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/****************************************************************************
**
** Copyright (C) 2014 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 "scatteritemmodelhandler_p.h"
#include <QTimer>
QT_BEGIN_NAMESPACE_DATAVISUALIZATION
static const int noRoleIndex = -1;
ScatterItemModelHandler::ScatterItemModelHandler(QItemModelScatterDataProxy *proxy, QObject *parent)
: AbstractItemModelHandler(parent),
m_proxy(proxy),
m_proxyArray(0)
{
}
ScatterItemModelHandler::~ScatterItemModelHandler()
{
}
void ScatterItemModelHandler::handleDataChanged(const QModelIndex &topLeft,
const QModelIndex &bottomRight,
const QVector<int> &roles)
{
// Do nothing if full reset already pending
if (!m_fullReset) {
if (m_itemModel->columnCount() > 1) {
// If the data model is multi-column, do full asynchronous reset to simplify things
AbstractItemModelHandler::handleDataChanged(topLeft, bottomRight, roles);
} else {
int start = qMin(topLeft.row(), bottomRight.row());
int end = qMax(topLeft.row(), bottomRight.row());
QScatterDataArray array(end - start + 1);
int count = 0;
for (int i = start; i <= end; i++)
modelPosToScatterItem(i, 0, array[count++]);
m_proxy->setItems(start, array);
}
}
}
void ScatterItemModelHandler::handleRowsInserted(const QModelIndex &parent, int start, int end)
{
// Do nothing if full reset already pending
if (!m_fullReset) {
if (!m_proxy->itemCount() || m_itemModel->columnCount() > 1) {
// If inserting into an empty array, do full asynchronous reset to avoid multiple
// separate inserts when initializing the model.
// If the data model is multi-column, do full asynchronous reset to simplify things
AbstractItemModelHandler::handleRowsInserted(parent, start, end);
} else {
QScatterDataArray array(end - start + 1);
int count = 0;
for (int i = start; i <= end; i++)
modelPosToScatterItem(i, 0, array[count++]);
m_proxy->insertItems(start, array);
}
}
}
void ScatterItemModelHandler::handleRowsRemoved(const QModelIndex &parent, int start, int end)
{
Q_UNUSED(parent)
// Do nothing if full reset already pending
if (!m_fullReset) {
if (m_itemModel->columnCount() > 1) {
// If the data model is multi-column, do full asynchronous reset to simplify things
AbstractItemModelHandler::handleRowsRemoved(parent, start, end);
} else {
m_proxy->removeItems(start, end - start + 1);
}
}
}
void ScatterItemModelHandler::modelPosToScatterItem(int modelRow, int modelColumn,
QScatterDataItem &item)
{
QModelIndex index = m_itemModel->index(modelRow, modelColumn);
float xPos(0.0f);
float yPos(0.0f);
float zPos(0.0f);
if (m_xPosRole != noRoleIndex)
xPos = index.data(m_xPosRole).toFloat();
if (m_yPosRole != noRoleIndex)
yPos = index.data(m_yPosRole).toFloat();
if (m_zPosRole != noRoleIndex)
zPos = index.data(m_zPosRole).toFloat();
item.setPosition(QVector3D(xPos, yPos, zPos));
}
// Resolve entire item model into QScatterDataArray.
void ScatterItemModelHandler::resolveModel()
{
if (m_itemModel.isNull()) {
m_proxy->resetArray(0);
m_proxyArray = 0;
return;
}
QHash<int, QByteArray> roleHash = m_itemModel->roleNames();
m_xPosRole = roleHash.key(m_proxy->xPosRole().toLatin1(), noRoleIndex);
m_yPosRole = roleHash.key(m_proxy->yPosRole().toLatin1(), noRoleIndex);
m_zPosRole = roleHash.key(m_proxy->zPosRole().toLatin1(), noRoleIndex);
const int columnCount = m_itemModel->columnCount();
const int rowCount = m_itemModel->rowCount();
const int totalCount = rowCount * columnCount;
int runningCount = 0;
// If dimensions have changed, recreate the array
if (m_proxyArray != m_proxy->array() || totalCount != m_proxyArray->size())
m_proxyArray = new QScatterDataArray(totalCount);
// Parse data into newProxyArray
for (int i = 0; i < rowCount; i++) {
for (int j = 0; j < columnCount; j++) {
modelPosToScatterItem(i, j, (*m_proxyArray)[runningCount]);
runningCount++;
}
}
m_proxy->resetArray(m_proxyArray);
}
QT_END_NAMESPACE_DATAVISUALIZATION
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