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Diffstat (limited to 'src/charts/xychart/qxymodelmapper.cpp')
| -rw-r--r-- | src/charts/xychart/qxymodelmapper.cpp | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/src/charts/xychart/qxymodelmapper.cpp b/src/charts/xychart/qxymodelmapper.cpp new file mode 100644 index 00000000..3907326d --- /dev/null +++ b/src/charts/xychart/qxymodelmapper.cpp @@ -0,0 +1,533 @@ +/**************************************************************************** +** +** 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 Qt Enterprise Charts Add-on. +** +** $QT_BEGIN_LICENSE$ +** 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 +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qxymodelmapper.h" +#include "qxymodelmapper_p.h" +#include "qxyseries.h" +#include <QAbstractItemModel> +#include <QDateTime> + +QT_CHARTS_BEGIN_NAMESPACE + +/*! + Constructs a mapper object which is a child of \a parent. +*/ +QXYModelMapper::QXYModelMapper(QObject *parent) + : QObject(parent), + d_ptr(new QXYModelMapperPrivate(this)) +{ +} + +/*! + \internal +*/ +QAbstractItemModel *QXYModelMapper::model() const +{ + Q_D(const QXYModelMapper); + return d->m_model; +} + +/*! + \internal +*/ +void QXYModelMapper::setModel(QAbstractItemModel *model) +{ + if (model == 0) + return; + + Q_D(QXYModelMapper); + if (d->m_model) + disconnect(d->m_model, 0, d, 0); + + d->m_model = model; + d->initializeXYFromModel(); + // connect signals from the model + connect(d->m_model, SIGNAL(dataChanged(QModelIndex,QModelIndex)), d, SLOT(modelUpdated(QModelIndex,QModelIndex))); + connect(d->m_model, SIGNAL(rowsInserted(QModelIndex,int,int)), d, SLOT(modelRowsAdded(QModelIndex,int,int))); + connect(d->m_model, SIGNAL(rowsRemoved(QModelIndex,int,int)), d, SLOT(modelRowsRemoved(QModelIndex,int,int))); + connect(d->m_model, SIGNAL(columnsInserted(QModelIndex,int,int)), d, SLOT(modelColumnsAdded(QModelIndex,int,int))); + connect(d->m_model, SIGNAL(columnsRemoved(QModelIndex,int,int)), d, SLOT(modelColumnsRemoved(QModelIndex,int,int))); + connect(d->m_model, SIGNAL(destroyed()), d, SLOT(handleModelDestroyed())); +} + +/*! + \internal +*/ +QXYSeries *QXYModelMapper::series() const +{ + Q_D(const QXYModelMapper); + return d->m_series; +} + +/*! + \internal +*/ +void QXYModelMapper::setSeries(QXYSeries *series) +{ + Q_D(QXYModelMapper); + if (d->m_series) + disconnect(d->m_series, 0, d, 0); + + if (series == 0) + return; + + d->m_series = series; + d->initializeXYFromModel(); + // connect the signals from the series + connect(d->m_series, SIGNAL(pointAdded(int)), d, SLOT(handlePointAdded(int))); + connect(d->m_series, SIGNAL(pointRemoved(int)), d, SLOT(handlePointRemoved(int))); + connect(d->m_series, SIGNAL(pointReplaced(int)), d, SLOT(handlePointReplaced(int))); + connect(d->m_series, SIGNAL(destroyed()), d, SLOT(handleSeriesDestroyed())); +} + +/*! + \internal +*/ +int QXYModelMapper::first() const +{ + Q_D(const QXYModelMapper); + return d->m_first; +} + +/*! + \internal +*/ +void QXYModelMapper::setFirst(int first) +{ + Q_D(QXYModelMapper); + d->m_first = qMax(first, 0); + d->initializeXYFromModel(); +} + +/*! + \internal +*/ +int QXYModelMapper::count() const +{ + Q_D(const QXYModelMapper); + return d->m_count; +} + +/*! + \internal +*/ +void QXYModelMapper::setCount(int count) +{ + Q_D(QXYModelMapper); + d->m_count = qMax(count, -1); + d->initializeXYFromModel(); +} + +/*! + Returns the orientation that is used when QXYModelMapper accesses the model. + This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal) + or from