我从 UART 接收到从 Arduino 发送的 2D 数组。我可以在调试中显示它,但我不能将它保存在 QList 变体中以在 QML 中为矩形矩阵设置文本。
我想在 QML 每个矩形上显示文本。
我该怎么办?
这是 Arduino 代码。我发送二维数组 17x17
void setup(){
pinMode(LED_BUILTIN,OUTPUT);
analogWrite(LED_BUILTIN,255);
Serial.begin(115200);
void loop(){
double data[17][17];
if(Serial.available()){
delay(100);
for(int i=0; i<17; i++){
for(int j=0; j<17; j++){
data[i][j] = i+j+0.01;
sendData(data[i][j]);
delay(10);
}
}
}
return;
}
void sendData(double data){
Serial.print((data));
}
这是 readSerial 函数:
void serial::readSerial(){
serialData = arduino.readAll();
qDebug()<< serialData <<"\n";
}
QML 文件:
import QtQuick 2.12
import QtQuick.Window 2.12
Window {
visible: true
width: 17*square_size
height: 17*square_size
title: qsTr("Hello World")
property int square_size: 30
Grid {
id: grid
columns: 17
Repeater{
id: rpt
model: 17*17
Rectangle{
width: square_size
height: square_size
border.color: "black"
border.width: 1
Text {
anchors.centerIn: parent
text: Serial.model_data[index]
}
}
}
}
}
序列号.h:
#include <QQmlApplicationEngine>
#include <QSerialPort>
#include <QSerialPortInfo>
#include <QtDebug>
class serial: public QObject
{
Q_OBJECT
Q_PROPERTY(QList<QString> text READ text NOTIFY textChanged)
public:
explicit serial(QQmlApplicationEngine *engine, QObject *parent = nullptr);
~serial();
void setupSerial();
Q_INVOKABLE QList<QString> text(){
return m_text;
}
private slots:
void readSerial();
private:
QQmlApplicationEngine* m_engine;
/* Varian of Arduino*/
QSerialPort arduino;
bool arduino_is_avaiable;
QString portName;
QByteArray serialData;
/*Varian of text*/
QList<QString> m_text;
signals:
void textChanged();
public slots:
};
#endif // SERIAL_H
主文件
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include "serial.h"
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
serial myserial(&engine);
engine.rootContext()->setContextProperty("Serial", &myserial);
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();
}