fxruby users - Oct 2006 - Add a tab to a tabbok dynamically?

Hi,

I cannot figure out how to add a tab to a tabbook dynamically, while the program
is running.

Does anyone know how to force the tab to appear? I tried calling recalc,
repaint, layout or forceRefresh, but no success... Below is a small example.

Thanks!

Philippe

P.S. Windows XP SP2, Ruby 1.8.4, FXRuby-1.6.2-ruby184.exe

-----------------------------

#!/usr/bin/ruby

require ''fox16''

include Fox

class MyWindow < FXMainWindow
    
  def initialize(app)

    super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 600, 350)

    # Menu bar stretched along the top of the main window
    menubar = FXMenuBar.new(self, LAYOUT_SIDE_TOP|LAYOUT_FILL_X)
  
    # File menu
    filemenu = FXMenuPane.new(self)
    FXMenuTitle.new(menubar, "&File", nil, filemenu)
    FXMenuCommand.new(filemenu, "&Quit\tCtl-Q\tQuit the
application",
        nil, app, FXApp::ID_QUIT)

    # Tab menu
    tabmenu = FXMenuPane.new(self)
    FXMenuTitle.new(menubar, "Tab", nil, tabmenu)
    FXMenuCommand.new(tabmenu, "Add a tab").connect(SEL_COMMAND,
method(:onAddTab))

    # Tabbook
    @tabbook = FXTabBook.new(self, nil, 0,
        LAYOUT_FILL_X|LAYOUT_FILL_Y|LAYOUT_RIGHT)
    
    # First tab
    FXTabItem.new(@tabbook, "Tab 1", nil)
    FXVerticalFrame.new(@tabbook,
        LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_THICK|FRAME_RAISED)
    
  end
  
  def onAddTab(sender, sel, data)
      puts "A tab is added..."
      FXTabItem.new(@tabbook, "Another tab", nil)
      FXVerticalFrame.new(@tabbook,
          LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_THICK|FRAME_RAISED)
      
      self.recalc
      self.repaint
      self.layout
      self.forceRefresh
      
      @tabbook.recalc
      @tabbook.repaint
      @tabbook.layout
      @tabbook.forceRefresh
  end

  def create
    super
    show(PLACEMENT_SCREEN)
  end

end

if __FILE__ == $0
  application = FXApp.new("Attik System", "FXRuby Test")
  MyWindow.new(application)
  application.create
  application.run
end


---------------
Philippe Lang
Attik System

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On Oct 3, 2006, at 5:52 AM, Philippe Lang wrote:
> I cannot figure out how to add a tab to a tabbook dynamically,  
> while the program is running.
>
> Does anyone know how to force the tab to appear? I tried calling  
> recalc, repaint, layout or forceRefresh, but no success... Below is  
> a small example.
<snip>
>   def onAddTab(sender, sel, data)
>       puts "A tab is added..."
>       FXTabItem.new(@tabbook, "Another tab", nil)
>       FXVerticalFrame.new(@tabbook,
>           LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_THICK|FRAME_RAISED)
>
>       self.recalc
>       self.repaint
>       self.layout
>       self.forceRefresh
>
>       @tabbook.recalc
>       @tabbook.repaint
>       @tabbook.layout
>       @tabbook.forceRefresh
>   end
You need to call create() on the new tab item and vertical frame.  
Another way would be to call create() on their parent (@tabbook). You  
don''t need any of that other stuff (i.e. the calls to recalc,  
repaint, layout and forceRefresh).

On Tuesday 03 October 2006 05:52, Philippe Lang wrote:
> Hi,
> 
> I cannot figure out how to add a tab to a tabbook dynamically, while the
program is running.
> 
> Does anyone know how to force the tab to appear? I tried calling recalc,
repaint, layout or forceRefresh, but no success... Below is a small example.
> 
> Thanks!
> 
> Philippe
> 
> P.S. Windows XP SP2, Ruby 1.8.4, FXRuby-1.6.2-ruby184.exe
> 
> -----------------------------
> 
> #!/usr/bin/ruby
> 
> require ''fox16''
> 
> include Fox
> 
> class MyWindow < FXMainWindow
>     
>   def initialize(app)
> 
>     super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 600, 350)
> 
>     # Menu bar stretched along the top of the main window
>     menubar = FXMenuBar.new(self, LAYOUT_SIDE_TOP|LAYOUT_FILL_X)
>   
>     # File menu
>     filemenu = FXMenuPane.new(self)
>     FXMenuTitle.new(menubar, "&File", nil, filemenu)
>     FXMenuCommand.new(filemenu, "&Quit\tCtl-Q\tQuit the
application",
>         nil, app, FXApp::ID_QUIT)
> 
>     # Tab menu
>     tabmenu = FXMenuPane.new(self)
>     FXMenuTitle.new(menubar, "Tab", nil, tabmenu)
>     FXMenuCommand.new(tabmenu, "Add a tab").connect(SEL_COMMAND,
method(:onAddTab))
> 
>     # Tabbook
>     @tabbook = FXTabBook.new(self, nil, 0,
>         LAYOUT_FILL_X|LAYOUT_FILL_Y|LAYOUT_RIGHT)
>     
>     # First tab
>     FXTabItem.new(@tabbook, "Tab 1", nil)
>     FXVerticalFrame.new(@tabbook,
>         LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_THICK|FRAME_RAISED)
>     
>   end
>   
>   def onAddTab(sender, sel, data)
>       puts "A tab is added..."
>       FXTabItem.new(@tabbook, "Another tab", nil)
>       FXVerticalFrame.new(@tabbook,
>           LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_THICK|FRAME_RAISED)
>       
>       self.recalc
>       self.repaint
>       self.layout
>       self.forceRefresh
>       
>       @tabbook.recalc
>       @tabbook.repaint
>       @tabbook.layout
>       @tabbook.forceRefresh
>   end
> 
>   def create
>     super
>     show(PLACEMENT_SCREEN)
>   end
> 
> end
> 
> if __FILE__ == $0
>   application = FXApp.new("Attik System", "FXRuby
Test")
>   MyWindow.new(application)
>   application.create
>   application.run
> end
If you add new widgets on the fly, don''t forget to .create them.  The
ones that exist at the time you call application.create will be recursively
created, new ones weren''t part of the widget tree yet at that time.

You were right about recalc, although you should call it on the widget
you added the new children to [in this case, tabbook.  The call to
recalc flags the tabbook''s layout as "dirty", and when
control returns
to the event loop it will perform a layout on the dialog.

In FOX, layouts are delayed, which means you can make many changes to
your widget tree, but incur the cost of the [expensive] layout only
a single time.

Its therefore very rare that you want to call layout directly; most of
the time recalc suffices.  Recalc is cheap because all it does is set
dirty flags on a couple of widgets.



		- Jeroen

Jeroen van der Zijp wrote:
> If you add new widgets on the fly, don''t forget to .create
> them.  The ones that exist at the time you call
> application.create will be recursively created, new ones
> weren''t part of the widget tree yet at that time.
> 
> You were right about recalc, although you should call it on
> the widget you added the new children to [in this case,
> tabbook.  The call to recalc flags the tabbook''s layout as
> "dirty", and when control returns to the event loop it will
> perform a layout on the dialog.
> 
> In FOX, layouts are delayed, which means you can make many
> changes to your widget tree, but incur the cost of the
> [expensive] layout only a single time.
> 
> Its therefore very rare that you want to call layout
> directly; most of the time recalc suffices.  Recalc is cheap
> because all it does is set dirty flags on a couple of widgets.
It works great, thanks a lot for your help.

Cheers,

---------------
Philippe Lang
Attik System

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