columns (Qt::Vertical) +*/ +Qt::Orientation QXYModelMapper::orientation() const +{ + Q_D(const QXYModelMapper); + return d->m_orientation; +} + +/*! + Returns the \a orientation that is used when QXYModelMapper accesses the model. + This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal) + or from columns (Qt::Vertical) +*/ +void QXYModelMapper::setOrientation(Qt::Orientation orientation) +{ + Q_D(QXYModelMapper); + d->m_orientation = orientation; + d->initializeXYFromModel(); +} + +/*! + Returns which section of the model is kept in sync with the x values of the QXYSeries +*/ +int QXYModelMapper::xSection() const +{ + Q_D(const QXYModelMapper); + return d->m_xSection; +} + +/*! + Sets the model section that is kept in sync with the x values of the QXYSeries. + Parameter \a xSection specifies the section of the model. +*/ +void QXYModelMapper::setXSection(int xSection) +{ + Q_D(QXYModelMapper); + d->m_xSection = qMax(-1, xSection); + d->initializeXYFromModel(); +} + +/*! + Returns which section of the model is kept in sync with the y values of the QXYSeries +*/ +int QXYModelMapper::ySection() const +{ + Q_D(const QXYModelMapper); + return d->m_ySection; +} + +/*! + Sets the model section that is kept in sync with the y values of the QXYSeries. + Parameter \a ySection specifies the section of the model. +*/ +void QXYModelMapper::setYSection(int ySection) +{ + Q_D(QXYModelMapper); + d->m_ySection = qMax(-1, ySection); + d->initializeXYFromModel(); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *q) : + QObject(q), + m_series(0), + m_model(0), + m_first(0), + m_count(-1), + m_orientation(Qt::Vertical), + m_xSection(-1), + m_ySection(-1), + m_seriesSignalsBlock(false), + m_modelSignalsBlock(false), + q_ptr(q) +{ +} + +void QXYModelMapperPrivate::blockModelSignals(bool block) +{ + m_modelSignalsBlock = block; +} + +void QXYModelMapperPrivate::blockSeriesSignals(bool block) +{ + m_seriesSignalsBlock = block; +} + +QModelIndex QXYModelMapperPrivate::xModelIndex(int xPos) +{ + if (m_count != -1 && xPos >= m_count) + return QModelIndex(); // invalid + + if (m_orientation == Qt::Vertical) + return m_model->index(xPos + m_first, m_xSection); + else + return m_model->index(m_xSection, xPos + m_first); +} + +QModelIndex QXYModelMapperPrivate::yModelIndex(int yPos) +{ + if (m_count != -1 && yPos >= m_count) + return QModelIndex(); // invalid + + if (m_orientation == Qt::Vertical) + return m_model->index(yPos + m_first, m_ySection); + else + return m_model->index(m_ySection, yPos + m_first); +} + +qreal QXYModelMapperPrivate::valueFromModel(QModelIndex index) +{ + QVariant value = m_model->data(index, Qt::DisplayRole); + switch (value.type()) { + case QVariant::DateTime: + return value.toDateTime().toMSecsSinceEpoch(); + case QVariant::Date: + return QDateTime(value.toDate()).toMSecsSinceEpoch(); + default: + return value.toReal(); + } +} + +void QXYModelMapperPrivate::setValueToModel(QModelIndex index, qreal value) +{ + QVariant oldValue = m_model->data(index, Qt::DisplayRole); + switch (oldValue.type()) { + case QVariant::DateTime: + m_model->setData(index, QDateTime::fromMSecsSinceEpoch(value)); + break; + case QVariant::Date: + m_model->setData(index, QDateTime::fromMSecsSinceEpoch(value).date()); + break; + default: + m_model->setData(index, value); + } +} + +void QXYModelMapperPrivate::handlePointAdded(int pointPos) +{ + if (m_seriesSignalsBlock) + return; + + if (m_count != -1) + m_count += 1; + + blockModelSignals(); + if (m_orientation == Qt::Vertical) + m_model->insertRows(pointPos + m_first, 1); + else + m_model->insertColumns(pointPos + m_first, 1); + + setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); + setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); + blockModelSignals(false); +} + +void QXYModelMapperPrivate::handlePointRemoved(int pointPos) +{ + if (m_seriesSignalsBlock) + return; + + if (m_count != -1) + m_count -= 1; + + blockModelSignals(); + if (m_orientation == Qt::Vertical) + m_model->removeRow(pointPos + m_first); + else + m_model->removeColumn(pointPos + m_first); + blockModelSignals(false); +} + +void QXYModelMapperPrivate::handlePointReplaced(int pointPos) +{ + if (m_seriesSignalsBlock) + return; + + blockModelSignals(); + setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); + setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); + blockModelSignals(false); +} + +void QXYModelMapperPrivate::handleSeriesDestroyed() +{ + m_series = 0; +} + +void QXYModelMapperPrivate::modelUpdated(QModelIndex topLeft, QModelIndex bottomRight) +{ + if (m_model == 0 || m_series == 0) + return; + + if (m_modelSignalsBlock) + return; + + blockSeriesSignals(); + QModelIndex index; + QPointF oldPoint; + QPointF newPoint; + for (int row = topLeft.row(); row <= bottomRight.row(); row++) { + for (int column = topLeft.column(); column <= bottomRight.column(); column++) { + index = topLeft.sibling(row, column); + if (m_orientation == Qt::Vertical && (index.column() == m_xSection || index.column() == m_ySection)) { + if (index.row() >= m_first && (m_count == - 1 || index.row() < m_first + m_count)) { + QModelIndex xIndex = xModelIndex(index.row() - m_first); + QModelIndex yIndex = yModelIndex(index.row() - m_first); + if (xIndex.isValid() && yIndex.isValid()) { + oldPoint = m_series->points().at(index.row() - m_first); + newPoint.setX(valueFromModel(xIndex)); + newPoint.setY(valueFromModel(yIndex)); + } + } + } else if (m_orientation == Qt::Horizontal && (index.row() == m_xSection || index.row() == m_ySection)) { + if (index.column() >= m_first && (m_count == - 1 || index.column() < m_first + m_count)) { + QModelIndex xIndex = xModelIndex(index.column() - m_first); + QModelIndex yIndex = yModelIndex(index.column() - m_first); + if (xIndex.isValid() && yIndex.isValid()) { + oldPoint = m_series->points().at(index.column() - m_first); + newPoint.setX(valueFromModel(xIndex)); + newPoint.setY(valueFromModel(yIndex)); + } + } + } else { + continue; + } + m_series->replace(oldPoint, newPoint); + } + } + blockSeriesSignals(false); +} + +void QXYModelMapperPrivate::modelRowsAdded(QModelIndex parent, int start, int end) +{ + Q_UNUSED(parent); + if (m_modelSignalsBlock) + return; + + blockSeriesSignals(); + if (m_orientation == Qt::Vertical) + insertData(start, end); + else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy + initializeXYFromModel(); + blockSeriesSignals(false); +} + +void QXYModelMapperPrivate::modelRowsRemoved(QModelIndex parent, int start, int end) +{ + Q_UNUSED(parent); + if (m_modelSignalsBlock) + return; + + blockSeriesSignals(); + if (m_orientation == Qt::Vertical) + removeData(start, end); + else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy + initializeXYFromModel(); + blockSeriesSignals(false); +} + +void QXYModelMapperPrivate::modelColumnsAdded(QModelIndex parent, int start, int end) +{ + Q_UNUSED(parent); + if (m_modelSignalsBlock) + return; + + blockSeriesSignals(); + if (m_orientation == Qt::Horizontal) + insertData(start, end); + else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy + initializeXYFromModel(); + blockSeriesSignals(false); +} + +void QXYModelMapperPrivate::modelColumnsRemoved(QModelIndex