Documentation: examples/CompCrop/CompCrop.ino Source File

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CompCrop.ino
1
18 #include "Nextion.h"
19
20 /*
21 * Declare a crop object [page id:0,component id:1, component name: "q0"].
22 */
23 NexCrop q0 = NexCrop(0, 1, "q0");
24
25 NexTouch *nex_listen_list[] =
26 {
27 &q0,
28 NULL
29 };
30
31 /*
32 * Crop component pop callback function.
33 * In this example,the image of current crop component will be changed every time when it is released.
34 */
35 void q0PopCallback(void *ptr)
36 {
37 uint32_t number = 0;
38 dbSerialPrintln("q0PopCallback");
39
40 q0.getPic(&number);
41
42 number += 1;
43 number %= 2;
44
45 q0.setPic(number);
46 }
47
48 void setup(void)
49 {
50 nexInit();
51 q0.attachPop(q0PopCallback);
52 dbSerialPrintln("setup done");
53 }
54
55 void loop(void)
56 {
57 nexLoop(nex_listen_list);
58 }
59
nexLoop
void nexLoop(NexTouch *nex_listen_list[])
Listen touch event and calling callbacks attached before.
Definition: NexHardware.cpp:235
NexCrop::getPic
bool getPic(uint32_t *number)
Get the number of picture.
Definition: NexCrop.cpp:46
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
Nextion.h
The header file including all other header files provided by this library.
NexCrop::setPic
bool setPic(uint32_t number)
Set the number of picture.
Definition: NexCrop.cpp:55
NexCrop
NexCrop component.
Definition: NexCrop.h:30
NexTouch
Father class of the components with touch events.
Definition: NexTouch.h:53