Qt使用QCustomPlot的實現(xiàn)示例

更新時間：2024年01月02日 09:46:29 作者：怎么追摩羯座

QCustomPlot是一個基于Qt C++的圖形庫,用于繪制和數(shù)據(jù)可視化,并為實時可視化應用程序提供高性能服務,本文主要介紹了Qt使用QCustomPlot的實現(xiàn)示例,感興趣的可以了解一下

一、下載文件

進入官網(wǎng)，選擇“Download”、QCustomPlot.tar.gz

Qt Plotting Widget QCustomPlot - Download

二、創(chuàng)建項目

創(chuàng)建一個"Qt Widget Application"項目，基類選擇“QMainWindow”，把剛才下載的壓縮包里的“qcustomplot.h”和“qcustomplot.cpp”拷貝到項目目錄下

右擊項目名稱，添加現(xiàn)有文件，選擇“qcustomplot.h”和“qcustomplot.cpp”

雙擊“mainwindow.ui”，往界面上拖拽一個Widget，并進行柵格布局

右擊“Widget”，選擇“提升為”

填寫類名稱“QCustomPlot”，點擊“添加”

點擊“提升”

Widget的基類被更改

三、修改代碼

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代碼入下

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qcustomplot.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    //可移動縮放
    ui->widget->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom );
    //設(shè)置背景顏色
    ui->widget->setBackground(QColor(25,35,45));
    //軸刻度文字
    ui->widget->xAxis->setTickLabelColor(Qt::white);
    ui->widget->yAxis->setTickLabelColor(Qt::white);
    //設(shè)定右上角圖形標注可見
    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));
    //設(shè)置X軸坐標范圍
    ui->widget->xAxis->setRange(-10, 100);
    //設(shè)置Y軸坐標范圍
    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)));
    //傳入數(shù)據(jù) QVector<double>類型
    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;
}