Entering Edit Boxes

Dialog boxes have many different kinds of visual means of showing and/or editing information. These are called tiles. Tiles, in effect, have attributes (properties). The tile attributes define the way tiles might react or may be shown by default. Some attributes can be defined in the driving source code (AutoLisp) and others in the dialog source code (DCL).

Attributes can also define the size or shape of tiles. The attribute that we will discuss to allow the enter key to act as the "OK" button is the allow_accept attribute. This particular tile attribute is always defined in the DCL file.
The DCL Coding shown below is the typical syntax for an edit box :

: edit_box {
                label = "some_label";
                allow_accept = true_or_false;
                width = tile_width;
                edit_width = length_of_edit_box;
                edit_limit = edit_limit_of_edit_box;
                key = "key_name_for_driving_source_access";
                mnemonic = "alt_key_for_easy_jump";
        }

Everything in between the braces { } is the edit box attributes. The allow_accept attribute shown above shows true_or_false. To set an edit box to allow the enter key to act as the "OK" button set the allow_accept attribute to be equal to true. If the attribute does not exist it may be added to the DCL file.

Note: Omitting the allow_accept attribute in dialog control syntax will leave the tile at allow_accept = false by default.

TRAJ2 : dialog {
        label = "Conveyor Trajectory";
      : edit_box {
        label = "&Velocity (m/s)";
        key = "VEL";
        edit_width = 5;
        allow_accept = true;
      }
      : edit_box {
        label = "&Radius of Pulley (m)";
        key = "RA";
        edit_width = 5;
        allow_accept = true;
      }
      : edit_box {
        label = "&Angle of Incline";
        key = "INC";
        edit_width = 5;
        allow_accept = true;
      }
      : edit_box {
        label = "&Depth of Material (mm)";
        key = "DEP";
        edit_width = 5;
        allow_accept = true;
       }
     ok_cancel ;
     :text_part {
         label = "Designed and Created";
      }
     :text_part {
         label = "by Kenny Ramage";
      }
     }

;CODING BEGINS HERE

(defun C:TRAJ2 ()

  (setq	V 1.5
	R 0.3
	ang 8.0
	MD 75.0
  );setq
  (setq dcl_id (load_dialog "TRAJ2.dcl"))
  (if (not (new_dialog "TRAJ2" dcl_id))
    (exit)
  );if
  (set_tile "VEL" "1.5")
  (set_tile "RA" "0.3")
  (set_tile "INC" "8.0")
  (set_tile "DEP" "75.0")
  (mode_tile "VEL" 2)
  (action_tile
    "cancel"
    "(done_dialog) (setq userclick nil)"
  )
  (action_tile
    "accept"
    (strcat
      "(progn (setq V (get_tile \"VEL\"))"
      "(setq R (get_tile \"RA\"))"
      "(setq ang (get_tile \"INC\"))"
      "(setq MD (get_tile \"DEP\"))"
      " (done_dialog)(setq userclick T))"
    )
  )
  (start_dialog)
  (unload_dialog dcl_id)
  (if userclick

  (alert (strcat "Velcocity = " V "\n"
                  "Radius = " R "\n"
                  "Angle = " ang "\n"
                  "Material Depth = " MD))
    
  );if
  
  (princ)

);defun

(princ)
;CODING ENDS HERE

Save this as TRAJ2.LSP. Now load and run it. A dialog like this should appear :

Change any of the values in the edit boxes. Now, whilst still in the edit box, press your "Enter" key. The dialog closes and the rest of the program runs.
When you press the "Enter" key, because the edit box tiles attribute "allow_accept" is set to "true", the coding for the tile which has the attribute "is_default" (the "OK" tile) is triggered.