1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
// -*- 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 Library General Public
* License as published by the Free Software Foundation; either
* version 2 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., 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 is a connection node for use with SignalProxyProperty.
* It's like ProxyConnectionNode, but it contains the property name too.
*/
class PropertyProxyConnectionNode : public SignalProxyConnectionNode
{
public:
friend class SignalProxyProperty;
PropertyProxyConnectionNode(const sigc::slot_base& slot, GObject* gobject, const gchar* property_name);
protected:
//This will be examined in the callback.
//Should be a static string literal.
const gchar* property_name_;
};
PropertyProxyConnectionNode::PropertyProxyConnectionNode(const sigc::slot_base& slot, GObject* gobject, const gchar* property_name)
: SignalProxyConnectionNode(slot, gobject),
property_name_(property_name)
{
}
//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
PropertyProxyConnectionNode* pConnectionNode = new PropertyProxyConnectionNode(sl, obj_->gobj(), property_name_ );
// 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.
pConnectionNode->connection_id_ = g_signal_connect_data(obj_->gobj(),
"notify", (GCallback)(&callback), pConnectionNode,
&PropertyProxyConnectionNode::destroy_notify_handler,
G_CONNECT_AFTER);
return sigc::connection(pConnectionNode->slot_);
}
void SignalProxyProperty::callback(GObject*, GParamSpec* pspec, gpointer data) //static
{
if(pspec && data)
{
//Get the name of the property that has changed:
const char* property_name_changed = pspec->name;
//Get the name of the property that we are waiting for:
PropertyProxyConnectionNode* conn = static_cast<PropertyProxyConnectionNode*>(data);
const char* property_name_monitored = conn->property_name_;
//If it's the correct property, then call the signal handler:
if(strcmp(property_name_changed, property_name_monitored) == 0)
{
if(sigc::slot_base *const slot = data_to_slot(data))
(*static_cast<sigc::slot<void>*>(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 != 0);
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
|
