C 语言

关注公众号 jb51net

关闭
首页 > 软件编程 > C 语言 > Qt QCustomPlot

Qt使用QCustomPlot的实现示例

作者：怎么追摩羯座

QCustomPlot是一个基于Qt C++的图形库,用于绘制和数据可视化,并为实时可视化应用程序提供高性能服务,本文主要介绍了Qt使用QCustomPlot的实现示例,感兴趣的可以了解一下

一、下载文件

进入官网，选择“Download”、QCustomPlot.tar.gz

Qt Plotting Widget QCustomPlot - Download

二、创建项目

创建一个"Qt Widget Application"项目，基类选择“QMainWindow”，把刚才下载的压缩包里的“qcustomplot.h”和“qcustomplot.cpp”拷贝到项目目录下

右击项目名称，添加现有文件，选择“qcustomplot.h”和“qcustomplot.cpp”

双击“mainwindow.ui”，往界面上拖拽一个Widget，并进行栅格布局

右击“Widget”，选择“提升为”

填写类名称“QCustomPlot”，点击“添加”

点击“提升”

Widget的基类被更改

三、修改代码

在.pro文件中添加：QT += printsupport

#-------------------------------------------------
#
# Project created by QtCreator 2023-10-04T14:16:44
#
#-------------------------------------------------
 
QT += core gui
QT += printsupport
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
TARGET = MyCustomPlot
TEMPLATE = app
 
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
 
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
 
CONFIG += c++11
 
SOURCES += \
main.cpp \
mainwindow.cpp \
qcustomplot.cpp
 
HEADERS += \
mainwindow.h \
qcustomplot.h
 
FORMS += \
mainwindow.ui
 
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

更改mainwindow.cpp代码入下 

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qcustomplot.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    //可移动缩放
    ui->widget->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom );
    //设置背景颜色
    ui->widget->setBackground(QColor(25,35,45));
    //轴刻度文字
    ui->widget->xAxis->setTickLabelColor(Qt::white);
    ui->widget->yAxis->setTickLabelColor(Qt::white);
    //设定右上角图形标注可见
    ui->widget->legend->setVisible(true);
    ui->widget->legend->setBrush(QColor(25,35,45));
    ui->widget->legend->setTextColor(Qt::white);
    ui->widget->legend->setFont(QFont("Helvetica", 9));
    //设置X轴坐标范围
    ui->widget->xAxis->setRange(-10, 100);
    //设置Y轴坐标范围
    ui->widget->yAxis->setRange(-150, 150);
    ui->widget->addGraph();
    ui->widget->graph(0)->setName("通道1");
    ui->widget->graph(0)->setPen(QPen(QColor(178,34,34)));
    //传入数据 QVector<double>类型
    QVector<double> xData;
    QVector<double> yData;
    for(int i = 0; i < 100; i++)
    {
        xData.append(i);
        yData.append(150 * sin(i));
    }
    ui->widget->graph(0)->setData(xData, yData);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}

四、运行测试

运行程序，界面显示如下

到此这篇关于Qt使用QCustomPlot的实现示例的文章就介绍到这了,更多相关Qt使用QCustomPlot内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！ 

阅读全文