customtablemodel.cpp Example File | Qt Charts 5.12.12

- Qt 5.12
- Qt Charts
- Model Data Example
- customtablemodel.cpp Example File
- Qt Charts | Commercial or GPLv3

# customtablemodel.cpp Example File

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

     CustomTableModel::CustomTableModel(QObject *parent) :
         QAbstractTableModel(parent)
     {
         m_columnCount = 4;
         m_rowCount = 15;

         // 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 + QRandomGenerator::global()->bounded(20));
                 else
                     dataVec->replace(k, QRandomGenerator::global()->bounded(100));
             }
             m_data.append(dataVec);
         }
     }

     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) {
             if (section % 2 == 0)
                 return "x";
             else
                 return "y";
         } 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);
     }