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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 "abstractitemmodelhandler_p.h"
#include "qabstractdatamapping.h"
#include <QTimer>
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
AbstractItemModelHandler::AbstractItemModelHandler(QObject *parent)
: QObject(parent),
m_activeMapping(0),
resolvePending(0)
{
m_resolveTimer.setSingleShot(true);
QObject::connect(&m_resolveTimer, &QTimer::timeout,
this, &AbstractItemModelHandler::handlePendingResolve);
}
AbstractItemModelHandler::~AbstractItemModelHandler()
{
}
void AbstractItemModelHandler::setItemModel(const QAbstractItemModel *itemModel)
{
if (!m_itemModel.isNull())
QObject::disconnect(m_itemModel, 0, this, 0);
m_itemModel = itemModel;
if (!m_itemModel.isNull()) {
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsInserted,
this, &AbstractItemModelHandler::handleColumnsInserted);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsMoved,
this, &AbstractItemModelHandler::handleColumnsMoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsRemoved,
this, &AbstractItemModelHandler::handleColumnsRemoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::dataChanged,
this, &AbstractItemModelHandler::handleDataChanged);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::layoutChanged,
this, &AbstractItemModelHandler::handleLayoutChanged);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::modelReset,
this, &AbstractItemModelHandler::handleModelReset);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsInserted,
this, &AbstractItemModelHandler::handleRowsInserted);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsMoved,
this, &AbstractItemModelHandler::handleRowsMoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsRemoved,
this, &AbstractItemModelHandler::handleRowsRemoved);
}
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0);
}
const QAbstractItemModel *AbstractItemModelHandler::itemModel() const
{
return m_itemModel.data();
}
void AbstractItemModelHandler::setActiveMapping(QAbstractDataMapping *mapping)
{
if (m_activeMapping)
QObject::disconnect(m_activeMapping, 0, this, 0);
if (mapping)
addMapping(mapping);
m_activeMapping = mapping;
if (m_activeMapping) {
QObject::connect(m_activeMapping, &QAbstractDataMapping::mappingChanged,
this, &AbstractItemModelHandler::handleMappingChanged);
}
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0);
}
QAbstractDataMapping *AbstractItemModelHandler::activeMapping() const
{
return m_activeMapping;
}
void AbstractItemModelHandler::addMapping(QAbstractDataMapping *mapping)
{
Q_ASSERT(mapping);
AbstractItemModelHandler *owner = qobject_cast<AbstractItemModelHandler *>(mapping->parent());
if (owner != this) {
Q_ASSERT_X(!owner, "addMapping", "Mapping already attached to a proxy.");
mapping->setParent(this);
}
if (!m_mappings.contains(mapping))
m_mappings.append(mapping);
}
void AbstractItemModelHandler::releaseMapping(QAbstractDataMapping *mapping)
{
if (mapping && m_mappings.contains(mapping)) {
// If the mapping is in use, clear the existing mapping
if (m_activeMapping == mapping)
setActiveMapping(0);
m_mappings.removeAll(mapping);
mapping->setParent(0);
}
}
QList<QAbstractDataMapping *> AbstractItemModelHandler::mappings() const
{
return m_mappings;
}
void AbstractItemModelHandler::handleColumnsInserted(const QModelIndex &parent,
int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve new items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleColumnsMoved(const QModelIndex &sourceParent,
int sourceStart,
int sourceEnd,
const QModelIndex &destinationParent,
int destinationColumn)
{
Q_UNUSED(sourceParent)
Q_UNUSED(sourceStart)
Q_UNUSED(sourceEnd)
Q_UNUSED(destinationParent)
Q_UNUSED(destinationColumn)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleColumnsRemoved(const QModelIndex &parent,
int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Remove old items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleDataChanged(const QModelIndex &topLeft,
const QModelIndex &bottomRight,
const QVector<int> &roles)
{
Q_UNUSED(topLeft)
Q_UNUSED(bottomRight)
Q_UNUSED(roles)
// Resolve changed items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleLayoutChanged(const QList<QPersistentModelIndex> &parents,
QAbstractItemModel::LayoutChangeHint hint)
{
Q_UNUSED(parents)
Q_UNUSED(hint)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleModelReset()
{
// Data cleared, reset array
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsInserted(const QModelIndex &parent, int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve new items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsMoved(const QModelIndex &sourceParent,
int sourceStart,
int sourceEnd,
const QModelIndex &destinationParent,
int destinationRow)
{
Q_UNUSED(sourceParent)
Q_UNUSED(sourceStart)
Q_UNUSED(sourceEnd)
Q_UNUSED(destinationParent)
Q_UNUSED(destinationRow)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsRemoved(const QModelIndex &parent, int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve removed items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleMappingChanged()
{
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0);
}
void AbstractItemModelHandler::handlePendingResolve()
{
resolveModel();
}
QT_DATAVISUALIZATION_END_NAMESPACE
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