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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 "surfaceitemmodelhandler_p.h"
#include "qitemmodelsurfacedatamapping_p.h"
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
SurfaceItemModelHandler::SurfaceItemModelHandler(QItemModelSurfaceDataProxy *proxy, QObject *parent)
: AbstractItemModelHandler(parent),
m_proxy(proxy)
{
}
SurfaceItemModelHandler::~SurfaceItemModelHandler()
{
}
// Resolve entire item model into QSurfaceDataArray.
void SurfaceItemModelHandler::resolveModel()
{
QItemModelSurfaceDataMapping *mapping = static_cast<QItemModelSurfaceDataMapping *>(m_activeMapping);
if (m_itemModel.isNull() || !mapping) {
m_proxy->resetArray(0);
return;
}
if (!mapping->useModelCategories()
&& (mapping->rowRole().isEmpty() || mapping->columnRole().isEmpty())) {
m_proxy->resetArray(0);
return;
}
QSurfaceDataArray *newProxyArray = new QSurfaceDataArray;
QHash<int, QByteArray> roleHash = m_itemModel->roleNames();
// Default to display role if no mapping
int valueRole = roleHash.key(mapping->valueRole().toLatin1(), Qt::DisplayRole);
int rowCount = m_itemModel->rowCount();
int columnCount = m_itemModel->columnCount();
if (mapping->useModelCategories()) {
for (int i = 0; i < rowCount; i++) {
QSurfaceDataRow *newProxyRow = new QSurfaceDataRow(columnCount);
for (int j = 0; j < columnCount; j++)
(*newProxyRow)[j] = m_itemModel->index(i, j).data(valueRole).toReal();
newProxyArray->append(newProxyRow);
}
} else {
int rowRole = roleHash.key(mapping->rowRole().toLatin1());
int columnRole = roleHash.key(mapping->columnRole().toLatin1());
bool generateRows = mapping->autoRowCategories();
bool generateColumns = mapping->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, qreal> 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)
mapping->dptr()->m_rowCategories = rowList;
else
rowList = mapping->rowCategories();
if (generateColumns)
mapping->dptr()->m_columnCategories = columnList;
else
columnList = mapping->columnCategories();
// Create new data array from itemValueMap
foreach (QString rowKey, rowList) {
QSurfaceDataRow *newProxyRow = new QSurfaceDataRow(columnList.size());
for (int i = 0; i < columnList.size(); i++)
(*newProxyRow)[i] = itemValueMap[rowKey][columnList.at(i)];
newProxyArray->append(newProxyRow);
}
}
m_proxy->resetArray(newProxyArray);
}
QT_DATAVISUALIZATION_END_NAMESPACE
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