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Gtk2::Ex::FormFactory::Proxy.3pm

NAME

Gtk2::Ex::FormFactory::Proxy - Proxy class for application objects

SYNOPSIS

   #-- Proxies are always created through
   #-- Gtk2::Ex::FormFactory::Context, never
   #-- directly by the application.
 
   Gtk2::Ex::FormFactory::Proxy->new (
     context              => Gtk2::Ex::FormFactory::Context,
     object               => Object instance or CODEREF,
     name                 => Name of this proxy,
     set_prefix           => Method prefix for write accessors,
     get_prefix           => Method prefix for read accessors,
     attr_accessors_href  => Hashref with accessor callbacks,
     attr_activity_href   => Hashref with activity callbacks,
     aggregated_by        => Fully qualified attribute of the parent,
     changes_attr_filter  => Regex for attributes which should not trigger
                             the object's 'changed' status
   );
 
 

DESCRIPTION

This class implements a generic proxy mechanism for accessing application objects and their attributes. It defines attributes of the associated object are accessed. You never instantiate objects of this class by yourself; they're created internally by Gtk2::Ex::FormFactory::Context when adding objects with the Context->add_object() method.

But you may use the proxy objects e.g. for updates which affect the application object and the GUI as well.

You can receive Proxy objects using the Gtk2::Ex::FormFactory::Context->get_proxy() method.

OBJECT HIERARCHY

   Gtk2::Ex::FormFactory::Proxy
 
 

ATTRIBUTES

Attributes are handled through the common get_ATTR(), set_ATTR() style accessors.

context = Gtk2::Ex::FormFactory::Context [mandatory]

The Context this proxy belongs to.

object = Object instance | CODEREF

The application object itself or a code reference, which returns the object instance.

name = SCALAR [mandatory]

The Context wide unique name of this Proxy.

set_prefix = SCALAR [optional]

This is the method prefix for write accessors. Defaults to set_.

get_prefix = SCALAR [optional]

This is the method prefix for read accessors. Defaults to get_.

attr_accessors_href = HASHREF [optional]

With this hash you can override specific accessors with a code reference, which is called instead of the object's own accessor.

Refer to Gtk2::Ex::FormFactory::Context->add_object for details.

attr_activity_href = HASHREF [optional]

This hash defines callbacks for attributes which return the activity state of the corresonding attribute.

Refer to Gtk2::Ex::FormFactory::Context->add_object for details.

aggregated_by = object.attr [optional]

Fully qualified attribute of the parent aggregating this object

Refer to Gtk2::Ex::FormFactory::Context->add_object for details.

changes_attr_filter = REGEX [optional]

Refer to Gtk2::Ex::FormFactory::Context->add_object for details.

object_changed = BOOLEAN

This flag indicates whether the object represented by this Proxy was changed. You may set this attribute to reset the object's changed state.

METHODS

$app_object = $proxy->get_object ()

This returns the actual application object of this Proxy, either the statical assigned instance or a dynamicly retrieved instance.

$proxy->set_object ($object)

Changes the application object instance in this Proxy. All dependend Widgets on the GUI are updated accordingly.

$app_object_attr_value = $proxy->get_attr ($attr)

Returns the application object's attribute $attr of this Proxy.

If $attr has the form ``object.attr'' the attribute of the correspondent object is retreived, instead of the object associated with this proxy.

$proxy->set_attr ($attr => $value)

Changes the application object's attribute $attr to $value and updates all dependend Widgets on the GUI accordingly.

If $attr has the form ``object.attr'' the correspondent object will be updated, instead of the object associated with this proxy.

$proxy->set_attrs ( { $attr => $value, ... } )

Changes a bunch of application object's attributes, which is passed as a hash reference with $attr => $value pairs and updates all dependend Widgets on the GUI accordingly.

$activity = $proxy->get_attr_activity ($attr)

Returns the current activity state of $attr.

AUTHORS

  JA~Xrn Reder <joern at zyn dot de>
 
 

COPYRIGHT AND LICENSE

Copyright 2004-2006 by JA~Xrn Reder.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details.

You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA.