CompText.ino
#include "Nextion.h"
void t0PopCallback(void *ptr);
void b0PopCallback(void *ptr);
void b1PopCallback(void *ptr);
/*
* Declare a text object [page id:0,component id:1, component name: "t0"].
*/
NexText t0 = NexText(0, 1, "t0");
/*
* Declare a button object [page id:0,component id:2, component name: "b0"].
*/
NexButton b0 = NexButton(0, 2, "b0");
/*
* Declare a button object [page id:0,component id:3, component name: "b1"].
*/
NexButton b1 = NexButton(0, 3, "b1");
char buffer[100] = {0};
/*
* Register object t0, b0, b1, to the touch event list.
*/
NexTouch *nex_listen_list[] =
{
&t0,
&b0,
&b1,
NULL
};
/*
* Text component pop callback function.
*/
void t0PopCallback(void *ptr)
{
dbSerialPrintln("t0PopCallback");
t0.setText("50");
}
/*
* Button0 component pop callback function.
* In this example,the value of the text component will plus one every time when button0 is released.
*/
void b0PopCallback(void *ptr)
{
uint16_t len;
uint16_t number;
dbSerialPrintln("b0PopCallback");
memset(buffer, 0, sizeof(buffer));
t0.getText(buffer, sizeof(buffer));
number = atoi(buffer);
number += 1;
memset(buffer, 0, sizeof(buffer));
itoa(number, buffer, 10);
t0.setText(buffer);
}
/*
* Button1 component pop callback function.
* In this example,the value of the text component will minus one every time when button1 is released.
*/
void b1PopCallback(void *ptr)
{
uint16_t len;
uint16_t number;
dbSerialPrintln("b1PopCallback");
memset(buffer, 0, sizeof(buffer));
t0.getText(buffer, sizeof(buffer));
number = atoi(buffer);
number -= 1;
memset(buffer, 0, sizeof(buffer));
itoa(number, buffer, 10);
t0.setText(buffer);
}
void setup(void)
{
/* Set the baudrate which is for debug and communicate with Nextion screen. */
nexInit();
/* Register the pop event callback function of the current text component. */
t0.attachPop(t0PopCallback);
/* Register the pop event callback function of the current button0 component. */
b0.attachPop(b0PopCallback);
/* Register the pop event callback function of the current button1 component. */
b1.attachPop(b1PopCallback);
dbSerialPrintln("setup done");
}
void loop(void)
{
/*
* When a pop or push event occured every time,
* the corresponding component[right page id and component id] in touch event list will be asked.
*/
nexLoop(nex_listen_list);
}
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