think.
+ if nbuf > 0 then
+ declare
+ temp : BS.Bounded_String;
+ temps : String (1 .. 10);
+ -- TODO Get_Buffer povides no information on the field length?
+ len : myptr;
+ begin
+ Get_Buffer (me, 1, Str => temps);
+ -- strcpy(temp, field_buffer(me, 1));
+ Get_User_Data (me, len);
+ temp := BS.To_Bounded_String (temps (1 .. len.all));
+ if c <= Key_Max then
+ c2 := Code_To_Char (c);
+ if Ada.Characters.Handling.Is_Graphic (c2) then
+ BS.Append (temp, c2);
+ len.all := len.all + 1;
+ Set_Buffer (me, 1, BS.To_String (temp));
+ c := Character'Pos ('*');
+ else
+ c := 0;
+ end if;
+ else
+ case c is
+ when REQ_BEG_FIELD |
+ REQ_CLR_EOF |
+ REQ_CLR_EOL |
+ REQ_DEL_LINE |
+ REQ_DEL_WORD |
+ REQ_DOWN_CHAR |
+ REQ_END_FIELD |
+ REQ_INS_CHAR |
+ REQ_INS_LINE |
+ REQ_LEFT_CHAR |
+ REQ_NEW_LINE |
+ REQ_NEXT_WORD |
+ REQ_PREV_WORD |
+ REQ_RIGHT_CHAR |
+ REQ_UP_CHAR =>
+ c := 0; -- we don't want to do inline editing
+ when REQ_CLR_FIELD =>
+ if len.all /= 0 then
+ temp := BS.To_Bounded_String ("");
+ Set_Buffer (me, 1, BS.To_String (temp));
+ len.all := 0;
+ end if;
+
+ when REQ_DEL_CHAR |
+ REQ_DEL_PREV =>
+ if len.all /= 0 then
+ BS.Delete (temp, BS.Length (temp), BS.Length (temp));
+ Set_Buffer (me, 1, BS.To_String (temp));
+ len.all := len.all - 1;
+ end if;
+ when others => null;
+ end case;
+ end if;
+ end;
+ end if;
+ return c;
+ end edit_secure;
+
+ mode : Key_Code := REQ_INS_MODE;
+
+ function form_virtualize (f : Form; w : Window) return Key_Code is
+ type lookup_t is record
+ code : Key_Code;
+ result : Key_Code;
+ -- should be Form_Request_Code, but we need MAX_COMMAND + 1
+ end record;
+
+ lookup : constant array (Positive range <>) of lookup_t :=
+ (
+ (
+ Character'Pos ('A') mod 16#20#, REQ_NEXT_CHOICE
+ ),
+ (
+ Character'Pos ('B') mod 16#20#, REQ_PREV_WORD
+ ),
+ (
+ Character'Pos ('C') mod 16#20#, REQ_CLR_EOL
+ ),
+ (
+ Character'Pos ('D') mod 16#20#, REQ_DOWN_FIELD
+ ),
+ (
+ Character'Pos ('E') mod 16#20#, REQ_END_FIELD
+ ),
+ (
+ Character'Pos ('F') mod 16#20#, REQ_NEXT_PAGE
+ ),
+ (
+ Character'Pos ('G') mod 16#20#, REQ_DEL_WORD
+ ),
+ (
+ Character'Pos ('H') mod 16#20#, REQ_DEL_PREV
+ ),
+ (
+ Character'Pos ('I') mod 16#20#, REQ_INS_CHAR
+ ),
+ (
+ Character'Pos ('K') mod 16#20#, REQ_CLR_EOF
+ ),
+ (
+ Character'Pos ('L') mod 16#20#, REQ_LEFT_FIELD
+ ),
+ (
+ Character'Pos ('M') mod 16#20#, REQ_NEW_LINE
+ ),
+ (
+ Character'Pos ('N') mod 16#20#, REQ_NEXT_FIELD
+ ),
+ (
+ Character'Pos ('O') mod 16#20#, REQ_INS_LINE
+ ),
+ (
+ Character'Pos ('P') mod 16#20#, REQ_PREV_FIELD
+ ),
+ (
+ Character'Pos ('R') mod 16#20#, REQ_RIGHT_FIELD
+ ),
+ (
+ Character'Pos ('S') mod 16#20#, REQ_BEG_FIELD
+ ),
+ (
+ Character'Pos ('U') mod 16#20#, REQ_UP_FIELD
+ ),
+ (
+ Character'Pos ('V') mod 16#20#, REQ_DEL_CHAR
+ ),
+ (
+ Character'Pos ('W') mod 16#20#, REQ_NEXT_WORD
+ ),
+ (
+ Character'Pos ('X') mod 16#20#, REQ_CLR_FIELD
+ ),
+ (
+ Character'Pos ('Y') mod 16#20#, REQ_DEL_LINE
+ ),
+ (
+ Character'Pos ('Z') mod 16#20#, REQ_PREV_CHOICE
+ ),
+ (
+ Character'Pos ('[') mod 16#20#, -- ESCAPE
