wxruby users - Jan 2008 - lose focus event?

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I''m new to wxruby, and I haven''t found any answer with google:
Is
there a way to capture a lose focus event on controls, such as a combo  
box? All my experiments show events when changing the text, but not  
when leaving the box.

I want to make a combobox that autocompletes if I press tab (or down  
arrow or something), but if I click out or hit enter it needs to  
prompt me to add a new value.   I''m trying to duplicate a behaviour in
an Access app - I''d really like to ditch Access!


On a higher level explanation, in case there''s a better way to do it...

I want it to search as I type, displaying possible matches, and let me  
complete with one of the matches, or if there is no match use the  
current search to create a new record.

David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda@dgrmm.net



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Hello David,

First off, welcome to the wxRuby community.  Always nice to see new faces
around, and more interest being sparked in wxRuby, especially since it is
getting more stable with every release we make.  To capture Focus Lost, you
would need to use evt_kill_focus(), this detects when a control looses
focus.  It''s specifically for Windows, but since 99.9 percent of the
classes
we use in wxRuby, are derived from wxWindow, you should be able to utilize
the evt_kill_focus() to detect when a control (Such as a combo box), has
lost focus.

Don''t think we have a full example of evt_kill_focus() and
it''s counterpart
evt_set_focus(), but it''s pretty simple, and you can find the docs for
it
here: http://wxruby.rubyforge.org/doc/focusevent.html

If you have any more questions, feel free to ask, we''re more then happy
to
help out.

L8ers,

Mario Steele

On 1/19/08, David Morton <mortonda at dgrmm.net>
wrote:
>
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>
> I''m new to wxruby, and I haven''t found any answer with
google:  Is
> there a way to capture a lose focus event on controls, such as a combo
> box? All my experiments show events when changing the text, but not
> when leaving the box.
>
> I want to make a combobox that autocompletes if I press tab (or down
> arrow or something), but if I click out or hit enter it needs to
> prompt me to add a new value.   I''m trying to duplicate a
behaviour in
> an Access app - I''d really like to ditch Access!
>
>
> On a higher level explanation, in case there''s a better way to do
it...
>
> I want it to search as I type, displaying possible matches, and let me
> complete with one of the matches, or if there is no match use the
> current search to create a new record.
>
> David Morton
> Maia Mailguard http://www.maiamailguard.com
> mortonda at dgrmm.net
>
>
>
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> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>


-- 
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
http://rubyforge.org/projects/vwmc/
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On Jan 19, 2008, at 11:39 AM, Mario Steele wrote:
> Hello David,
>
> First off, welcome to the wxRuby community.  Always nice to see new  
> faces around, and more interest being sparked in wxRuby, especially  
> since it is getting more stable with every release we make.  To  
> capture Focus Lost, you would need to use evt_kill_focus(), this  
> detects when a control looses focus.  It''s specifically for
Windows,
> but since 99.9 percent of the classes we use in wxRuby, are derived  
> from wxWindow, you should be able to utilize the evt_kill_focus() to  
> detect when a control (Such as a combo box), has lost focus.
>
> Don''t think we have a full example of evt_kill_focus() and
it''s
> counterpart evt_set_focus(), but it''s pretty simple, and you can  
> find the docs for it here: http://wxruby.rubyforge.org/doc/focusevent.html
>
> If you have any more questions, feel free to ask, we''re more then
> happy to help out.
>

Thanks for the generous welcome.  I''m usually a unix person, and web  
based, but got roped into working on an Access project. (Hence why I''d
rather do this in ruby)

GUI stuff by hand is quite new to me. :)

I see that event firing, but it appears global, firing for everything  
that loses focus.  I''ve tried to identify what object was responsible  
via #get_event_object, #get_id, and  #id, but no luck so far.  How do  
I associate it with the combo box?

require ''rubygems''

require "wx"
include Wx

class HelloWorld < App
    def on_init
      helloframe = Frame.new(nil, -1, "Hello World")

      button = Button.new(helloframe, :label => ''Close'',
:pos =>
[200,200])
      evt_button(button) {exit}
      cbo = ComboBox.new(helloframe,
                         :pos =>Point.new(10,10),
                         :choices => ["foo","bar"],
                         :value => "asdasd",
                         :style => CB_SORT)
      helloframe.show()
      evt_set_focus() {|w|
        # how do I tie this to cbo ?
        }
    end
  end
  HelloWorld.new.main_loop




David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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>
> I see that event firing, but it appears global, firing for everything
> that loses focus.  I''ve tried to identify what object was
responsible
> via #get_event_object, #get_id, and  #id, but no luck so far.  How do
> I associate it with the combo box?

