ncurses2-demo_forms.adb

ncurses-5.4 需要的就来下把 一定会有用的哦

          ),
         (
          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;