+ Form_Request_Code'Last + 1
+ ),
+ (
+ Key_Backspace, REQ_DEL_PREV
+ ),
+ (
+ KEY_DOWN, REQ_DOWN_CHAR
+ ),
+ (
+ Key_End, REQ_LAST_FIELD
+ ),
+ (
+ Key_Home, REQ_FIRST_FIELD
+ ),
+ (
+ KEY_LEFT, REQ_LEFT_CHAR
+ ),
+ (
+ KEY_LL, REQ_LAST_FIELD
+ ),
+ (
+ Key_Next, REQ_NEXT_FIELD
+ ),
+ (
+ KEY_NPAGE, REQ_NEXT_PAGE
+ ),
+ (
+ KEY_PPAGE, REQ_PREV_PAGE
+ ),
+ (
+ Key_Previous, REQ_PREV_FIELD
+ ),
+ (
+ KEY_RIGHT, REQ_RIGHT_CHAR
+ ),
+ (
+ KEY_UP, REQ_UP_CHAR
+ ),
+ (
+ Character'Pos ('Q') mod 16#20#, -- QUIT
+ Form_Request_Code'Last + 1 -- TODO MAX_FORM_COMMAND + 1
+ )
+ );
+
+ c : Key_Code := Getchar (w);
+ me : Field := Current (f);
+
+ begin
+ if c = Character'Pos (']') mod 16#20# then
+ if mode = REQ_INS_MODE then
+ mode := REQ_OVL_MODE;
+ else
+ mode := REQ_INS_MODE;
+ end if;
+ c := mode;
+ else
+ for n in lookup'Range loop
+ if lookup (n).code = c then
+ c := lookup (n).result;
+ exit;
+ end if;
+ end loop;
+ end if;
+
+ -- Force the field that the user is typing into to be in reverse video,
+ -- while the other fields are shown underlined.
+ if c <= Key_Max then
+ c := edit_secure (me, c);
+ Set_Background (me, (Reverse_Video => True, others => False));
+ elsif c <= Form_Request_Code'Last then
+ c := edit_secure (me, c);
+ Set_Background (me, (Under_Line => True, others => False));
+ end if;
+ return c;
+ end form_virtualize;
+
+ function my_form_driver (f : Form; c : Key_Code) return Boolean is
+ flag : Driver_Result := Driver (f, F_Validate_Field);
+ begin
+ if c = Form_Request_Code'Last + 1
+ and flag = Form_Ok then
+ return True;
+ else
+ Beep;
+ return False;
+ end if;
+ end my_form_driver;
+
+ function make_label (frow : Line_Position;
+ fcol : Column_Position;
+ label : String) return Field is
+ f : Field := Create (1, label'Length, frow, fcol, 0, 0);
+ o : Field_Option_Set := Get_Options (f);
+ begin
+ if f /= Null_Field then
+ Set_Buffer (f, 0, label);
+ o.Active := False;
+ Set_Options (f, o);
+ end if;
+ return f;
+ end make_label;
+
+ function make_field (frow : Line_Position;
+ fcol : Column_Position;
+ rows : Line_Count;
+ cols : Column_Count;
+ secure : Boolean) return Field is
+ f : Field;
+ use StringData;
+ len : myptr;
+ begin
+ if secure then
+ f := Create (rows, cols, frow, fcol, 0, 1);
+ else
+ f := Create (rows, cols, frow, fcol, 0, 0);
+ end if;
+
+ if f /= Null_Field then
+ Set_Background (f, (Under_Line => True, others => False));
+ len := new Integer;
+ len.all := 0;
+ Set_User_Data (f, len);
+ end if;
+ return f;
+ end make_field;
+
+ procedure display_form (f : Form) is
+ w : Window;
+ rows : Line_Count;
+ cols : Column_Count;
+ begin
+ Scale (f, rows, cols);
+
+ w := New_Window (rows + 2, cols + 4, 0, 0);
+ if w /= Null_Window then
+ Set_Window (f, w);
+ Set_Sub_Window (f, Derived_Window (w, rows, cols, 1, 2));
+ Box (w); -- 0,0
+ Set_KeyPad_Mode (w, True);
+ end if;
+
+ -- TODO if Post(f) /= Form_Ok then it's a procedure
+ declare
+ begin
+ Post (f);
+ exception
+ when
+ Eti_System_Error |
+ Eti_Bad_Argument |
+ Eti_Posted |
+ Eti_Connected |