I found and example in
HTTP://wxruby.rubyforge.org/svn/trunk/wxruby2/samples/controls/

but it doesn''t work.  Did you mean MS Windows when you said it was  
related to windows, or WX windows?

class MyComboBox < ComboBox
   def initialize(*args)
     super(*args)#, style)

     evt_set_focus {|event| onFocusGot(event)}
   end


   def onFocusGot(event)
	log_message("MyComboBox::OnFocusGot")
     event.skip()
   end

end



David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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evt_focus does capture all focus changes.  The thing to do, is utilize
EvtFocus.get_window, that will return the window that the focus is being
called for.

On 1/19/08, David Morton <mortonda at dgrmm.net>
wrote:
>
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> Hash: SHA1
>
> >
> > I see that event firing, but it appears global, firing for everything
> > that loses focus.  I''ve tried to identify what object was
responsible
> > via #get_event_object, #get_id, and  #id, but no luck so far.  How do
> > I associate it with the combo box?
>
>
> I found and example in
> HTTP://wxruby.rubyforge.org/svn/trunk/wxruby2/samples/controls/
>
> but it doesn''t work.  Did you mean MS Windows when you said it was
> related to windows, or WX windows?
>
> class MyComboBox < ComboBox
>    def initialize(*args)
>      super(*args)#, style)
>
>      evt_set_focus {|event| onFocusGot(event)}
>    end
>
>
>    def onFocusGot(event)
>         log_message("MyComboBox::OnFocusGot")
>      event.skip()
>    end
>
> end
>
>
>
> David Morton
> Maia Mailguard http://www.maiamailguard.com
> mortonda at dgrmm.net
>
>
>
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> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>


-- 
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
http://rubyforge.org/projects/vwmc/
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On Jan 19, 2008, at 6:22 PM, Mario Steele wrote:
> evt_focus does capture all focus changes.  The thing to do, is  
> utilize EvtFocus.get_window, that will return the window that the  
> focus is being called for.
test.rb:63:in `on_init'': undefined method
''get_window'' for
#<Wx::FocusEvent:0x11d26a98> (NoMethodError)
         from test.rb:68:in `call''
         from test.rb:68:in `main_loop''
         from test.rb:68


class HelloWorld < App
    def on_init
      helloframe = Frame.new(nil, -1, "Hello World")

      button = Button.new(helloframe, :label => ''Close'',
:pos =>
[200,200])
      evt_button(button) {exit}
      cbo = MyComboBox.new(helloframe,
                         :pos =>Point.new(10,10),
                         :choices => ["foo","bar"],
                         :value => "asdasd",
                         :style => CB_SORT)
      helloframe.show()
     evt_set_focus() {|w|
        puts w.get_window
        # how do I tie this to cbo ?
     }
    end
  end
  HelloWorld.new.main_loop





David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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 From what I can tell from various wxwidget sources, it seems that  
most controls do not send the event up to the control level, and I saw  
one post that was attempting to bind an event... is this the  
EvtHandler#connect method?

