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RE: [Gcl-devel] Is GCL-TK broken ?


From: Mike Thomas
Subject: RE: [Gcl-devel] Is GCL-TK broken ?
Date: Thu, 10 Jul 2003 10:28:46 +1000

Hi Vadim.

| I just tried a simple example from
| the very beginning of gcl-tk.info:
|
|  >(in-package "tk")
|  >(tkcoonect)
|
| It fails with message that si::open-named-socked
| must have less than two arguments.  Indeed,
| in /gcl-tk/tkl.lisp this function is invoked as
| (si::open-named-socket 0 nil) while in socket.c
| it is defined with 1 argument.
|
| Anyone tried gcl-tk?  Any success?
| It seems that at present TK package is broken.

You don't say what platform, but it is definitely broken on Windows and
unlikely to be fixed in a hurry.

The Windows binary of GCL comes with a basic binding to the JAPI java GUI
library.  An example of how to use it is included below.

If you build GCL from source on Linux you can probably easily get that
binding working there too - I haven't had feedback on it.  Just get libjapi
and japi.h from the JAPI web site.

Cheers

Mike Thomas.

;;;
;;; Japi is a cross-platform, easy to use (rough and ready) Java based GUI
library
;;; Download a library and headers for your platform, and get the C examples
;;; and documentation from:
;;;
;;;     http://www.japi.de/
;;;
;;; This file shows how to use some of the available functions.  You may
assume
;;; that the only functions tested so far in the binding are those which
appear
;;; below, as this file doubles as the test program.  The binding is so
simple
;;; however that so far no binding (APART FROM J_PRINT) has gone wrong of
those
;;; tested so far!
;;;
;;;
;;; HOW TO USE THIS FILE
;;;
;;; (compile-file "c:/cvs/gcl/japitest.lsp") (load "c:/cvs/gcl/japitest.o")
;;;
;;; Do not try and load the lisp directly - it will fail.
;;;
;;; Requires either "java" or "jre" in the path to work.
;;;

(in-package :japi-primitives)

;; Start up the Japi server (needs to find either "java" or "jre" in your
path
(defmacro with-server ((app-name debug-level) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(if (= 0 (j_start))
                            (format t (format nil "~S can't connect to the Japi 
GUI server."
,app-name))
                          (progn
                            (j_setdebug ,debug-level)
                            ,@ds
                            (unwind-protect
                                (progn ,@b)
                              (j_quit))))))

;; Use a frame and clean up afterwards even if trouble ensues
(defmacro with-frame ((frame-var-name title) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,frame-var-name (j_frame ,title)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,frame-var-name)))))

;; Use a canvas and clean up afterwards even if trouble ensues
(defmacro with-canvas ((canvas-var-name frame-obj x-size y-size) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,canvas-var-name (j_canvas ,frame-obj ,x-size 
,y-size)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,canvas-var-name)))))

;; Use a pulldown menu bar and clean up afterwards even if trouble ensues
(defmacro with-menu-bar ((bar-var-name frame-obj) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,bar-var-name (j_menubar ,frame-obj)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,bar-var-name)))))

;; Add a pulldown menu and clean up afterwards even if trouble ensues
(defmacro with-menu ((menu-var-name bar-obj title) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,menu-var-name (j_menu ,bar-obj ,title)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,menu-var-name)))))

;; Add a pulldown menu item and clean up afterwards even if trouble ensues
(defmacro with-menu-item ((item-var-name menu-obj title) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,item-var-name (j_menuitem ,menu-obj ,title)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,item-var-name)))))

;; Add a mouse listener and clean up afterwards even if trouble ensues
(defmacro with-mouse-listener ((var-name obj type) . body)
  (multiple-value-bind (ds b)
                       (si::find-declarations body)
                       `(let ((,var-name (j_mouselistener ,obj ,type)))
                          ,@ds
                          (unwind-protect
                              (progn ,@b)
                            (j_dispose ,var-name)))))

;; Run a five second frame in a Japi server
(with-server ("GCL Japi library test GUI 1" 0)
             (with-frame (frame "Five Second Blank Test Frame")
                         (j_show frame)
                         (j_sleep 5000)))

;; Get a pointer to an array of ints
(defCfun "static void* inta_ptr(object s)" 0
  " return(s->fixa.fixa_self);")
(defentry inta-ptr (object) (int "inta_ptr"))

;; Draw function
(defun drawgraphics (drawable xmin ymin xmax ymax)
  (let* ((fntsize 10)
         (tmpstrx (format nil "XMax = ~D" xmax))
         (tmpstry (format nil "YMax = ~D" ymax))
         (tmpstrwidx (j_getstringwidth drawable tmpstrx)))
    (j_setfontsize drawable fntsize)
    (j_setnamedcolor drawable J_RED)

    (j_drawline drawable xmin ymin        (- xmax 1)      (- ymax 1))
    (j_drawline drawable xmin (- ymax 1)  (- xmax 1)      ymin)
    (j_drawrect drawable xmin ymin        (- xmax xmin 1) (- ymax xmin 1))

    (j_setnamedcolor drawable J_BLACK)
    (j_drawline drawable xmin (- ymax 30) (- xmax 1)      (- ymax 30))
    (j_drawstring drawable (- (/ xmax 2) (/ tmpstrwidx 2)) (- ymax 40)
tmpstrx)

