Common lisp 错误:can';t读取服务器:远程使用ltk时没有此类变量
我正在修补它,因为它提供了运行远程GUI的选项。但是,在尝试使用远程GUI时,我遇到了在本地运行ltk时没有遇到的问题:Common lisp 错误:can';t读取服务器:远程使用ltk时没有此类变量,common-lisp,ltk,Common Lisp,Ltk,我正在修补它,因为它提供了运行远程GUI的选项。但是,在尝试使用远程GUI时,我遇到了在本地运行ltk时没有遇到的问题: (in-package :ltk-user) (defun add-current-investigation-frame (master) (let* ((frame (make-instance 'frame :master master :width 100 :height 100)) (topic-label (make-instance '
(in-package :ltk-user)
(defun add-current-investigation-frame (master)
(let* ((frame (make-instance 'frame :master master :width 100 :height 100))
(topic-label (make-instance 'label :text "Current Investigation" :master frame))
(project-label (make-instance 'entry :text "N/A" :master frame))
(action-button (make-instance 'button
:master frame
:text "new investigation")))
(setf (command action-button) (lambda ()
(format t "test~%")
(let ((next-project (nth (random 3) '("A" "B" "N/A"))))
(setf (text project-label) next-project))))
(pack frame)
(pack topic-label :side :top)
(pack project-label :side :top)
(pack action-button :side :top)))
(defun create-main-view ()
(let ((wrapper-frame (make-instance 'frame :master nil)))
(pack wrapper-frame)
(add-current-investigation-frame wrapper-frame)))
(defun create-remote-view (&optional (port 8888))
(Ltk:with-remote-ltk port ()
(create-main-view)))
(defun create-local-view ()
(with-ltk ()
(create-main-view)))
运行(创建本地视图)
时,一切正常,条目小部件的内容随机更改
当运行(创建远程视图)
时,我收到错误消息无法读取服务器:没有这样的变量
为什么会发生此错误以及如何修复此错误?
我正在使用quicklisp部署的remote.tcl
:
#!/usr/bin/wish
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
wm withdraw .
set host localhost
if {[llength $argv] == 2} {
set host [lindex $argv 0]
set port [lindex $argv 1]} else {
set port [lindex $argv 0]}
#puts "connecting to $host $port"
set server [socket $host $port]
set wi [open "|wish" RDWR]
fconfigure $server -blocking 0
fconfigure $wi -blocking 0
fileevent $server readable {set txt [read $server];puts $wi "$txt";flush $wi}
fileevent $wi readable {
if {[eof $wi]} {
close $wi
exit} else {
set txt [read $wi]; puts -nonewline $server $txt;flush $server}}
这是一个初步的答案,因为我不完全确定这个修复不会破坏任何东西。我将在将来更新此答案,以报告遇到的问题。但就目前而言,这解决了问题 在
ltk.lisp
中有一个名为init wish
的函数,它需要一个额外的行(send wish“set server stdout”)
说明:该功能似乎设置了wish界面和操作(通过在remote.tcl
中插入打印来确认)。但是,正如我们可以看到的,在所有的进程中都引用了<代码>服务器>代码>,但是如果我们认为所有这些声明都在自己的命名空间中,则永远不会声明。因此,必须定义丢失的服务器。由于所有输出都由fileevent$wi读取…
然后进一步传递,因此将server
定义为stdout
似乎是最明智的选择
它似乎可以工作,但是我不知道这是否会破坏其他东西所以我花了一些时间阅读和测试代码,似乎它与
远程客户端.tcl
比远程.tcl
工作得更好。使用ltk remote.lisp
时,lisp端创建一个服务器,可以接受多个客户机,每个客户机都是tcl/tk解释器
lisp <=== socket stream ===> [ server socket ]
^
|
(wish interpreter)
它还连接到服务器(变量server
),并将输入从服务器复制到流程。不幸的是,嵌入式wish流程没有定义服务器变量:
lisp <=== socket stream ===> [ server socket ]
^
|
(wish interpreter 1)
"server" variable
|
"wi" variable
^
| pipe connection
v
(wish interpreter 2)
no "server" variable
正如您可能已经忘记的:您是否意识到任何由此产生的破损?这有可能是相关的吗?谢谢。@Kotlopou不,在我应用修复程序后,对我来说工作得很好,没有任何进一步的问题。你说的“使用remote client.tcl
比remote.tcl
更好”是什么意思?运行remote client.tcl
仅将事件打印到终端(stdout?),它不允许您与GUI交互。我使用例如(ltk remote::lrtest 5000)启动服务器,然后在另一个终端中执行“wish remote-client.tcl localhost 5000”,回调似乎正在工作(单击“退出”退出应用程序,等等)。明天我会再看一次,以确保我没有错过什么
set wi [open "|wish" RDWR]
lisp <=== socket stream ===> [ server socket ]
^
|
(wish interpreter 1)
"server" variable
|
"wi" variable
^
| pipe connection
v
(wish interpreter 2)
no "server" variable
package require Tk
set host localhost
set port 19790
set server ""
if {[llength $argv] > 0} {
set host [lindex $argv 0]
}
if {[llength $argv] > 1} {
set port [lindex $argv 1]
}
if {[catch {global server; global host; global port; set server [socket $host $port]}]} {
tk_messageBox -icon error -type ok -title "Connection failed!" -message "Cannot connect to server $host port $port."
exit
}
fconfigure $server -blocking 0 -translation binary -encoding utf-8
fileevent $server readable [list sread $server]
set buffer ""
proc getcount {s} {
if {[regexp {^\s*(\d+) } $s match num]} {
return $num
}
}
proc getstring {s} {
if {[regexp {^\s*(\d+) } $s match]} {
return [string range $s [string length $match] end]
}
}
proc process_buffer {} {
global buffer
global server
set count [getcount $buffer]
set tmp_buf [getstring $buffer]
while {($count > 0) && ([string length $tmp_buf] >= $count)} {
set cmd [string range $tmp_buf 0 $count]
set buffer [string range $tmp_buf [expr $count+1] end]
if {[catch $cmd result]>0} {
tk_messageBox -icon error -type ok -title "Error!" -message $result
puts $server "(error: \"$result\")"
flush $server
close $server
exit
}
set count [getcount $buffer]
set tmp_buf [getstring $buffer]
}
}
proc sread {server} {
global buffer
if {[eof $server]} {
tk_messageBox -icon info -type ok -title "Connection closed" -message "The connection has been closed by the server."
close $server
exit
} else {
set txt [read $server];
set buffer "$buffer$txt"
process_buffer
}
}