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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* File : rtgui_object.c
* This file is part of RT-Thread GUI Engine
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2009-10-04 Bernard first version
*/
#include <rtgui/rtgui_object.h>
#include <rtgui/rtgui_system.h>
static void _rtgui_object_constructor(rtgui_object_t *object)
{
if (!object)
return;
object->flag = RTGUI_OBJECT_FLAG_VALID;
object->id = (rt_uint32_t)object;
}
/* Destroys the object */
static void _rtgui_object_destructor(rtgui_object_t *object)
{
/* Any valid objest should both have valid flag _and_ valid type. Only use
* flag is not enough because the chunk of memory may be reallocted to other
* object and thus the flag will become valid. */
object->flag = RTGUI_OBJECT_FLAG_NONE;
object->type = RT_NULL;
}
DEFINE_CLASS_TYPE(object, "object",
RT_NULL,
_rtgui_object_constructor,
_rtgui_object_destructor,
sizeof(struct rtgui_object));
RTM_EXPORT(_rtgui_object);
void rtgui_type_object_construct(const rtgui_type_t *type, rtgui_object_t *object)
{
/* construct from parent to children */
if (type->parent != RT_NULL)
rtgui_type_object_construct(type->parent, object);
if (type->constructor)
type->constructor(object);
}
void rtgui_type_destructors_call(const rtgui_type_t *type, rtgui_object_t *object)
{
/* destruct from children to parent */
if (type->destructor)
type->destructor(object);
if (type->parent)
rtgui_type_destructors_call(type->parent, object);
}
rt_bool_t rtgui_type_inherits_from(const rtgui_type_t *type, const rtgui_type_t *parent)
{
const rtgui_type_t *t;
t = type;
while (t)
{
if (t == parent) return RT_TRUE;
t = t->parent;
}
return RT_FALSE;
}
const rtgui_type_t *rtgui_type_parent_type_get(const rtgui_type_t *type)
{
return type->parent;
}
const char *rtgui_type_name_get(const rtgui_type_t *type)
{
if (!type) return RT_NULL;
return type->name;
}
#ifdef RTGUI_OBJECT_TRACE
struct rtgui_object_information
{
rt_uint32_t objs_number;
rt_uint32_t allocated_size;
rt_uint32_t max_allocated;
};
struct rtgui_object_information obj_info = {0, 0, 0};
#endif
/**
* @brief Creates a new object: it calls the corresponding constructors
* (from the constructor of the base class to the constructor of the more
* derived class) and then sets the values of the given properties
*
* @param object_type the type of object to create
* @return the created object
*/
rtgui_object_t *rtgui_object_create(const rtgui_type_t *object_type)
{
rtgui_object_t *new_object;
if (!object_type)
return RT_NULL;
new_object = rtgui_malloc(object_type->size);
if (new_object == RT_NULL) return RT_NULL;
#ifdef RTGUI_OBJECT_TRACE
obj_info.objs_number ++;
obj_info.allocated_size += object_type->size;
if (obj_info.allocated_size > obj_info.max_allocated)
obj_info.max_allocated = obj_info.allocated_size;
#endif
new_object->type = object_type;
rtgui_type_object_construct(object_type, new_object);
return new_object;
}
RTM_EXPORT(rtgui_object_create);
/**
* @brief Destroys the object.
*
* The object destructors will be called in inherited type order.
*
* @param object the object to destroy
*/
void rtgui_object_destroy(rtgui_object_t *object)
{
if (!object || object->flag & RTGUI_OBJECT_FLAG_STATIC)
return;
#ifdef RTGUI_OBJECT_TRACE
obj_info.objs_number --;
obj_info.allocated_size -= object->type->size;
#endif
/* call destructor */
RT_ASSERT(object->type != RT_NULL);
rtgui_type_destructors_call(object->type, object);
/* release object */
rtgui_free(object);
}
RTM_EXPORT(rtgui_object_destroy);
/**
* @brief Checks if the object can be cast to the specified type.
*
* If the object doesn't inherit from the specified type, a warning
* is displayed in the console but the object is returned anyway.
*
* @param object the object to cast
* @param type the type to which we cast the object
* @return Returns the object
*/
rtgui_object_t *rtgui_object_check_cast(rtgui_object_t *obj, const rtgui_type_t *obj_type, const char *func, int line)
{
if (!obj) return RT_NULL;
if (!rtgui_type_inherits_from(obj->type, obj_type))
{
rt_kprintf("%s[%d]: Invalid cast from \"%s\" to \"%s\"\n", func, line,
rtgui_type_name_get(obj->type), rtgui_type_name_get(obj_type));
}
return obj;
}
RTM_EXPORT(rtgui_object_check_cast);
/**
* @brief Gets the type of the object
*
* @param object an object
* @return the type of the object (RT_NULL on failure)
*/
const rtgui_type_t *rtgui_object_object_type_get(rtgui_object_t *object)
{
if (!object) return RT_NULL;
return object->type;
}
RTM_EXPORT(rtgui_object_object_type_get);
void rtgui_object_set_event_handler(struct rtgui_object *object, rtgui_event_handler_ptr handler)
{
RT_ASSERT(object != RT_NULL);
object->event_handler = handler;
}
RTM_EXPORT(rtgui_object_set_event_handler);
rt_bool_t rtgui_object_event_handler(struct rtgui_object *object, struct rtgui_event *event)
{
return RT_FALSE;
}
RTM_EXPORT(rtgui_object_event_handler);
void rtgui_object_set_id(struct rtgui_object *object, rt_uint32_t id)
{
#ifdef RTGUI_USING_ID_CHECK
struct rtgui_object *obj = rtgui_get_self_object(id);
RT_ASSERT(!obj);
#endif
object->id = id;
}
RTM_EXPORT(rtgui_object_set_id);
rt_uint32_t rtgui_object_get_id(struct rtgui_object *object)
{
return object->id;
}
RTM_EXPORT(rtgui_object_get_id);
|
