QT 数据库的增加操作和画图 Win

第一步、先配置CMakeLists.txt

在CMakeLists.txt中添加

find_package(Qt6 REQUIRED COMPONENTS Sql)
find_package(Qt6 REQUIRED COMPONENTS Charts)target_link_libraries(${PROJECT_NAME} PRIVATE Qt6::Sql)
target_link_libraries(${PROJECT_NAME} PRIVATE Qt6::Charts)

避免在包含Qsql库中出现不存在的情况。

第二步、在资源文件中添加.DB文件

先创建resource file。

创建了一个命名为data.qrc的文件，并在cmake中添加该文件。

添加.db文件。

第二步、打开数据库，创建表头，增删改查

//打开数据库
//获得一个基于SQLite的数据库连接对象db = QSqlDatabase::addDatabase("QSQLITE");//设置数据库文件的名称db.setDatabaseName("./raic.db");    // 数据库文件为raic.db
if (!db.open())
{qDebug() << "默认数据库打开失败" << db.lastError();
}

//创建表头
void Composition::createTable()
{QString sql="CREATE TABLE composition(id INTERGER PERIMARY KEY,material TEXT,yvalue INTERGER,createtimestamp TEXT,createtime DATETIME)";//数据库操作类QSqlQuery sq;if(sq.exec(sql)){qDebug()<<"建表成功!";}else{qDebug()<<sq.lastError().text();//上一次操作的错误信息}
}

//增加数据
void MainWindow::on_insertBtn_clicked()
{int  materialID = ui->lineEdit->text().toInt();QString material = ui->lineEdit_2->text();int  yvalue = ui->lineEdit_3->text().toInt();QDateTime time = QDateTime::currentDateTime();QString timestr = time.toString("yyyy-MM-dd hh::mm::ss");qint64 timeT = time.toMSecsSinceEpoch();qDebug()<<timeT;ui->lineEdit_4->setText(QString::number(timeT));ui->lineEdit_5->setText(timestr);Composition com;com.materialID = materialID;com.material = material;com.yvalue = yvalue;com.createtimestamp = timeT;com.createtime = timestr;Composition::insertCompositionToDatabase1(com);
}

第四步、根据数据库的数据画图

//画分布图
QDateTimeEdit//起始时间框
QChartview//画布//皮带上物料的分布
void MainWindow::on_beltclassify_clicked()
{QList<int> beltMaterialList;// 判断时间int64 beginT = ui->startdateTimeEdit->dateTime().toMSecsSinceEpoch();int64 endT = ui->enddateTimeEdit->dateTime().toMSecsSinceEpoch();if (beginT >= endT){QMessageBox::information(this, "起止时间", "开始时间必须小于结束时间");return;}Composition::getPeriodYvalueInfoFromDatabase(&beltMaterialList, beginT, endT);if (beltMaterialList.count() == 0){qDebug() << "当前条件下无皮带上物料分布数据";QMessageBox::information(this, "物料分布", "当前条件下无皮带上物料分布数据");return;}// 绘制皮带上物料分布柱状图beltMaterialBarChart(&beltMaterialList);
}void Composition::getPeriodYvalueInfoFromDatabase(QList<int> *list, qint64 beginStamp, qint64 endStamp)
{// 根据时间范围查询所有物料的y值QSqlQuery query;QString sqlstr;sqlstr = QString("SELECT yvalue FROM composition WHERE createtimestamp >= %1 AND createtimestamp <= %2").arg(beginStamp).arg(endStamp);//    qDebug() << "物料成分查询记录sql: " << sqlstr;query.exec(sqlstr);while (query.next()){QSqlRecord record = query.record();int y = record.value("yvalue").toInt();list->append(y); // 将获取到的物料成分信息追加到链表中}
}void MainWindow::beltMaterialBarChart(QList<int> *list)
{if (list->count() < 1){qDebug() << "valveBarChart：无数据";return;}// 整理数据int data[5] = {0};QList<QString> axisXLabels;//    axisXLabels << "0-200"<< "200-400"<< "400-600"<< "600-800"<< "800-1000";  //5axisXLabels << "1"<< "2"<< "3"<< "4"<< "5";  // 5foreach(int y, *list){if (y >1000){y = 1000;}if (y < 0){y = 0;}data[y/200]++;  // 向下取整  配合从0开始的索引 正好}QChart *chart = new QChart();QBarSet *set = new QBarSet("数量");   // 创建条线数据QBarCategoryAxis *axisX = new QBarCategoryAxis; // 创建X轴axisX->append(axisXLabels);int max = 0;for(int i = 0; i<5;i++){*set << data[i];if (data[i] > max)max = data[i];}// 设置X轴字体大小QFont font;font.setPointSize(12);axisX->setLabelsFont(font);set->setLabelFont(font);  // 调整柱子上数字的大小set->setLabelColor(Qt::black); // 用了主题 颜色被覆盖了QBarSeries *series = new QBarSeries();series->append(set);series->setVisible(true);series->setLabelsPosition(QAbstractBarSeries::LabelsOutsideEnd);  //设置标签显示的位置series->setLabelsVisible(true);  //设置数据标签可见chart->addSeries(series);   // 添加系列到QChart上// 创建Y轴QValueAxis *axisY = new QValueAxis;axisY->setRange(0, ceil(max * 0.1 * 1.1) * 10);axisY->setLabelFormat("%d");// 设置Y轴字体大小axisY->setLabelsFont(font);axisY->setVisible(false);chart->addAxis ( axisX, Qt::AlignBottom );chart->addAxis ( axisY, Qt::AlignLeft );series->attachAxis ( axisX );series->attachAxis ( axisY );//修改图例chart->legend()->hide();chart->setTitle("皮带物料分布");// 设置表格主题
//    chart->setTheme(QChart::ChartThemeBlueCerulean);chart->setTheme(QChart::ChartThemeDark);chart->setAnimationOptions(QChart::AllAnimations);   //动画效果ui->beltView->setChart(chart);ui->beltView->setRenderHint(QPainter::Antialiasing);
}

