Questions on cursors

Hi all,

Recently I started using FXRuby (on windows) for a prototype

visualization package.
'Til everything went nice and smooth. Thanks for a nice
toolkit.

One of the things I am trying to do is to map different
mousebutton
combinations to different interactions. To give feedback, I
would like
to update the cursor to indicate the interaction triggered.

My approach was to enable the wait cursor when the mouse
button was
pressed, and switch wait cursors for different combinations
of mouse
buttons. To see which combination of mouse buttons is
pressed, I use the
event.state property.

Could you please answer some questions:

1. When I press left & middle inside the canvas, move
the mouse outside
   the fx-window and release both buttons, I get only one
callback for
   the RELEASE, eventhough I keep the canvas grabbed. Is
this expected?

2. Is the beginWaitCursor / endWaitCursor / setWaitCursor
the right
   strategy? I've been playing around with setting the
cursors, but I
   get quite some crashes.

3. I've created a different default cursor, which I assign
to the
   DEF_ARROW_CURSOR. When I assign it to DEF_RARROW_CURSOR
too, I get a
   crash during exiting. Am I doing something wrong?

4. It seems defaultCursor= is an alias to setDefaultCursor.
However,
   this takes two parameters, which is kindof unexpected for
a
   set-property. Did I misunderstand the meaning of
defaultCursor= ?
  
Thanks for taking the time to answer my questions.

Groeten/Regards,

  Ronald.
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On Thursday 13 July 2006 07:55, Ronald Pijnacker wrote:
> Hi all,
> 
> Recently I started using FXRuby (on windows) for a
prototype 
> visualization package.
> 'Til everything went nice and smooth. Thanks for a
nice toolkit.
> 
> One of the things I am trying to do is to map different
mousebutton
> combinations to different interactions. To give
feedback, I would like
> to update the cursor to indicate the interaction
triggered.
> 
> My approach was to enable the wait cursor when the
mouse button was
> pressed, and switch wait cursors for different
combinations of mouse
> buttons. To see which combination of mouse buttons is
pressed, I use the
> event.state property.
> 
> Could you please answer some questions:
> 
> 1. When I press left & middle inside the canvas,
move the mouse outside
>    the fx-window and release both buttons, I get only
one callback for
>    the RELEASE, eventhough I keep the canvas grabbed.
Is this expected?
> 
> 2. Is the beginWaitCursor / endWaitCursor /
setWaitCursor the right
>    strategy? I've been playing around with setting the
cursors, but I
>    get quite some crashes.
> 
> 3. I've created a different default cursor, which I
assign to the
>    DEF_ARROW_CURSOR. When I assign it to
DEF_RARROW_CURSOR too, I get a
>    crash during exiting. Am I doing something wrong?
> 
> 4. It seems defaultCursor= is an alias to
setDefaultCursor. However,
>    this takes two parameters, which is kindof
unexpected for a
>    set-property. Did I misunderstand the meaning of
defaultCursor= ?
>   
> Thanks for taking the time to answer my questions.
> 
> Groeten/Regards,

1) If the first RELEASE causes the widget to ungrab(), the
second
   RELEASE will go to the widget under the cursor.

2) I'd reserve beginWaitCursor()/endWaitCursor() for
situations where
   the GUI is "busy" for a long while, e.g. when
reading files.
   If you just want to change the cursor duing a grab,
change the
   grab cursor using setDragCursor(), and it will be
automatically
   used while the grab is in effect.

3) These are really "stock cursors" and they can
be changed only BEFORE
   creating any widgets; when a widget is created, it gets
its cursor
   from FXApp; you can use this to install your own custom
cursor-theme
   if you need.  It affects ALL widgets.

   Rather than changing FXApp's cursors, I recommend
changing the cursor
   of a specific widget only, using setDefaultCursor() and
setDragCursor().

4) This is an FXRuby question for Lyle I think; I can only
say that in FOX
   itself there's only 1 parameter, the cursor...


Groeten,


		Jeroen


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| Copyright (C) 23:30 03/30/2006 Jeroen van der Zijp.   All
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