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
|
/**
* @file lv_event.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_event_private.h"
#include "../core/lv_global.h"
#include "../stdlib/lv_mem.h"
#include "lv_assert.h"
#include "lv_types.h"
/*********************
* DEFINES
*********************/
#define event_head LV_GLOBAL_DEFAULT()->event_header
#define event_last_id LV_GLOBAL_DEFAULT()->event_last_register_id
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
#if LV_USE_LOG && LV_LOG_TRACE_EVENT
#define LV_TRACE_EVENT(...) LV_LOG_TRACE(__VA_ARGS__)
#else
#define LV_TRACE_EVENT(...)
#endif
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_event_push(lv_event_t * e)
{
/*Build a simple linked list from the objects used in the events
*It's important to know if this object was deleted by a nested event
*called from this `event_cb`.*/
e->prev = event_head;
event_head = e;
}
void lv_event_pop(lv_event_t * e)
{
event_head = e->prev;
}
lv_result_t lv_event_send(lv_event_list_t * list, lv_event_t * e, bool preprocess)
{
if(list == NULL) return LV_RESULT_OK;
uint32_t i = 0;
lv_event_dsc_t ** dsc = lv_array_front(list);
uint32_t size = lv_array_size(list);
for(i = 0; i < size; i++) {
if(dsc[i]->cb == NULL) continue;
bool is_preprocessed = (dsc[i]->filter & LV_EVENT_PREPROCESS) != 0;
if(is_preprocessed != preprocess) continue;
lv_event_code_t filter = dsc[i]->filter & ~LV_EVENT_PREPROCESS;
if(filter == LV_EVENT_ALL || filter == e->code) {
e->user_data = dsc[i]->user_data;
dsc[i]->cb(e);
if(e->stop_processing) return LV_RESULT_OK;
/*Stop if the object is deleted*/
if(e->deleted) return LV_RESULT_INVALID;
}
}
return LV_RESULT_OK;
}
lv_event_dsc_t * lv_event_add(lv_event_list_t * list, lv_event_cb_t cb, lv_event_code_t filter,
void * user_data)
{
lv_event_dsc_t * dsc = lv_malloc(sizeof(lv_event_dsc_t));
LV_ASSERT_NULL(dsc);
dsc->cb = cb;
dsc->filter = filter;
dsc->user_data = user_data;
if(lv_array_size(list) == 0) {
/*event list hasn't been initialized.*/
lv_array_init(list, 1, sizeof(lv_event_dsc_t *));
}
lv_array_push_back(list, &dsc);
return dsc;
}
bool lv_event_remove_dsc(lv_event_list_t * list, lv_event_dsc_t * dsc)
{
LV_ASSERT_NULL(list);
LV_ASSERT_NULL(dsc);
int size = lv_array_size(list);
lv_event_dsc_t ** events = lv_array_front(list);
for(int i = 0; i < size; i++) {
if(events[i] == dsc) {
lv_free(dsc);
lv_array_remove(list, i);
return true;
}
}
return false;
}
uint32_t lv_event_get_count(lv_event_list_t * list)
{
LV_ASSERT_NULL(list);
return lv_array_size(list);
}
lv_event_dsc_t * lv_event_get_dsc(lv_event_list_t * list, uint32_t index)
{
LV_ASSERT_NULL(list);
lv_event_dsc_t ** dsc;
dsc = lv_array_at(list, index);
return dsc ? *dsc : NULL;
}
lv_event_cb_t lv_event_dsc_get_cb(lv_event_dsc_t * dsc)
{
LV_ASSERT_NULL(dsc);
return dsc->cb;
}
void * lv_event_dsc_get_user_data(lv_event_dsc_t * dsc)
{
LV_ASSERT_NULL(dsc);
return dsc->user_data;
}
bool lv_event_remove(lv_event_list_t * list, uint32_t index)
{
LV_ASSERT_NULL(list);
lv_event_dsc_t * dsc = lv_event_get_dsc(list, index);
lv_free(dsc);
return lv_array_remove(list, index);
}
void lv_event_remove_all(lv_event_list_t * list)
{
LV_ASSERT_NULL(list);
int size = lv_array_size(list);
lv_event_dsc_t ** dsc = lv_array_front(list);
for(int i = 0; i < size; i++) {
lv_free(dsc[i]);
}
lv_array_deinit(list);
}
void * lv_event_get_current_target(lv_event_t * e)
{
return e->current_target;
}
void * lv_event_get_target(lv_event_t * e)
{
return e->original_target;
}
lv_event_code_t lv_event_get_code(lv_event_t * e)
{
return e->code & ~LV_EVENT_PREPROCESS;
}
void * lv_event_get_param(lv_event_t * e)
{
return e->param;
}
void * lv_event_get_user_data(lv_event_t * e)
{
return e->user_data;
}
void lv_event_stop_bubbling(lv_event_t * e)
{
e->stop_bubbling = 1;
}
void lv_event_stop_processing(lv_event_t * e)
{
e->stop_processing = 1;
}
uint32_t lv_event_register_id(void)
{
event_last_id ++;
return event_last_id;
}
void lv_event_mark_deleted(void * target)
{
lv_event_t * e = event_head;
while(e) {
if(e->original_target == target || e->current_target == target) e->deleted = 1;
e = e->prev;
}
}
/**********************
* STATIC FUNCTIONS
**********************/
|
