Qt 5.7 | Qt Charts | BarModelMapper Example | tablewidget.cpp Example File

Qt 5.7.1 Reference Documentation

# tablewidget.cpp Example File

barmodelmapper/tablewidget.cpp

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      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the Qt Charts module of the Qt Toolkit.
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      #include "tablewidget.h"
      #include <QtWidgets/QGridLayout>
      #include <QtWidgets/QTableView>
      #include <QtCharts/QChart>
      #include <QtCharts/QChartView>
      #include <QtCharts/QLineSeries>
      #include <QtCharts/QVXYModelMapper>
      #include <QtCharts/QBarSeries>
      #include <QtCharts/QBarSet>
      #include <QtCharts/QVBarModelMapper>
      #include <QtWidgets/QHeaderView>
      #include <QtCharts/QBarCategoryAxis>

      QT_CHARTS_USE_NAMESPACE

      TableWidget::TableWidget(QWidget *parent)
          : QWidget(parent)
      {
          // create simple model for storing data
          // user's table data model
          m_model = new CustomTableModel;

          // create table view and add model to it
          QTableView *tableView = new QTableView;
          tableView->setModel(m_model);
          tableView->setMinimumWidth(300);
          tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
          tableView->verticalHeader()->setSectionResizeMode(QHeaderView::Stretch);
          m_model->setParent(tableView);

          QChart *chart = new QChart;
          chart->setAnimationOptions(QChart::AllAnimations);

          // series 1
          QBarSeries *series = new QBarSeries;

          int first = 3;
          int count = 5;
          QVBarModelMapper *mapper = new QVBarModelMapper(this);
          mapper->setFirstBarSetColumn(1);
          mapper->setLastBarSetColumn(4);
          mapper->setFirstRow(first);
          mapper->setRowCount(count);
          mapper->setSeries(series);
          mapper->setModel(m_model);
          chart->addSeries(series);

          // for storing color hex from the series
          QString seriesColorHex = "#000000";

          // get the color of the series and use it for showing the mapped area
          QList<QBarSet *> barsets = series->barSets();
          for (int i = 0; i < barsets.count(); i++) {
              seriesColorHex = "#" + QString::number(barsets.at(i)->brush().color().rgb(), 16).right(6).toUpper();
              m_model->addMapping(seriesColorHex, QRect(1 + i, first, 1, barsets.at(i)->count()));
          }

          QStringList categories;
          categories << "April" << "May" << "June" << "July" << "August";
          QBarCategoryAxis *axis = new QBarCategoryAxis();
          axis->append(categories);
          chart->createDefaultAxes();
          chart->setAxisX(axis, series);

          QChartView *chartView = new QChartView(chart);
          chartView->setRenderHint(QPainter::Antialiasing);
          chartView->setMinimumSize(640, 480);

          // create main layout
          QGridLayout *mainLayout = new QGridLayout;
          mainLayout->addWidget(tableView, 1, 0);
          mainLayout->addWidget(chartView, 1, 1);
          mainLayout->setColumnStretch(1, 1);
          mainLayout->setColumnStretch(0, 0);
          setLayout(mainLayout);
      }