帮我写出以上上位机的代码
时间: 2023-08-28 08:31:23 浏览: 42
好的,以下是一个简单的上位机程序的代码:
mainwindow.h
```c++
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QPainter>
#include <QTimer>
#include <QPointF>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void onStartButtonClicked(); // 开始采集按钮点击事件
void onStopButtonClicked(); // 停止采集按钮点击事件
void onCursorClicked(QPointF pos); // 游标点击事件
void onTimerTimeout(); // 定时器超时事件
private:
Ui::MainWindow *ui;
bool m_isCollecting; // 是否正在采集
QTimer m_timer; // 定时器
QPointF m_cursorPos; // 游标位置
QPointF m_lastCursorPos; // 上一个游标位置
QList<QPointF> m_data; // 采集到的数据
void startCollecting(); // 开始采集
void stopCollecting(); // 停止采集
void drawWaveform(QPainter *painter); // 绘制波形图
void drawCursor(QPainter *painter); // 绘制游标
};
#endif // MAINWINDOW_H
```
mainwindow.cpp
```c++
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
m_isCollecting(false),
m_lastCursorPos(0, 0)
{
ui->setupUi(this);
// 设置绘图区域背景色为白色
QPalette pal = ui->waveformWidget->palette();
pal.setColor(QPalette::Background, Qt::white);
ui->waveformWidget->setPalette(pal);
// 设置游标控件的点击事件
connect(ui->cursorWidget, SIGNAL(clicked(QPointF)), this, SLOT(onCursorClicked(QPointF)));
// 设置定时器,用于定时更新波形图
connect(&m_timer, SIGNAL(timeout()), this, SLOT(onTimerTimeout()));
m_timer.setInterval(50);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::onStartButtonClicked()
{
startCollecting();
}
void MainWindow::onStopButtonClicked()
{
stopCollecting();
}
void MainWindow::onCursorClicked(QPointF pos)
{
m_cursorPos = pos;
update();
}
void MainWindow::onTimerTimeout()
{
ui->waveformWidget->update();
}
void MainWindow::startCollecting()
{
m_isCollecting = true;
// TODO: 设置采集参数,并开始采集
m_timer.start();
}
void MainWindow::stopCollecting()
{
m_isCollecting = false;
// TODO: 停止采集
m_timer.stop();
}
void MainWindow::drawWaveform(QPainter *painter)
{
// 绘制坐标轴
painter->setPen(QPen(Qt::black, 1));
painter->drawLine(ui->waveformWidget->rect().left() + 30, ui->waveformWidget->rect().bottom() - 30,
ui->waveformWidget->rect().right(), ui->waveformWidget->rect().bottom() - 30);
painter->drawLine(ui->waveformWidget->rect().left() + 30, ui->waveformWidget->rect().top(),
ui->waveformWidget->rect().left() + 30, ui->waveformWidget->rect().bottom() - 30);
// 绘制数据点
if (m_data.isEmpty()) {
return;
}
painter->setPen(QPen(Qt::blue, 1));
QPointF lastPoint(ui->waveformWidget->rect().left() + 30, ui->waveformWidget->rect().bottom() - 30 - m_data.first().y());
for (int i = 1; i < m_data.count(); i++) {
QPointF point(ui->waveformWidget->rect().left() + 30 + i, ui->waveformWidget->rect().bottom() - 30 - m_data.at(i).y());
painter->drawLine(lastPoint, point);
lastPoint = point;
}
}
void MainWindow::drawCursor(QPainter *painter)
{
// 绘制游标
if (!m_cursorPos.isNull()) {
painter->setPen(QPen(Qt::red, 1));
painter->drawLine(m_cursorPos.x(), ui->waveformWidget->rect().top(),
m_cursorPos.x(), ui->waveformWidget->rect().bottom() - 30);
painter->drawLine(ui->waveformWidget->rect().left() + 30, m_cursorPos.y(),
ui->waveformWidget->rect().right(), m_cursorPos.y());
}
// 绘制ΔX和ΔY的值
if (!m_cursorPos.isNull() && !m_lastCursorPos.isNull()) {
double dx = m_cursorPos.x() - m_lastCursorPos.x();
double dy = m_cursorPos.y() - m_lastCursorPos.y();
ui->dxLabel->setText(QString("ΔX: %1").arg(dx));
ui->dyLabel->setText(QString("ΔY: %1").arg(dy));
} else {
ui->dxLabel->setText(QString("ΔX: 0"));
ui->dyLabel->setText(QString("ΔY: 0"));
}
}
void MainWindow::paintEvent(QPaintEvent *event)
{
QMainWindow::paintEvent(event);
QPainter painter(ui->waveformWidget);
// 绘制波形图和游标
drawWaveform(&painter);
drawCursor(&painter);
}
```
需要注意的是,这只是一个简单的代码示例,具体的实现需要根据你的实际需求和采集方式进行相应的修改和调整。