Forum: FXRuby FXTREE connect

Hello to all user

I have problem with FXTree and connect
when I use connect(SEL_DOUBLECLICKED)

then will use evaluate
SEL_SELECTED
SEL_CLICKED
SEL_SELECTED
SEL_DOUBLEDLICKED

why will two times SEL_SELECT
and  SEL_CLICKED


example
    @tree.connect(SEL_SELECTED) do |sender, selector, data|
      STDOUT.print "SEL_SELECTED #{data}\n"
      STDOUT.print Fox.fxrubyversion
      STDOUT.print "SEL_SELECTED Exit\n"
      STDOUT.flush
    end
    @tree.connect(SEL_RIGHTBUTTONPRESS) do |sender, selector, data|
    STDOUT.print "SEL_RIGHTBUTTONPRESS #{data}\n"
    STDOUT.print "SEL_RIGHTBUTTONPRESS Exit\n"
    STDOUT.flush
    end
    @tree.connect(SEL_CLICKED) do |sender, selector, data|
     STDOUT.print "SEL_CLICKED #{data}\n"
     STDOUT.print "SEL_CLICKED Exit\n"
     STDOUT.flush
    end
    @tree.connect(SEL_DOUBLECLICKED) do |sender, selector, data|
      STDOUT.print "SEL_DOUBLECLICKED #{data}\n"
      STDOUT.flush
      STDOUT.print "SEL_DOUBLECLICKED Exit\n"
      STDOUT.flush
    end

ruby will display


SEL_SELECTED Abgelegtet Prozesse
1.6.19SEL_SELECTED Exit
SEL_CLICKED Abgelegtet Prozesse
SEL_CLICKED Exit
SEL_SELECTED Abgelegtet Prozesse
1.6.19SEL_SELECTED Exit
SEL_DOUBLECLICKED Abgelegtet Prozesse
SEL_DOUBLECLICKED Exit

you can see two times SEL_SELECTED
and SEL_CLICKED

Why