Documentation
For Arduino users
CompCrop_v0_32.ino
1 
20 #include "Nextion.h"
21 
22 /*
23  * Declare a crop object [page id:0,component id:1, component name: "q0"].
24  */
25 NexCrop q0 = NexCrop(0, 1, "q0");
26 
27 NexTouch *nex_listen_list[] =
28 {
29  &q0,
30  NULL
31 };
32 
33 /*
34  * Crop component pop callback function.
35  * In this example,the image of current crop component will be changed every time when it is released.
36  */
37 void q0PopCallback(void *ptr)
38 {
39  uint32_t number = 0;
40  dbSerialPrintln("q0PopCallback");
41 
42  q0.getPic(&number);
43 
44  number += 1;
45  number %= 2;
46 
47  q0.setPic(number);
48 }
49 
50 void setup(void)
51 {
52  nexInit();
53  q0.attachPop(q0PopCallback);
54  dbSerialPrintln("setup done");
55 }
56 
57 void loop(void)
58 {
59  nexLoop(nex_listen_list);
60 }
61 
void nexLoop(NexTouch *nex_listen_list[])
Listen touch event and calling callbacks attached before.
bool getPic(uint32_t *number)
Get the number of picture.
Definition: NexCrop.cpp:46
void attachPop(NexTouchEventCb pop, void *ptr=NULL)
Attach an callback function of pop touch event.
Definition: NexTouch.cpp:39
bool nexInit(void)
Init Nextion.
The header file including all other header files provided by this library.
bool setPic(uint32_t number)
Set the number of picture.
Definition: NexCrop.cpp:55
NexCrop component.
Definition: NexCrop.h:30
Father class of the components with touch events.
Definition: NexTouch.h:53