parent, int start, int end) +{ + Q_UNUSED(parent); + if (m_modelSignalsBlock) + return; + + blockSeriesSignals(); + if (m_orientation == Qt::Horizontal) + removeData(start, end); + else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy + initializeXYFromModel(); + blockSeriesSignals(false); +} + +void QXYModelMapperPrivate::handleModelDestroyed() +{ + m_model = 0; +} + +void QXYModelMapperPrivate::insertData(int start, int end) +{ + if (m_model == 0 || m_series == 0) + return; + + if (m_count != -1 && start >= m_first + m_count) { + return; + } else { + int addedCount = end - start + 1; + if (m_count != -1 && addedCount > m_count) + addedCount = m_count; + int first = qMax(start, m_first); + int last = qMin(first + addedCount - 1, m_orientation == Qt::Vertical ? m_model->rowCount() - 1 : m_model->columnCount() - 1); + for (int i = first; i <= last; i++) { + QPointF point; + QModelIndex xIndex = xModelIndex(i - m_first); + QModelIndex yIndex = yModelIndex(i - m_first); + if (xIndex.isValid() && yIndex.isValid()) { + point.setX(valueFromModel(xIndex)); + point.setY(valueFromModel(yIndex)); + m_series->insert(i - m_first, point); + } + } + + // remove excess of points (above m_count) + if (m_count != -1 && m_series->points().size() > m_count) + for (int i = m_series->points().size() - 1; i >= m_count; i--) { + m_series->remove(m_series->points().at(i)); + } + } +} + +void QXYModelMapperPrivate::removeData(int start, int end) +{ + if (m_model == 0 || m_series == 0) + return; + + int removedCount = end - start + 1; + if (m_count != -1 && start >= m_first + m_count) { + return; + } else { + int toRemove = qMin(m_series->count(), removedCount); // first find how many items can actually be removed + int first = qMax(start, m_first); // get the index of the first item that will be removed. + int last = qMin(first + toRemove - 1, m_series->count() + m_first - 1); // get the index of the last item that will be removed. + for (int i = last; i >= first; i--) { + m_series->remove(m_series->points().at(i - m_first)); + } + + if (m_count != -1) { + int itemsAvailable; // check how many are available to be added + if (m_orientation == Qt::Vertical) + itemsAvailable = m_model->rowCount() - m_first - m_series->count(); + else + itemsAvailable = m_model->columnCount() - m_first - m_series->count(); + int toBeAdded = qMin(itemsAvailable, m_count - m_series->count()); // add not more items than there is space left to be filled. + int currentSize = m_series->count(); + if (toBeAdded > 0) + for (int i = m_series->count(); i < currentSize + toBeAdded; i++) { + QPointF point; + QModelIndex xIndex = xModelIndex(i); + QModelIndex yIndex = yModelIndex(i); + if (xIndex.isValid() && yIndex.isValid()) { + point.setX(valueFromModel(xIndex)); + point.setY(valueFromModel(yIndex)); + m_series->insert(i, point); + } + } + } + } +} + +void QXYModelMapperPrivate::initializeXYFromModel() +{ + if (m_model == 0 || m_series == 0) + return; + + blockSeriesSignals(); + // clear current content + m_series->clear(); + + // create the initial points set + int pointPos = 0; + QModelIndex xIndex = xModelIndex(pointPos); + QModelIndex yIndex = yModelIndex(pointPos); + while (xIndex.isValid() && yIndex.isValid()) { + QPointF point; + point.setX(valueFromModel(xIndex)); + point.setY(valueFromModel(yIndex)); + m_series->append(point); + pointPos++; + xIndex = xModelIndex(pointPos); + yIndex = yModelIndex(pointPos); + } + blockSeriesSignals(false); +} + +#include "moc_qxymodelmapper.cpp" +#include "moc_qxymodelmapper_p.cpp" + +QT_CHARTS_END_NAMESPACE |