    (j_drawline drawable (+ xmin 30) ymin (+ xmin 30) (- ymax 1))
    (j_drawstring drawable (+ xmin 50) 40 tmpstry)

    (j_setnamedcolor drawable J_MAGENTA)
    (loop for i from 1 to 10
          do (j_drawoval drawable
                         (+ xmin (/ (- xmax xmin) 2))
                         (+ ymin (/ (- ymax ymin) 2))
                         (* (/ (- xmax xmin) 20) i)
                         (* (/ (- ymax ymin) 20) i)))

    (j_setnamedcolor drawable J_BLUE)
    (let ((y ymin)
          (teststr "JAPI Test Text"))
      (loop for i from 5 to 21 do
            (j_setfontsize drawable i)
            (let ((x (- xmax (j_getstringwidth drawable teststr))))
              (setf y (+ y (j_getfontheight drawable)))
              (j_drawstring drawable x y teststr))))))

;; Run some more extensive tests
(with-server
 ("GCL Japi library test GUI 2" 0)
 (with-frame
  (frame "Draw")
  (j_show frame)
  (let ((alert (j_messagebox frame "Two second alert box" "label")))
    (j_sleep 2000)
    (j_dispose alert))
  (let ((result1 (j_alertbox frame "label1" "label2" "OK"))
        (result2 (j_choicebox2 frame "label1" "label2" "Yes" "No"))
        (result3 (j_choicebox3 frame "label1" "label2" "Yes" "No" "Cancel")))
    (format t "Requestor results were: ~D, ~D, ~D~%" result1 result2
result3))
  (j_setborderlayout frame)
  (with-menu-bar
   (menubar frame)
   (with-menu
    (file menubar "File")
    (with-menu-item
     (print file "Print")
     (with-menu-item
      (save file "Save BMP")
      (with-menu-item
       (quit file "Quit")
       (with-canvas
        (canvas frame 400 600)
        (j_pack frame)
        (drawgraphics canvas 0 0 (j_getwidth canvas) (j_getheight canvas))
        (j_show frame)
        (do ((obj (j_nextaction) (j_nextaction)))
            ((or (= obj frame) (= obj quit)) t)
            (when (= obj canvas)
              (j_setnamedcolorbg canvas J_WHITE)
              (drawgraphics canvas 10 10
                            (- (j_getwidth canvas) 10)
                            (- (j_getheight canvas) 10)))
            (when (= obj print)
              (let ((printer (j_printer frame)))
                (when (> 0 printer)
                  (drawgraphics printer 40 40
                                (- (j_getwidth printer) 80)
                                (- (j_getheight printer) 80))
                  (j_print printer))))
            (when (= obj save)
              (let ((image (j_image 600 800)))
                (drawgraphics image 0 0 600 800)
                (when (= 0 (j_saveimage image "test.bmp" J_BMP))
                  (j_alertbox frame "Problems" "Can't save the image" 
"OK")))))))))))))
;; Try some mouse handling
(with-server
 ("GCL Japi library test GUI 3" 0)
 (with-frame
  (frame "Move and drag the mouse")
  (j_setsize frame 430 240)
  (j_setnamedcolorbg frame J_LIGHT_GRAY)
  (with-canvas
   (canvas1 frame 200 200)
   (with-canvas
    (canvas2 frame 200 200)
    (j_setpos canvas1 10 30)
    (j_setpos canvas2 220 30)
    (with-mouse-listener
     (pressed canvas1 J_PRESSED)
     (with-mouse-listener
      (dragged canvas1 J_DRAGGED)
      (with-mouse-listener
       (released canvas1 J_RELEASED)
       (with-mouse-listener
        (entered canvas2 J_ENTERERD)
        (with-mouse-listener
         (moved canvas2 J_MOVED)
         (with-mouse-listener
          (exited canvas2 J_EXITED)
          (j_show frame)
          ;; Allocate immovable storage for passing data back from C land.
          ;; Uses the GCL only make-array keyword :static
          (let* ((xa (make-array 1 :initial-element 0 :element-type 'fixnum 
:static
t))
                 (ya (make-array 1 :initial-element 0 :element-type 'fixnum 
:static t))
                 (pxa (inta-ptr xa))
                 (pya (inta-ptr ya))
                 (x 0)
                 (y 0)
                 (get-mouse-xy (lambda (obj)
                                 (progn (j_getmousepos obj pxa pya)
                                        (setf x (aref xa 0))
                                        (setf y (aref ya 0)))))
                 (startx 0)
                 (starty 0))
            (do ((obj (j_nextaction) (j_nextaction)))
                ((= obj frame) t)
                (when (= obj pressed)
                  (funcall get-mouse-xy pressed)
                  (setf startx x)
                  (setf starty y))
                (when (= obj dragged)
                  (funcall get-mouse-xy dragged)
                  (j_drawrect canvas1 startx starty (- x startx) (- y starty)))
                (when (= obj released)
                  (funcall get-mouse-xy released)
                  (j_drawrect canvas1 startx starty (- x startx) (- y starty)))
                (when (= obj entered)
                  (funcall get-mouse-xy entered)
                  (setf startx x)
                  (setf starty y))
                (when (= obj moved)
                  (funcall get-mouse-xy moved)
                  (j_drawline canvas2 startx starty x y))
                (setf startx x)
                (setf starty y)
                (when (= obj exited)
                  (funcall get-mouse-xy exited)
                  (j_drawline canvas2 startx starty x y))))))))))))))






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