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/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
******************************************************************************/
#include "variantbardataproxy.h"
using namespace QtDataVisualization;
VariantBarDataProxy::VariantBarDataProxy() :
QBarDataProxy()
{
}
VariantBarDataProxy::VariantBarDataProxy(VariantDataSet *newSet,
VariantBarDataMapping *mapping) :
QBarDataProxy()
{
setDataSet(newSet);
setMapping(mapping);
}
VariantBarDataProxy::~VariantBarDataProxy()
{
delete m_dataSet;
}
void VariantBarDataProxy::setDataSet(VariantDataSet *newSet)
{
if (!m_dataSet.isNull())
QObject::disconnect(m_dataSet.data(), 0, this, 0);
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(0);
}
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(0);
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
typedef QHash<QString, float> ColumnValueMap;
QHash <QString, ColumnValueMap> itemValueMap;
foreach (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 = new QBarDataArray;
foreach (QString rowKey, rowList) {
QBarDataRow *newProxyRow = new QBarDataRow(columnList.size());
for (int 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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