void MainWindow::on_materialclassify_clicked()
{int64 beginT = ui->startdateTimeEdit->dateTime().toMSecsSinceEpoch();int64 endT = ui->enddateTimeEdit->dateTime().toMSecsSinceEpoch();if (beginT >= endT){QMessageBox::information(this, "起止时间", "开始时间必须小于结束时间");return;}QList<int> MaterialList;Composition::getmaterialInfoFromDatabase(&MaterialList, beginT, endT);if (MaterialList.count() == 0){qDebug() << "当前条件下无皮带上物料分布数据";QMessageBox::information(this, "物料分布", "当前条件下无皮带上物料分布数据");return;}setpieChart(&MaterialList);}void MainWindow::setpieChart(QList<int> *list)
{if (list->count() < 1){qDebug() << "valveBarChart：无数据";return;}double blackNum = 0, AggreNum = 0;foreach(int y, *list){if (y ==0){blackNum++  ;}if (y== 1){AggreNum++;}}double total = blackNum+AggreNum;
//    qDebug()<<"混凝土"<<AggreNum;
//    qDebug()<<"红砖"<<blackNum;
//    qDebug()<<"总计"<<total;double Blackpart =qCeil( blackNum/total*100);double Aggrepart = qFloor(AggreNum/total*100);
//    qDebug()<<"红砖占比"<<Blackpart;
//    qDebug()<<"混凝土占比"<<Aggrepart;m_mySeries = new QPieSeries();m_mySeries->append("红砖",Blackpart);m_mySeries->append("混凝土",Aggrepart);QPieSlice *myRed = m_mySeries->slices().at(0);QPieSlice *myGreen = m_mySeries->slices().at(1);myRed->setColor(QColor(255,0,0,255));myRed->setLabelVisible();myGreen->setColor(QColor(0,255,0,255));myGreen->setLabelVisible();QChart *myChart = new QChart;myChart->addSeries(m_mySeries);QFont font;font.setPointSize(8);myChart->setTitle("混凝土和红砖分布");myChart->setTitleFont(font);myChart->legend()->hide();                      //隐藏图例
//    myChart->setTheme(QChart::ChartThemeBlueNcs);   //设置主题myChart->setTheme(QChart::ChartThemeDark);myChart->setAnimationOptions(QChart::AllAnimations);   //动画效果ui->materialView->setChart(myChart);ui->materialView->setRenderHint(QPainter::Antialiasing);}

最终图示：