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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "variantbardataproxy.h"
VariantBarDataProxy::VariantBarDataProxy() = default;
VariantBarDataProxy::~VariantBarDataProxy()
{
delete m_dataSet;
}
void VariantBarDataProxy::setDataSet(VariantDataSet *newSet)
{
if (!m_dataSet.isNull())
QObject::disconnect(m_dataSet.data(), nullptr, this, nullptr);
m_dataSet = newSet;
if (!m_dataSet.isNull()) {
QObject::connect(m_dataSet.data(),
&VariantDataSet::itemsAdded,
this,
&VariantBarDataProxy::handleItemsAdded);
QObject::connect(m_dataSet.data(),
&VariantDataSet::dataCleared,
this,
&VariantBarDataProxy::handleDataCleared);
}
resolveDataSet();
}
VariantDataSet *VariantBarDataProxy::dataSet()
{
return m_dataSet.data();
}
void VariantBarDataProxy::setMapping(VariantBarDataMapping *mapping)
{
if (!m_mapping.isNull()) {
QObject::disconnect(m_mapping.data(),
&VariantBarDataMapping::mappingChanged,
this,
&VariantBarDataProxy::handleMappingChanged);
}
m_mapping = mapping;
if (!m_mapping.isNull()) {
QObject::connect(m_mapping.data(),
&VariantBarDataMapping::mappingChanged,
this,
&VariantBarDataProxy::handleMappingChanged);
}
resolveDataSet();
}
VariantBarDataMapping *VariantBarDataProxy::mapping()
{
return m_mapping.data();
}
void VariantBarDataProxy::handleItemsAdded(int index, int count)
{
Q_UNUSED(index);
Q_UNUSED(count);
// Resolve new items
resolveDataSet();
}
void VariantBarDataProxy::handleDataCleared()
{
// Data cleared, reset array
resetArray();
}
void VariantBarDataProxy::handleMappingChanged()
{
resolveDataSet();
}
// Resolve entire dataset into QBarDataArray.
//! [0]
void VariantBarDataProxy::resolveDataSet()
{
// If we have no data or mapping, or the categories are not defined, simply
// clear the array
if (m_dataSet.isNull() || m_mapping.isNull() || !m_mapping->rowCategories().size()
|| !m_mapping->columnCategories().size()) {
resetArray();
return;
}
const VariantDataItemList &itemList = m_dataSet->itemList();
int rowIndex = m_mapping->rowIndex();
int columnIndex = m_mapping->columnIndex();
int valueIndex = m_mapping->valueIndex();
const QStringList &rowList = m_mapping->rowCategories();
const QStringList &columnList = m_mapping->columnCategories();
// Sort values into rows and columns
using ColumnValueMap = QHash<QString, float>;
QHash<QString, ColumnValueMap> itemValueMap;
for (const VariantDataItem *item : itemList) {
itemValueMap[item->at(rowIndex).toString()][item->at(columnIndex).toString()]
= item->at(valueIndex).toReal();
}
// Create a new data array in format the parent class understands
QBarDataArray newProxyArray;
for (const QString &rowKey : rowList) {
QBarDataRow newProxyRow(columnList.size());
for (qsizetype i = 0; i < columnList.size(); ++i)
newProxyRow[i].setValue(itemValueMap[rowKey][columnList.at(i)]);
newProxyArray.append(newProxyRow);
}
// Finally, reset the data array in the parent class
resetArray(newProxyArray);
}
//! [0]
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