fxruby-users

[Fxruby-users] Usage FXList : makeItemVisible

[SIMOKAWA h. <h-s...@aa...>]

Hello all,
  
 I am trying to do something with FxRuby, but it is not working for me. 
I want to scroll to bring a item into view, but I cannot it. 
Below is my code.

Thanks for the help in advance

SIMOKAWA, hajime (male,japan)



require 'fox'
include Fox

class ListTestWindow < FXMainWindow
  def initialize(app)
    super(app, "fxtest", nil, nil, DECOR_ALL, 0, 0, 100, 100)

    @lst = FXList.new(self,4,nil,0,LIST_NORMAL |LAYOUT_FILL_X)
    @lst.appendItem '0'
    @lst.appendItem '1'
    @lst.appendItem '2'
    @lst.appendItem '3'
    @lst.appendItem '4'
    @lst.appendItem '5'
    @lst.appendItem '6'
    @lst.appendItem '7'
    @lst.appendItem '8'
    @lst.appendItem '9'

    @lst.makeItemVisible 7 

  end

  def create
    super
    show(PLACEMENT_SCREEN)
  end
end

if __FILE__ == $0
  app = FXApp.new("FoxTest", "FoxTest")
  ListTestWindow.new(app)
  app.create
  app.run
end

Re: [Fxruby-users] Usage FXList : makeItemVisible

[Dalibor S. <da...@in...>]

Hi.

The method makeItemVisible takes a tree item as the argument - not the item
index.
Try replacing your code with:

item7 = @lst.appendItem '7'
@lst.appendItem '8'
@lst.appendItem '9'
@lst.makeItemVisible item7

Regards,

Dalibor

-- 
Dalibor Sramek  http://www.insula.cz/dali  |  In the eyes of cats, 
                dal...@in...   |  all things belong to cats. 



Quoting SIMOKAWA hajime <h-s...@aa...>:

> Hello all,
>   
>  I am trying to do something with FxRuby, but it is not working for me. 
> I want to scroll to bring a item into view, but I cannot it. 
> Below is my code.
> 
> Thanks for the help in advance
> 
> SIMOKAWA, hajime (male,japan)
> 
> 
> 
> require 'fox'
> include Fox
> 
> class ListTestWindow < FXMainWindow
>   def initialize(app)
>     super(app, "fxtest", nil, nil, DECOR_ALL, 0, 0, 100, 100)
> 
>     @lst = FXList.new(self,4,nil,0,LIST_NORMAL |LAYOUT_FILL_X)
>     @lst.appendItem '0'
>     @lst.appendItem '1'
>     @lst.appendItem '2'
>     @lst.appendItem '3'
>     @lst.appendItem '4'
>     @lst.appendItem '5'
>     @lst.appendItem '6'
>     @lst.appendItem '7'
>     @lst.appendItem '8'
>     @lst.appendItem '9'
> 
>     @lst.makeItemVisible 7 
> 
>   end
> 
>   def create
>     super
>     show(PLACEMENT_SCREEN)
>   end
> end
> 
> if __FILE__ == $0
>   app = FXApp.new("FoxTest", "FoxTest")
>   ListTestWindow.new(app)
>   app.create
>   app.run
> end
> 
> 
> 
> -------------------------------------------------------
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> 

Re: [Fxruby-users] Usage FXList : makeItemVisible

[meinrad r. <mei...@gm...>]

Dalibor Sramek wrote:
> Hi.
> 
> The method makeItemVisible takes a tree item as the argument - not the item
> index.
dalibor: where did you get this information?

here is what the online documentation for FXList#makeItemVisible says

------------------------------------------------
makeItemVisible(index)

Scroll to bring item into view. Raises IndexError if index is out of bounds.
-----------------------------------------------

> Try replacing your code with:
> 
> item7 = @lst.appendItem '7'
> @lst.appendItem '8'
> @lst.appendItem '9'
> @lst.makeItemVisible item7
> 
> Regards,
> 
> Dalibor

-- henon
> 

Re: [Fxruby-users] Usage FXList : makeItemVisible

[meinrad r. <mei...@gm...>]

Dalibor Sramek wrote:

> Hi.
> 
> The method makeItemVisible takes a tree item as the argument - not the item
> index.

[...]

ah, i see. you had treelist in mind.
actually this is an inconsistency issue that should be addressed to lyle.

