Re: [racket-users] Rackterm error
On Sep 7, 2017, at 1:53 AM, William G Hatch wrote:
> On Tue, Sep 05, 2017 at 05:07:41PM -0400, James wrote:
>> I'm trying out Rackterm for the purpose of running commands put together
>> from a GUI but it looks like the thread is crashing as soon as I try to
>> create a terminal canvas. Is it something I am not doing right or is there
>> a bug? I am able to run rackterm/xterm without error and that contains very
>> similar code.
>
>
>>
>> Here's my code:
>>
>> #lang racket
>>
>> (require racket/gui
>>rackterm/private/terminal-canvas
>>)
>>
>> (define frame (new frame% [label "Example"]
>> (width 800)
>> (height 800)
>> ))
>>
>> (send frame show #t)
>>
>> (define my-term (new terminal-canvas%
>> [parent frame]
>> [font-size 14]
>> [font-name "Courier"]
>> [term-var "rackterm"]
>> [command-and-args '("ls -lh")]
>> [set-title-callback (lambda (title) (send frame set-label
>> title))]
>> [horiz-margin 2]
>> [vert-margin 2]
>>))
>>
>>
>> The terminal window appears and then immediately closes with the following
>> error message:
>>
>> "The evaluation thread is no longer running, so no evaluation can take place
>> until the next execution.
>>
>> Exited successfully."
>>
>
> Well, this is caused by my not having actually cleaned up the code for it to
> be used in any sort of general way, rather than specifically only by my one
> xterm (hence terminal canvas is still in the private directory). But there
> is a `handle-subproc-ended` method that I put a TODO in to make it
> configurable, but currently just kills the canvas, because usually you want
> an xterm to close when the shell inside it exits. But you could make a
> subclass that overrides that method, or even better, improve my bad code and
> send a pull request. Or eventually I'll fix things up and release them
> properly.
>
> Also '("ls -lh") should be '("ls" "-lh").
Thanks. I got it to work by creating a subclass. Unfortunately, it will take
more work to make it more useful than MrLib Terminal since what I really want
is something which will support running commands interactively created by GUI
elements. At this point, I can only run one command and then create a new
terminal object in order to run an additional command. I will probably get
back to this later.
James
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Re: [racket-users] Rackterm error
On Tue, Sep 05, 2017 at 05:07:41PM -0400, James wrote:
I'm trying out Rackterm for the purpose of running commands put together from a
GUI but it looks like the thread is crashing as soon as I try to create a
terminal canvas. Is it something I am not doing right or is there a bug? I am
able to run rackterm/xterm without error and that contains very similar code.
Here's my code:
#lang racket
(require racket/gui
rackterm/private/terminal-canvas
)
(define frame (new frame% [label "Example"]
(width 800)
(height 800)
))
(send frame show #t)
(define my-term (new terminal-canvas%
[parent frame]
[font-size 14]
[font-name "Courier"]
[term-var "rackterm"]
[command-and-args '("ls -lh")]
[set-title-callback (lambda (title) (send frame set-label
title))]
[horiz-margin 2]
[vert-margin 2]
))
The terminal window appears and then immediately closes with the following
error message:
"The evaluation thread is no longer running, so no evaluation can take place
until the next execution.
Exited successfully."
Well, this is caused by my not having actually cleaned up the code for it to be
used in any sort of general way, rather than specifically only by my one xterm
(hence terminal canvas is still in the private directory). But there is a
`handle-subproc-ended` method that I put a TODO in to make it configurable, but
currently just kills the canvas, because usually you want an xterm to close
when the shell inside it exits. But you could make a subclass that overrides
that method, or even better, improve my bad code and send a pull request. Or
eventually I'll fix things up and release them properly.
Also '("ls -lh") should be '("ls" "-lh").
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[racket-users] Rackterm error
I'm trying out Rackterm for the purpose of running commands put together from a
GUI but it looks like the thread is crashing as soon as I try to create a
terminal canvas. Is it something I am not doing right or is there a bug? I am
able to run rackterm/xterm without error and that contains very similar code.
Here's my code:
#lang racket
(require racket/gui
rackterm/private/terminal-canvas
)
(define frame (new frame% [label "Example"]
(width 800)
(height 800)
))
(send frame show #t)
(define my-term (new terminal-canvas%
[parent frame]
[font-size 14]
[font-name "Courier"]
[term-var "rackterm"]
[command-and-args '("ls -lh")]
[set-title-callback (lambda (title) (send frame set-label
title))]
[horiz-margin 2]
[vert-margin 2]
))
The terminal window appears and then immediately closes with the following
error message:
"The evaluation thread is no longer running, so no evaluation can take place
until the next execution.
Exited successfully."
--
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"Racket Users" group.
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