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// -*- c++ -*-
/* $Id$ */
/* propertyproxy_base.h
*
* Copyright 2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/propertyproxy_base.h>
#include <glibmm/signalproxy_connectionnode.h>
#include <glibmm/object.h>
#include <glibmm/private/object_p.h>
namespace Glib
{
PropertyProxyConnectionNode::PropertyProxyConnectionNode(const sigc::slot_base& slot, GObject* gobject)
: SignalProxyConnectionNode(slot, gobject)
{
}
void PropertyProxyConnectionNode::callback(GObject*, GParamSpec* pspec, gpointer data) //static
{
if(pspec && data)
{
if(sigc::slot_base *const slot = SignalProxyBase::data_to_slot(data))
(*static_cast<sigc::slot<void>*>(slot))();
}
}
//SignalProxyProperty implementation:
SignalProxyProperty::SignalProxyProperty(Glib::ObjectBase* obj, const gchar* property_name)
: SignalProxyBase(obj),
property_name_(property_name)
{
}
SignalProxyProperty::~SignalProxyProperty()
{
}
sigc::connection SignalProxyProperty::connect(const SlotType& sl)
{
// Create a proxy to hold our connection info
// This will be deleted by destroy_notify_handler.
PropertyProxyConnectionNode* pConnectionNode = new PropertyProxyConnectionNode(sl, obj_->gobj());
// connect it to gtk+
// pConnectionNode will be passed as the data argument to the callback.
// The callback will then call the virtual Object::property_change_notify() method,
// which will contain a switch/case statement which will examine the property name.
const Glib::ustring notify_signal_name = "notify::" + Glib::ustring(property_name_);
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(),
notify_signal_name.c_str(), (GCallback)(&PropertyProxyConnectionNode::callback), pConnectionNode,
&PropertyProxyConnectionNode::destroy_notify_handler,
G_CONNECT_AFTER);
return sigc::connection(pConnectionNode->slot_);
}
//PropertyProxy_Base implementation:
PropertyProxy_Base::PropertyProxy_Base(ObjectBase* obj, const char* property_name)
:
obj_ (obj),
property_name_ (property_name)
{}
PropertyProxy_Base::PropertyProxy_Base(const PropertyProxy_Base& other)
:
obj_ (other.obj_),
property_name_ (other.property_name_)
{}
SignalProxyProperty PropertyProxy_Base::signal_changed()
{
return SignalProxyProperty(obj_, property_name_);
}
void PropertyProxy_Base::set_property_(const Glib::ValueBase& value)
{
g_object_set_property(obj_->gobj(), property_name_, value.gobj());
}
void PropertyProxy_Base::get_property_(Glib::ValueBase& value) const
{
g_object_get_property(obj_->gobj(), property_name_, value.gobj());
}
void PropertyProxy_Base::reset_property_()
{
// Get information about the parameter:
const GParamSpec *const pParamSpec =
g_object_class_find_property(G_OBJECT_GET_CLASS(obj_->gobj()), property_name_);
g_return_if_fail(pParamSpec != nullptr);
Glib::ValueBase value;
value.init(G_PARAM_SPEC_VALUE_TYPE(pParamSpec));
// An explicit reset is not needed, because ValueBase:init()
// has already initialized it to the default value for this type.
// value.reset();
g_object_set_property(obj_->gobj(), property_name_, value.gobj());
}
} // namespace Glib
|