FXTreeList#makeItemVisible(item)
FXList#makeItemVisible(index)

lyle: could it be implemented that makeItemVisible takes both an item or 
an index?

> 
> Regards,
> 
> Dalibor
> 

- henon

Re: [Fxruby-users] Usage FXList : makeItemVisible

[Lyle J. <jl...@cf...>]

meinrad recheis wrote:

> lyle: could it be implemented that makeItemVisible takes both an item or 
> an index?

Yes, I think this kind of overloading makes sense for FXIconList and 
FXList. Not sure that it is really useful for FXTreeList since that's 
not a flat list.

Re: [Fxruby-users] Usage FXList : makeItemVisible

[meinrad r. <mei...@gm...>]

SIMOKAWA hajime wrote:

> Hello all,
>   
hi,

>  I am trying to do something with FxRuby, but it is not working for me. 
> I want to scroll to bring a item into view, but I cannot it. 
> Below is my code.

the line
@lst.makeItemVisible 7
works well for me when inserted after show(PLACEMENT_SCREEN)
obviously this can only be used after creation of the list.
> 
> Thanks for the help in advance
> 
> SIMOKAWA, hajime (male,japan)
> 
regards,
-- henon
> 
> 
> require 'fox'
> include Fox
> 
> class ListTestWindow < FXMainWindow
>   def initialize(app)
>     super(app, "fxtest", nil, nil, DECOR_ALL, 0, 0, 100, 100)
> 
>     @lst = FXList.new(self,4,nil,0,LIST_NORMAL |LAYOUT_FILL_X)
>     @lst.appendItem '0'
>     @lst.appendItem '1'
>     @lst.appendItem '2'
>     @lst.appendItem '3'
>     @lst.appendItem '4'
>     @lst.appendItem '5'
>     @lst.appendItem '6'
>     @lst.appendItem '7'
>     @lst.appendItem '8'
>     @lst.appendItem '9'
> 
>     @lst.makeItemVisible 7 
> 
>   end
> 
>   def create
>     super
>     show(PLACEMENT_SCREEN)
       @lst.makeItemVisible 7

>   end
> end
> 
> if __FILE__ == $0
>   app = FXApp.new("FoxTest", "FoxTest")
>   ListTestWindow.new(app)
>   app.create
>   app.run
> end
> 
> 

Re: [Fxruby-users] Usage FXList : makeItemVisible

[SIMOKAWA h. <h-s...@aa...>]

Hello all.
Thanks for Dalibor Sramek and meinrad recheis.

I have confirmed that the 'makeItemVisible' works after 'show'.

Another Question:
The 'makeItemVisible' is not working just after 'clearItems'.
A 'create' is need before 'makeItemVisible'.
But when not just after, the 'create' is needless.

Below is my code.
If you delete line#2, btnV9 is not work.
If you delete line#1 and #2, btnV9 is work after pushing btnUp.

Thanks for the help in advance

SIMOKAWA, hajime (male,japan)



require 'fox'
include Fox

class ListTestWindow < FXMainWindow
  def initialize(app)
    super(app, "fxtest", nil, nil, DECOR_ALL, 0, 0, 100)

    @btnV0 = FXButton.new(self,'visible 0',nil,nil,0,BUTTON_NORMAL |LAYOUT_FILL_X)
    @lst = FXList.new(self,4,nil,0,LIST_NORMAL |LAYOUT_FILL_X)
    @btnV9 = FXButton.new(self,'visible 9',nil,nil,0,BUTTON_NORMAL |LAYOUT_FILL_X)
    @btnUp = FXButton.new(self,'update',nil,nil,0,BUTTON_NORMAL |LAYOUT_FILL_X)
    self.update_list

    @btnV0.connect(SEL_COMMAND){
      @lst.makeItemVisible 0
    } 
    @btnV9.connect(SEL_COMMAND){
      update_list  #1 when 'update' put here,
      create       #2 'create' must be after update
      @lst.makeItemVisible 9
    } 
    @btnUp.connect(SEL_COMMAND){
      update_list;  #3 'create' is needless
    } 
  end
  
  def update_list
    @lst.clearItems
    @lst.appendItem '0'
    @lst.appendItem '1'
    @lst.appendItem '2'
    @lst.appendItem '3'
    @lst.appendItem '4'
    @lst.appendItem '5'
    @lst.appendItem '6'
    @lst.appendItem '7'
    @lst.appendItem '8'
    @lst.appendItem '9'
  end

  def create
    super
    show(PLACEMENT_SCREEN)
  end
end

if __FILE__ == $0
  app = FXApp.new("FoxTest", "FoxTest")
  ListTestWindow.new(app)
  app.create
  app.run
end

