gpreact.lsp

Autocad-2005-简体中文-解密版.zip

;;;                                                                    ;
;;;  GPREACT.LSP                                                       ;
;;;                                                                    ;
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;;;                                                                    ;
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;;;                                                                    ;

;;;--------------------------------------------------------------------;
;;;  This file is from the Garden Path tutorial, and represents the    ;
;;;  state of the application at the end of Lesson 6.  Use this file   ;
;;;  to check your work, or to start off Lesson 7 with the code as it  ;
;;;  appears in the tutorial.                                          ;
;;;--------------------------------------------------------------------;


;;;--------------------------------------------------------------------;
;;;  General Notes:                                                    ;
;;;--------------------------------------------------------------------;
;;;  After the execution of these reactor functions, you might         ;
;;;  experience difficulty in returning to Visual Lisp.  If this does  ;
;;;  happen, type VLide at the AutoCAD command prompt and focus will   ;
;;;  be returned to Visual Lisp.                                       ;
;;;--------------------------------------------------------------------;
;;;  There are three types of reactors which we will be using:         ;
;;;          1. an object reactor                                      ;
;;;          2. a command reactor                                      ;
;;;          3. a drawing reactor                                      ;
;;;  We will define two functions that will notify us when the user    ;
;;;  has modified or changed the garden path.                          ;
;;;--------------------------------------------------------------------;
;;; Object Reactor                                                     ;
;;;----------------------|---------------------|-----------------------;
;;; Event                |Function to call     | Description           ;
;;;----------------------|---------------------|-----------------------;
;;; :vlr-modified        |gp:outline-changed   | Function called       ;
;;;                      |                     | when object declared  ;
;;;                      |                     | in owners is modified ;
;;;----------------------|---------------------|-----------------------;
;;; :vlr-erased	         |gp:outline-erased    | Function called       ;
;;;                      |                     | when object is erased ;
;;;----------------------|---------------------|-----------------------;
;;;                                                                    ;
;;; Command Reactor                                                    ;
;;;----------------------|---------------------|-----------------------;
;;; Event                |Function to call     | Description           ;
;;;----------------------|---------------------|-----------------------;
;;; :vlr-commandWillStart|gp:command-will-start| Function called when  ;
;;;                      |                     | a command is typed    ;
;;;                      |                     | at the command prompt ;
;;;----------------------|---------------------|-----------------------;
;;; :vlr-commandEnded	 |gp:command-ended     | Function called when  ;
;;;                      |                     | a command has ended   ;
;;;----------------------|---------------------|-----------------------;
;;;                                                                    ;
;;; Drawing Reactor                                                    ;
;;;----------------------|---------------------|-----------------------;
;;; Event                |Function to call     | Description           ;
;;;----------------------|---------------------|-----------------------;
;;; :vlr-beginClose      |gp:clean-all-reactors| Function to clean all ;
;;;                      |                     | existing reactors     ;
;;;                      |                     | before ACAD exits     ;
;;;--------------------------------------------------------------------;
;;; Since reactor events occur in sequence (commandWillStart occuring  ;
;;; before the object modified reactor, for example), we need a few    ;
;;; global variables to keep track of what changes are occuring to the ;
;;; path.  The following globals are used:                             ;
;;;          *polyToChange*                                            ;
;;;          *reactorsToRemove*                                        ;
;;;--------------------------------------------------------------------;


;;;--------------------------------------------------------------------;
;;;     Function: gp:command-will-start                                ;
;;;--------------------------------------------------------------------;
;;;  Description: This is a reactor to any command starting            ;
;;;--------------------------------------------------------------------;
;;;  This is the function where we figure out what *will* be happening ;
;;;  to the garden path (not what *is* happening).  Reset the global   ;
;;;  variables *polyToChange* and *reactorsToRemove* so that           ;
;;;  subsequent reactor events will perform the correct actions.       ;
;;;  (This is necessary since this function may be called more than    ;
;;;  once, and the *polyToChange* pointer could be pointing to a       ;
;;;  polyline other than the one the user just selected for editing!)  ;
;;;  Also, reset the *reactorsToRemove* global, for the same reason.   ;
;;;--------------------------------------------------------------------;
;;;  THIS FUNCTION IS CURRENTLY IN A STUBBED-OUT STATE!!!              ;
;;;--------------------------------------------------------------------;
(defun gp:command-will-start (reactor command-list)
  ;; Reset the global variable
  (setq	*polyToChange*  nil
	*reactorsToRemove* nil
  ) ;_ end of setq

  ;; Print to the console to see the results of the incoming data
  (terpri)
  (princ (list 'gp:command-will-start reactor command-list))
  (terpri)
  (princ (setq reactorData (vlr-data reactor)))
  (alert
    (strcat
      (format-reactor-message 'gp:command-will-start)
      "\n\tThis reactor-callback function's responsibility will be to:\n"
      "\n\tReset any of the global variables used within reactor functions"
      "\n\tto an initial nil state.  It will also note what AutoCAD command"
      "\n\thas been issued and respond accordingly.\n"
      "\n\tAssociated Actions:"
      "\n\tIf a U, UNDO, STRETCH, MOVE, ROTATE, or SCALE command is being"
      "\n\tstarted, break the associativity between the tiles and the "
      "\n\tpolyline boundary."
    ) ;_ end of strcat
  ) ;_ end of alert
  (princ)
) ;_ end of defun


;;;--------------------------------------------------------------------;
;;;     Function: gp:outline-erased                                    ;
;;;--------------------------------------------------------------------;
;;;  Description: This reactor function is triggered when the path     ;
;;;               outline is being erased.  If this happens, we need to;
;;;                    1) Erase all of the tiles (the user is taking   ;
;;;                       care of the rest of the work)                ;
;;;                    2) Set a global variable that stores the        ;
;;;                       reactor assigned to this polyline, so that   ;
;;;                       it can be removed when command-ended fires   ;
;;;--------------------------------------------------------------------;
;;;  THIS FUNCTION IS CURRENTLY IN A STUBBED-OUT STATE!!!              ;
;;;--------------------------------------------------------------------;
(defun gp:outline-erased (outlinePoly reactor parameterList)