customtablemodel.cpp Example File | Qt Charts 5.9

Qt 5.9 | Qt Charts | BarModelMapper Example | customtablemodel.cpp Example File

Qt 5.9.9 Reference Documentation

# customtablemodel.cpp Example File

barmodelmapper/customtablemodel.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Charts module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** GNU General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU
      ** General Public License version 3 or (at your option) any later version
      ** approved by the KDE Free Qt Foundation. The licenses are as published by
      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
      ** included in the packaging of this file. Please review the following
      ** information to ensure the GNU General Public License requirements will
      ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include "customtablemodel.h"
      #include <QtCore/QVector>
      #include <QtCore/QTime>
      #include <QtCore/QRect>
      #include <QtGui/QColor>

      CustomTableModel::CustomTableModel(QObject *parent) :
          QAbstractTableModel(parent)
      {
          qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));

          m_columnCount = 6;
          m_rowCount = 12;

          // m_data
          for (int i = 0; i < m_rowCount; i++) {
              QVector<qreal>* dataVec = new QVector<qreal>(m_columnCount);
              for (int k = 0; k < dataVec->size(); k++) {
                  if (k % 2 == 0)
                      dataVec->replace(k, i * 50 + qrand() % 20);
                  else
                      dataVec->replace(k, qrand() % 100);
              }
              m_data.append(dataVec);
          }
      }

      CustomTableModel::~CustomTableModel()
      {
          qDeleteAll(m_data);
      }

      int CustomTableModel::rowCount(const QModelIndex &parent) const
      {
          Q_UNUSED(parent)
          return m_data.count();
      }

      int CustomTableModel::columnCount(const QModelIndex &parent) const
      {
          Q_UNUSED(parent)
          return m_columnCount;
      }

      QVariant CustomTableModel::headerData(int section, Qt::Orientation orientation, int role) const
      {
          if (role != Qt::DisplayRole)
              return QVariant();

          if (orientation == Qt::Horizontal)
              return QString("201%1").arg(section);
          else
              return QString("%1").arg(section + 1);
      }

      QVariant CustomTableModel::data(const QModelIndex &index, int role) const
      {
          if (role == Qt::DisplayRole) {
              return m_data[index.row()]->at(index.column());
          } else if (role == Qt::EditRole) {
              return m_data[index.row()]->at(index.column());
          } else if (role == Qt::BackgroundRole) {
              for (const QRect &rect : m_mapping) {
                  if (rect.contains(index.column(), index.row()))
                      return QColor(m_mapping.key(rect));
              }

              // cell not mapped return white color
              return QColor(Qt::white);
          }
          return QVariant();
      }

      bool CustomTableModel::setData(const QModelIndex &index, const QVariant &value, int role)
      {
          if (index.isValid() && role == Qt::EditRole) {
              m_data[index.row()]->replace(index.column(), value.toDouble());
              emit dataChanged(index, index);
              return true;
          }
          return false;
      }

      Qt::ItemFlags CustomTableModel::flags(const QModelIndex &index) const
      {
          return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
      }

      void CustomTableModel::addMapping(QString color, QRect area)
      {
          m_mapping.insertMulti(color, area);
      }