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CompText.ino
1
19 #include "Nextion.h"
20
21 void t0PopCallback(void *ptr);
22 void b0PopCallback(void *ptr);
23 void b1PopCallback(void *ptr);
24
25 /*
26 * Declare a text object [page id:0,component id:1, component name: "t0"].
27 */
28 NexText t0 = NexText(0, 1, "t0");
29
30 /*
31 * Declare a button object [page id:0,component id:2, component name: "b0"].
32 */
33 NexButton b0 = NexButton(0, 2, "b0");
34
35 /*
36 * Declare a button object [page id:0,component id:3, component name: "b1"].
37 */
38 NexButton b1 = NexButton(0, 3, "b1");
39
40 char buffer[100] = {0};
41
42 /*
43 * Register object t0, b0, b1, to the touch event list.
44 */
45 NexTouch *nex_listen_list[] =
46 {
47 &t0,
48 &b0,
49 &b1,
50 NULL
51 };
52
53 /*
54 * Text component pop callback function.
55 */
56 void t0PopCallback(void *ptr)
57 {
58 dbSerialPrintln("t0PopCallback");
59 t0.setText("50");
60 }
61
62 /*
63 * Button0 component pop callback function.
64 * In this example,the value of the text component will plus one every time when button0 is released.
65 */
66 void b0PopCallback(void *ptr)
67 {
68 uint16_t len;
69 uint16_t number;
70
71 dbSerialPrintln("b0PopCallback");
72
73 memset(buffer, 0, sizeof(buffer));
74 t0.getText(buffer, sizeof(buffer));
75
76 number = atoi(buffer);
77 number += 1;
78
79 memset(buffer, 0, sizeof(buffer));
80 itoa(number, buffer, 10);
81
82 t0.setText(buffer);
83 }
84
85 /*
86 * Button1 component pop callback function.
87 * In this example,the value of the text component will minus one every time when button1 is released.
88 */
89 void b1PopCallback(void *ptr)
90 {
91 uint16_t len;
92 uint16_t number;
93
94 dbSerialPrintln("b1PopCallback");
95
96 memset(buffer, 0, sizeof(buffer));
97 t0.getText(buffer, sizeof(buffer));
98
99 number = atoi(buffer);
100 number -= 1;
101
102 memset(buffer, 0, sizeof(buffer));
103 itoa(number, buffer, 10);
104
105 t0.setText(buffer);
106 }
107
108 void setup(void)
109 {
110 /* Set the baudrate which is for debug and communicate with Nextion screen. */
111 nexInit();
112
113 /* Register the pop event callback function of the current text component. */
114 t0.attachPop(t0PopCallback);
115
116 /* Register the pop event callback function of the current button0 component. */
117 b0.attachPop(b0PopCallback);
118
119 /* Register the pop event callback function of the current button1 component. */
120 b1.attachPop(b1PopCallback);
121
122 dbSerialPrintln("setup done");
123 }
124
125 void loop(void)
126 {
127 /*
128 * When a pop or push event occured every time,
129 * the corresponding component[right page id and component id] in touch event list will be asked.
130 */
131 nexLoop(nex_listen_list);
132 }
133
nexLoop
void nexLoop(NexTouch *nex_listen_list[])
Listen touch event and calling callbacks attached before.
Definition: NexHardware.cpp:235
NexText::setText
bool setText(const char *buffer)
Set text attribute of component.
Definition: NexText.cpp:32
NexTouch::attachPop
void attachPop(NexTouchEventCb pop, void *ptr=NULL)
Attach an callback function of pop touch event.
Definition: NexTouch.cpp:39
nexInit
bool nexInit(void)
Init Nextion.
Definition: NexHardware.cpp:220
NexButton
NexButton component.
Definition: NexButton.h:35
NexText::getText
uint16_t getText(char *buffer, uint16_t len)
Get text attribute of component.
Definition: NexText.cpp:22
Nextion.h
The header file including all other header files provided by this library.
NexTouch
Father class of the components with touch events.
Definition: NexTouch.h:53
NexText
NexText component.
Definition: NexText.h:30