+ Eti_Bad_State |
+ Eti_No_Room |
+ Eti_Not_Posted |
+ Eti_Unknown_Command |
+ Eti_No_Match |
+ Eti_Not_Selectable |
+ Eti_Not_Connected |
+ Eti_Request_Denied |
+ Eti_Invalid_Field |
+ Eti_Current =>
+ Refresh (w);
+ end;
+ -- end if;
+ end display_form;
+
+ procedure erase_form (f : Form) is
+ w : Window := Get_Window (f);
+ s : Window := Get_Sub_Window (f);
+ begin
+ Post (f, False);
+ Erase (w);
+ Refresh (w);
+ Delete (s);
+ Delete (w);
+ end erase_form;
+
+ finished : Boolean := False;
+ f : Field_Array_Access := new Field_Array (1 .. 12);
+ secure : Field;
+ myform : Form;
+ w : Window;
+ c : Key_Code;
+ result : Driver_Result;
+begin
+ Move_Cursor (Line => 18, Column => 0);
+ Add (Str => "Defined form-traversal keys: ^Q/ESC- exit form");
+ Add (Ch => newl);
+ Add (Str => "^N -- go to next field ^P -- go to previous field");
+ Add (Ch => newl);
+ Add (Str => "Home -- go to first field End -- go to last field");
+ Add (Ch => newl);
+ Add (Str => "^L -- go to field to left ^R -- go to field to right");
+ Add (Ch => newl);
+ Add (Str => "^U -- move upward to field ^D -- move downward to field");
+ Add (Ch => newl);
+ Add (Str => "^W -- go to next word ^B -- go to previous word");
+ Add (Ch => newl);
+ Add (Str => "^S -- go to start of field ^E -- go to end of field");
+ Add (Ch => newl);
+ Add (Str => "^H -- delete previous char ^Y -- delete line");
+ Add (Ch => newl);
+ Add (Str => "^G -- delete current word ^C -- clear to end of line");
+ Add (Ch => newl);
+ Add (Str => "^K -- clear to end of field ^X -- clear field");
+ Add (Ch => newl);
+ Add (Str => "Arrow keys move within a field as you would expect.");
+
+ Add (Line => 4, Column => 57, Str => "Forms Entry Test");
+
+ Refresh;
+
+ -- describe the form
+ f (1) := make_label (0, 15, "Sample Form");
+ f (2) := make_label (2, 0, "Last Name");
+ f (3) := make_field (3, 0, 1, 18, False);
+ f (4) := make_label (2, 20, "First Name");
+ f (5) := make_field (3, 20, 1, 12, False);
+ f (6) := make_label (2, 34, "Middle Name");
+ f (7) := make_field (3, 34, 1, 12, False);
+ f (8) := make_label (5, 0, "Comments");
+ f (9) := make_field (6, 0, 4, 46, False);
+ f (10) := make_label (5, 20, "Password:");
+ f (11) := make_field (5, 30, 1, 9, True);
+ secure := f (11);
+ f (12) := Null_Field;
+
+ myform := New_Form (f);
+
+ display_form (myform);
+
+ w := Get_Window (myform);
+ Set_Raw_Mode (SwitchOn => True);
+ Set_NL_Mode (SwitchOn => True); -- lets us read ^M's
+ while not finished loop
+ c := form_virtualize (myform, w);
+ result := Driver (myform, c);
+ case result is
+ when Form_Ok =>
+ Add (Line => 5, Column => 57, Str => Get_Buffer (secure, 1));
+ Clear_To_End_Of_Line;
+ Refresh;
+ when Unknown_Request =>
+ finished := my_form_driver (myform, c);
+ when others =>
+ Beep;
+ end case;
+ end loop;
+
+ erase_form (myform);
+
+ -- TODO Free_Form(myform);
+ -- for (c = 0; f[c] != 0; c++) free_field(f[c]);
+ Set_Raw_Mode (SwitchOn => False);
+ Set_NL_Mode (SwitchOn => True);
+
+end ncurses2.demo_forms;
projects / ncurses.git / blobdiff