Re: [Fxruby-users] Usage FXList : makeItemVisible

[Lyle J. <jl...@cf...>]

SIMOKAWA hajime wrote:

> Another Question:
> The 'makeItemVisible' is not working just after 'clearItems'.
> A 'create' is need before 'makeItemVisible'.

When you call clearItems() and, subsequently appendItem(), on the list, 
the list's layout is marked as dirty but it is not immediately 
reconciled. FOX uses a technique of delayed layout, which is described 
on this page from the FOX documentation:

	http://www.fox-toolkit.org/guiupdate.html

Under normal circumstances, the GUI layout will not actually be 
reconciled until we return to the main FOX event loop, i.e. until we 
exit the callback for @btnV9. The problem in your case is that 
makeItemVisible() assumes that the list's layout has already been 
reconciled, which it hasn't. So the solution is to do *something* to 
force the layout to be reconciled immediately, before the call to 
makeItemVisible(). Calling create() on the main window is one way to do 
this, but the more proper way is to call the FXApp#forceRefesh method:

	@btnV9.connect(SEL_COMMAND) {
		update_list
		app.forceRefresh	# reconcile layout immediately!
		@lst.makeItemVisible 9
	}

> But when not just after, the 'create' is needless.

Correct. In this case, the calls to clearItems() and appendItem() in 
@btnUp's callback:

	@btnUp.connect(SEL_COMMAND) {
		update_list
	}

Mark the list's layout as dirty, and shortly after we re-enter FOX's 
main event loop, the GUI layout is reconciled. Now any subsequent call 
to makeItemVisible() will work properly.

Hope this helps,

Lyle

Re: [Fxruby-users] Usage FXList : makeItemVisible

[SIMOKAWA h. <h-s...@aa...>]

Hello all, and thanks for all.

I understand and the 'makeItemVisible' is working very well.



Lyle Johnson <jl...@cf...> wrote:

> SIMOKAWA hajime wrote:
> 
> > Another Question:
> > The 'makeItemVisible' is not working just after 'clearItems'.
> > A 'create' is need before 'makeItemVisible'.
> 
> When you call clearItems() and, subsequently appendItem(), on the list, 
> the list's layout is marked as dirty but it is not immediately 
> reconciled. FOX uses a technique of delayed layout, which is described 
> on this page from the FOX documentation:
> 
> 	http://www.fox-toolkit.org/guiupdate.html
> 
> Under normal circumstances, the GUI layout will not actually be 
> reconciled until we return to the main FOX event loop, i.e. until we 
> exit the callback for @btnV9. The problem in your case is that 
> makeItemVisible() assumes that the list's layout has already been 
> reconciled, which it hasn't. So the solution is to do *something* to 
> force the layout to be reconciled immediately, before the call to 
> makeItemVisible(). Calling create() on the main window is one way to do 
> this, but the more proper way is to call the FXApp#forceRefesh method:
> 
> 	@btnV9.connect(SEL_COMMAND) {
> 		update_list
> 		app.forceRefresh	# reconcile layout immediately!
> 		@lst.makeItemVisible 9
> 	}
> 
> > But when not just after, the 'create' is needless.
> 
> Correct. In this case, the calls to clearItems() and appendItem() in 
> @btnUp's callback:
> 
> 	@btnUp.connect(SEL_COMMAND) {
> 		update_list
> 	}
> 
> Mark the list's layout as dirty, and shortly after we re-enter FOX's 
> main event loop, the GUI layout is reconciled. Now any subsequent call 
> to makeItemVisible() will work properly.
> 
> Hope this helps,
> 
> Lyle
> 
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by OSDN developer relations
> Here's your chance to show off your extensive product knowledge
> We want to know what you know. Tell us and you have a chance to win $100
> http://www.zoomerang.com/survey.zgi?HRPT1X3RYQNC5V4MLNSV3E54
> _______________________________________________
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> Fxr...@li...
> https://lists.sourceforge.net/lists/listinfo/fxruby-users


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