On Jan 19, 2008, at 6:22 PM, Mario Steele wrote:
> evt_focus does capture all focus changes.  The thing to do, is  
> utilize EvtFocus.get_window, that will return the window that the  
> focus is being called for.
>
> On 1/19/08, David Morton <mortonda at dgrmm.net> wrote: -----BEGIN
PGP
> SIGNED MESSAGE-----
> Hash: SHA1
>
> >
> > I see that event firing, but it appears global, firing for  
> everything
> > that loses focus.  I''ve tried to identify what object was  
> responsible
> > via #get_event_object, #get_id, and  #id, but no luck so far.  How  
> do
> > I associate it with the combo box?
>
>
> I found and example in
HTTP://wxruby.rubyforge.org/svn/trunk/wxruby2/samples/controls/
>
> but it doesn''t work.  Did you mean MS Windows when you said it was
> related to windows, or WX windows?
>
> class MyComboBox < ComboBox
>    def initialize(*args)
>      super(*args)#, style)
>
>      evt_set_focus {|event| onFocusGot(event)}
>    end
>
>
>    def onFocusGot(event)
>         log_message("MyComboBox::OnFocusGot")
>      event.skip()
>    end
>
> end
>
>
>
> David Morton
> Maia Mailguard http://www.maiamailguard.com
> mortonda at dgrmm.net
>
>
>
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> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>
>
>
> -- 
> Mario Steele
> http://www.trilake.net
> http://www.ruby-im.net
> http://rubyforge.org/projects/wxruby/
> http://rubyforge.org/projects/wxride/
> http://rubyforge.org/projects/vwmc/  
> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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Hi David

David Morton wrote:
> I see that event firing, but it appears global, firing for everything  
> that loses focus.  I''ve tried to identify what object was
responsible
> via #get_event_object, #get_id, and  #id, but no luck so far.  How do  
> I associate it with the combo box?
>   
FocusEvents aren''t CommandEvents, so they don''t
"bubble" upwards to
parent widgets. So I think you need to call the evt_kill_focus method on 
each ComboBox instance. Have a look at the event handling tutorial in 
the main API docs for more info.

get_event_object should return the widget that triggered any event.
>       cbo = ComboBox.new(helloframe,
>                          :pos =>Point.new(10,10),
>                          :choices => ["foo","bar"],
>                          :value => "asdasd",
>                          :style => CB_SORT)
>       helloframe.show()
>       evt_set_focus() {|w|
>         # how do I tie this to cbo ?
>         }
>     end
try:
cbo.evt_set_focus { ... }

Note that there''s a bug on OS X that means ComboBoxes aren''t
firing
evt_kill_focus for some reason. But it should work fine on Windows or Linux.

hth
alex

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Starting over on this thread.  I found an example in the sample code  
controls/controls.rb  around line 110-149:


class MyComboBox < ComboBox
   def initialize(parent,id,value = EmptyString,
                   pos = DEFAULT_POSITION,
                   size = DEFAULT_SIZE,
                   choices = [],
                   style = 0)
     super(parent, id, value, pos, size, choices)#, style)

     evt_char {|event| onChar(event)}
     evt_key_down {|event| onKeyDown(event)}
     evt_key_up {|event| onKeyUp(event)}

     evt_set_focus {|event| onFocusGot(event)}
   end

  # [snip]

   def onFocusGot(event)
	log_message("MyComboBox::OnFocusGot")
     event.skip()
   end
end

I uncommented that log_message call in onFocusGot().  It works in  
WinXP, but it does not work in OS X.  In XP, I get a popup with that  
message, but in OS X, nothing happens at all. Eventually the pp is  
going to be used in XP, but I''d like to develop on OS X.  Any ideas?




David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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On Jan 20, 2008, at 6:07 PM, Alex Fenton wrote:
>
> Note that there''s a bug on OS X that means ComboBoxes
aren''t firing
> evt_kill_focus for some reason. But it should work fine on Windows  
> or Linux.

Hah, I just fired off a message about that. lol. Is this a wxwidgets  
thing, or a deeper OS X thing?

David Morton
Maia Mailguard http://www.maiamailguard.com
mortonda at dgrmm.net



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David Morton wrote:
> I uncommented that log_message call in onFocusGot().  It works in  
> WinXP, but it does not work in OS X.  In XP, I get a popup with that  
> message, but in OS X, nothing happens at all. Eventually the pp is  
> going to be used in XP, but I''d like to develop on OS X.  Any
ideas?
>   
http://rubyforge.org/tracker/index.php?func=detail&aid=5532&group_id=35&atid=218

It''s a bug I would very much like to fix as I want to do something 
similar to what you describe in my own app. But I suspect it''s a 
wxWidgets problem, and haven''t got around to writing a C++ test case to
find out.

As a workaround you could use evt_child_focus, which definitely does 
work on OS X. You cna use get_window to see what child received focus, 
and if you track what the last focus was, you could see when the CB lost 
focus.

alex