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Diffstat (limited to 'src/datavisualization/data/abstractitemmodelhandler.cpp')
| -rw-r--r-- | src/datavisualization/data/abstractitemmodelhandler.cpp | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/src/datavisualization/data/abstractitemmodelhandler.cpp b/src/datavisualization/data/abstractitemmodelhandler.cpp new file mode 100644 index 00000000..0ad0ac0b --- /dev/null +++ b/src/datavisualization/data/abstractitemmodelhandler.cpp @@ -0,0 +1,250 @@ +/**************************************************************************** +** +** 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 |