Re: [racket-users] interactive window in slideshow

[Nick]

Just updated to 6.5 on Ubuntu, but I can't get a control to focus. My issue is 
similar to http://lists.racket-lang.org/users/archive/2011-May/045317.html, I 
have a dialog with a choice% in it, and no matter when or how I (send choice 
focus), the choice will never focus without me having to type tab first. I've 
tried focus'ing before show'ing the dialog, and tried focus'ing in the dialog's 
on-activate, to no avail. Is there a workaround? Is there at least a way to 
fake a Tab key-event to the dialog to achieve the same effect? For my project 
I'm really hoping to have fast, seamless keyboard input.

On Monday, March 28, 2016 at 5:06:24 PM UTC-7, Byron Davies wrote:
> Thanks for looking into it.  No great hurry.
> 
> For now,  I just tell the kindergartners to click twice the first time 
> around, but  it will be a lot clearer once the  fix happens.
> 
> > On Mar 28, 2016, at 4:34 PM, Matthew Flatt  wrote:
> > 
> > At Mon, 28 Mar 2016 11:53:38 -0700, Byron Davies wrote:
> >> I have a single interactive pasteboard on a slideshow slide.  For a 
> >> learning 
> >> task, the user needs to click on objects on the pasteboard.  There’s a 
> >> little 
> >> glitch, however.  The user must first click on the pasteboard to make it 
> >> the 
> >> focus, and then click on the objects.  Is there a way to make the 
> >> pasteboard 
> >> become the focus when the mouse moves into it?
> > 
> > You should be able to use the `focus` method on the canvas after its
> > frame is shown (via `on-superwindow-show`) or when a mouse event is
> > received (via `on-event`). See below for an example.
> > 
> > But I see that `focus` doesn't work right for a canvas in a floating
> > frame, like the one used by `interactive`, so the example below doesn't
> > work with the current release or snapshot. I've pushed a repair to
> > `focus` for the next snapshot build. I don't have a workaround for the
> > current version, but I might be able to find one if that's needed.
> > 
> > 
> > 
> > #lang slideshow
> > (require racket/gui/base)
> > 
> > (define (make-pasteboard f)
> >  (define c%
> >(class editor-canvas%
> >  (super-new)
> >  (inherit focus)
> >  (define/override (on-superwindow-show on?)
> >(when on?
> >  (focus))
> >(super on-superwindow-show on?
> >  (define pb (new pasteboard%))
> >  (send pb insert-box) ; to demonstrate focus
> >  (new c% [parent f] [editor pb])
> >  void)
> > 
> > (slide)
> > 
> > (slide
> > #:title "Example"
> > (interactive (blank 500 500)
> >  make-pasteboard))
> >

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Re: [racket-users] interactive window in slideshow

[Byron Davies]

Thanks for looking into it.  No great hurry.

For now,  I just tell the kindergartners to click twice the first time around, 
but  it will be a lot clearer once the  fix happens.

> On Mar 28, 2016, at 4:34 PM, Matthew Flatt  wrote:
> 
> At Mon, 28 Mar 2016 11:53:38 -0700, Byron Davies wrote:
>> I have a single interactive pasteboard on a slideshow slide.  For a learning 
>> task, the user needs to click on objects on the pasteboard.  There’s a 
>> little 
>> glitch, however.  The user must first click on the pasteboard to make it the 
>> focus, and then click on the objects.  Is there a way to make the pasteboard 
>> become the focus when the mouse moves into it?
> 
> You should be able to use the `focus` method on the canvas after its
> frame is shown (via `on-superwindow-show`) or when a mouse event is
> received (via `on-event`). See below for an example.
> 
> But I see that `focus` doesn't work right for a canvas in a floating
> frame, like the one used by `interactive`, so the example below doesn't
> work with the current release or snapshot. I've pushed a repair to
> `focus` for the next snapshot build. I don't have a workaround for the
> current version, but I might be able to find one if that's needed.
> 
> 
> 
> #lang slideshow
> (require racket/gui/base)
> 
> (define (make-pasteboard f)
>  (define c%
>(class editor-canvas%
>  (super-new)
>  (inherit focus)
>  (define/override (on-superwindow-show on?)
>(when on?
>  (focus))
>(super on-superwindow-show on?
>  (define pb (new pasteboard%))
>  (send pb insert-box) ; to demonstrate focus
>  (new c% [parent f] [editor pb])
>  void)
> 
> (slide)
> 
> (slide
> #:title "Example"
> (interactive (blank 500 500)
>  make-pasteboard))
> 

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Re: [racket-users] interactive window in slideshow

[Matthew Flatt]

At Mon, 28 Mar 2016 11:53:38 -0700, Byron Davies wrote:
> I have a single interactive pasteboard on a slideshow slide.  For a learning 
> task, the user needs to click on objects on the pasteboard.  There’s a little 
> glitch, however.  The user must first click on the pasteboard to make it the 
> focus, and then click on the objects.  Is there a way to make the pasteboard 
> become the focus when the mouse moves into it?

You should be able to use the `focus` method on the canvas after its
frame is shown (via `on-superwindow-show`) or when a mouse event is
received (via `on-event`). See below for an example.

But I see that `focus` doesn't work right for a canvas in a floating
frame, like the one used by `interactive`, so the example below doesn't
work with the current release or snapshot. I've pushed a repair to
`focus` for the next snapshot build. I don't have a workaround for the
current version, but I might be able to find one if that's needed.



#lang slideshow
(require racket/gui/base)

(define (make-pasteboard f)
  (define c%
(class editor-canvas%
  (super-new)
  (inherit focus)
  (define/override (on-superwindow-show on?)
(when on?
  (focus))
(super on-superwindow-show on?
  (define pb (new pasteboard%))
  (send pb insert-box) ; to demonstrate focus
  (new c% [parent f] [editor pb])
  void)

(slide)

(slide
 #:title "Example"
 (interactive (blank 500 500)
  make-pasteboard))

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[racket-users] interactive window in slideshow

[Byron Davies]

I have a single interactive pasteboard on a slideshow slide.  For a learning 
task, the user needs to click on objects on the pasteboard.  There’s a little 
glitch, however.  The user must first click on the pasteboard to make it the 
focus, and then click on the objects.  Is there a way to make the pasteboard 
become the focus when the mouse moves into it?

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