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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
#include "baritemmodelhandler_p.h"
namespace QtDataVisualization {
/*!
* \class QtDataVisualization::BarItemModelHandler
* \internal
*/
BarItemModelHandler::BarItemModelHandler(QItemModelBarDataProxy *proxy, QObject *parent)
: AbstractItemModelHandler(parent),
m_proxy(proxy),
m_proxyArray(0),
m_columnCount(0)
{
}
BarItemModelHandler::~BarItemModelHandler()
{
}
// Resolve entire item model into QBarDataArray.
void BarItemModelHandler::resolveModel()
{
if (m_itemModel.isNull()) {
m_proxy->resetArray(0);
return;
}
if (!m_proxy->useModelCategories()
&& (m_proxy->rowRole().isEmpty() || m_proxy->columnRole().isEmpty())) {
m_proxy->resetArray(0);
return;
}
QStringList rowLabels;
QStringList columnLabels;
QHash<int, QByteArray> roleHash = m_itemModel->roleNames();
// Default to display role if no mapping
int valueRole = roleHash.key(m_proxy->valueRole().toLatin1(), Qt::DisplayRole);
int rowCount = m_itemModel->rowCount();
int columnCount = m_itemModel->columnCount();
if (m_proxy->useModelCategories()) {
// If dimensions have changed, recreate the array
if (m_proxyArray != m_proxy->array() || columnCount != m_columnCount
|| rowCount != m_proxyArray->size()) {
m_proxyArray = new QBarDataArray;
m_proxyArray->reserve(rowCount);
for (int i = 0; i < rowCount; i++)
m_proxyArray->append(new QBarDataRow(columnCount));
}
for (int i = 0; i < rowCount; i++) {
QBarDataRow &newProxyRow = *m_proxyArray->at(i);
for (int j = 0; j < columnCount; j++)
newProxyRow[j].setValue(m_itemModel->index(i, j).data(valueRole).toReal());
}
// Generate labels from headers if using model rows/columns
for (int i = 0; i < rowCount; i++)
rowLabels << m_itemModel->headerData(i, Qt::Vertical).toString();
for (int i = 0; i < columnCount; i++)
columnLabels << m_itemModel->headerData(i, Qt::Horizontal).toString();
m_columnCount = columnCount;
} else {
int rowRole = roleHash.key(m_proxy->rowRole().toLatin1());
int columnRole = roleHash.key(m_proxy->columnRole().toLatin1());
bool generateRows = m_proxy->autoRowCategories();
bool generateColumns = m_proxy->autoColumnCategories();
QStringList rowList;
QStringList columnList;
// For detecting duplicates in categories generation, using QHashes should be faster than
// simple QStringList::contains() check.
QHash<QString, bool> rowListHash;
QHash<QString, bool> columnListHash;
// Sort values into rows and columns
typedef QHash<QString, float> ColumnValueMap;
QHash <QString, ColumnValueMap> itemValueMap;
for (int i = 0; i < rowCount; i++) {
for (int j = 0; j < columnCount; j++) {
QModelIndex index = m_itemModel->index(i, j);
QString rowRoleStr = index.data(rowRole).toString();
QString columnRoleStr = index.data(columnRole).toString();
itemValueMap[rowRoleStr][columnRoleStr] = index.data(valueRole).toReal();
if (generateRows && !rowListHash.value(rowRoleStr, false)) {
rowListHash.insert(rowRoleStr, true);
rowList << rowRoleStr;
}
if (generateColumns && !columnListHash.value(columnRoleStr, false)) {
columnListHash.insert(columnRoleStr, true);
columnList << columnRoleStr;
}
}
}
if (generateRows)
m_proxy->dptr()->m_rowCategories = rowList;
else
rowList = m_proxy->rowCategories();
if (generateColumns)
m_proxy->dptr()->m_columnCategories = columnList;
else
columnList = m_proxy->columnCategories();
// If dimensions have changed, recreate the array
if (m_proxyArray != m_proxy->array() || columnList.size() != m_columnCount
|| rowList.size() != m_proxyArray->size()) {
m_proxyArray = new QBarDataArray;
m_proxyArray->reserve(rowList.size());
for (int i = 0; i < rowList.size(); i++)
m_proxyArray->append(new QBarDataRow(columnList.size()));
}
// Create new data array from itemValueMap
for (int i = 0; i < rowList.size(); i++) {
QString rowKey = rowList.at(i);
QBarDataRow &newProxyRow = *m_proxyArray->at(i);
for (int j = 0; j < columnList.size(); j++)
newProxyRow[j].setValue(itemValueMap[rowKey][columnList.at(j)]);
}
rowLabels = rowList;
columnLabels = columnList;
m_columnCount = columnList.size();
}
m_proxy->resetArray(m_proxyArray, rowLabels, columnLabels);
}
}
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