SignalSlot(3)         User Contributed Perl Documentation        SignalSlot(3)



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      Tk::SignalSlot - An alternative to Tk::bind

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          use Tk::SignalSlot;

          $w->connect(’<1>’ => \&callback1);
          $w->connect(’<1>’ => \&callback2);

          my $id = $w->connect(’<<Event>>’ => \&callback3);
          ...
          $w->disconnect($id) if $w->is_connected($id);


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      TTTTkkkk::::::::SSSSiiiiggggnnnnaaaallllSSSSllllooootttt provides an alternative to Tk::bind that is more similar
      to Qt’s signal/slot mechanism. The main idea is that multiple callbacks
      can now be bound to one event. This allows for a more modular and
      object-oriented approach to Tk::bind which results in simpler, and eas-
      ier to maintain code.

      Please see the section on "RESTRICTIONS" for some important informa-
      tion.

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      TTTTkkkk::::::::SSSSiiiinnnnggggaaaallllSSSSllllooootttt exports three new methods into the TTTTkkkk:::::::: namespace:

      _$_w_i_d_g_e_t->ccccoooonnnnnnnneeeecccctttt(_e_v_e_n_t, _c_a_l_l_b_a_c_k)
          This method connects the given callback to the event. This means
          that when the event is triggered, this callback will be executed.
          Any number of callbacks can be connected to any one event. When the
          event fires, all connected callbacks will execute in the order they
          were connected. _e_v_e_n_t is any valid Tk event, and _c_a_l_l_b_a_c_k is any
          valid Tk callback.

          Upon success, this method returns a unique ID that can be used in
          the _dd_ii_ss_cc_oo_nn_nn_ee_cc_tt_((_)) method below.

      _$_w_i_d_g_e_t->ddddiiiissssccccoooonnnnnnnneeeecccctttt(_I_D);
          Given a valid ID (returned by the _cc_oo_nn_nn_ee_cc_tt_((_)) mmmmeeeetttthhhhoooodddd), this method
          disconnects the associated callback from the event.  Obviously,
          this means that when the event fires, this callback will not be
          executed.

      _$_w_i_d_g_e_t->iiiissss____ccccoooonnnnnnnneeeecccctttteeeedddd(_I_D);
          Returns 1 if the given ID is that of a validly connected callback.
          Otherwise, returns 0;

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      If you decide to use TTTTkkkk::::::::SSSSiiiiggggnnnnaaaallllSSSSllllooootttt, then you should stick with it
      thoroughtout your program. Intermixing TTTTkkkk::::::::SSSSiiiiggggnnnnaaaallllSSSSllllooootttt with TTTTkkkk::::::::bbbbiiiinnnndddd can
      have some unpredictable effects since TTTTkkkk::::::::SSSSiiiiggggnnnnaaaallllSSSSllllooootttt uses TTTTkkkk::::::::bbbbiiiinnnndddd
      internally.

BBBBUUUUGGGGSSSS
      None so far.

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      AAAAllllaaaa QQQQuuuummmmssssiiiieeeehhhh <[email protected]>

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      Copyright (c) 2006 Ala Qumsieh. All rights reserved.

      This program is free software; you can redistribute it and/or modify it
      under the same terms as Perl itself.



3rd Berkeley Distribution         perl v5.6.1                    SignalSlot(3)

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